(PDF) 30RBS (39-160) 30RQS (39-160) - ahi-carrier.gr · CONTROLS MANUAL. Touch Pilot Junior. 30RBS (39-160) 30RQS (39-160) Original document - PDFSLIDE.NET (2022)

  • CONTROLS MANUAL

    Touch Pilot Junior

    30RBS (39-160)30RQS (39-160)

    Original document

  • 2

    CONTENTS

    1 - SAFETY CONSIDERATIONS...............................................................................................................................................51.1 - Safety guidelines.......................................................................................................................................................................51.2 - Safety precautions....................................................................................................................................................................5

    2 - CONTROL OVERVIEW..........................................................................................................................................................52.1 - Control system..........................................................................................................................................................................52.2 - System functionalities..............................................................................................................................................................52.3 - Operating modes......................................................................................................................................................................5

    3 - CONTROL COMPONENTS...................................................................................................................................................63.1 - Touch Pilot Junior control.......................................................................................................................................................63.2 - Chiller........................................................................................................................................................................................63.3 - Features overview....................................................................................................................................................................6

    4 - HARDWARE.............................................................................................................................................................................74.1 - Control boards..........................................................................................................................................................................74.2 - Electrical box............................................................................................................................................................................74.3 - Power supply to boards............................................................................................................................................................74.4 - Light emitting diodes...............................................................................................................................................................74.5 - Pressure transducers................................................................................................................................................................74.6 - Temperature sensors................................................................................................................................................................74.7 - Actuators...................................................................................................................................................................................84.8 - Terminal block connections.....................................................................................................................................................8

    5 - HOW TO USE TOUCH PILOT JUNIOR USER INTERFACE.......................................................................................95.1 - Touch Pilot Junior overview....................................................................................................................................................95.2 - Touch Pilot Junior menu structure.......................................................................................................................................105.3 - Read the welcome screen......................................................................................................................................................115.4 - Explore the synoptic screen..................................................................................................................................................115.5 - Start the unit...........................................................................................................................................................................115.6 - Stop the unit............................................................................................................................................................................115.7 - Set the schedule......................................................................................................................................................................125.8 - Manage display settings.........................................................................................................................................................125.9 - Monitor unit parameters.......................................................................................................................................................135.10 - Modify unit parameters.......................................................................................................................................................145.11 - Override systemconfiguration............................................................................................................................................14

    6 - WEB CONNECTION..............................................................................................................................................................156.1 - Web interface..........................................................................................................................................................................156.2 - Open the web interface.........................................................................................................................................................156.3 - Manage web browser settings...............................................................................................................................................15

    7 - SETTING UP TOUCH PILOT JUNIOR - PARAMETERS...........................................................................................167.1 - Main menu..............................................................................................................................................................................167.2 - Configuration menu (CONFIG)..........................................................................................................................................207.3 - Alarm menu...........................................................................................................................................................................23

    8 - STANDARD CONTROL OPERATIONS AND OPTIONS............................................................................................248.1 - Unit start/stop control...........................................................................................................................................................248.2 - Heating/Cooling/Standby......................................................................................................................................................258.3 - Cooling/heating selection......................................................................................................................................................268.4 - Supplementary heating..........................................................................................................................................................268.5 - Pumpcontrol...........................................................................................................................................................................268.6 - Hydronic kit option................................................................................................................................................................278.7 - Controlpoint...........................................................................................................................................................................288.8 - Capacity limitation.................................................................................................................................................................298.9 - Capacity control.....................................................................................................................................................................298.10 - Free cooling option..............................................................................................................................................................308.11 - Night mode............................................................................................................................................................................308.12 - Coil pressure control............................................................................................................................................................318.13 - Holidays.................................................................................................................................................................................318.14 - BACnet option......................................................................................................................................................................318.15 - Desuperheater option..........................................................................................................................................................318.16 - Defrost cycle for heat pumps..............................................................................................................................................318.17 - Master/Slave assembly.........................................................................................................................................................31

  • The cover photos are solely for illustration and forms no partof any offer for sale or any sale contract. The manufacturerreserves the right to change the design at any time withoutnotice.

    9 - DIAGNOSTICS........................................................................................................................................................................329.1 - Controldiagnostics.................................................................................................................................................................329.2 - Alarms description.................................................................................................................................................................33

    10 - MAINTENANCE...................................................................................................................................................................35

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    PREFACE

    The goal of this document is to give a broad overview of themain functions of the control system used to control 30RBSair-cooled liquid chillers and 30RQS reversible heat pumps with 39to 160 kW cooling/heating capacity.

    Instructions in this manual are given as a guide to goodpractice in the installation, start-up and operation of the controlsystem. This document does not contain full service procedures forthe correct operation of the equipment.

    The support of a qualified Carrier Service Engineer is stronglyrecommended to ensure optimal operation of the equipment as well asthe optimization of all available functionalities.

    CAUTIONHeating option! Heating option applies to cooling-onlyunits fitted with a boiler and heat pumps.

    Note that this document may refer to optional components andcertain functions, options or accessories may not be available forthe specific unit. The cover images are solely for illustration andform no part of any offer for sale or any sale contract.

    IMPORTANT: All screenshots of the user interface provided inthis manual include text in English. After changing the language ofthe system, all labels will be in the language selected by theuser.

    Please read all instructions prior to proceeding with any work.Pay attention to all safety warnings.

    The information provided herein is solely for the purpose ofallowing customers to operate and service Carrier manufacturedequipment and it is not to be reproduced, modified or used for anyother purpose without the prior consent of Carrier Corporation.

    Acronyms/abbreviationsIn this manual, the refrigeration circuitsare called circuit A and circuit B. Compressors in circuit A arelabelled A1, A2, A3, whereas compressors in circuit B are labelledB1, B2.

    BMS Building Management SystemCCN Carrier Comfort NetworkDGTDischarge Gas TemperatureEXV Electronic Expansion ValveEHS ElectricHeater StageFC Free coolingOAT Outdoor Air TemperatureLED LightEmitting DiodeLEN Sensor Bus (internal communication bus linkingthe basic

    board to slave boards)SCT Saturated Condensing TemperatureSSTSaturated Suction TemperatureNetwork mode/Net Operating type:NetworkLocal-Off/LOFF Operating type: Local OffLocal-On/L-COperating type: Local On modeLocal-Schedule/L-SC Operating type:Local On following a time scheduleMaster mode/Mast Operating type:Master unit (master/slave assembly)Remote mode/Rem Operating type:Remote contacts

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    1 - SAFETY CONSIDERATIONS

    1.1 - Safety guidelines

    Installation, start-up and servicing of equipment can behazardous if certain factors particular to the installation are notconsidered: operating pressures, electrical components, voltages,and the installation site (elevated plinths and built-upstructures).

    Only qualified installation engineers and fully trainedtechnicians are authorised to install and start the equipment.

    All instructions and recommendations provided in the serviceguide, installation and operation manuals, as well as on tags andlabels fixed to the equipment, components and other accompanyingparts supplied separately must be read, understood andfollowed.

    Failure to comply with the instructions provided by themanufacturer may result in injury or product damage.

    Apply all safety standards and practices. Wear safety glassesand gloves. Use the proper tools to move heavy objects. Move unitscarefully and set them down gently.

    CAUTIONOnly qualified service technicians should be allowed toinstall and service the equipment.

    1.2 - Safety precautions

    Only personnel qualified in accordance with IEC (InternationalElectrotechnical Commission) recommendations may be permittedaccess to electrical components.

    It is particularly recommended that all sources of electricityto the unit should be shut off before any work is begun. Shut offthe main power supply at the main circuit breaker or isolator.

    IMPORTANT: The equipment uses and emits electromagnetic signals.Tests have shown that the equipment conforms to all applicablecodes with respect to electromagnetic compatibility.

    CAUTIONRisk of electrocution! Even when the main circuit breakeror isolator is switched off, specific circuits may still beenergised as they may be connected to a separate power source.

    CAUTIONRisk of burns! Electrical currents may cause componentsto get hot. Handle the power cable, electrical cables and conduits,terminal box covers and motor frames with great care.

    2 - CONTROL OVERVIEW

    2.1 - Control system

    Carrier 30RBS chillers and 30RQS heat pumps come with a TouchPilot Junior control that serves as the user interface andconfiguration tool for Carrier communicating devices.

    Touch Pilot Junior is an electronic control system used toregulate the following types of units: 30RBS air-cooled liquidchillers 30RQS reversible heat pumps

    Touch Pilot Junior control can function as a stand-alone systemor it may be connected to the building management system using CCNcommunication bus.

    30RBS and 30RQS units may be fitted with standard fixed speedfan control system or the optional variable speed fan drives whichcan reduce the unit energy use during occupied and unoccupiedperiods, provide condensing or evaporating pressure control andsmooth fan start.

    For both 30RBS chillers and 30RQS heat pumps the system maycontrol fixed speed pumps or variable speed pumps with a hydronicmodule.

    IMPORTANT: This document may refer to optional components andcertain functions, options or accessories may not be available forthe specific unit.

    2.2 - System functionalities

    The system controls the start-up of the compressors needed tomaintain the desired heat exchanger entering and leaving watertemperature. It constantly manages the operation of the fans inorder to maintain the correct refrigerant pressure in each circuitand monitors safety devices that protect the unit against failureand guarantee its optimal functioning.

    2.3 - Operating modes

    The control can operate in three independent modes: Local mode:The unit is controlled by commands from

    the user interface. Remote mode: The unit is controlled by drycontacts. Network mode: The unit is controlled by network

    commands (CCN or BACnet). Data communication cable is used toconnect the unit to the CCN communication bus.

    When the control operates autonomously (Local or Remote), itretains all of its control capabilities but does not offer any ofthe features of the Network.

    CAUTIONEmergency stop! The Network emergency stop command stopsthe unit regardless of its active operating type.

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    3.2 - Chiller

    The control manages a number of mechanisms that allow the unitto operate effectively. Touch Pilot Junior controls

    compressors, fixed or variable speed fans, fixed or variablespeed pumps for evaporator/condenser, and more.

