7
WARNING
HIGH VOLTAGE!
Disconnect all power before servicing or in-
stalling this unit. Multiple power sources may
be present. Failure to do so may cause proper-
ty damage, personal injury or death.
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.
LEAD
THERMOSTAT
Red
R (24V)
Green
G (Fan)
Yellow
Y (Cool)
White
W1 (Heat)*
Brown
W2 (Heat)*
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.
TERMINAL
THERMOSTAT
Red
R (24V)
Green
G (Fan)
Orange
O (Rev. Valve)
White
W1 (Heat, 2nd)*
Brown
W2 (Heat 3rd)*
Yellow
Y (Cool)
C (Blue)
C (Common)
*Optional field installed heat connections
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.
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
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.
WARNING
HIGH VOLTAGE!
Disconnect all power before servicing or in-
stalling this unit. Multiple power sources may
be present. Failure to do so may cause proper-
ty damage, personal injury or death.
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.
8. Turn the thermostat system switch to “OFF” and
disconnect all power when servicing the unit.
WARNING
HIGH VOLTAGE!
Disconnect all power before servicing or in-
stalling this unit. Multiple power sources may
be present. Failure to do so may cause proper-
ty damage, personal injury or death.
