Sterling 30RA010-055 manual B — Configuring Return Temperature Reset

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Table 26B — Configuring Return Temperature Reset

Table 26A — Configuring Outdoor Air and Space Temperature Reset

MODE

KEYPAD

SUB-

KEYPAD

 

DISPLAY

ITEM

 

ITEM

Outdoor

 

COMMENT

(RED LED)

ENTRY

MODE

ENTRY

Space

EXPANSION

 

 

 

 

 

 

 

Air

 

 

 

 

ENTER

DISP

 

 

 

 

 

 

 

 

UNIT

 

 

 

 

 

 

 

 

OPT1

 

 

 

 

 

 

 

 

OPT2

 

 

 

 

 

 

CONFIGURATION

 

 

ENTER

 

 

 

COOLING RESET

2 = Outdoor-Air Temperature

 

RSET

CRST

2

4

4 = Space Temperature

 

 

 

 

 

 

 

 

 

TYPE

(Connect to TB5-5,6)

 

 

 

 

 

 

 

 

 

 

 

 

RM.NO*

85 °F

72 °F

REMOTE - NO

Default: 125.0 F (51.7 C)

 

 

 

 

RESET TEMP

Range: 0° to125 F

 

 

 

 

 

 

 

 

 

 

 

RM.F

55 °F

68 °F

REMOTE - FULL

Default: 0.0° F (-17.7 C)

 

 

 

 

RESET TEMP

Range: 0° to 125 F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REMOTE - DEGREES

Default: 0° F (0° C)

 

 

 

 

RM.DG

15 °F

6 °F

Range: –30 to 30 F

 

 

 

 

RESET

 

 

 

 

 

 

 

(–34.4 to -1.1 °C)

 

 

 

 

 

 

 

 

*4 items skipped in this example.

Table 26B — Configuring Return Temperature Reset

MODE

KEYPAD

SUB-MODE

KEYPAD

ITEM

DISPLAY

ITEM

 

COMMENT

(RED LED)

ENTRY

 

ENTRY

 

 

EXPANSION

 

 

 

ENTER

DISP

ENTER

TEST

ON/OFF

TEST DISPLAY LEDs

 

 

 

 

UNIT

ENTER

TYPE

X

UNIT TYPE

 

 

 

 

OPT1

ENTER

FLUD

X

COOLER FLUID

 

 

 

 

OPT2

ENTER

CTRL

X

CONTROL METHOD

 

 

 

 

 

ENTER

 

 

 

0

= No Reset

 

 

 

 

 

 

1

= 4 to 20 mA Input (EMM required)

 

 

 

 

 

 

 

CONFIGURATION

 

RSET

 

CRST

X

COOLING RESET TYPE

2

(Connect to EMM TB6-2,3)

 

 

 

= Outdoor-Air Temperature

 

 

 

 

 

 

 

3

= Return Fluid

 

 

 

 

 

 

 

4

= Space Temperature

 

 

 

 

 

 

 

 

(Connect to TB5-5,6)

 

 

 

 

RT.NO*

XXX.X ∆F

RETURN FLUID - NO

Default: 10.0 ∆F (5.6 ∆C)

 

 

 

 

RESET TEMP

Range: 0° to125 F COOLER ∆T

 

 

 

 

 

 

 

 

 

 

RT.F

XXX.X ∆F

RETURN FLUID - FULL

Default: 0 ∆F (–17.8 ∆C)

 

 

 

 

RESET TEMP

Range: 0° to 125 F COOLER ∆T

 

 

 

 

 

 

 

 

 

 

RT.DG

XX.X ∆F

RETURN - DEGREES

Default: 0 ∆F (0 ∆C)

 

 

 

 

RESET

Range: –30 to 30°F (–16.7 to 16.7 C)

 

 

 

 

 

 

*4 items skipped in this example.

Temperature Reset — The control system is capable of handling leaving-fluid temperature reset based on return cooler fluid temperature. Because the change in temperature through the cooler is a measure of the building load, the return tempera- ture reset is in effect an average building load reset method. The control system is also capable of temperature reset based on outdoor-air temperature (OAT), space temperature (SPT), or from an externally powered 4 to 20 mA signal. Accessory sen- sors must be used for SPT reset (33ZCT55SPT). The Energy Management Module (EMM) must be used for temperature reset using a 4 to 20 mA signal. See Tables 25A and 25B.

IMPORTANT: Care should be taken when interfacing with other control systems due to possible power supply differ- ences: full wave bridge versus half wave rectification. Con- nection of control devices with different power supplies may result in permanent damage. ComfortLink™ controls incorporate power supplies with half wave rectification. A signal isolation device should be utilized if the signal gen- erator incorporates a full wave bridge rectifier.