    Legend:1 Low sound fan system2 Touch Pilot Junior controlsystem3 Condenser4 Hydronic module with variable speed pump control(option)5 Evaporator6 Electronic Expansion Valve7 Scrollcompressor(s)

    3.3 - Features overviewFeature Chillers (30RBS) Heat pumps(30RQS)4.3'' touch screen (Touch Pilot Junior) X XWeb connectivityX XE-mail transmission X XCarrier Connect Services X XLanguagepacks X XLanguage pack customization X XMetric / Imperial unitdisplay X XBMS connection X XCCN communication X XScroll compressortechnology X XWater exchanger heater X XDefrost mechanismXDiagnostics X XVariable speed fans O OHigh static fan O OFixed orvariable speed pumps O OCooling control X X Heating control OXBoiler heating control O OElectric heating control OFree Coolingcontrol O ODesuperheater O O

    * X indicates a standard feature, whereas O indicates anoption.

    Figure 1: 30RBS unit with Touch Pilot Junior control (picturefor reference only)

    Supports Carrier Advanced Plant System Manager for multiplechillers/heat pumps configuration.

    Provides direct BMS integration capabilities (RS485 /Ethernet).

    3.1 - Touch Pilot Junior control

    Touch Pilot Junior control system: Allows users to control theunit via the Touch Pilot

    Junior user interface. Provides web connectivity technology.Supports Carrier Connect Services (Remote

    connectivity, alarm notification, remote access, performance andoperation automatic reporting, technical advice).

    3 - CONTROL COMPONENTS

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    4.1 - Control boards

    All boards making up the Touch Pilot Junior control system areinstalled inside the electrical cabinet. They communicate via aninternal LEN bus.

    The system may embrace up to two SIOB boards, where the firstboard is used to manage all major inputs and outputs of thecontroller, whereas the second SIOB board is used to support eitherthe compressor of circuit A or circuit B.

    The first SIOB board is also referred to as the main board themain board continuously monitors the information received fromvarious pressure and temperature probes and accordingly starts theprogram that controls the unit.

    At the same time, up to two (2) AUX1 boards can be installed.The first AUX1 board may provide additional inputs and outputs usedto monitor chiller water system cooling temperature (Master/Slaveassembly), leakage charge detection readings, electric heating orboiler operation. This board is used only for smaller units (unitswith only one fan) that have any of the aforementioned optionsavailable (electric heaters, boiler, etc.). The second AUX1 boardis optional and it is used for units with the dry cooler option. Itprovides information required to control the free coolingcycle.

    4.2 - Electrical box

    The electrical box includes all boards controlling the unit andthe user interface (Touch Pilot Junior).

    4.3 - Power supply to boards

    All boards are supplied from a common 24 VAC supply referred toearth.

    In the event of a power supply interrupt, the unit restartsautomatically without the need for an external command. However,any faults active when the supply is interrupted are saved and mayin certain cases prevent a given circuit or the unit fromrestarting.

    CAUTION

    Maintain correct polarity when connecting the power supply tothe boards, otherwise the boards may be damaged.

    4.4 - Light emitting diodes

    All boards continuously check and indicate the proper operationof their electronic circuits. A light emitting diode (LED) lightson each board when it is operating properly.

    The red LED flashing for a two-second period indicates correctoperation. A different rate indicates a board or a softwarefailure.

    The green LED flashes continuously on all boards to show thatthe board is communicating correctly over its internal bus (LENbus). If the green LED is not flashing, this indicates a LEN buswiring problem or a configuration issue.

    4 - HARDWARE

    4.5 - Pressure transducers

    Three types of transducers (high pressure, low pressure, waterpressure) are used to measure various pressures in each circuit.These transducers deliver 0 to 5 VDC. They are connected to theSIOB board.

    Discharge pressure transducers (high pressure type)Thesetransducers measure the discharge pressure in each circuit. Theyare used to control condensing pressure or high pressure loadshedding. Discharge pressure sensors are mounted on the dischargeline piping of each circuit.

    Suction pressure transducers (low pressure type)Thesetransducers measure the suction pressure in each circuit. They areused to control EXV, evaporating pressure (in heating mode) andmonitor suction pressure safeties related to the compressoroperating envelope. Suction pressure sensors are located on thecommon suction piping of each circuit.

    Pump inlet/outlet water pressure transducers (water pressuretype, hydronic kit option)These transducers measure the hydronickit pump water inlet/outlet water pressure and monitor the waterflow. Pump inlet/outlet water pressure sensors are mounted on theoptional hydronic kit.

    4.6 - Temperature sensors

    Temperature sensors constantly measure the temperature ofvarious components of the unit, ensuring the correct operation ofthe system.

    Water heat exchanger entering and leaving water temperaturesensorsThe water heat exchanger entering and leaving watertemperature sensors are used for capacity control and safetypurposes.

    Outdoor air temperature sensorThis sensor measuring the outdoorair temperature is used for start-up, setpoint temperature resetand frost control.

    Suction gas temperature sensorsThese sensors measure the suctiongas temperature. They are used for the EXV control. Suction gastemperature sensors are located at the suction side of eachcircuit.

    Master/slave water sensor (optional)This sensor measures thecommon water temperature in the master/slave system capacitycontrol. It is installed only in the case of master/slaveunits.

    Defrost temperature sensors (heat pumps)These sensors are usedto determine the end of the defrost cycle for a given circuit.

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    4.7 - Actuators

    Electronic expansion valveThe electronic expansion valve (EXV)is used to adjust the refrigerant flow to changes in the operatingconditions of the machine. The high degree of accuracy with whichthe piston is positioned provides precise control of therefrigerant flow and suction superheat.

    Water flow switchFor units without internal pumps, the waterflow switch configuration allows for the automatic control of theminimum water flow setpoint of the water flow switch. Theconfiguration depends on the unit size and is made automatically atthe start-up. If the flow switch fails, the alarm condition shutsoff the unit.

    Water heat exchanger pumps (optional)The controller can regulateone or two fixed speed or variable speed water heat exchanger pumpsand takes care of the automatic changeover between these pumps (seealso section 8.5).

    Four-way valve (heat pumps only)The control actuates thefour-way valve for cooling / heating mode and defrostssessions.

    4.8 - Terminal block connections

    Connections available at the user terminal block may varydepending on the selected options.

    The following table summarizes the connections at the userterminal block.

    IMPORTANT: Some contacts can be accessed only when the unitoperates in Remote mode.

    4.8.1 - Volt-free contact (on/off and cooling/heating)Forchillers with a boiler or heat pumps, on/off contacts andcooling/heating contacts are as follows:

    Off Cooling Heating Auto On/Off contact [ON_OFF_SW]

    open closed closed open

    Cooling/heating contact [HC_SW]

    open open closed closed

    Off: Unit is stoppedCooling: Unit is allowed to start inCoolingHeating: Unit is allowed to start in Heating (chiller withboiler control or heat

    pump)Auto: Unit can run in Cooling or Heating in accordance withthe changeover

    values. If the auto changeover is enabled (Heat/Cool Select[HC_SEL], GENUNIT), the operating mode is selected based onOAT.

    4.8.2 - Volt-free setpoint selection contactThis dry contactinput is used to switch between setpoints. It is active only whenthe control is in Remote mode.

    Cooling HeatingStp 1 Stp 2 Stp 1 Stp 2

    Setpoint selection contact[SP_SW]

    open closed open closed

    4.8.3 - Volt-free demand limit selection contactThree stepsdemand limit based on two dry contacts can be used to limit unitcapacity.

    100% Limit 1 Limit 2 Limit 3Demand limit switch 1 [LIM_SW1]

    open closed open closed

    Demand limit switch 2 [LIM_SW2]

    open open closed closed

    Description Board Connector / Input / Output TerminalRemarksOn/Off Switch SIOB #1 J1 / DI-01 32-33 Used for the uniton/off control (Remote mode)Second Setpoint Switch SIOB #1 J1 /DI-02 65-66 Used to switch between setpoints See section 4.8.2LimitSwitch #1 SIOB #1 J1 / DI-03 73-74 Used to control demand limit.See section 4.8.3Limit Switch #2 SIOB #1 J1 / DI-04 75-76 Used tocontrol demand limit. See section 4.8.3Heat/Cool Select SIOB #1 J3/ DI-06 63-64 Used to switch between cooling and heating when theunit is in

    Remote mode (Heat pumps only)Desuperheater Switch SIOB #1 J3 /DI-07 49-49A Heat recovery is allowedpower_input_stable SIOB #1 J3/ DI-08 -Water Pump #1 SIOB #1 J6 / IN03-DO-03 - The control canregulate one or two evaporator pumps and

    automatically change over between the two pumpsWater Pump #2SIOB #1 J6 / IN04-DO-04 - The control can regulate one or twoevaporator pumps and

    automatically change over between the two pumpsRunning RelaySIOB #1 J23 / DO-05 37-38 Indicates if the unit is ready to startor operatingAlarm Relay SIOB #1 J22 / DO-06 30-31 IndicatesalarmsLimit Analog Signal SIOB #1 J9 / AI-10 43-44 Used forSetpoint ResetElectrical Heat Stage #1 SIOB #2 J6 / DO-03 - Used tomanage electric heating stage (1)Electrical Heat Stage #2 SIOB #2J6 / DO-04 - Used to manage electric heating stage (2)ElectricalHeat Stage #3 SIOB #2 J23 / DO-05 - Used to manage electric heatingstage (3)Boiler or Electrical Heat Stage #4 SIOB #2 J22 / DO-06 -Used to manage boiler heating or electric heating stage (4)

  • 9

    5 - HOW TO USE TOUCH PILOT JUNIOR USER INTERFACE

    ConnectionsConnections are located on the back side of thecontroller.

