129098-UIM-G-0411
12
Johnson Controls Unitary Products
Table shows 4% Input Reduction per 1,000 feet Elevation. Reference Source: NFPA No. 54, ANSI Z 223.1, National Fuel Gas Code.
For Canadian high altitude (2000 - 4500 feet), reduce gas manifold pressure to 3.0” W.C. for Natural gas, 9.0” W.C. for Propane gas
SECTION VI: 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 5 in
these instructions for specific furnace electrical data.
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 junction
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.
3.
The furnace's control system requires correct polarity of the power
supply and a proper ground connection. Refer to Figure 16.
LOW VOLTAGE CONTROL WIRING CONNECTIONS
1.
Insert 24 volt wires through the small plastic bushing just above
the control panel.
2.
Connect the thermostat wires to the furnace low voltage pigtails.
See Figure 17 (heating only) and Figure 18 or 19 (heating and
cooling).
3.
Connect thermostat wires to the furnace when installing blend air
accessory as shown in Figure 20.
4.
Connect low-voltage circuit to the wall thermostat pigtails.
NOTE:
Five-conductor thermostat cable is recommended for all instal-
lations to allow easy installation of an air conditioning system at a later
time.
TABLE 4:
High Altitude Duration Chart
NATURAL GAS
Elevation
Feet
56,000 — Input
70,000 — Input
77,000 — Input
90,000 — Input
Meters
Orifice
Dia.
Drill
Size
Part #
Orifice
Dia.
Drill
Size
Part #
Orifice
Dia.
Drill
Size
Part #
Orifice
Dia.
Drill
Size
Part #
Sea Level
0.136
29
9951-1361
0.154
23
9951-1541
0.161
20
9951-1611
0.180
15
9951-1801
2,000
618
0.136
29
9951-1361
0.149
25
9951-1491
0.157
22
9951-1571
0.177
16
9951-1771
3,000
914
0.128
30
9951-1281
0.149
25
9951-1491
0.157
22
9951-1571
0.173
17
9951-1731
4,000
1219
0.128
30
9951-1281
0.147
26
9951-1471
0.154
23
9951-1541
0.173
17
9951-1731
5,000
1524
0.128
30
9951-1281
0.144
27
9951-1441
0.152
24
9951-1521
0.169
18
9951-1691
6,000
1829
0.128
30
9951-1281
0.144
27
9951-1441
0.149
25
9951-1491
0.166
19
9951-1661
7,000
2134
0.120
31
9951-1201
0.140
28
9951-1401
0.147
26
9951-1471
0.161
20
9951-1611
8,000
2438
0.120
31
9951-1201
0.136
29
9951-1361
0.144
27
9951-1441
0.161
20
9951-1611
9,000
2743
0.120
31
9951-1201
0.136
29
9951-1361
0.140
28
9951-1401
0.157
22
9951-1571
10,000
3048
0.116
32
9951-1161
0.128
30
9951-1281
0.136
29
9951-1361
0.152
24
9951-1521
PROPANE GAS
Elevation
Feet
56,000 — Input
70,000 — Input
77,000 — Input
90,000 — Input
Meters
Orifice
Dia.
Drill
Size
Part #
Orifice
Dia.
Drill
Size
Part #
Orifice
Dia.
Drill
Size
Part #
Orifice
Dia.
Drill
Size
Part #
Sea Level
0.082
45
9951-0821
0.093
42
9951-0931
0.098
40
9951-0981
0.106
36
9951-1061
2,000
618
0.081
46
9951-0811
0.093
42
9951-0931
0.096
41
9951-0961
0.104
37
9951-1041
3,000
914
0.078
47
9951-0781
0.089
43
9951-0891
0.093
42
9951-0931
0.101
38
9951-1011
4,000
1219
0.078
47
9951-0781
0.089
43
9951-0891
0.093
42
9951-0931
0.101
38
9951-1011
5,000
1524
0.078
47
9951-0781
0.089
43
9951-0891
0.093
42
9951-0931
0.099
39
9951-0991
6,000
1829
0.076
48
9951-0761
0.086
44
9951-0861
0.089
43
9951-0891
0.098
40
9951-0981
7,000
2134
0.076
48
9951-0761
0.086
44
9951-0861
0.089
43
9951-0891
0.096
41
9951-0961
8,000
2438
0.073
49
9951-0731
0.082
45
9951-0821
0.086
44
9951-0861
0.096
41
9951-0961
9,000
2743
0.073
49
9951-0731
0.081
46
9951-0811
0.086
44
9951-0861
0.093
42
9951-0931
10,000
3048
0.070
50
9951-0700
0.078
47
9951-0781
0.082
45
9951-0821
0.089
43
9951-0891
Use copper conductors only.
FIGURE 16:
Line Wiring Connections
Set the heat anticipator in the room thermostat to 0.40 amps. Set-
ting it lower will cause short cycles. Setting it higher will cause room
temperature to exceed the set points.
BLK
WHT
GRN
BLK (HOT)
WHT (NEUTRAL)
GRN
NOMINAL
120 VOLT
