8
Step 5 — Make Electrical Connections
FIELD POWER SUPPLY — All units are factory wired for
the voltage shown on the nameplate.
Refer to unit label diagram for additional information. Lead
wires are provided for field wire connections. Use factory-
supplied splices or suitable copper connector.
When installing units, provide a disconnect.
NOTE: If accessory thru-the-bottom connections are used,
refer to the accessory installation instructions for power wiring.
All field wiring must comply with local requirements. In-
stall field wiring as follows:
1. Install conduit through side panel openings. Install con-
duit between disconnect and single-point box. Refer to
Fig. 6 and 7.
2. Install power lines to terminal connections as shown in
Fig. 8.
3. Voltage to compressor terminals during operation must be
within voltage range indicated on unit nameplate (see
Table 2). Voltages between phases must be balanced
within 2% and the current within 10%. Use the formula
shown in Table 2, Note 3 to determine the percent voltage
imbalance. Operation on improper line voltage or exces-
sive phase imbalance constitutes abuse and may cause
damage to electrical components. Such operation would
invalidate any applicable Carrier warranty.
Unit cabinet must have an uninterrupted, unbroken electri-
cal ground to minimize the possibility of personnal injury if
an electrical fault should occur. This ground may consist of
electrical wire connected to unit ground lug in control com-
partment, or conduit approval for electrical ground when
installed in accordance with local electrical codes. Failure
to follow this warning could result in the installer being lia-
ble for personal injury of others.
Fig. 7 — Conduit Installation
LEGEND
Fig. 8 — Power Wiring Connections
Disconnect Per Local Codes
Single Point Box
Accessory
Field Wiring
HOLE
IN END
PANEL
RACEWAY EURO-STYLE
CONTROL
BOX
SINGLE
POINT
BOX
SINGLE
POINT BOX
MOUNTING
SCREWS
DISCONNECT
MOUNTING
LOCATION
EMT (ELECTRIC
METALLIC TUBING)
OR RIGID CONDUIT
(FIELD SUPPLIED)
BRACKET AND
CONDUIT
BOOT
CENTER
POST
Fig. 6 — Component Location