    USB ETHERNET CCN LEN POWER SUPPLY (24 VAC)

    Home button

    Main mbutton

    menun

    Log in / Lo

    Un

    g out

    nit status

    Curdisp

    Curnot

    Ala

    rrent menu play

    rrent ifications

    rm display

    Home button

    Main mbutton

    menun

    Log in / Lo

    Un

    g out

    nit status

    Curdisp

    Curnot

    Ala

    rrent menu play

    rrent ifications

    rm display

    Figure 2: Touch Pilot Junior user interface display

    Features of Touch Pilot Junior user interface 4.3"colour touchscreen with quick display of alarms,

    current unit operating status, etc. Resistive touch screentechnology Web connectivity Custom language support

    5.1 - Touch Pilot Junior overview

    Touch Pilot Junior provides access to the following screens:Welcome screen Synoptic screen Operating mode selection screenData/configuration screens Password entry and language selectionscreen Alarms screen Parameter modification screen Time schedulescreen

    WARNINGIf the Touch Pilot user interface is not used for a longperiod, the Welcome screen is displayed, and then it goes blank.The control is always active and the operating mode remainsunchanged. Press anywhere on the screen and the Welcome screen willbe displayed.

  • 10

    5.2 - Touch Pilot Junior menu structure

  • 11

    The bell located in the upper-right part of the screen lightswhen any fault is detected. By default, the parameters arepresented in metric units. For more information on how to changethe system of measurement, see section 5.8.3.

    5.5 - Start the unit

    With the unit in the Local off mode, press the Start/Stop

    button to display the list of operating modes and

    select the required mode.

    Local On Local On: The unit is in the local control mode andallowed to start.

    Local Schedule

    Local Schedule: The unit is in the local control mode andallowed to start if the period is occupied.

    Network Network: The unit is controlled by network commands andallowed to start if the period is occupied.

    Remote Remote: The unit is controlled by external commands andallowed to start if the period is occupied.

    Master Master: The unit operates as the master in themaster/slave assembly and allowed to start if the period isoccupied.

    IMPORTANT: When entering the menu, please note that thecurrently selected item corresponds to the last running operatingmode.

    5.6 - Stop the unit

    To stop the unit, press the Start/Stop button

    Confirm the unit shutdown by pressing Confirm Stop or cancel theunit shutdown by pressing the

    Back button

    5.3 - Read the welcome screen

    The Welcome screen is the first screen shown after starting theuser interface. It displays the application name as well as thecurrent software version number.

    Home button

    Software version number

    To exit the Welcome screen, press

    Information message boxThe information box displayed in thestatus bar at the bottom of the screen includes relevant messagesregarding the current user action.

    All screens presented further in this manual may display thefollowing messages:MESSAGE STATUSCOMMUNICATION FAILURE! Equipmentcontroller did not respond while

    reading the table content.ACCESS DENIED! Equipment controllerdenies access to one of

    the tables.LIMIT EXCEEDED! The value entered exceeds theparameter limit.Save changes? Modifications have been made. Theexit must be

    confirmed by pressing Save or Cancel.HIGHER FORCE IN EFFECT!Equipment controller rejects Force or Auto

    command.

    5.4 - Explore the synoptic screen

    The Synoptic screen provides an overview of the system control,allowing the user to monitor the vapour-refrigeration cycle.

    The diagram indicates the current status of the unit, givinginformation on the unit capacity, the status of water heatexchanger pumps, and the pre-defined setpoint parameter.

    All unit functions can be accessed by pressing the Main

    menu button

    IMPORTANT: The synoptic screen display may vary depending onpumps configuration.

    1

    4

    3

    2

    5

    1 Outdoor air temperature2 Unit capacity percentage3 Setpoint4Evaporator inlet and outlet water temperature5 Status screenmessage

    Shows the last mode selected

  • 12

    5.7 - Set the schedule

    The control incorporates two time schedules, where the first one(OCCPC01S) is used for controlling the unit start/stop, whereas thesecond one (OCCPC02S) is used for controlling the dual setpoint.The control offers the user the possibility of setting eightoccupancy periods.

    To set the unit start/stop schedule:1. Navigate to theConfiguration menu and select

    Schedule (SCHEDULE).2. Go to OCCPC01S. 3. Select appropriatecheck boxes to set the unit

    occupancy on specific days.4. Define the time of occupancy.5.When the time schedule is set, the selected period will

    be presented in the form of the green band on the timeline.

    6. Press to confirm or to cancel changes.

    3 4 5 6

    2

    1

    1 Selection of days for the time schedule2 Start/end of theschedule3 Save4 Cancel5 Previous time period6 Next time period

    IMPORTANT: Only logged-in users are allowed to access theConfiguration menu.

    5.8 - Manage display settings

    The User Login screen allows the user to select the language ofthe controller, change the system of measurement (imperial ormetric) and enter a password to gain access to more controloptions.

    To access the User Login screen, press the

    Log button in the upper-right corner of the screen (see

    also section 5.4).

    5.8.1 - Security access settings

    User-level security ensures that only authorised users areallowed to modify critical unit parameters.

    1 Cursor indicating the selected language2 Logged-in button3Logged-off button4 System of measurement: Metric/Imperial5 Passworddialog box

    IMPORTANT: Only logged-in users are allowed to access theConfiguration menu.

    WARNINGIt is strongly recommended to change the default passwordof the user interface to exclude the possibility of changing anyparameters by an unqualified person.

    Only people qualified to manage the unit should be familiarizedwith the password.

    User loginOnly logged-in users can access configurable unitparameters. By default, user password is 11.

    To log in as user:

    1. Press the Log button to open User Login Screen. 2. Press thePassword box.

    3. A dialog box appears.

    4. Provide the password (11) and press OK. 5. The User Loginscreen appears.

    6. Press to save or to cancel changes.

    Password box

  • 13

    Password changeUser password can be modified in the UserConfiguration menu.

    To change your password:1. Navigate to the Configuration menuand select

    User Configuration (USERCONF).2. Press the User Password box.3.A dialog box appears.

    4. Enter your new password and press OK.5. The UserConfiguration screen appears.

    6. Press to save or to cancel changes.

    5.8.2 - Display languageDisplay language can be modified in theUser Login Screen on the Touch Pilot Junior user interface.

    To change a display language:

    1. Press the Log button to open User Login Screen.2. Select thenew language of the display.

    3. Press to save or to cancel changes.

    IMPORTANT: Touch Pilot Junior allows users to add new languagesto the control. To learn more about language customization, pleasecontact your local Carrier representative.

    5.8.3 - System of measurementThe control offers the possibilityof selecting the system of measurement displayed on the userinterface.

    To change a system of measurement:

    1. Press the Log button to open User Login Screen.2. Select thesystem of measurement.

    3. Press to save or to cancel changes.

    5.9 - Monitor unit parameters

    The Main menu provides access to the main control parameters,including general parameters, inputs and outputs status, etc. Toaccess the menu, press the Main menu button located in theupper-left part of the Synoptic screen

    (see also section 5.4).

    Specific unit parameters can be accessed by pressing the iconcorresponding to the desired category.

    To go back to the Synoptic screen, press .

  • 14

    General unit parametersThe General parameters screen providesaccess to a set of general unit parameters.

    To access the General parameters screen, go to the Main

    menu and select General Parameters

    1

    1 Forceable point

    Press the Up/Down buttons to navigate between the screens.

    5.10 - Modify unit parameters

    The Configuration menu gives access to a number ofuser-modifiable parameters such as pump configuration, schedulemenu, etc. The Configuration menu is password-protected (see alsosection 5.8.1).

    Press the field corresponding to the parameter to be modifiedand introduce all the necessary changes.

    Press the Up/Down buttons to navigate between the screens. Onceall the necessary modifications have been made, press to confirm orto cancel changes.

    5.11 - Override system configuration

    In some cases it is possible to override system configuration.The override screen provides the option to issue the commandoverriding the current operation of the unit.

    To access the override screen, press the forceable point of thedata screen. Note that not all parameters can be overridden by thecontrol.

    1 Forced value2 Set force3 Auto

  • 15

    6.3 - Manage web browser settings

    Minimum web browser configuration: Internet Explorer (version 8or higher) or Mozilla

    Firefox (version 26 or higher). In the advanced connectionoptions add the unit IP address to the exceptions list. Do not usea proxy server.

    Java platform (version 6 or higher). In the control panel, clearthe Keep temporary files on my computer checkbox and use a directconnection.

    IMPORTANT: Two users can be connected simultaneously with nopriority between them. Note that the last modification is takeninto account.

    6 - WEB CONNECTION

    6.1 - Web interface

    The Touch Pilot Junior control can be accessed via a web browser(Internet Explorer, Mozilla Firefox, etc.). Connection is from a PCusing a web browser with Java.

    CAUTIONUse firewalls and VPN for secure connection.

    6.2 - Open the web interface

    To access the Touch Pilot Junior control, enter the IP addressof the unit in the address bar of the web browser.

    Unit default address: 169.254.0.1. This address can bechanged.

    IMPORTANT: Only two web connections can be authorised at thesame time.

    CAUTIONFor security reasons the unit cannot be started / stoppedvia the web interface.All other operations, including monitoringunit parameters or unit configuration, can be performed via the webbrowser interface.

  • 16

    Icon Displayed text* Description Name

    General Parameters General parameters GENUNIT

    Temperature Temperatures TEMP

    Pressure Pressures PRESSURE

    Inputs Inputs status INPUTS

    Outputs Outputs status OUTPUTS

    Pump Status Pump status PUMPSTAT

    Runtime Run times RUNTIME

    DC Free Cooling Status

    Dry Cooler - Free Cooling FCOOL_ST

    Modes Modes status MODES

    Setpoint Setpoints SETPOINT

    Configuration Configuration menu CONFIG

    *Depends on the selected language (English by default).

    CAUTIONSince specific units may not include additional features,some tables may contain parameters that cannot be configured for agiven unit.

