FIRE HAZARD
Failure to follow this warning could result in serious injury,
death, or property damage.
Do not connect aluminum wire between disconnect switch
and furnace. Use only copper wire. (See Fig. 32.)
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in serious injury,
death, or property damage.
The cabinet MUST have an uninterrupted or unbroken ground
according to NEC ANSI/NFPA 70-2002 and Canadian Elec-
trical Code CSA C22.1 or local codes to minimize personal
injury if an electrical fault should occur. This may consist of
electrical wire or conduit approved for electrical ground when
installed in accordance with existing electrical codes. Do not
use gas piping as an electrical ground.
Factory Installed J-Box Location
Install electrical entry hole filler plugs (factory-supplied in loose
parts bag) in unused power entry holes. (See Fig. 33.)
J-Box Relocation
1. Remove 2 screws holding auxiliary J-box. (See Fig. 34.)
2. Rotate J-box 180° and attach box to left side, using holes
provided.
3. Install electrical entry hole filler plugs (factory-supplied loose
parts Bag) in unused power entry holes. (See Fig. 34.)
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in serious injury,
death, or property damage.
If manual disconnect switch is to be mounted on furnace,
select a location where a drill or fastener will not contact
electrical or gas components.
24–V WIRING
Connect 24-v thermostat leads to 24-v terminal block on furnace
control. For proper cooling operation, Y wire from thermostat
MUST be connected to Y/Y2 terminal on furnace control, as
shown in Fig. 31. The 24-v terminal block is marked for easy
connection of field wiring. (See Fig. 35.) The 24-v circuit contains
a 3-amp, automotive-type fuse located on furnace control. (See
Fig. 36.) Any electrical shorts of 24-v wiring during installation,
service, or maintenance may cause fuse to blow. If fuse replace-
ment is required, use only a fuse of identical size (3 amp) and type.
The control will flash code 24 when fuse needs replacement.
NOTE:
Use AWG No. 18 color-coded copper thermostat wire
for lengths up to 100 ft. For wire lengths over 100 ft, use AWG No.
16 wire.
ACCESSORIES
1. Electronic Air Cleaner (EAC)
Two quick-connect terminals marked EAC-1 and EAC-2 are
Table 6—Electrical Data
FURNACE
SIZE
VOLTS—
HERTZ—
PHASE
OPERATING
VOLTAGE RANGE
MAX
UNIT
AMPS
UNIT
AMPACITY†
MIN
WIRE
SIZE
MAX WIRE
LENGTH
(FT)‡
MAX FUSE
OR CKT BKR
AMPS**
Max*
Min*
040-08
115-60-1
127
104
6.1
8.4
14
44
15
040-12
115-60-1
127
104
7.3
10.0
14
37
15
060-08
115-60-1
127
104
6.1
8.4
14
44
15
060-12
115-60-1
127
104
7.1
9.8
14
38
15
060-16
115-60-1
127
104
9.5
12.8
14
29
15
080-12
115-60-1
127
104
7.6
10.4
14
36
15
080-16
115-60-1
127
104
10.0
13.4
14
28
15
080-20
115-60-1
127
104
14.1
18.4
12
31
20
100-16
115-60-1
127
104
10.2
13.5
14
27
15
100-20
115-60-1
127
104
14.8
19.3
12
30
20
120-20
115-60-1
127
104
14.6
19.1
12
30
20
140-20
115-60-1
127
104
14.3
18.8
12
30
20
* Permissible limits of voltage range at which unit will operate satisfactorily.
† Unit ampacity = 125 percent of largest operating component’s full load amps plus 100 percent of all other potential operating components’ (EAC, humidifier, etc.) full
load amps.
‡ Length shown is a measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.
Fig. 32—Disconnect Switch and Furnace
A93033
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
→
Fig. 33—Factory Installed J-Box Location
A05113
FACTORY
INSTALLED
LOCATION
UNUSED 7/8-IN.
DIAMETER POWER
ENTRY HOLES
POWER ENTRY HOLE
FILLER PLUG (FACTORY-
SUPPLIED LOOSE PARTS BAG)
26
→
→