Carrier 040-420 specifications Standard and Accessory Unloaders, 1NO. of Accessory

Page 68

ACCESSORY UNLOADER INSTALLATION

Some of the 30G FlotronicT” II units come standard with unloader(s), and many permit additional unloader(s) to be added if desired. See Table 18.

IMPORTANT: Accessory hot gas bypass cannot be installed with accessory unloaders on units with more than 4 compressors.

If accessory unloaders are desired, an accessory unloader package is used. Package includes a suction cutoff unloader head package. The 24-v coil in the package can be used for 040-l 10, 130 (60 Hz) and associated modular units. A 115 v or 230 v coil must be used for 130 (50 Hz), 150-210, 225, 250, 280, and associated modular units. Coil voltage depends on control circuit voltage, Consult current Carrier price pages for appropriate part numbers.

NOTE: The accessory package will include all necessary

components and wiring with the following exceptions: The field must provide screws, and on the 130-2 10, 225, 250, 280, and associated modular units, the field must also sup- ply a 20 vdc (part number HK356ABOOl) unloader relay and wire (90” C or equivalent).

Table 18 - Standard and Accessory Unloaders

I

 

1NO. OF ACCESSORY

 

 

 

Circuit

A

 

Circuit B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

1 or2

 

 

 

 

 

 

 

 

 

 

1

 

 

1

30GN190-210*

0

 

1

 

 

1

 

 

 

 

 

 

 

3OGT225,250,280

0

 

1

 

 

1

 

 

 

 

 

 

 

*And associated modular units

Installation

1 . Be sure all electrical disconnects are open and tagged before any work begins. Inspect the package contents for any damage during shipping. File a claim with the shipper if damage has occurred.

2.For ease of installation, factory-supplied wiring for the additional unloader is provided in the compressor harness.

3.

Install the additional unloader cylinder head on the lead

 

compressor, Al or El, according to instructions pro-

 

vided by the compressor manufacturer in the accessory

 

package.

4.

Continue installation per either 040-l 10, 130 (60 Hz)

1

units or 130 (50 Hz), 150-210, 225, 250, and 280 units

section as appropriate.

 

0 4-0-l 10, 130 (60 Hz) UNITS (and associated modular units)

1 . Wire the solenoid before any field wiring begins. Wir- ing between components and control box must be en- closed in conduit. All local electrical codes and National Electrical Code (NEC) must be followed. Factory wires are provided in the compressor harness to connect the solenoid. These wires are in the compressor control box.

2.Wire the control side. Open the left side control box door and remove inner panel. Using the holes provided and field-supplied screws, install field-supplied trans- former above the DSIO-LV on the control panel.

Wire the primary side of the transformer in parallel with TRAN3. See Fig. 23. This supplies transformer with proper line voltage. Be sure to connect proper tap of the trans- former to ensure supply of proper secondary voltage.

Wire the secondary side of transformer to DSIO-LV - J5-9, and a jumper from DSIO-LV - J5-9 to DSIO-LV - 54-9. Wire the secondary common to TB7-2. Connect the transformer ground to ground hole supplied near the transformer. These connections provide DSIO with nec- essary power to energize the solenoid coils.

3.When all connections are made, check for proper wiring and tight connections. Replace and secure inner panel. Restore power to unit.

4.Configure the processor. With the addition of extra un- loaders, the unit configuration has changed. To change the configuration of the processor, enter the service func- tion using the keypad and display module. Before any changes can be made, the LOCAL/ENABLE-STOP- CCN switch must be in the STOP position, and the ser- vicer must log on to the processor.

a.

Press pJl,,,l* Keypad

LCD displays the

word

 

 

 

 

 

 

 

PASSWORD.

 

 

b,

Enter md riim ms [;;;;;I

. p K e y pl a d LCDa y

s

 

 

 

 

 

 

LOGGEDON.

 

 

C.To change configuration, press m H. Keypad LCD displays FLD CFG.

d. If an additional unloader was added to compressor Al, press m until NULA 1 appears in keypad dis-

play. Press mf o r Fit h e n u m b e r o f u n l o a d e r s o n circuit A. Keypad display now reads NULA 2.

If an additional unloader was added to compressor B 1, press q until NULB 1 appears in keypad dis-

play. Press m bi for the number of unloaders on circuit B. Keypad display now reads NULB 2.

When configuration is complete, press mM. Key- pad display reads LOGGEDON. Press m until key-

pad display reads LOG OFF. Press H . Keypad dis-

play reads EXIT LOG.

III

5.Using test function, check unloaders. Press 12 1pEsTI. Key- pad display reads OUTPUTS. Press I)I until display

reads ULA 2 OFF. Press q . Relay energizes. Press a and relay deenergizes. Press Li_] until display reads

ULB2 OFF. Press H . Relay energizes. Press q and relay deenergizes.