    7 - SETTING UP TOUCH PILOT JUNIOR - PARAMETERS

    7.1 - Main menu

    General Parameters Menu GENUNIT

    Point name Status Unit Displayed text* Description1 CTRL_TYP 0to 2 - Local=0 Net.=1 Remote=2 Operating mode: 0 = Local, 1 =Network,

    2 = Remote2 STATUS xxx - Running Status Unit running status: 0 =Off, 1 = Running, 2 = Stopping,

    3 = Delay, 4 = Trip out, 5 = Ready, 6 = Override, 7 = Defrost, 8= Run Test, 9 = Test

    3 ALM xxx - Alarm State Alarm status4 min_left 0 to 0 minMinutes Left for Start Minutes left before the unit start-up5HEATCOOL Heat/Cool status Heating/Cooling status6 HC_SEL 0 to 2 -Heat/Cool Select Heating/Cooling selection

    0=Cool 1=Heat 2=Auto 0 = Cool, 1 = Heat, 2 = Auto7 SP_SEL 0 to 2- Setpoint Select Setpoint select

    0=Auto. 1=Spt1. 2=Spt2 0 = Auto, 1 = Setpoint 1, 2 = Setpoint 28SP_OCC no/yes - Setpoint Occupied? Setpoint occupied?9 CHIL_S_Sdsable/enable - Net.: Cmd Start/Stop Unit start/stop via Network:When the unit is in Network

    mode, start/stop command can be forced10 CHIL_OCC no/yes - Net.:Cmd Occupied Unit time schedule via Network: When the unit isin

    Network mode, the forced value can be used instead of the realoccupancy state

    11 CAP_T 0 to 100 % Percent Total Capacity Total unit capacity12 CAPA_T 0 to 100 % Circuit A Total Capacity Total capacity,circuit A13 CAPB_T 0 to 100 % Circuit B Total Capacity Totalcapacity, circuit B14 DEM_LIM 0 to 100 %

    Active Demand Limit Val

    Active demand limit value: When the unit is Network mode, theminimum value will be used compared to the status of the externallimit switch contact and the demand limit switch setpoint

    15 SP - C / F Current Setpoint Current setpoint16 CTRL_PNT -20.0to 67.0

    -4.0 to 153.0CF Control Point

    Control point: Water temperature that the unit must produce

    17 EMSTOP dsable/enable - Emergency Stop Emergency stop

    *Depends on the selected language (English by default).

  • 17

    Temperature Menu TEMP

    Point name Status Unit Displayed text* Description1 EWT - C / FEntering Water Temp Entering water temperature: Used for capacitycontrol2 LWT - C / F Leaving Water Temp Leaving water temperature:Used for capacity control3 OAT - C / F External Temperature Outdoorair temperature: Used to determine a number of control

    mechanisms such as heat/cool changeover, water exchanger heateroperation, defrost cycle

    4 CHWSTEMP - C / F Common Master/Slave Temp Common master/slavetemperature5 SCT_A - C / F Saturated Cond Tmp A Saturatedcondensing temperature, circuit A6 SST_A - C / F Saturated SuctionTmp A Saturated suction temperature, circuit A7 SCT_B - C / FSaturated Cond Tmp B Saturated condensing temperature, circuit B8SST_B - C / F Saturated Suction Tmp B Saturated suctiontemperature, circuit B9 DEFRT_A - C / F Defrost Temp Cir A Defrosttemperature, circuit A (heat pumps only)10 DEFRT_2 - C / F DefrostTemp Second Coil Defrost temperature on the second coil on circuitA (heat pumps

    only)11 sgtc1 - C / F Suction Gas Temp Coil 1 Suction gastemperature coil 112 sgtc2 - C / F Suction Gas Temp Coil 2 Suctiongas temperature coil 2

    *Depends on the selected language (English by default).

    Pressure Menu PRESSURE

    Point name Status Unit Displayed text* Description1 DP_A - kPa /PSI Discharge Pressure A Compressor discharge pressure, circuit A2SP_A - kPa / PSI Suction Pressure A Compressor suction pressure,circuit A3 DP_B - kPa / PSI Discharge Pressure B Compressordischarge pressure, circuit B4 SP_B - kPa / PSI Suction Pressure BCompressor suction pressure, circuit B

    *Depends on the selected language (English by default).

    Inputs Menu INPUTS

    Point name Status Unit Displayed text* Description1 ONOFF_SWopen/close - Remote On/Off Switch Remote On/Off switch2 HC_SWopen/close - Remote Heat/Cool Switch Remote Heat/Cool switch3on_ctrl xxx - Current Control Current control status: Off, On Cool,On Heat, On Auto 4 SETP_SW open/close - Remote Setpoint SwitchRemote setpoint switch5 LIM_SW1 open/close - Limit Switch 1 Demandlimit switch 16 LIM_SW2 open/close - Limit Switch 2 Demand limitswitch 27 LIM_ANAL - mA Limit Analog Input Limit Analog Input4-20mA8 FLOW_SW open/close - Flow Switch Water exchanger flowswitch9 leak_v - V Leakage detector #1 val Leakage detector 110leak_2_v - V Leakage detector #2 val Leakage detector 211 DSHT_SWopen/close - Desuperheater Switch Desuperheater switch12 PWRIN_STopen/close - Power Input Stable Power input stable13 HP_SWAopen/close - HP Switch Circuit A High pressure switch, circuit A14HP_SWA3B open/close - HP Switch Circuit A3/B High pressure switch,circuit B15 bacdongl no/yes - BACnet Dongle BACnet dongle status(BACnet option)

    *Depends on the selected language (English by default).

  • 18

    Outputs Menu OUTPUTS

    Point name Status Unit Displayed text* Description1 CP_A1 off/on- Compressor A1 Output Compressor A1 status2 CP_A2 off/on -Compressor A2 Output Compressor A2 status3 CP_A3 off/on -Compressor A3 Output Compressor A3 status4 FAN_A1LS off/on - FanA1LS Output Fan A1 low speed status5 FAN_A1HS off/on - Fan A1HSOutput Fan A1 high speed status6 FAN_A2LS off/on - Fan A2LS OutputFan A2 low speed status7 FAN_A2HS off/on - Fan A2HS Output Fan A2high speed status8 HD_POS_A - % Head Pressure Position A Headpressure, circuit A9 EXVPosA - % EXV Position Circuit A EXVposition, circuit A10 EXVNPosA - % EXV Next Pos Circuit A EXV nextposition, circuit A11 RV_A off/on - 4 Way Refrigerant ValveA 4-wayrefrigerant valve, circuit A: Used to manage cooling / heating

    / defrost operation (heat pumps)12 CP_B1 off/on - Compressor B1Output Compressor B1 status13 CP_B2 off/on - Compressor B2 OutputCompressor B2 status14 FAN_B1LS off/on - Fan B1LS Output Fan B1 lowspeed status15 FAN_B1HS off/on - Fan B1HS Output Fan B1 high speedstatus16 HD_POS_B - % Head Pressure Position B Head pressure,circuit B17 EXVPosB - % EXV Position Circuit B EXV position,circuit B18 EXVNPosB - % EXV Next Pos Circuit B EXV next position,circuit B19 RV_B off/on - 4 Way Refrigerant ValveB 4-wayrefrigerant valve, circuit B: Used to manage cooling/heating/

    defrost operation (heat pumps)20 C_HEATER off/on - Cooler &Drain Pan Heatr Water exchanger / Drain pan heater21 BOILER off/on- Boiler Command Boiler status22 EHS_STEP - - Electrical Heat StageElectric heating stages23 ALARM_R off/on - Alarm Relay Status Alarmrelay status24 RUN_R off/on - Running Status Unit ON relay 25OIL_VALV off/on - Oil Valve Status Oil valve status

    *Depends on the selected language (English by default).

    Pump Status Menu PUMPSTAT

    Point name Status Unit Displayed text* Description1 CPUMP_1off/on - Water Pump #1 Command Water pump 1 command2 CPUMP_2 off/on- Water Pump #2 Command Water pump 2 command3 ROT_PUMP no/yes -Rotate Pumps Now? Water exchanger pumps rotation4 W_P_IN - kPa /PSI Inlet Water Pressure Inlet water pressure5 W_P_OUT - kPa / PSIOutlet Water Pressure Outlet water pressure6 WP_CALIB no/yes -Water Pressure Calibrat Water pressure calibration7 WP_OFFST - kPa/ PSI Water Pressure Offset Water pressure offset8 DP_FILTR - kPa /PSI Delta Water Press. Filt Delta water pressure filtration9 WP_MIN- kPa / PSI Mini Water Pressure Minimum water pressure10 WAT_FLOW -l/s / GPS Water Flow Water flow status11 CAPPOWER - kW Actual PowerCapacity Actual power capacity12 p_dt_spt - ^C / ^F Water DTSetpoint Water discharge temperature setpoint13 p_dp_spt - kPa /PSI Water DP Setpoint Water discharge pressure setpoint14 drvp_pct- % Pump Drive Percent Pump drive percent15 drvp_pwr - kW PumpDrive Power Pump drive power16 drvp_i - A Pump Drive Amps Pumpdrive (A)17 drvp_ver xxx - Pump Drive Version Pump driveversion

    *Depends on the selected language (English by default).

  • 19

    Runtime Menu RUNTIME

    Point name Status Unit Displayed text* Description1 hr_mach -hour Machine Operating Hours Unit operating hours2 st_mach - -Machine Starts Number Number of unit starts3 hr_cp_a1 - hourCompressor A1 Hours Operating hours, compressor A14 st_cp_a1 - -Compressor A1 Starts Number of starts, compressor A15 hr_cp_a2 -hour Compressor A2 Hours Operating hours, compressor A26 st_cp_a2 -- Compressor A2 Starts Number of starts, compressor A27 hr_cp_a3 -hour Compressor A3 Hours Operating hours, compressor A38 st_cp_a3 -- Compressor A3 Starts Number of starts, compressor A39 hr_cp_b1 -hour Compressor B1 Hours Operating hours, compressor B110 st_cp_b1- - Compressor B1 Starts Number of starts, compressor B111 hr_cp_b2- hour Compressor B2 Hours Operating hours, compressor B212st_cp_b2 - - Compressor B2 Starts Number of starts, compressor B213hr_cpum1 - hour Water Pump #1 Hours Operating hours, water pump 114hr_cpum2 - hour Water Pump #2 Hours Operating hours, water pump 215hr_fana1 - hour Circuit A Fan #1 Hours Operating hours, fan 1,circuit A16 st_fana1 - - Circuit A Fan #1 Starts Number of starts,fan 1, circuit A17 hr_fana2 - hour Circuit A Fan #2 Hours Operatinghours, fan 2, circuit A18 st_fana2 - - Circuit A Fan #2 StartsNumber of starts, fan 2, circuit A19 hr_fanb1 - hour Circuit B Fan#1 Hours Operating hours, fan 1, circuit B20 st_fanb1 - - Circuit BFan #1 Starts Number of starts, fan 1, circuit B21 nb_def_a - -Circuit A Defrost Number Defrost session number, circuit A22nb_def_b - - Circuit B Defrost Number Defrost session number,circuit B

    *Depends on the selected language (English by default).

