Carrier HFC-134A installation instructions

Page 37

WIRING THE FIELD WIRING TERMINAL STRIPS — This section describes how to wire the field wiring terminal strips shown in Fig. 46 and 47. The control terminal blocks are mounted to the inside of the enclosure, above and below the control panel.

NOTE: Up to 30 v may be measured across open contact terminals on the hazardous voltage terminal strip.

1.Turn off, lock out, and tag the input power to the drive. Wait five minutes.

2.Verify that there is no voltage at the input terminals (L1, L2, and L3) of the power module.

3.Verify that the status LEDs on the Communications Interface Board are not lit. See Fig. 48. The location of the Communications Interface Board is shown in Fig. 6.

4.Use a screwdriver to remove conduit twist outs in the control panel. Do not punch holes or drill into the top surface of the control center enclosure for field wiring. Knockouts are provided in the back of the control center for field wiring connections.

5.Connect the control wiring as shown in Fig. 47. Tighten all connections to 7 to 9 in-lb.

CONNECT CONTROL INPUTS — Wiring may be speci- fied for a spare safety switch, and a remote start/stop contact can be wired to the starter terminal strip. Additional spare sen- sors and Carrier Comfort Network® modules may be specified as well. These are wired to the machine control panel as indicated in Fig. 49.

CONNECT CONTROL OUTPUTS — Connect auxiliary equipment, chilled and condenser water pumps, and spare alarms as required and indicated on job wiring drawings.

CONNECT STARTER — The 23XRV is equipped with a unit-mounted VFD starter (Fig. 50).

IMPORTANT: Be sure to ground the power circuit in accordance with the National Electrical Code (NEC), applicable local codes, and job wiring diagrams. Also, make sure correct phasing is observed for proper rotation.

Do not punch holes or drill into the top surface of the control center. Knockouts are provided in the back of the control center for wiring connections.

Remove the VFD shipping bracket shown in Fig. 16.

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Contents Installation Instructions Contents Model Number Identification A23-155051 Typical 23XRV ComponentsA23-1553 A23-1551Control Center Components A23-1556 A23-1555A23-1557 23XRV Dimensions Nozzle-In-Head Waterbox23XRV Compressor Weights 23XRV Dimensions Marine Waterbox23XRV Component Weights TR Compressor 23XRV Waterbox Nozzle Sizes23XRV Additional Data for Cooler Marine Waterboxes 23XRV Heat Exchanger Data23XRV Waterbox Cover Weights SI kg 23XRV Waterbox Cover Weights English lb23XRV Additional Data for Condenser Marine Waterboxes Electrical Cable Routing Top View Cooler/Discharge Pipe Assembly Removal A23-1563 A23-1635A23-1564 A23-1567 A23-1565A23-1570 A23-1561 A23-1571 CablesA23-1568 A23-1569 Control Panel InputsA23-1572 Compressor Fastener IdentificationA23-1573 Oil Concentrator RemovalOil Reclaim Piping A23-1576 Motor Terminal BoxA23-1579COUPLINGS A23-1578A23-46 A23-1534A19-1109 A19-1110 A23-1580 A23-1537A23-1581 A23-1538A23-1540 A23-1539A23-1543 A23-1541A23-1634 Rated DRY Weight and Refrigerant CapacityA23-1545 A23-1544Relief Valve Arrangements Pumpout UnitClose the door to the control center Relief Valve LocationsA23-1585 Typical Field Wiring SchematicA23-1586 Typical Field Wiring Schematic A23-1587 Lug CapacityA23-1584 PIC III Control Component LayoutPage A23-1588 23XRV Controls SchematicA23-1589 A23-1592 A23-1591 A23-1590A23-1593 CCN Communication Wiring For Multiple Chillers TypicalA23-1594 23XRV with Unit-Mounted VFD/Control CenterA23-1595 Cable ManufacturersA23-1596 Insulator Codes Install Field Insulation and LaggingA23-1597 Lead/Lag Control WiringA23-1598 A23-1599 23XRV Insulation AreaPage Page Copyright 2006 Carrier Corporation Installation START-UP Request Checklist Testing YES/NO Date to be Completed