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Accessories
(See Fig. 33 and 35.)
1. Electronic Air Cleaner (EAC)
Connect an accessory Electronic Air Cleaner (if used) using
1/4- -in. female quick connect terminals to the two male
1/4- -in. quick- -connect terminals on the control board
marked EAC- -1 and EAC- -2. The terminals are rated for
115VAC, 1.0 amps maximum and are energized during
blower motor operation.
2. Humidifier (HUM)
The HUM terminal is a 24 VAC output, energized when the gas
valve relay is operating during a call for heat.
Connect an accessory 24 VAC, 0.5 amp. maximum humidifier (if
used) to the ¼- -in. male quick- -connect HUM terminal and
COM- -24V screw terminal on the control board thermostat strip.
NOTE: If the humidifier has its own 24 VAC power supply, an
isolation relay may be required. Connect the 24 VAC coil of the
VOLTS---
HERTZ---
UNIT SIZE
PHASE
30040
115--- 60--- 1
36040
115--- 60--- 1
36060
115--- 60--- 1
42060
115--- 60--- 1
48080
115--- 60--- 1
60080
115--- 60--- 1
60100
115--- 60--- 1
66120
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.
Time ---delay type is recommended.
{
Length shown is as measured one way along wire path between furnace and service panel for maximum 2 percent voltage drop.
}
Table 11 – Electrical Data
OPERATING VOLTAGE
MAXIMUM
RANGE*
UNIT
AMPS
Maximum*
Minimum*
127
104
127
104
127
104
127
104
10.7
127
104
10.1
127
104
13.1
127
104
13.5
127
104
12.0
isolation relay to the HUM and COM/24V screw terminal on the
control board thermostat strip. See Fig. 33.
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) as shown in Table 11 or the furnace rating plate.
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.
MINIMUM
UNIT
AMPACITY#
7.5
10.3
7.5
10.3
7.6
10.4
14.3
13.5
17.3
17.7
15.9
35
MAXIMUM
MAXIMUM
WIRE
WIRE
FUSE OR CKT
SIZE
LENGTH
BKR
AWG
FT (M)}
AMPS{
14
36 (11.0)
14
36 (11.0)
14
35 (10.7)
14
26 (7.9)
14
27 (8.2)
12
33 (10.1)
12
32 (9.8)
12
36 (11.0)
15
15
15
15
15
20
20
20
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