    DC Free Cooling Status Menu FCOOL_ST

    Point name Status Unit Displayed text* Description1 fc_oat 0 to0 C / F Free Cooling OAT Free Cooling OAT (see section 8.10)2fc_lwt 0 to 0 C / F FC Leaving Water Temp Free Cooling LWT3fc_wloop 0 to 0 C / F FC Water Loop Temp Free Cooling water looptemperature4 m_fcool no/yes - Free Cooling Mode Active Free Coolingmode status5 fc_cap 0 to 100 % FC Capacity Capacity in Free Coolingmode6 fc_fanst 0 to 7 - FC Fan Stage Number of fan stages in FreeCooling7 FC_HOUR 0 to 999999 hour FC Operating Hours Free Coolingrunning time8 FC_FAN1S 0 to 999999 - FC Fan Stage 1 Start Number ofstarts, FC fan stage 19 FC_FAN1H 0 to 999999 - FC Fan Stage 1 HoursOperating hours, FC fan stage 110 FC_FAN2S 0 to 999999 - FC FanStage 2 Start Number of starts, FC fan stage 211 FC_FAN2H 0 to999999 - FC Fan Stage 2 Hours Operating hours, FC fan stage 212FC_FAN3S 0 to 999999 - FC Fan Stage 3 Start Number of starts, FCfan stage 313 FC_FAN3H 0 to 999999 - FC Fan Stage 3 Hours Operatinghours, FC fan stage 314 FC_FAN4S 0 to 999999 - FC Fan Stage 4 StartNumber of starts, FC fan stage 415 FC_FAN4H 0 to 999999 - FC FanStage 4 Hours Operating hours, FC fan stage 416 FC_FAN5S 0 to999999 - FC Fan Stage 5 Start Number of starts, FC fan stage 517FC_FAN5H 0 to 999999 - FC Fan Stage 5 Hours Operating hours, FC fanstage 518 FC_FAN6S 0 to 999999 - FC Fan Stage 6 Start Number ofstarts, FC fan stage 619 FC_FAN6H 0 to 999999 - FC Fan Stage 6Hours Operating hours, FC fan stage 620 FC_FAN7S 0 to 999999 - FCFan Stage 7 Start Number of starts, FC fan stage 721 FC_FAN7H 0 to999999 - FC Fan Stage 7 Hours Operating hours, FC fan stage 7

    *Depends on the selected language (English by default).

    Modes Menu MODES

    Point name Status Unit Displayed text* Description1 m_delayno/yes - Delay Active Delay active (when switching between modes)2m_2ndspt no/yes - Second Setpoint Active Second setpoint active(during unoccupied periods)3 m_reset no/yes - Reset Active Reset isactive4 m_limit no/yes - Demand Limit Active Demand limit active5m_ramp no/yes - Ramp Loading Active Ramp loading active6 m_coolerno/yes - Cooler Heater Active Water exchanger heater active7m_pmprot no/yes - Pump Rot Active Pump rotation active8 m_pmpperno/yes - Pump Per Active Periodical pump start active 9 m_nightno/yes - Night Low Noise Active Night low noise mode active10 m_SMno/yes - System Manager Active System Manager active11 m_leadlano/yes - Master Slave Active Master/Slave active12 m_auto no/yes -Auto Changeover Active Auto changeover active13 m_heater no/yes -Electric Heat Active Electric heating active14 m_lo_ewt no/yes -Heating Low EWT Lockout Heating low EWT lockout15 m_boiler no/yes -Boiler Active Boiler active16 m_ice no/yes - Ice Mode Active Icemode active17 m_defr_a no/yes - Defrost Active On Cir A Defrostactive, circuit A18 m_defr_b no/yes - Defrost Active On Cir BDefrost active, circuit B19 m_sst_a no/yes - Low Suction Circuit ALow suction temperature, circuit A20 m_sst_b no/yes - Low SuctionCircuit B Low suction temperature, circuit B21 m_dgt_a no/yes -High DGT Circuit A High discharge gas temperature, circuit A22m_dgt_b no/yes - High DGT Circuit B High discharge gas temperature,circuit B23 m_hp_a no/yes - High Pres Override Cir A High pressureoverride, circuit A24 m_hp_b no/yes - High Pres Override Cir B Highpressure override, circuit B25 m_sh_a no/yes - Low SuperHeatCircuit A Low superheat, circuit A26 m_sh_b no/yes - Low SuperHeatCircuit B Low superheat, circuit B

    *Depends on the selected language (English by default).

  • 20

    Setpoint Menu SETPOINT

    Point name Status Default Unit Displayed text* Description1 csp1-28.9 to 20.0

    -20.0 to 68.07.044.6

    CF

    Cooling Setpoint 1 Cooling setpoint 1

    2 csp2 -28.9 to 20.0 -20.0 to 68.0

    7.044.6

    CF

    Cooling Setpoint 2 Cooling setpoint 2

    3 hsp1 25.0 to 55.077.0 to 131.0

    38.0100.4

    CF

    Heating Setpoint 1 Heating setpoint 1

    4 hsp2 25.0 to 55.077.0 to 131.0

    38.0100.4

    CF

    Heating Setpoint 2 Heating setpoint 2

    5 ramp_sp 0.1 to 1.10.2 to 2.0

    0.61.0

    ^C^F

    Ramp Loading Ramp loading

    6 cauto_sp 3.9 to 50.039.0 to 122.0

    23.975.0

    CF

    Cool Changeover Setpt Cool changeover setpoint

    7 hauto_sp 0 to 46.132.0 to 115.0

    17.864.0

    CF

    Heat Changeover Setpt Heat changeover setpoint

    8 lim_sp1 0 to 100 100 % Switch Limit Setpoint 1 Switch limitsetpoint 19 lim_sp2 0 to 100 100 % Switch Limit Setpoint 2 Switchlimit setpoint 210 lim_sp3 0 to 100 100 % Switch Limit Setpoint 3Switch limit setpoint 311 min_sct 26.7 to 60.0

    80.0 to 140.040.0104.0

    CF

    Desuperheater Min Sct Desuperheater minimum saturated condensingtemperature

    *Depends on the selected language (English by default).

    7.2 - Configuration menu (CONFIG)

    Icon Displayed text* Description Name

    General Config General configuration GENCONF

    Pump Configuration Pump configuration PUMPCONF

    Heat/Cool Config Heat/Cool configuration HCCONFIG

    Reset Config Reset configuration RESETCFG

    User Configuration User configuration USERCONF

    Schedule Schedule menu SCHEDULE

    Holiday Holiday menu HOLIDAY

    Broadcast Broadcast menu BROADCAST

    Date/Time Date/time configuration DATETIME

    Control Identification Control identification CTRL_ID

    *Depends on the selected language (English by default).

    CAUTIONSince specific units may not include additional features,some tables may contain parameters that cannot be configured for agiven unit.

  • 21

    General Config Menu GENCONF

    Point name Status Default Unit Displayed text* Description1lead_cir 0 to 2 0 - Cir Priority Sequence Circuit prioritysequence

    0=Auto 1=A Lead 2=B Lead 0 = Automatic changeover1 = Circuit Alead 2 = Circuit B lead

    2 seq_typ no/yes no - Staged Loading Sequence Staged loadingsequence3 ramp_sel no/yes no - Ramp Loading Select Ramp loadingsequence4 off_on_d 1 to 15 1 min Unit Off to On Delay Unit OFF toON delay5 nh_limit 0 to 100 100 % Night Capacity Limit Nightcapacity limitation6 nh_start 00:00 00:00 - Night Mode Start HourNight mode start hour7 nh_end 00:00 00:00 - Night Mode End HourNight mode end hour8 bas_menu 0 to 3 0 - Basic Menu Config Basicmenu configuration

    0 = All Access 0 = All access 1 = no alarm menu 1 = Alarm menu2= no setpoint menu 2 = Setpoint menu unavailable3 = 1 + 2 3 = Alarmand Setpoint menus are unavailable

    *Depends on the selected language (English by default).

    Pump Configuration Menu PUMPCONF

    Point name Status Default Unit Displayed text* Description1pump_seq 0 to 4 0 - Water Pumps Sequence Water pumps sequence

    0 = No Pump 0 = No pump 1 = One Pump Only 1 = One pump only(units with one pump) 2 = Two Pumps Auto 2 = Two pumps automaticcontrol 3 = Pump#1 Manual 3 = Pump 1 selected (units with twopumps) 4 = Pump#2 Manual 4 = Pump 2 selected (units with twopumps)

    2 pump_del 24 to 3000 48 hour Pump Auto Rotation Delay Pumpautomatic rotation delay3 pump_per no/yes no - Pump StickingProtection Pump sticking protection4 pump_sby no/yes no - Stop PumpDuring Standby Pump stopped when the unit is in standby5 pump_locno/yes yes - Flow Checked if Pump Off Water flow is checked whenthe pump is off

    *Depends on the selected language (English by default).

