7
accordance with local codes, or in absence of local codes,
with N.E.C ANSI/ NFPA NO. 70-1984
or latest edition by using
ground lug in the control box.
Fuses or HACR type circuit breakers may be used where
codes permit.
Note: Some single phase units are equipped with a single pole
contactor. Caution must be exercised when servicing as only
one leg of the power supply is broken with the contactor.
To wire the unit, make the following high and low voltage connections.
High Voltage Wiring: (See Figure 6)
Single Phase- Two leads should be connected to terminals L1
& L2 in the electrical control section, using wire sizes specified
in wiring table.
Low Voltage Wiring: (See Figure 6)
a. Air Conditioners- Connect 24V wires from the thermostat to the
corresponding wires in the control box using No. 18AWG as shown in TABLE
2.
b. Heat Pumps- Connect 24V wires from the thermostat to the corresponding
wires in the control box using No. 18AWG as shown in TABLE 3.
Internal Wiring:
A diagram detailing the internal wiring of this unit is located on the electrical
box cover. If any of the original wire supplied with the appliance must be
replaced, the wire gauge and insulation must be the same as the original wiring.
Transformer is wired for 230 volts on the 208/230 models. See wiring diagram
for 208 volt wiring.
1. For branch circuit wiring (main power supply to unit
disconnect), the minimum wire size for the length of the
run can be determined from Table 4 using the circuit
ampacity found on the unit rating plate. From the unit
disconnect to unit, the smallest wire size allowable in
Table 4 may be used for the ampacity,
as the Disconnect
must be in sight of the unit.
2. Wire size based on 60° C rated wire insulation and 30° C
Ambient Temperature (86° F).
3. For more than 3 conductors in a raceway or cable, see the
N.E.C. for derating the ampacity of each conductor.
OPERATION
Start-Up Procedure and Checklist
Begin with power turned off at all disconnects.
1. Turn thermostat system switch to “Cool,” and fan switch
to “Auto” and turn temperature setting as high as it will
go.
2. Inspect all registers and set them to the normal open
position.
3. Turn on the electrical supply at the disconnect.
4. Turn the fan switch to the “ON” position. The blower should operate after a 10 second delay.
5. Turn the fan switch to “Auto” position. The blower should stop after a 60 second delay.
6. Slowly lower the cooling temperature until the unit starts. The compressor, blower and fan should now be operating.
Allow the unit to run 10 minutes, make sure cool air is being supplied by the unit.
7. Turn the temperature setting to the highest position, stopping the unit. The indoor blower will continue to run for 60
seconds.
LEAD
THERMOSTAT
Red
R (24V)
Green
G (Fan)
Yellow
Y (Cool)
W hite
W 1 (Heat)*
Brown
W 2 (Heat)*
TERMINAL
THERMOSTAT
Red
R (24V)
Green
G (Fan)
Orange
O (Rev. Valve)
W hite
W 1 (Heat, 2nd)*
B rown
W 2 (Heat 3rd)*
Yellow
Y (Cool)
C (Blue)
C (Common)
TABLE 2
TABLE 3
*Optional field installed heat connections
BRANCH CIRCUIT AMPACITY
15
20
25
30
35
40
45
50
SUPPLY WIRE LENGTH -
FEET
200
6
4
4
4
3
3
2
2
150
8
6
6
4
4
4
3
3
100
10
8
8
6
6
6
4
4
50
14
12
10
10
8
8
6
6
TABLE 4
WARNING
HIGH
VOLTAGE
!
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR INSTALLING
THIS UNIT.
M
ULTIPLE POWER SOURCES MAY BE PRESENT. FAILU
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY O
DEATH.
RE
R
WARNING
HIGH
VOLTAGE
!
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR INSTALLING
THIS UNIT.
M
ULTIPLE POWER SOURCES MAY BE PRESENT. FAILU
TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY O
DEATH.
RE
R
