j
j/
SUPPLY
DUCT
OPENING
RETURN
DUCT
OPENING
C99011
Fig. 8--Supply and Return Duct Opening
DUCT COVERS REMOVED
C99012
Fig. 9--Vertical Duct Cover Removed
Failure to lbllow these precautions could result in damage to
the unit being installed:
1. Make all electrical connections in accordance with NEC
ANSI/NFPA (latest edition) and local electrical codes
governing such wiring. In Canada, all electrical connec-
tions must be in accordance with CSA standard C22.1
Canadian Electrical Code Part 1 and applicable local
codes. Reli:r to unit wiring diagram.
2. Use only copper conductor lor connections between
field-supplied electrical disconnect switch and unit. DO
NOT USE ALUMINUM WIRE.
3. Be sure that high-voltage power to unit is within operating
voltage range indicated on unit rating plate.
4. Do not damage internal components when drilling through
any panel to mount electrical hardware, conduiL etc. On all
3-phase units, ensure phases are balanced within 2 percent.
Consult local power company lk_rcorrection of improper
voltage and/or phase imbalance.
HIGH-VOLTAGE CONNECTIONS
The unit nmst have a separate electrical service with a field-
supplied, waterproof, disconnect switch mounled at, or within
sight li"om_the unit. RelL'r to the unit rating plate %r maximmn
fuse/circuit breaker size and minimnm circuit amps (ampacity) lor
wire sizing. See Tables 4 and 5 lor electrical data.
The field-supplied disconnect switch box may be mounted on the
unit over the high-voltage inlet hole when the standard power and
low-voltage entry points are used. See Fig. 2 & 3 lor acceptable
location.
See unit wiring label and Fig. 10 %r reli:rence when making high
voltage connections. Proceed as lbllows to complete the high-
voltage connections to the unit.
1. Run the high-voltage (L1, L2, L3) and ground leads into the
control box.
2. Connect ground lead to chassis ground connection.
3. Locate the black and yellow wires connected to the lines side
of the contactor.
4. Connect lield L1 to black wire on connection 11 of the
c{}mpressor cnnt actor.
5. Connect field wire L2 to yellow wire on connection 13 of the
compressor contactor.
6. Connect field wire L3 to Blue wire fl'om compressor.
SPECIAL PROCEDURES FOR 208-V OPERATION
Make sure that the power supply to the unit is switched OFF
and lockout tag installed belore making any wiring changes.
Electrical shock can cause serious injury or death.
10
C()NTR(-)L VOLTAGE CONNECTIONS
NOTE: Do not use any type of power-stealing thermostat. Unit
control problems may result.
Use no. 18 American Wire Gage (AWG) color-code& insulated
(35 ° C miuinmm) wires to make the control voltage connections
between the thermostat and the unit. If the thermostat is located
more than l(t0 ft. fl'on_ the unit (as measured along the control
voltage wires), use no. 16 AWG color-coded, insulated (35 ° C
ndnimum) wires.
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