    Heat/Cool Config Menu HCCONFIG

    Point name Status Default Unit Displayed text* Description1auto_sel no/yes no - Auto Changeover Select Heating/Coolingautomatic changeover2 cr_sel 0 to 3 0 - Cooling Reset SelectCooling reset 3 hr_sel 0 to 3 0 - Heating Reset Select Heatingreset

    1=OAT, 0=None2=Delta T 3= Analog (4-20mA)

    0 = No reset1 = Reset based on OAT 2 = Reset based on delta T 3= Reset based on analog input (4-20 mA)

    4 heat_th -20.0 to 0.0-4.0 to 32.0

    -15.05.0

    CF

    Heating OAT Threshold Heating OAT threshold

    5 boil_th -15.0 to 15.05.0 to 59.0

    -9.914.2

    CF

    Boiler OAT Threshold Boiler OAT threshold

    6 ehs_th -5.0 to 21.123.0 to 70.0

    5.041.0

    CF

    Elec Stage OAT Threshold Electric heating stage OATthreshold

    7 both_sel no/yes no - HSM Both Command Select HSM command8ehs_back no/yes no - 1 Elec Stage For Backup Electric heating stagefor back-up9 ehs_pull 0 to 60 0 min Electrical Pulldown TimeElectrical pull-down time: It defines the time

    between starting the unit and determining whether the electricheating stage should be started

    10 ehs_defr no/yes no - Quick EHS For Defrost Quick electricheating used for defrost

    *Depends on the selected language (English by default).

    Reset Config Menu RESETCFG

    Point name Status Default Unit Displayed text* Description1COOLING RESET Cooling reset parameters2 oatcr_no -10.0 to 51.7

    14.0 to 125.0-10.014.0

    CF

    OAT No Reset Value OAT no reset value

    3 oatcr_fu -10.0 to 51.714.0 to 125.0

    -10.014.0

    CF

    OAT Full Reset Value OAT full reset value

    4 dt_cr_no 0 to 13.90 to 25.0

    00

    ^C^F

    Delta T No Reset Value Delta T no reset value

    5 dt_cr_fu 0 to 13.90 to 25.0

    00

    ^C^F

    Delta T Full Reset Value Delta T full reset value

  • 22

    Point name Status Default Unit Displayed text* Description6I_cr_no 0 to 20 0 mA Current No Reset Value Current no reset value7I_cr_fu 0 to 20 0 mA Current Full Reset Value Current full resetvalue8 cr_deg -16.7 to 16.7

    -30.0 to 30.000

    ^C^F

    Cooling Reset Deg. Value Cooling reset deg. value

    9 HEATING RESET Heating reset parameters10 oathr_no -10.0 to51.7

    14.0 to 125.0-10.014.0

    CF OAT No Reset Value OAT no reset value

    11 oathr_fu -10.0 to 51.714.0 to 125.0

    -10.014.0

    CF OAT Full Reset Value OAT full reset value

    12 dt_hr_no 0 to 13.90 to 25.0

    00

    ^C^F Delta T No Reset Value Delta T no reset value

    13 dt_hr_fu 0 to 13.90 to 25.0

    00

    ^C^F Delta T Full Reset Value Delta T full reset value

    14 I_hr_no 0 to 20 0 mA Current No Reset Value Current no resetvalue15 I_hr_fu 0 to 20 0 mA Current Full Reset Value Current fullreset value16 hr_deg -16.7 to 16.7

    -30.0 to 30.000

    ^C^F Heating Reset Deg. Value Heating reset deg. value

    *Depends on the selected language (English by default).

    User Configuration Menu USERCONF

    Point name Status Default Unit Displayed text* Description1use_pass - 11 - User Password The password required to accessUser

    Configuration menu2 alert_r no/yes no - Alarm Relay for Alerts?Alarm relay status. Alarm output relay is used for "alarm" +"alert"

    *Depends on the selected language (English by default).

    Schedule Menu SCHEDULE

    Point name Status Default Unit Displayed text* Description1OCCPC01S - - - OCCPC01S - Schedule Menu Unit on/off time schedule2OCCPC02S - - - OCCPC02S - Schedule Menu Unit setpoint selectiontime schedule

    *Depends on the selected language (English by default).

    Holiday Menu HOLIDAY

    Point name Status Default Unit Displayed text* Description1HOL_MON 0-12 0 - Holiday Start Month Holiday start month2 HOL_DAY0-31 0 - Start Day Holiday start day3 HOL_LEN 0-99 0 - Duration(days) Holiday duration (days)

    *Depends on the selected language (English by default).

    Broadcast Menu BROADCAST (BROCASTS)

    Point name Status Default Unit Displayed text* Description1Ccnbroad 0 to 2 2 Activate Not applicable2 OAT Broadcast3 oatbusnm0 to 239 0 Bus Bus number of the unit with the outdoor

    temperature sensor4 oatlocad 0 to 239 0 Element Element numberof the unit with outdoor

    temperature5 dayl_sel disable/enable disable Daylight SavingsSelect Summer/winter time activation (Daylight

    saving selection)Daylight Savings Select Summer time (entering)61 to 12 3 Month Month7 1 to 7 7 Day of Week (1=Monday) Day of theweek (1 = Monday)8 1 to 5 5 Week Number of Month Week of themonthDaylight Savings Select Winter time (leaving)9 Stopmon 1 to 1210 Month Month10 Stopdow 1 to 7 7 Day of Week (1=Monday) Day of theweek (1 = Monday)11 Stopwom 1 to 5 5 Week Number of Month Week ofthe month

    *Depends on the selected language (English by default).

  • 23

    7.3 - Alarm menu

    Icon Displayed text* Description Menu name

    Reset Alarms Alarm reset ALARMRST

    Current Alarms Current alarms CUR_ALRM

    Alarm History Alarm history ALMHIST1

    *Depends on the selected language (English by default).

    Date/Time Menu DATETIME

    Point name Status Default Unit Displayed text* DescriptionDate(DD/MM/YY)1 d_of_m 1 to 31 - Day of month Day of the month2 month 1to 12 - Month of year Month3 year 0 to 99 - Year Year4 dowMonday-Sunday - Day of Week Day of the weekTime (HH:MM)5 hour 0 to24 hour Hour Hour6 minute 0 to 59 min Minute MinutesDaylight SavingTime7 dlig_on no/yes - Daylight sav. time on Daylight saving timeon/off8 no/yes - Today is a holiday The present day is a holiday9tom_hol no/yes - Tomorrow is a holiday The following day is aholiday

    *Depends on the selected language (English by default).

    Control Identification Menu CTRL_ID

    Point name Status Default Unit Displayed text* Description1elemt_nb 0 to 239 1 CCN Element Number Element number2 Bus_nb 0 to239 0 CCN Bus Number Bus number3 Baudrate 9600/19200/38400 9600 CCNBaud Rate Communication speed

    4 Device description - 30RBSRQS Device Description Device 5Location

    DescriptionLocation Description Location

    6 Software Part Number

    - ECG-SR-20R430-xx Software Part Number Software version

    7 Serial Number - Serial Number Serial number (MAC address)

    *Depends on the selected language (English by default).

  • 24

    8.1 - Unit start/stop control

    The unit state is determined based on a number of factors,including its operating type, active overrides, open contacts,master/slave configuration, or alarms triggered due to operatingconditions.

    The table given below summarizes the unit control type[ctrl_typ] and its running status with regard to the followingparameters:

    Operating type: This operating type is selected using theStart/Stop button on the user interface.LOFF Local offL-C LocalonL-SC Local scheduleRem RemoteNet NetworkMast Master unit

    Start/stop force command [CHIL_S_S]: Chiller start/stop forcecommand can be used to control the chiller state in the Networkmode.

    - Command set to stop: The unit is halted. - Command set tostart: The unit runs in

    accordance with schedule 1. Remote start/stop contact status[Onoff_sw]: Start/

    stop contact status can be used to control the chiller state inthe Remote operating type.

    Master control type [ms_ctrl]: When the unit is the master unitin a two-chiller master/slave arrangement, the master unit may beset to be controlled locally, remotely or via network.

    Start/stop schedule [chil_occ]: Occupied or unoccupied status ofthe unit.

    Network emergency stop command [EMSTOP]: If activated, the unitshuts down regardless of the active operating type.

    General alarm: The unit shuts down due to failure.

    Active operating type Parameter status ResultLOFF L-C L-SC RemNet Mast Start/stop

    force command

    Remote start/stop contact

    Master control type

    Start/stop time schedule

    Network emergency shutdown

    General alarm

    Control type

    Unit state

    - - - - - - - - - - enable - - off- - - - - - - - - - - yes -offactive - - - - - - local off

    active - - - unoccupied - - local offactive - off - - - - remoteoffactive - - - unoccupied - - remote off

    active disable - - - - - network offactive - - - unoccupied - -network off

    active - - local unoccupied - - local offactive - off remote - -- remote offactive - - remote unoccupied - - remote offactivedisable - network - - - network offactive - - network unoccupied -- network off

    active - - - - disable no local onactive - - - occupied disableno local on

    active - on_cool - occupied disable no remote onactive - on_heat- occupied disable no remote onactive - on_auto - occupied disableno remote on

    active enable - - occupied disable no network onactive - - localoccupied disable no local onactive - on_cool remote occupieddisable no remote onactive - on_heat remote occupied disable noremote onactive - on_auto remote occupied disable no remoteonactive enable - network occupied disable no network on

    IMPORTANT: When the unit is stopping or there is a demand tostop the unit, compressors are stopped consecutively.

    8 - STANDARD CONTROL OPERATIONS AND OPTIONS

    In case of emergency stop, all compressors are stopped at thesame time.

  • 25

    8.2 - Heating/Cooling/Standby

    The control determines the heat/cool state of the unit. Chillersfitted with a boiler may operate in cooling or heating mode.Without a boiler, the unit remains in Cooling mode. Heat pumps mayoperate in cooling or heating mode.

    When the chiller is in Heating mode, the control utilises theboiler to satisfy the heating demand. For heat pumps, the boiler isused when mechanical heating is impossible or insufficient.Additionally, when the outside air temperature is very low,electric heaters can be used as a form of supplemental heating.

