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9
T
O
PREVENT
SEVERE
DAMAGE
TO
THE
BOTTOM
OF
THE
UNIT
,
DO
NOT
FORK
LIFT
UNIT
AFTER
WOOD
STRUTS
HAVE
BEEN
REMOVED
.
CAUTION
Bring condenser end of unit into alignment with the curb.
With condenser end of the unit resting on curb member and
using curb as a fulcrum, lower opposite end of the unit until
entire unit is seated on the curb. When a rectangular can-
tilever curb is used, care should be taken to center the unit.
Check for proper alignment and orientation of supply and
return openings with duct.
r
igging
r
emOval
T
O
PREVENT
DAMAGE
TO
THE
UNIT
,
DO
NOT
ALLOW
CRANE
HOOKS
AND
SPREADER
BARS
TO
REST
ON
THE
ROOF
OF
THE
UNIT
.
CAUTION
Remove spreader bars, lifting cables and other rigging
equipment.
ELECTRICAL WIRING
HIGH VOLTAGE!
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
THIS
UNIT
. M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
HIGH VOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DO
NOT
TAMPER
WITH
FACTORY
WIRING
. T
HE
INTERNAL
POWER
AND
CONTROL
WIRING
OF
THESE
UNITS
ARE
FACTORY
-
INSTALLED
AND
HAVE
BEEN
THOROUGHLY
TESTED
PRIOR
TO
SHIPMENT
.
C
ONTACT
YOUR
LOCAL
REPRESENTATIVE
IF
ASSISTANCE
IS
REQUIRED
.
WARNING
T
O
PREVENT
DAMAGE
TO
THE
WIRING
,
PROTECT
WIRING
FROM
SHARP
EDGES
. F
OLLOW
NATIONAL
ELECTRICAL
CODE
AND
ALL
LOCAL
CODES
AND
ORDINANCES
. D
O
NOT
ROUTE
WIRES
THROUGH
REMOVABLE
ACCESS
PANELS
.
CAUTION
C
ONDUIT
AND
FITTINGS
MUST
BE
WEATHER
-
TIGHT
TO
PREVENT
WATER
ENTRY
INTO
THE
BUILDING
.
CAUTION
For unit protection, use a fuse or hacr circuit breaker that is
in excess of the circuit ampacity, but less than or equal to the
maximum overcurrent protection device. DO NOT EXCEED
THE MAXIMUM OVERCURRENT DEVICE SIZE SHOWN
ON UNIT DATA PLATE.
All line voltage connections must be made through weath-
erproof fittings. All exterior power supply and ground wiring
must be in approved weatherproof conduit.
The main power supply wiring to the unit and low voltage wir-
ing to accessory controls must be done in accordance with
these instructions, the latest edition of the National Electrical
Code (ANSI/NFPA 70), and all local codes and ordinances.
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. Re-
fer to wiring diagram on unit for details.
Main power wiring should be sized for the minimum circuit am-
pacity shown on the unit’s database. Size wires in accordance
with the ampacity tables in Article 310 of the National Electri-
cal Code. If long wires are required, it may be necessary to in-
crease the wire size to prevent excessive voltage drop. Wires
should be sized for a maximum of 3% voltage drop.
CAUTION
T
O AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE
ONLY COPPER CONDUCTORS.
CAUTION
T
O PREVENT IMPROPER AND DANGEROUS OPERATION DUE TO WIRING ERRORS,
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS.
V
ERIFY PROPER OPERATION AFTER SERVICING.
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
power leads at the point of distribution in accordance with
the unit data plate.
• The unit must be electrically grounded in accordance with
local codes or, in the absence of local codes, with the lat-
est 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.
• Connect power wiring to the compressor contactor closest
to the entrance located within the main control box or to
electrical power block, if equipped.