Carrier EVERGREEN HFC-134A User Manual

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).

Remove the VFD shipping bracket shown in Fig. 16.

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.