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926TC: Installation, Start-up, Operating and Service and Maintenance Instructions
ELECTRICAL CONNECTIONS
WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings could result in dangerous operation,
serious injury, death or property damage.
Improper servicing could result in dangerous operation, serious injury,
death or property damage.
-
Before servicing, disconnect all electrical power to furnace.
-
When servicing controls, label all wires prior to disconnection.
Reconnect wires correctly.
-
Verify proper operation after servicing.
-
Always reinstall access doors after completing service and
maintenance.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Blower door switch opens 115-V power to control. No component
operation can occur. Do not bypass or close switch with blower door
removed.
See
Fig. 33
for field wiring diagram showing typical field 115-V wiring.
Check all factory and field electrical connections for tightness.
Field-supplied wiring shall conform with the limitations of 63_F (33_C)
rise.
WARNING
!
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
The cabinet MUST have an uninterrupted or unbroken ground
according to current edition of NEC NFPA 70 or local codes to
minimize personal injury if an electrical fault should occur. In Canada,
refer to the current edition of Canadian Electrical Code CSA C22.1.
This may consist of electrical wire, conduit approved for electrical
ground or a listed, grounded power cord (where permitted by local
code) when installed in accordance with existing electrical codes. Refer
to the power cord manufacturer's ratings for proper wire gauge. Do not
use gas piping as an electrical ground.
VOLTS-
FURNACE SIZE
HERTZ-
PHASE
30040V14
115-60-1
36040V17
115-60-1
36060V14
115-60-1
48060V17
115-60-1
48080V17
115-60-1
60080V21
115-60-1
60100V21
115-60-1
66100V21
115-60-1
66120V24
115-60-1
*. Permissible limits of the voltage range at which the unit operates 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 one way along wire path between furnace and service panel for maximum 2 percent voltage drop.
**. Time-delay type is recommended.
††. Low Amp Kit (KGAPC0101ECM) allows select furnaces to be installed with a 15 Amp Breaker and 14 AWG wire within the listed wire length. Affected data shown as Default
Value/Value with Lower Amp Kit.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 12 – Electrical Data
OPERATING VOLTAGE
MAXIMUM
*
RANGE
UNIT
AMPS
Maximum*
Minimum*
127
104
127
104
127
104
127
104
127
104
127
104
127
104
127
104
127
104
12.6/11.3
Fig. 33 – Typical Field Wiring Diagram
FIRE HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
Do not connect aluminum wire between disconnect switch and furnace.
Use only copper wire. See
ELECTRIC
DISCONNECT
SWITCH
Fig. 34 – Field-Supplied External Electrical Box on Furnace Casing
MINIMUM
UNIT
WIRE SIZE
†
AMPACITY
7.0
9.7
7.4
10.2
7.1
9.8
10.1
13.6
10.0
13.4
13.1
17.3
13.2
17.4
12.5
16.5
††
††
16.6/15.0
12/14
25
WARNING
!
Fig.
34.
COPPER
WIRE ONLY
ALUMINUM
WIRE
MAXIMUM
WIRE LENGTH
‡
AWG
FT (M)
14
38
11.7
14
36
11.1
14
37
11.5
14
27
8.3
14
27
8.4
12
33
10.1
12
33
10.0
12
34
10.6
††
††
34/24
10.5/7.5
A230059
A190279
MAXIMUM
FUSE OR
CKT BKR
**
AMPS
15
15
15
15
15
20
20
20
††
††
20/15
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