Sterling 30RA010-055 Operating Envelope for, R-22Maneurop Compressor, 30RA Condenser Fan Sequence

Page 21
Fig. 13 — Operating Envelope for

Head Pressure Control — The Main Base Board (MBB) controls the condenser fans to maintain the lowest condensing temperature possible, and thus the highest unit efficiency. The MBB uses the saturated condensing tempera- ture input from the discharge pressure transducer to control the fans. Head pressure control is maintained through a calculated set point which is automatically adjusted based on actual

 

160

 

 

 

 

 

 

 

149

 

 

154

 

 

 

 

 

 

 

 

 

 

 

 

140

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120

 

 

 

 

 

 

 

 

 

 

 

 

 

(F)

105

 

 

 

 

 

 

 

 

 

 

 

 

SCT

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

 

 

 

78

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

47.5

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

0

5

10

15

20

 

 

35

40

45

50

55

 

-10

-5

25

30

 

 

 

 

 

 

R-22 SST (F)

 

 

 

 

 

 

LEGEND

SCT — Saturated Condensing Temperature

SST — Saturated Suction Temperature

Fig. 13 — Operating Envelope for

R-22 Maneurop Compressor

saturated condensing and saturated suction temperatures so that the compressor(s) is (are) always operating within the manufacturer's specified envelope (see Fig. 13). The control will automatically reduce the unit capacity as the saturated condensing temperature approaches an upper limit. The control will indicate through an alert that a high ambient unloading mode is in effect. If the saturated condensing temperature in a circuit exceeds the calculated maximum, the circuit will be stopped. For these reasons, there are no head pressure control methods or set points to enter. If the saturated condensing temperature in a circuit is greater than or equal to 95 F (35 C) at start-up, all available condenser fans will be started to prevent excessive discharge pressure during pull-down. The control will turn off a fan stage when the condensing temperature has been below the calculated head pressure set point by 35 F (19.4 C) for more than 2 minutes. Fan sequences are shown in Fig. 14.

MOTORMASTER® V OPTION — For low-ambient opera- tion, the lead fan on a circuit can be equipped with the Motormaster V head pressure controller option or accessory. The control will automatically raise the head pressure set point by 5 F (2.8 C) when Motormaster control is configured. The controller is energized with the first fan stage and adjusts fan speed to maintain a liquid pressure of 135 psig (931 kPa). For sizes 010-018 and Circuit B of sizes 032-040, the two-speed fan is wired for high speed operation and the Motormaster V controller adjusts fan speed. For size 022-030, 042-055 and circuit A of the 032-040 sizes, the lead fan (A1 or B1) in the circuit is controlled. Refer to Fig. 14 for condenser fan staging information. Refer to Fig. 15 for typical pressure transducer location.

FAN ARRANGEMENT

FAN NO.

FAN RELAY

NORMAL CONTROL

 

30RAN010-018

 

 

 

1

FC-LS

Energize Fan at

CONTROL

 

 

 

 

 

Low Speed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOX

 

 

 

 

 

1

 

 

1

FC-HS

Energize Fan at

END

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High Speed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30RAN022-030

 

 

 

1

FC-A1

First Stage

CONTROL

 

 

 

 

 

 

 

Condenser Fan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOX

 

 

1

2

 

 

2

FC-A2

Second Stage

END

 

 

 

 

 

 

 

 

 

 

 

 

Condenser Fan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30RAN032-040

 

 

 

1

FC-A1

On with Compressor A1

 

 

 

 

and/or Compressor A2

CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

FC-A2

First Stage Condenser

BOX

 

 

1

2

 

 

 

 

 

 

Fan, Circuit A

END

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

FC-LS

Low Speed, Fan on

 

 

 

3

 

 

 

w/Compressor B1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

FC-HS

Energize Fan at High Speed,

 

 

 

 

 

 

 

 

 

Circuit B

 

 

 

 

 

 

 

 

 

 

 

 

30RAN042-055

 

 

 

1

FC-A1

On with Compressor A1

 

 

 

 

and/or Compressor A2

CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

FC-A2

First Stage Condenser Fan,

BOX

 

 

 

 

 

 

 

 

 

 

1

2

 

 

Circuit A

END

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

FC-B1

On with Compressor B1

 

 

 

 

 

 

 

 

 

 

 

 

3

4

 

 

and/or Compressor B2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

FC-B2

First Stage Condenser Fan,

 

 

 

 

 

 

 

 

 

Circuit B

 

 

 

 

 

 

 

 

 

 

 