    When Cooling mode is selected, the unit will operate in theCooling mode and, as a result, the boiler or electric heating willnot be activated.

    If the unit is in Standby mode, it does not cool or heat andcompressors are stopped. The pump is running with no mechanicalcooling or heating unless configured otherwise. The pump may bestopped depending on pumps configuration (pump_sby, PUMPCONF PumpConfiguration).

    Figure 3: Heating /Cooling changeover for heat pumps andchillers fitted with a boiler

    8.2.1 - Operating mode controlThe operating mode, i.e. coolingor heating, is determined based on the following parameters:Control type: Local, Remote or Network. Local heat/cool selection[hc_sel]: Heat/Cool

    selection when the unit is running in Local mode.

    Control type Heat / Cool (Local) Heat / Cool (Remote) Heat /Cool (Network) Outdoor Air Temperature ** Operating modelocal cool- - - coollocal heat - - - heatlocal auto* - - > cauto_sp + 1coollocal auto* - - < hauto_sp -1 heatlocal auto* - - hauto_sp +1 < oat < cauto_sp -1 standbylocal - on_cool - - coollocal -on_heat - - heatlocal - on_auto - > cauto_sp +1 coollocal -on_auto - < hauto_sp - 1 heatremote - on_cool - - coolremote -on_heat - - heatremote - on_auto - > cauto_sp + 1 coolremote -on_auto - < hauto_sp - 1 heatremote - on_auto - hauto_sp + 1<oat < cauto_sp - 1 standbynetwork - - cool - coolnetwork - -heat - heatnetwork - - auto* > cauto_sp + 1 coolnetwork - -auto* < hauto_sp - 1 heatnetwork - - auto* hauto_sp + 1 < oat< cauto_sp - 1 standby

    * If auto changeover has been selected through userconfiguration; otherwise, by default set to cooling.** cauto_sp =cooling changeover setpoint; hauto_sp = heating changeoversetpoint; oat = outdoor air temp.

    Remote heat/cool selection [onsw_cr]: Heat/Cool selection whenthe unit is running in Remote mode.

    Network heat/cool selection [HC_SEL]: Heat/Cool selection whenthe unit is running in Network mode.

    Outdoor air temperature [OAT]: Heat/Cool setpoint selection whenthe automatic changeover has been enabled.

  • 26

    8.3 - Cooling/heating selection

    Cooling/Heating selection applies to chillers with the boilerand heat pumps. Cooling/Heating selection can be controlled invarious ways, depending on the active operating type. By default,the cooling mode is selected.

    Cooling/Heating selection can be determined: Locally at the unitusing the HC_SEL item in the

    GENUNIT menu. Remotely via the heating/cooling selectioncontact, if

    the unit is in the Remote mode. Via a network command if theunit is in the Network

    mode.

    Cooling/Heating mode can be set manually by the user orautomatically by the control. When cooling/heating is automatic,the outdoor air temperature determines the heat/cool/standbychangeover (cauto_sp and hauto_sp, SETPOINT). The automaticchangeover is optional and requires user configuration (HC_SEL,GENUNIT - General Parameters).

    To set cooling / heating / auto changeover1. Navigate to theMain menu.2. Select General Parameters (GENUNIT).3. Set Heat/CoolSelect [HC_SEL].

    Heat/Cool Select [HC_SEL]

    0 Cooling

    1 Heating

    2 Automatic changeover

    To set cool / heat changeover setpoint1. Navigate to the Mainmenu.2. Select Setpoint (SETPOINT).3. Set Cool Changeover Setpt[cauto_sp] or

    Heat Changeover Setpt [hauto_sp].

    Cool Changeover Setpt [cauto_sp]

    3.9 to 50.0C 23.9C

    39.0 to 122.0F 75.0F

    Heat Changeover Setpt [hauto_sp]

    0 to 46.1C 17.8C

    32.0 to 115.0F 64.0F

    8.4 - Supplementary heating

    30RBS units may be fitted with a boiler that allows the unit torun in heating mode if required. The boiler is active only when theunit is in Heating mode.

    30RQS heat pumps may be fitted with a boiler or electricheaters. The boiler is used as heating replacement when mechanicalheating is not possible due to low outside air temperature.Electric heaters can be turned on to satisfy the heating demandwhen mechanical heating is insufficient.

    8.4.1 - Boiler controlBoiler is activated when the outside airtemperature is below the user-configured boiler outdoor temperaturethreshold which is by default set to -10C (14F).

    To set boiler OAT threshold1. Navigate to the Configurationmenu.2. Select Heat/Cool Config (HCCONFIG).3. Set Boiler OATThreshold [boil_th].

    Boiler OAT Threshold [boil_th]

    -15.0 to 15.0C -9.9C

    5.0 to 59.0F 14.2F

    8.4.2 - Electric heating controlElectric heating stages can beactivated as additional heating when OAT is below theuser-configured electric heating OAT threshold which is by defaultset to 5C (41F).

    Electric heating is allowed when: Unit is running at 100%capacity. Electric pull-down time elapsed [ehs_pull]. OAT is belowthe OAT threshold [ehs_th].

    There are four electric heating stages, where the last electricheating stage is used for back-up when the unit is down due to adetected fault.

    To set electric heating OAT threshold1. Navigate to theConfiguration menu.2. Select Heat/Cool Config (HCCONFIG).3. SetElec Stage OAT Threshold [ehs_th].

    Elec Stage OAT Threshold [ehs_th]

    -5.0 to 21.0C 5.0C

    23.0 to 70.0F 41.0F

    IMPORTANT: Electric heating is not allowed when the demand limitis active on the unit.

    8.5 - Pump control

    The control system can manage one or two water exchanger pumps,determining each pump on/off state and its speed. Both pumps cannotrun together. The pump is turned on when this option is configuredand when the unit is running.

    The pump is turned off when the unit is shut down due to analarm, unless the fault is a frost protection error. The pump canbe started in particular operating conditions when the waterexchanger heater is active.

    If the pump has failed and another pump is available, the unitis stopped and started again with the second pump. If there is nopump available, the unit shuts down.

    Configuration options may differ depending on the number andtype of pumps available (single speed pumps or variable speedpumps).

  • 27

    8.5.1 - Variable speed pumps control30RBS chillers and 30RQSheat pumps may be fitted with one or two variable speed pumps.

    Variable speed pumps give the possibility of saving the pumpingenergy cost, providing precise water flow control and improving theoverall performance of the system. The frequency invertercontinuously regulates the flow rate to minimise the pump powerconsumption at full load and part load.

    Water flow management methods are as follows:1) Fixed speedcontrol (the control ensures a constant

    pump speed based on compressor capacity). 2) Water flow controlbased on constant water delta

    pressure (the control continuously acts on the pump speed toensure a constant delta pressure).

    3) Water flow control based on constant delta T on the waterexchanger.

    IMPORTANT: Pump speed configuration can be performed only byCarrier service.

    8.5.2 - Pumps configurationThe control can command internalfixed speed or variable speed pumps as well as customer pumps.Variable speed pumps may also be configured as fixed speed pumps(see also section 8.5.1).

    Basic pump configuration can be performed via the Configurationmenu (PUMPCONF Pump Configuration). Only logged-in users can accessthe menu. The unit must be stopped.

    To set pumps sequence1. Navigate to the Configuration menu.2.Select Pump Configuration (PUMPCONF).3. Set Water Pumps Sequence[pump_seq].

    Water Pumps Sequence [pump_seq]

    0 No Pump

    1 One Pump Only

    2 Two Pumps Auto

    3 Pump#1 Manual

    4 Pump#2 Manual

    8.5.3 - Automatic pump selectionIf two pumps are controlled andthe reversing function has been selected (PUMPCONF PumpConfiguration), the control balances the pump run time to match theconfigured pump changeover delay. If this delay has elapsed, thepump reversing function is activated.

    To set pump automatic rotation delay1. Navigate to theConfiguration menu.2. Select Pump Configuration (PUMPCONF).3. SetPump Rotation Delay [pump_del].

    Pump Rotation Delay [pump_del]

    24 to 3000h 48h

    8.5.4 - Customer pumps configurationUnits fitted with externalpumps may have only fixed speed pumps available. Customer pumps maybe configured as follows:

    Pump available Pumps sequence (PUMPCONF)

    No pump 0 (no pump)

    One single speed pump 1 (one pump only)

    Two single speed pumps 2 (two pumps auto) 3 (pump#1 manual)4(pump#2 manual)

    Units with customer pumps are fitted with the flow switch,allowing for the water flow control. For more information aboutactuators, see Water flow switch in section 4.7.

    8.5.5 - Pumps protectionThe control provides the option toautomatically start the pump each day at 14:00 for 2 seconds whenthe unit is off.

    If the unit is fitted with two pumps, the first pump is startedon even days and the second pump is started on odd days. Startingthe pump periodically for a few seconds extends the lifetime of thepump bearings and the tightness of the pump seal. Periodical pumpquick start can be selected via the Configuration menu (PUMPCONFPump Configuration).

    To set periodical pump quick start1. Navigate to theConfiguration menu.2. Select Pump Configuration (PUMPCONF).3. SetPump Sticking Protection [pump_per].

    Pump Sticking Protection [pump_per]

    No/Yes Yes

    8.6 - Hydronic kit option

    The hydronic kit option allows for continuous monitoring of thewater flow rate (PUMPSTAT Pump Status).

    The hydronic kit provides the option to measure the followingparameters: Inlet and outlet water pressure. Water exchanger flowrate.

    The water flow rate is based on the pressure difference betweenthe inlet and outlet pressures and the pressure drop curves.

    Hydronic kit option with variable speed pumpsFor units withvariable speed pumps, this option allows for the automaticadjustment of the pump speed necessary to maintain the correctwater flow rate. Water flow control can be based on compressorusage, constant delta pressure or constant temperature difference.For more information on variable speed pumps control, see alsosection 8.5.1.

