7
The unit is factory wired for the voltage shown on the unit’s
data plate. Refer to model nomenclature in Appendix B for
voltage requirement for your unit.
NOTE:
If supply voltage is 208V, lead on primary of trans-
former(s) must be moved from the 230V to the 208V tap.
Refer to wiring diagram on unit for details.
Main power wiring should be sized for the minimum circuit
ampacity shown on the unit’s data plate. Size wires in ac-
cordance with the ampacity tables in Article 310 of the Na-
tional Electrical Code. If long wires are required, it may be
necessary to increase the wire size to prevent excessive
voltage drop. Wires should be sized for a maximum of 3%
voltage drop.
NOTE:
A weather-tight disconnect switch, properly sized
for the unit total load, must be field or factory installed. An
external field supplied disconnect may be mounted on the
exterior panel.
Ensure the data plate is not covered by the field-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the pow-
er leads at the point of distribution in accordance with the
unit’s data plate.
• The unit must be electrically grounded in accordance with
local codes or, in the absence of local codes, with the latest
edition of the National Electrical Code (ANSI-NFPA 70). A
ground lug is provided for this purpose. Size grounding
conductor in accordance with Table 250-95 of the National
Electrical Code. Do not use the ground lug for connecting
a neutral conductor.
• Remove plug in panel located at the condenser end of unit
and route conduit to control box. Remove plug in control
box and connect power wiring to the contactor closest to
the entrance. If Single Point kit is used, refer to Installation
Instructions supplied with kit.
CAUTION
T
O AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE
ONLY COPPER CONDUCTORS.
L
ABEL
ALL
WIRES
PRIOR
TO
DISCONNECTION
WHEN
SERVICING
CONTROLS
. W
IRING
ERRORS
CAN
CAUSE
IMPROPER
AND
DANGEROUS
OPERATION
. V
ERIFY
PROPER
OPERATION
AFTER
SERVICING
.
CAUTION
LOW VOLTAGE
BLOCK
MAIN POWER
LOW VOLTAGE
ENTRANCE
POWER THRU
THE CURB
CONTROL BOX
CONTROL BOX CONNECTIONS
DDC CONTROL BOX
LOW VOLTAGE/THERMOSTAT CONNECTIONS
NOTE:
Some models may vary from illustration.
Models with electric heat are equipped
with a power block for field connections.
GROUND
LUG
FIELD SUPPLIED
WIRING
F
AILURE
OF
UNIT
DUE
TO
OPERATION
ON
IMPROPER
LINE
VOLTAGE
OR
WITH
EXCESSIVE
PHASE
UNBALANCE
CONSTITUTES
PRODUCT
ABUSE
AND
IS
NOT
COVERED
BY
THE
WARRANTY
. I
T
MAY
CAUSE
SEVERE
DAMAGE
TO
THE
UNIT
ELECTRICAL
COMPONENTS
.
WARNING
