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935SB: Installation, Start-up, Operating and Service Maintenance Instructions
Alternate Power Supplies
This furnace is designed to operate on utility generated power which has
a smooth sinusoidal waveform. If the furnace is to be operated on a
generator or other alternate power supply, the alternate power supply
must produce a smooth sinusoidal waveform for compatibility with the
furnace electronics. The alternate power supply must generate the same
voltage, phase, and frequency (Hz)
Power from an alternate power supply that is non-sinusoidal may
damage the furnace electronics or cause erratic operation.
Contact the alternate power supply manufacturer for specifications and
details.
Fig. 41 – Typical Single-Stage Wiring Diagram
VOLTS-
FURNACE SIZE
HERTZ-
PHASE
36040M17
115-60-1
48060M17
115-60-1
60080M21
115-60-1
60100M21
115-60-1
66100M21
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.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
(Table
13) or the furnace rating plate.
Table 13 – Electrical Data
OPERATING VOLTAGE
*
RANGE
Maximum
Minimum
127
104
127
104
127
104
127
104
127
104
Fig. 42 – Example of Single Stage Furnace Control
A190079
MAXIMUM
UNIT
UNIT
AMPACITY
AMPS
8.8
11.5
11.5
14.8
13.8
17.7
13.8
17.7
13.8
17.7
27
MAXIMUM
MINIMUM
WIRE
WIRE SIZE
†
LENGTH
AWG
‡
FT (M)
14
32 (9.8)
14
25 (7.6)
12
32 (9.9
12
32 (9.9)
12
32 (9.9)
A220965
MAXIMUM FUSE
OR CKT BKR
**
AMPS
15
15
20
20
20
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