6. When unloader check has been performed, return LOCAL/ ENABLE-STOP-CCN to proper position. Close and se- cure control box door.

68

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Contents Contrc Unit Sizes and Modular Combinations Unit ModelKeypaddisplay Ground Fault Interrupter Source PSIRELAY, B FieldLOCAL/ENABLE-STOP-CCN Switch Positions and Operation Compressor Protection Control Module CpcsThermistor and Transducer Locations ThermistorsCapacity Control StepsLoading Sequence a Loading Sequence B Unit Control StepsLoading Sequence a Loading Sequence B Unit Capacity Control Steps, 040-070 cant060A\~**Hz FBI Capacity Control Steps, 040-070 cantOy&ya A4l&pi’ Aiti08Aqy,y Steps BP’Loading Loading Sequence B Unit Control Altt Bitt Wtf2Z$’Altt Loading Sequence a Loading Equence B Unit$-t&Z3 Amrox’tt Alt,Blv Displacement Compressors UWrW Arwox A2.p $#l 110 50 HzLoading Sequence a Quence B Unit Control Equence B Displacement Compressors MvroxLoading Equence a Awrox Drt,t 130, 24OA130,24OA 130, 240AAttll’ Loading Equence a UnitLoading Sequence a Sequence B Unit A2.pT3g $$V LOAD11 Control Size StepsLoadin Sequence B Unit Displacement Compressors UVvW PWprox 8514wB2,B3 Al% Al’,BILoading Sequence B Unit Loac \IG Sequence a Loading Sequence B Unit 30GT Displacement Compressors AwoxCapacity Control Steps, 225, 250,280 30GT Capacity Control Steps, 225, 250,280 cantLoac Capacity Control Steps, 225, 250, 280 cant 2501G Sequence a Loading Sequence B Unit ControlCondenser Fan Sequence FAN Arrangement FAN Numbers Contactor ControlledCondenser Fan Sequence cant FAN Arrangement FAN Numbers~jACToR 30GT250 60 HzKeypad and Display Module Also Called Hsio Keypad and Display Module UsageAccessing Functions and Subfunctions Functions and SubfunctionsFunctions Operation Keypad Display Description Entry ResponseKeypad Directory Keypad Directory cant Status cant Subfunction Keypadentry Display CommentPressure AnalogSubfunction Outputs Display Subfunction Keypad Entry Display Comment OutputsOutputs HgbraKeypad Directory cant Test cant Subfunction Keypad Entry Display Comment OverrideClock Select QzqKeypad Directory Schedule cant Keypad Directory cant Service cord Keypad Directory cant Example 1 Reading Alarm Codes Operationat and Mode Display CodesKeypad Display Local on Cool Alarms Modes Local on M O D EExample 2 Reading Current Operating Modes Keypad Display Comments Entry Response Example 3 Using Test FunctionExample 4 Reading and Changing Chilled Water Set Point Example 5 Using Return Water Temperature Reset Keypad Display CommentsCRST2 CrstiExample 6 Changing Reset Type Reset Reference Temperature Outdoor AIR 1OR Space TempEKE Ppiq Keypad Display Entry ResponseFLD CFG Ertyp Lstyp Demand MAX Demand Kimax = Example 8 Setting Time of Day Day of WeekDemand Limiting Factory Configuration Keystrokes Adjustable Field ConfigurationsExample 9 Using the Schedule Function DisplayExample 9 Using the Schedule Function cant Example 10 Holiday Schedule FunctionTypical Stoppage Faults and Reset Types Complete Unit Stoppage Complete unit stopAlarm Codes Action Taken Probable Cause N T R O LPage Page ’ Sl R ’ STnanz Switch CGFCompressor Contactor Relay SNBFig. IOD 24-V Safety Circuit Wiring 225, 250, and 280 Units Electronil c Expansion Valve EXV Page Thermistor and Pressure Transducer Locations Associated Modular Units Refrigerant Temperature Sensor T7, T8 040-210Suction Pressure Transducer 2i.b Voltage Drop Voltage Resistance DropEqualizer OIL Pressure Suction Pressure Sight Glass Line Transducer Each CompressorControl Modules PSIO, SIO Address SelectorSensor Bus Wiring Communications Processor Module PsioComm Troubleshooting Circuit Circuit B Or2 30GN190-210 3OGT225,250,280 Standard and Accessory Unloaders1NO. of Accessory Accessory Unloader Control Wiring 080-110 SO/SO Hz and 130 60 HzHgbpr TLNContactor Switch Circuit Breaker Transformer LmyTEF4Module STAGE2Module J7-15Thermistor ElJ7-16Installation Remote Dual Set Point ControlPage Page Copyright 1994 Carrier Corporation

040-420 specifications

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