035-19670-003 Rev. A (1004)
Unitary Products Group
9
SECTION V: ELECTRICAL POWER
Electrical Power Connections
Field wiring to the unit must be grounded. Electric wires that are field
installed shall conform to the temperature limitation for 63°F (35°C) rise
wire when installed in accordance with instructions. Refer to Table 8 in
these instructions for specific furnace electrical data.
Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures.
Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes.
The furnace shall be installed so that the electrical components are protected from water.
SUPPLY VOLTAGE CONNECTIONS
1.
Provide a power supply separate from all other circuits. Install
overcurrent protection and disconnect switch per local/national
electrical codes. The switch should be close to the unit for conve-
nience in servicing. With the disconnect or fused switch in the OFF
position, check all wiring against the unit wiring label. Refer to the
wiring diagram in this instruction.
2.
Remove the screws retaining the wiring box cover. Route the
power wiring through the opening in the unit into the junction box
with a conduit connector or other proper connection. In the junc-
tion box there will be three wires, a Black Wire, a White Wire and a
Green Wire. Connect the power supply as shown on the unit-wir-
ing label on the inside of the blower compartment door or the wir-
ing schematic in this section. The black furnace lead must be
connected to the L1 (hot) wire from the power supply. The white
furnace lead must be connected to neutral. Connect the green fur-
nace lead (equipment ground) to the power supply ground. An
alternate wiring method is to use a field provided 2” (5.1 cm) x 4”
(10.2 cm) box and cover on the outside of the furnace. Route the
furnace leads into the box using a protective bushing where the
wires pass through the furnace panel. After making the wiring con-
nections replace the wiring box cover and screws. Refer to Figure
11.
3.
The furnace's control system requires correct polarity of the power
supply and a proper ground connection. Refer to Figure 11 or
"FURNACE CONTROL DIAGONSICS" for symptoms of reversed
power supply polarity.
IMPORTANT:
The power connection leads and wiring box may be relo-
cated to the left side of the furnace. Remove the screws and cut wire tie
holding excess wiring. Reposition on the left side of the furnace and fas-
ten using holes provided.
POWER SUPPLY POLARITY - Ignition Control:
If the power supply
polarity is reversed, the control board will flash 9 times. The furnace will
not operate until the polarity is corrected.
LOW VOLTAGE CONTROL WIRING CONNECTIONS
Install the field-supplied thermostat by following the instructions that
come with the thermostat. With the thermostat set in the OFF position
and the main electrical source disconnected, connect the thermostat
wiring from the wiring connections on the thermostat to the terminal
strip on the integrated control board, as shown in Figure 13 for single
stage or Figure 14 for two stage. Electronic thermostats may require the
common wire to be connected to the "C" terminal as shown in Figures
13 & 14. Apply strain relief to thermostat wires passing through cabinet.
If air conditioning equipment is installed, use thermostat wiring to con-
nect the Y and C terminals on the integrated control board to the yellow
and brown wires on the condensing unit (unit out side) as shown in Fig-
ure 13 or 14.
Use copper conductors only.
TABLE 8:
Ratings & Physical / Electrical Data
Input Output
Nominal
Cabinet
Width
AFUE
Air Temp. Rise
Max. Outlet Air Temp.
MBH
kW
MBH
kW
CFM
cmm
In.
cm
°F
°C
°F
°C
60/42
17.6/12.3
46/34
13.5/10.0
1200
34.0
14-1/2
36.8
80.0
25-55
13-31
165
73.9
80/59
23.4/17.3
64/48
18.8/14.1
1200
34.0
14-1/2
36.8
80.0
30-60
19-36
175
79.4
80/59
23.4/17.3
64/48
18.8/14.1
1600
45.3
17 1/2
44.5
80.0
25-55
14-31
160
71.1
100/65
29.3/19.1
80/53
23.4/15.5
1200
34.0
17 1/2
44.5
80.0
25-55
14-31
170
76.7
100/65
29.3/19.1
80/53
23.4/15.5
2000
56.6
21 53.3
80.0
25-55
14-31
160
71.1
120/78
35.2/22.9
96/64
28.1/18.8
1600
45.3
21 53.3
80.0
25-55
14-31
180
82.2
120/78
35.2/22.9
96/64
28.1/18.8
2000
56.6
21 53.3
80.0
25-55
14-31
170
76.7
Input
Output Blower
Blower
Size
Total
Unit
Max Over-current
Size (awg) @
75 ft.protect
Min.
Wire
one way
Operation
WGT.
Operation
WGT.
MBH kW
MBH kW Hp
Amps
In. cm Amps
LBS Kg
60/42
17.6/12.3
46/34
13.5/10.0
1/3
6.2
10 x 7
25.4 x 17.8
9.0
20
14
107
48.5
80/59
23.4/17.3
64/48
18.8/14.1
1/3
6.2
10 x 7
25.4 x 17.8
9.0
20
14
119
54.0
80/59
23.4/17.3
64/48
18.8/14.1
3/4
11.5
11 x 8
27.9 x 20.3
12.0
20
14
129
58.5
100/65
29.3/19.1
80/53
23.4/15.5
1/2
7.0
10 x 8
25.4 x 20.3
12.0
20
14
131
59.4
100/65
29.3/19.1
80/53
23.4/15.5
1.0
12.2
11 x 10 27.9 x 25.4
14.0
20
12
149
67.6
120/78
35.2/22.9
96/64
28.1/18.8
1/2
10.4
10 x 10 25.4 x 25.4
12.0
20
14
149
67.6
120/78
35.2/22.9
96/64
28.1/18.8
1.0
12.2
11 x 10 27.9 x 25.4
14.0
20
12
151
68.5
FIGURE 9:
Electrical Wiring
BLK/BLK
WHT/WHT
GRN/GRN
HUM
EAC
L1
(HOT)
N
GND
HUM (HOT)
EAC (HOT)
GRN
WHT
BLK
JUNCTION
BOX
DOOR SWITCH
CLASS 2 SYSTEM
CONTROL WIRING
TO THERMOSTAT
WIRING INSIDE
JUNCTION BOX
BURNER
COMPARTMENT
BLOWER
COMPARTMENT
IGNITION
MODULE