To use Outdoor Air or Space Temperature reset, four vari- ables must be configured. In the Configuration mode under the sub-mode RSET, items CRST, RM.NO, RM.F and RT.DG must be properly set. See Table 26A — Configuring Outdoor Air and Space Temperature Reset. The outdoor air reset exam- ple provides 0° F (0° C) chilled water set point reset at 85.0 F (29.4 C) outdoor-air temperature and 15.0 F (8.3 C) reset at

55.0F (12.8 C) outdoor-air temperature. The space tempera- ture reset example provides 0° F (0° C) chilled water set point reset at 72.0 F (22.2 C) space temperature and 6.0 F (3.3 C) reset at 68.0 F (20.0 C) space temperature. The variable CRST should be configured for the type of reset desired. The variable RM.NO should be set to the temperature that no reset should occur. The variable RM.F should be set to the temperature that maximum reset is to occur. The variable RM.DG should be set to the maximum amount of reset desired.

To use Return reset, four variables must be configured. In the Configuration mode under the sub-mode RSET, items CRST, RT.NO, RT.F and RT.DG must be properly set. See Table 26B — Configuring Return Temperature Reset. This ex- ample provides 5.0 F (2.8 C) chilled water set point reset at

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Contents SAFETY CONSIDERATIONS GENERAL CONTENTSTable 1 — Unit Sizes MAJOR SYSTEM COMPONENTSControl Module Communication Sterlco Comfort Network SCN Interface —Table 4 - Output Relays Table 3 — Status SwitchesTable 5 - SCN Communication Bus Wiring Table 2 — Thermistor DesignationsLEGEND FOR FIG. Page Page 30RA010-018AQUA SNAP Fig. 3 — Wiring Schematic 30RA010-018Fig. 3 - Wiring Schematic 30RA010-018cont AQUA-SNAPLOW VOLTAGE CONTROL SCHEMATICSEE NOTE SEE NOTE 30RA022-030AQUA SNAP Fig. 4 - Wiring Schematic 30RA022-030AQUA-SNAPLOW VOLTAGE CONTROL SCHEMATIC Fig. 4 - Wiring Schematic 30RA022-030cont30RA032-040AQUA SNAP Fig. 5 — Wiring Schematic 30RA032-040AQUA-SNAPLOW VOLTAGE CONTROL SCHEMATIC Fig. 5 — Wiring Schematic 30RA032-040cont30RA042-055AQUA SNAP Fig. 6 — Wiring Schematic 30RA042-055AQUA-SNAPLOW VOLTAGE CONTROL SCHEMATIC Fig. 6 — Wiring Schematic 30RA042-055contMODE Fig. 7 — Main Base BoardESCAPEENTER REMOTE CONTACT SW1 OFF ENABLE OFF SW2 ONFig. 9 — Typical Space Temperature Sensor Wiring CEPL130351 Fig. 11 - Energy Management Module100/100 Fig. 12 — Deadband Multiplier R-22Maneurop Compressor Fig. 13 — Operating Envelope forFig. 14 — 30RA Condenser Fan Sequence Cooling Set Point Select Fig. 16 — Scrolling Marquee Display Service Test See Table 11 — Both main powerand control circuit power must be on Table 8 — Control Methods and Cooling Set PointsOptional Factory-InstalledHydronic Package — •Cooler Pump Control CPC Configuration, OPT1 ON Table 9 — Marquee Display Menu Structure Fig. 17 — Dual Chiller Thermistor LocationTable 10 — Run Status Mode and Sub-ModeDirectory SUB-MODE Table 12 - Temperature Mode and Sub-ModeDirectory Table 14 — Set Point and Sub-ModeDirectory Table 13 — Pressure Mode and Sub-ModeDirectoryTable 15 — Inputs Mode and Sub-ModeDirectory DISPLAY Table 16 — Outputs Mode and Sub-ModeDirectorySUB-MODE KEYPADDISPLAY SUB-MODEKEYPAD ITEMDISPLAY SUB-MODEKEYPAD ITEMTable 18 — Time Clock Mode and Sub-ModeDirectory PER.3 SUB-MODE Table 19 — Operating Mode and Sub-ModeDirectory Table 20 — Alarms Mode and Sub-ModeDirectoryDISPLAY SUB-MODEITEM KEYPAD ENTRYRSET DISP Table 23 — Operating Modes Table 25A — 4-20mA Reset Table 24 — Example of Reading and Clearing AlarmsTable 26B — Configuring Return Temperature Reset Fig. 20 — Space Temperature Reset Fig. 18 — Standard Chilled FluidTemperature Control — No Reset Fig. 19 — Outdoor-AirTemperature ResetFig. 