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115-VOLT
SINGLE
PHASE
115-VOLT FIELD-
SUPPLIED
FUSED
DISCONNECT
VOLTS—
UNIT
HERTZ—
SIZE
PHASE
042040
115—60—1
042060
115—60—1
042080
115—60—1
→060080
115—60—1
060100
115—60—1
→060120
115—60—1
* 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 as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay fuse is recommended.
WARNING:
→
Blower access panel door switch opens 115-v power to
control center. No component operation can occur. Do
not bypass or close switch with panel removed. Failure to
follow this warning could result in personal injury or
death.
CAUTION: Furnace control must be grounded for
proper operation or control will lock out. Control is
grounded through green wire routed to gas valve and
burner box screw.
I. 115-V WIRING
Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on unit
rating plate. Also, check to be sure that service provided by utility
is sufficient to handle load imposed by this equipment. Refer to
rating plate or Table 3 for equipment electrical specifications.
Make all electrical connections in accordance with NEC
ANSI/NFPA 70-1993 and any local codes or ordinances that might
NOTE 5
FIVE
WIRE
THREE-WIRE
HEATING
ONLY
W/W1
W2
R
G
AUXILIARY
J-BOX
C
Y/Y2
FURNACE
24-VOLT
CONTROL
TERMINAL
CENTER
BLOCK
Fig. 22—Heating and Cooling Application Wiring Diagram
TABLE 3—ELECTRICAL DATA
OPERATING
MAXIMUM
VOLTAGE RANGE
UNIT
AMPS
Maximum*
Minimum*
127
104
127
104
127
104
127
104
13.8
127
104
13.8
127
104
11.2
THERMOSTAT
W
C
R
G
Y
TERMINALS
NOTE
3
NOTE 1
TWO WIRE
NOTES:
1.
Connect Y or Y/Y2 terminal as shown for proper cooling operation.
2.
Proper polarity must be maintained for 115-volt wiring.
3.
Use W2 with 2-stage thermostat when zoning.
4.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
5.
Some thermostats require a "C" terminal connection as shown.
MINIMUM
UNIT
WIRE
AMPACITY†
SIZE
8.9
12.0
14
8.9
12.0
14
8.9
12.0
14
17.9
12
18.1
12
14.7
14
apply. For Canadian installations, all electrical connections must
be made in accordance with Canadian Electrical Code CSA C22.1
or subauthorities having jurisdiction.
ELECTRIC
DISCONNECT
SWITCH
CAUTION: Do not connect aluminum wire between
disconnect switch and furnace. Use only copper wire.
Use a separate, fused branch electrical circuit containing a properly
sized fuse or circuit breaker for this furnace. See Table 3 for wire
—17—
FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-, 208/230-, 460-VOLT WIRING
FIELD-SUPPLIED
FUSED DISCONNECT
GND
GND
GND
GND
CONDENSING
UNIT
MAXIMUM WIRE
MAXIMUM FUSE OR
LENGTH (FT)‡
CKT BKR AMPS**
31
31
31
32
32
25
COPPER
WIRE ONLY
ALUMINUM
WIRE
208/230- OR
460-VOLT
THREE
PHASE
208/230-
VOLT
SINGLE
PHASE
A95199
15
15
15
20
20
15
A93033
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