Make all electrical connections in accordance with National Electrical Code (NEC) ANSI/NFPA 70-2002 and any local codes or ordinances that
might apply. For Canadian installations, all electrical connections must be made in accordance with Canadian Electrical Code CSA C22.1 or
authorities having jurisdiction.
Fig. 31—Heating and Cooling Application Wiring Diagram
A02174
115-V FIELD-
SUPPLIED
DISCONNECT
AUXILIARY
J-BOX
24-V
TERMINAL
BLOCK
THREE-WIRE
HEATING-ONLY
FIVE WIRE
NOTE 1
NOTE 2
FIELD-SUPPLIED
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
FURNACE
C
O
N
T
R
O
L
R
G
COM
W
C
R
G
Y
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
BLOWER DOOR SWITCH
WHT
BLK
WHT
BLK
NOTES:
Connect Y-terminal in furnace as shown for proper blower 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 6—Electrical Data
UNIT
SIZE
VOLTS—
HERTZ—
PHASE
OPERATING
VOLTAGE RANGE
MAX
UNIT
AMPS
UNIT
AMPACITY†
MIN
WIRE
GAUGE
MAX WIRE
LENGTH
(FT)‡
MAX FUSE
OR CKT BKR
AMPS**
Max*
Min*
024040
115—60—1
127
104
6.1
8.4
14
44
15
036040
115—60—1
127
104
7.3
10.0
14
37
15
024060
115—60—1
127
104
6.1
8.4
14
44
15
036060
115—60—1
127
104
7.1
9.8
14
38
15
048060
115—60—1
127
104
9.5
12.8
14
29
15
036080
115—60—1
127
104
7.6
10.4
14
36
15
048080
115—60—1
127
104
10.0
13.4
14
28
15
060080
115—60—1
127
104
14.1
18.4
12
31
20
048100
115—60—1
127
104
10.2
13.5
14
27
15
060100
115—60—1
127
104
14.8
19.3
12
30
20
060120
115—60—1
127
104
14.6
19.1
12
30
20
060140
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 full load amps of largest operating component plus 100 percent of full load amps of all other potential operating components (EAC,
humidifier, etc.).
‡ Length shown is as 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
—30—
