WARNING: The cabinet MUST have an uninterrupted
or unbroken ground according to NEC ANSI/NFPA
70-1999 and Canadian Electrical 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. Failure to follow this
warning could result in electrical shock, fire, or death.
J-BOX RELOCATION
1. Remove 2 screws holding auxiliary J-box. (See Fig. 23.)
2. Rotate J-box 180° and attach box to left side, using holes
provided.
CAUTION: 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.
B. 24–V Wiring
Make field 24-v thermostat connections at 24-v terminal block on
control center. For proper cooling operation, Y wire from thermo-
stat MUST be connected to Y terminal on control center, as shown
in Fig. 22. The 24-v terminal board is marked for easy connection
of field wiring. (See Fig. 24.) The 24-v circuit contains a 3-amp,
automotive-type fuse located on control center. (See Fig. 25.) Any
electrical shorts of 24-v wiring during installation, service, or
maintenance may cause fuse to blow. If fuse replacement is
required, use only a fuse of identical size (3 amp).
Fig. 22—Heating and Cooling Application Wiring Diagram
A98209
115-V
FIELD-SUPPLIED
DISCONNECT
AUXILIARY
J-BOX
CONTROL
BOX
24-V
TERMINAL
BLOCK
THREE-WIRE
HEATING-
ONLY
FIVE
WIRE
NOTE 1
NOTE 2
FIELD-SUPPLIED
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
FURNACE
R
G
C
WCR GY
GND
GND
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
WHT
BLK
WHT
BLK
NOTES: Connect Y-terminal as shown for proper operation.
Some thermostats require a "C" terminal connection as shown.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
W
Y
GND
THERMOSTAT
TERMINALS
1.
2.
3.
TABLE 4—ELECTRICAL DATA
UNIT
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.
—19—
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