21B — Cooling Set Point 4 to 20 mA Fig. 21A — 4- to 20-mADemand LimitingTable 27 — Configuring Demand Limit TROUBLESHOOTINGRecommended that system be filled with an appro Table 28 — Troubleshootingand fluid tubing FU — Fuse GND — Ground Fig. 22 — Component Arrangement — 30RA010-030FU — Fuse GND — Ground Fig. 23 — Component Arrangement — 30RA032-040FU — Fuse GND — Ground Fig. 24 — Component Arrangement — 30RA042-055NOTES LEGEND Table 29 — Alarm and Alert Codes Table 29 - Alarm and Alert Codes cont ALARM Table 29 — Alarm and Alert Codes contALARM Table 29 — Alarm and Alert Codes contALARM Table 29 — Alarm and Alert Codes contElectronic Components SERVICECompressor Replacement Refer to Fig Table 30 - Unit Torque SpecificationFig. 30 — Compressor Location — 30RA032-055 Fig. 28 — Compressor WiringFig. 27 — Typical Compressor Mounting — All Sizes Fig. 29 — Compressor Location — 30RA010-030Table 31 - Oil Charge Condenser Section and CoilsFig. 33 — Condenser-FanPosition Standard Fan Fig. 31 — 30RA Access PanelsCheck Refrigerant Feed Components Fig. 32 — Condenser-FanMountingCheck Unit Safeties Table 32 — Factory Settings, High-PressureSwitch Fixed Compressor and Unit Protective DevicesCOOLER FREEZE-UPPROTECTION TEMP TEMP For Thermistor T10 For Thermistor T10 Fig. 35 — Fluid-SideTemperature Sensors T1 and T2 Main Base Board, J8 ConnectorFig. 36 — Thermistor Connections to PROGRAMMING Mode •P50: FAULT HISTORY — Last 8 faults Table 37 - Fault Codes•P51: SOFTWARE version PARAMETERS Table 39 — Replacement Modules System Check MAINTENANCEMinimum Loop Volume PRE-START-UPOperating Limitations Table 41 — Temperature Limits for OPERATION SEQUENCEStandard 30RA Units CIRCA_AN Circuit A Analog Parameters APPENDIX ASCN Tables A_UNIT General Unit Parameters CIRCADIO Circuit A Discrete Inputs/OutputsCIRCB_AN Circuit B Analog Parameters CIRCBDIO Circuit B Discrete Inputs/OutputsOPTIONS Unit Parameters BRODEFS Broadcast POC Definition Table ALARMDEF Alarm Definition TableDISPLAY Marquee Display SETUP DUALCHIL Dual Chiller Configuration SettingsOPTIONS2 Options 2 Configuration OPTIONS1 Options 1 ConfigurationRESETCON Temperature Reset and Demand Limit SCHEDOVR Timed Override SetupSETPOINT UNIT ALARMS: Maintenance DisplayMAINTENANCE DUALCHIL: Maintenance Display CURRMODS: Maintenance DisplayLOADFACT: Maintenance Display LEARNFNS Maintenance DisplayPM-PUMP:Maintenance Display PM-COIL:Maintenance DisplayPM-STRN Maintenance Display RUNTEST: Maintenance Display TESTMODE: Maintenance Display STRTHOUR Maintenance DisplayVERSIONS: Maintenance Display WSMDEFME: Maintenance Display APPENDIX B FACTORY SETTINGS FOR COMPRESSOR, FAN, PUMPAND MANUAL STARTERS FACTORY SETTINGS FOR COMPRESSOR, FAN, PUMP AND MANUAL STARTERS contDataPort, DataLink, BAClink Object Definition APPENDIX CSETPOINT OPTIONSDesign Information START-UPCHECKLIST FOR 30RA LIQUID CHILLERRemove and use for Job File I.Project Information II. Preliminary Equipment CheckStart and Operate Machine. Complete the Following III. Unit Start-UpCL-3 COMMENTS Record Software Versions MODE — RUN STATUSCL-4 OPTIONS1 Options Configuration UNIT Configuration SettingsIII.Unit Start-Upcont CL-6 OPTIONS2 Options ConfigurationRSET Reset Configuration Settings III.Unit Start-UpcontCL-7 SLCT Setpoint and Ramp Load ConfigurationIII.Unit Start-Upcont SETPOINTIII.Unit Start-Upcont Service Test Mode and Sub-ModeDirectory
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