  • 28

    LOCAL OPERATING TYPEHeating/Cooling Setpoint selection (Local)Setpoint switch Schedule 2 status Active setpointCooling sp-1 - -Cooling setpoint 1Cooling sp-2 - - Cooling setpoint 2Cooling auto -occupied Cooling setpoint 1Cooling auto - unoccupied Coolingsetpoint 2Heating sp-1 - - Heating setpoint 1Heating sp-2 - -Heating setpoint 2Heating auto - occupied Heating setpoint 1Heatingauto - unoccupied Heating setpoint 2

    REMOTE OPERATING TYPEHeating/Cooling Setpoint selection (Local)Setpoint switch Schedule 2 status Active setpointCooling - sp1 -Cooling setpoint 1Cooling - sp2 - Cooling setpoint 2Cooling - autooccupied Cooling setpoint 1Cooling - auto unoccupied Coolingsetpoint 2Heating - sp1 - Heating setpoint 1Heating - sp2 - Heatingsetpoint 2Heating - auto occupied Heating setpoint 1Heating - autounoccupied Heating setpoint 2

    NETWORK OPERATING TYPEHeating/Cooling Setpoint selection (Local)Setpoint switch Schedule 2 status Active setpointCooling sp-1 - -Cooling setpoint 1Cooling sp-2 - - Cooling setpoint 2Cooling auto -occupied Cooling setpoint 1Cooling auto - unoccupied Coolingsetpoint 2Cooling auto - - Cooling setpoint 2Heating sp-1 - -Heating setpoint 1Heating sp-2 - - Heating setpoint 2Heating auto -occupied Heating setpoint 1Heating auto - unoccupied Heatingsetpoint 2Heating auto - - Heating setpoint 2

    8.7 - Control point

    The control point represents the water temperature that the unitmust produce. The required capacity can be decreased depending onthe unit load operating conditions. Control point = Active setpoint+ Reset

    The control point is calculated based on the active setpoint andthe reset calculation. The forced value can be used instead of anyother setpoint calculation only when the unit is in the Networkoperating type.

    To verify the control point1. Navigate to the Main menu.2.Select General Parameters (GENUNIT).3. Verify Control Point[CTRL_PNT].

    Control Point [CTRL_PNT]

    -20.0 to 67.0C

    -4.0 to 153.0F

    8.7.1 - Active setpointTwo setpoints can be selected, where thefirst setpoint is used during occupied periods, whereas the secondone is used during unoccupied periods.

    Depending on the current operation type, the active setpoint canbe selected manually via the Main menu on the user interface, withthe volt-free user contacts, with network commands (CCN or BACnet)or automatically with the setpoint time schedule (schedule 2). Thefollowing tables summarise possible selections depending on thecontrol operating type (Local, Remote or Network) and the followingparameters: Heating or Cooling operating mode [HC_SEL]: Heat/

    Cool select (GENUNIT General Parameters). Setpoint selection[SP_SEL]: Setpoint select permits

    selection of the active setpoint if the unit is in the Localoperating type (GENUNIT General Parameters).

    Setpoint switch status [SETP_SW]: Remote Setpoint Switch (INPUTSInputs).

    Occupied state of dual setpoint time schedule [SP_OCC]: Schedulefor setpoint selection.

  • 29

    8.7.2 - ResetReset means the active setpoint is modified so thatless machine capacity is required. In the cooling mode the setpointis increased, whereas in the heating mode it is decreased. Thereset can be based on the following possibilities: OAT that givesthe measure of the load trends for the

    building. Return water temperature (T provides the average

    building load). The reset source and the reset parameters can beconfigured in the Main menu (RESETCFG Reset Config). In response toa change in the reset source (e.g. OAT), the setpoint is normallyreset to optimise unit performance.

    The amount of reset is determined by linear interpolation basedon the following parameters: A reference at which reset is zero (noreset value). A reference at which reset is maximum (full reset

    value). The maximum reset value.

    Reset example in Cooling mode for the space temperature

    LegendA Maximum reset valueB Reference for zero resetC Referencefor maximum resetD Building load

    8.8 - Capacity limitation

    Touch Pilot Junior allows for the constant control of the unitcapacity by setting its maximum allowable capacity.

    Capacity limitation is expressed in percentage, where a limitvalue of 100% means that the unit may run with its full capacity(no limitation is implemented).

    The unit capacity can be limited: By means of user-controlledvolt-free contacts. The

    unit capacity can never exceed the limit setpoint activated bythese contacts.

    By lag limit [LAG_LIM] set by the master unit in themaster/slave assembly. If the unit is not in the Master/Slaveassembly, the lag limit value is equal to 100%.

    By night mode limitation control. The demand limit value in thenight mode is selectable if the value is below the selectedlimit.

    To set limit setpoints1. Navigate to the Main menu.2. SelectSetpoint (SETPOINT).3. Set Switch Limit Setpoint 1 / 2 / 3 [lim_sp1/2/ 3].

    Switch Limit Setpoint 1 / 2 / 3 [lim_sp1 /2 / 3]

    0 to 100% 100%

    To verify lag limit set by the master unit1. Navigate to theMain menu.2. Select General Parameters (GENUNIT).3. Verify LagCapacity Limit Value [LAG_LIM].

    Lag Capacity Limit Value [LAG_LIM]

    0 to 100% 100%

    To set the night mode limit1. Navigate to the Configurationmenu.2. Select General Config (GENCONF).3. Set Night Capacity Limit[nh_limit].

    Night Capacity Limit [nh_limit]

    0 to 100% 100%

    Based on the limit source, the active demand limit value(DEM_LIM) is set to the lowest possible value. DEM_LIM can beforced by Network.

    To verify active demand limit value1. Navigate to the Mainmenu.2. Select General Parameters (GENUNIT).3. Verify Active DemandLimit Val [DEM_LIM].

    Active Demand Limit Val [DEM_LIM]

    0 to 100% -

    8.9 - Capacity control

    The control adjusts the capacity to keep the water exchangertemperature at its setpoint. Compressors are started and stopped ina sequence designed to equalise the number of starts (valueweighted by their operating time).

    8.9.1 - Circuit loading sequenceThis function determines inwhich order the circuit capacity is changed. Compressor loading ismanaged by starting/stopping the compressors. Two types ofsequencing, i.e. balanced and staged loading sequence, areavailable and can be configured by the user via the user interface(GENCONF General Config).

    Balanced loading sequence: The control maintains equal capacitybetween all circuits as the machine loads and unloads. Balancedloading sequence is the default sequence employed by thecontrol.

    Staged loading sequence: The control loads the lead circuitcompletely before the lag circuits are started. When the load isdecreasing, the lag circuit is unloaded first. Staged loadingsequence is active when one of the circuits is shut down due to itsfailure; the circuit is in capacity override mode; or the remainingcircuits are shut down or fully charged.

    20 Reset based on OAT 25 0 Reset based on delta T 3 4 Resetbased on analog input 20

    no_reset selection full_reset

  • 30

    To set the circuit loading sequence1. Navigate to theConfiguration menu.2. Select General Config (GENCONF).3. Set StagedLoading Sequence [seq_typ].

    Staged loading sequence [seq_typ]

    No/Yes No

    8.9.2 - Capacity for multi-circuit unitThe circuit lead/lagfunction determines the lead and lag circuit of the unit. Thisfunction controls the start/stop sequence of two refrigerationcircuits called circuit A and circuit B.

    The circuit authorised to start first is the lead circuit. Leadcircuit is used first for capacity increases and at the same timeshould be decreased first when decreasing capacity. The lead/lagcircuits can be selected manually or automatically (Cir PrioritySequence, GENCONF General Config).

    Manual lead/lag circuit determination: Circuit A or circuit Bselected as the lead circuit. The selected circuit takes priorityover another circuit.

    Automatic lead/lag circuit determination: The control systemdetermines the lead circuit to equalise the operating time of eachcircuit (value weighted by the number of start-ups of eachcircuit). As a result, the circuit with the lowest number ofoperating hours always starts first.

    To set circuit priority1. Navigate to the Configuration menu.2.Select General Config (GENCONF).3. Set Cir Priority Sequence[lead_cir].

    Cir Priority Sequence [lead_cir]

    0 Auto

    1 Circuit A lead

    2 Circuit B lead

    8.10 - Free cooling option

    30RBS chillers and 30RQS heat pumps may be fitted with a drycooler that enables power consumption reduction which amounts toenergy and cost savings (FREE COOLING).

    The installation of a dry cooler allows for free cooling, i.e. amethod of using low outdoor air temperature as an aid to chillingwater that is later used in the air-conditioning system.The systemis the most effective when the outdoor air temperature is below 0C(32F).

    Starting free coolingThe free cooling mode is ENABLED when thefree cooling OAT [fc_oat] is below the water loop temperature andthe start threshold:

    fc_oat < fc_wloop fc_start

    fc_oat: Free Cooling OATfc_wloop: Free Cooling WaterTemperaturefc_start: Free Cooling Start Threshold (service accessonly)

    Note: [fc_wloop] and [fc_oat] temperatures measured by thecontrol are read-only values that can be verified in the DC FreeCooling Status menu (FCOOL_ST).

    To verify Dry Cooler water loop temp.1. Navigate to the Mainmenu.

    2. Select DC Free Cooling Status (FCOOL_ST).3. Verify FC WaterLoop Temp [fc_wloop].

    FC Water Loop Temp [fc_wloop]

    C / F

    To verify Free Cooling OAT1. Navigate to the Main menu.

    2. Select DC Free Cooling Status (FCOOL_ST).3. Verify FreeCooling OAT [fc_oat].

    Free Cooling OAT [fc_oat]

    C / F

    Stopping free coolingIf it turns out that the cooling power ofthe dry cooler is not enough in order to reach the coolingsetpoint, then the mechanical cooling will be started.

    Free Cooling is normally stopped when the free cooling OAT[fc_oat] is above the water loop temperature and the start/stopthreshold:

    fc_oat > fc_wloop - fc_start + fc_stop

    fc_oat: Free Cooling OATfc_wloop: Free Cooling WaterTemperaturefc_start: Free Cooling

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