Fig. 14 — 30RA Condenser Fan Sequence

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Contents SAFETY CONSIDERATIONS GENERAL CONTENTSControl Module Communication MAJOR SYSTEM COMPONENTSSterlco Comfort Network SCN Interface — Table 1 — Unit SizesTable 5 - SCN Communication Bus Wiring Table 3 — Status SwitchesTable 2 — Thermistor Designations Table 4 - Output RelaysLEGEND FOR FIG. Page Page 30RA010-018AQUA SNAP Fig. 3 — Wiring Schematic 30RA010-018AQUA-SNAPLOW VOLTAGE CONTROL SCHEMATIC Fig. 3 - Wiring Schematic 30RA010-018contSEE 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 30RA042-055contESCAPEENTER Fig. 7 — Main Base BoardREMOTE CONTACT SW1 OFF ENABLE OFF SW2 ON MODEFig. 9 — Typical Space Temperature Sensor Wiring CEPL130351 Fig. 11 - Energy Management Module100/100 Fig. 12 — Deadband Multiplier Fig. 13 — Operating Envelope for R-22Maneurop CompressorFig. 14 — 30RA Condenser Fan Sequence Cooling Set Point Select and control circuit power must be on Service Test See Table 11 — Both main powerTable 8 — Control Methods and Cooling Set Points Fig. 16 — Scrolling Marquee DisplayOptional 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 13 — Pressure Mode and Sub-ModeDirectory Table 14 — Set Point and Sub-ModeDirectoryTable 15 — Inputs Mode and Sub-ModeDirectory SUB-MODE Table 16 — Outputs Mode and Sub-ModeDirectoryKEYPAD DISPLAYKEYPAD SUB-MODEITEM DISPLAYKEYPAD SUB-MODEITEM DISPLAYTable 18 — Time Clock Mode and Sub-ModeDirectory PER.3 SUB-MODE Table 19 — Operating Mode and Sub-ModeDirectory Table 20 — Alarms Mode and Sub-ModeDirectoryITEM SUB-MODEKEYPAD ENTRY DISPLAYRSET DISP Table 23 — Operating Modes Table 25A — 4-20mA Reset Table 24 — Example of Reading and Clearing AlarmsTable 26B — Configuring Return Temperature Reset Temperature Control — No Reset Fig. 18 — Standard Chilled FluidFig. 19 — Outdoor-AirTemperature Reset Fig. 20 — Space Temperature ResetFig. 21B — Cooling Set Point 4 to 20 mA Fig. 21A — 4- to 20-mADemand LimitingTable 27 — Configuring Demand Limit TROUBLESHOOTINGTable 28 — Troubleshooting Recommended that system be filled with an approand 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 contCompressor Replacement Refer to Fig SERVICETable 30 - Unit Torque Specification Electronic ComponentsFig. 27 — Typical Compressor Mounting — All Sizes Fig. 28 — Compressor WiringFig. 29 — Compressor Location — 30RA010-030 Fig. 30 — Compressor Location — 30RA032-055Table 31 - Oil Charge Condenser Section and CoilsCheck Refrigerant Feed Components Fig. 31 — 30RA Access PanelsFig. 32 — Condenser-FanMounting Fig. 33 — Condenser-FanPosition Standard FanSwitch Fixed Table 32 — Factory Settings, High-PressureCompressor and Unit Protective Devices Check Unit SafetiesCOOLER FREEZE-UPPROTECTION TEMP TEMP For Thermistor T10 For Thermistor T10 Main Base Board, J8 Connector Fig. 35 — Fluid-SideTemperature Sensors T1 and T2Fig. 36 — Thermistor Connections to PROGRAMMING Mode Table 37 - Fault Codes •P50: FAULT HISTORY — Last 8 faults•P51: SOFTWARE version PARAMETERS Table 39 — Replacement Modules Minimum Loop Volume MAINTENANCEPRE-START-UP System CheckOperating Limitations OPERATION SEQUENCE Table 41 — Temperature Limits forStandard 30RA Units SCN Tables A_UNIT General Unit Parameters APPENDIX ACIRCADIO Circuit A Discrete Inputs/Outputs CIRCA_AN Circuit A Analog ParametersCIRCBDIO Circuit B Discrete Inputs/Outputs CIRCB_AN Circuit B Analog ParametersOPTIONS Unit Parameters DISPLAY Marquee Display SETUP ALARMDEF Alarm Definition TableDUALCHIL Dual Chiller Configuration Settings BRODEFS Broadcast POC Definition TableOPTIONS2 Options 2 Configuration OPTIONS1 Options 1 ConfigurationSCHEDOVR Timed Override Setup RESETCON Temperature Reset and Demand LimitSETPOINT ALARMS: Maintenance Display UNITMAINTENANCE DUALCHIL: Maintenance Display CURRMODS: Maintenance DisplayLOADFACT: Maintenance Display LEARNFNS Maintenance DisplayPM-COIL:Maintenance Display PM-PUMP:Maintenance DisplayPM-STRN Maintenance Display RUNTEST: Maintenance Display STRTHOUR Maintenance Display TESTMODE: Maintenance DisplayVERSIONS: Maintenance Display WSMDEFME: Maintenance Display FACTORY SETTINGS FOR COMPRESSOR, FAN, PUMP APPENDIX BAND MANUAL STARTERS FACTORY SETTINGS FOR COMPRESSOR, FAN, PUMP AND MANUAL STARTERS contDataPort, DataLink, BAClink Object Definition APPENDIX CSETPOINT OPTIONSRemove and use for Job File I.Project Information START-UPCHECKLIST FOR 30RA LIQUID CHILLERII. Preliminary Equipment Check Design InformationStart and Operate Machine. Complete the Following III. Unit Start-UpCL-3 Record Software Versions MODE — RUN STATUS COMMENTSCL-4 UNIT Configuration Settings OPTIONS1 Options ConfigurationIII.Unit Start-Upcont RSET Reset Configuration Settings OPTIONS2 Options ConfigurationIII.Unit Start-Upcont CL-6III.Unit Start-Upcont SLCT Setpoint and Ramp Load ConfigurationSETPOINT CL-7III.Unit Start-Upcont Service Test Mode and Sub-ModeDirectory
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