6
All units have undergone a run test prior to packaging for
shipment. This equipment has been started at minimum
rated voltage and checked for satisfactory operation. Do
not attempt to operate this unit if the voltage is not within
the minimum and maximum voltages shown on nameplate.
All exterior wiring must be within approved weatherproof
conduit. The unit must be
permanently grounded
in
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.
T1
T2
T3
L1
L2
L3
CONTACTOR
HIGH VOLTAGE
DISCONNECT
SWITCH
LOW VOLTAGE CONNECTORS
R
C
O
M
M
O
N
H
E
A
T
F
A
N
C
O
O
L
W
Y
G
T
H
E
R
M
O
S
T
A
T
S
U
B
B
A
S
E
Y G R W
FOR INTERNAL WIRING SEE WIRING LABEL ATTACHED TO UNIT
HIGH VOLTAGE POWER WIRING
24 VOLT CONTROL WIRING
L3 CONNECTION - 3 PHASE ONLY
FIGURE 6
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
contractor.
To wire the unit, make the following high and low voltage
connections.
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE INSTALLING OR
SERVICING. MULTIPLE POWER SOURCES MAY BE
PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
WARNING
High Voltage Wiring: (See Figure 6)
a.
Single Phase- Two leads should be connected to terminals
L1 & L2 in the electrical control section, using wire sizes
specified in wiring table.
b.
Three Phase- Three leads should be connected to
terminals L1, L2 and L3 in the electrical 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 follows:
LEAD
THERMOSTAT
Red
R (24V)
Green
G (Fan)
Yellow
Y (Cool)
W hite
W 1 (Heat)*
Brown
W 2 (Heat)*
TABLE 2
b.
Heat Pumps- Connect 24V wires from the thermostat to
the corresponding wires in the control box using No.
18AWG as follows:
TERMINAL
THERMOSTAT
Red
R (24V)
Green
G (Fan)
Orange
O (Rev. Valve)
W hite
W 1 (Heat, 2nd)*
B rown
W 2 (Heat 3rd)*
Y ellow
Y (Cool)
C (B lue)
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.
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE INSTALLING OR
SERVICING. MULTIPLE POWER SOURCES MAY BE
PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
WARNING
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.
