Specifications

Refer to the instructions supplied with the
communicating wall control for complete details.
Alternate Power Supplies
This furnace is designed to operate on a utility generated
power which has a smooth sinusoidat 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 furnace electronics.
The alternate power supply must generate the same voltage,
phase, and frequency (Hz) as shown in Table 9 or on the
furnace rating plate.
Power from an alternate power supply that non-sinusoidat may
damage the furnace or cause erratic furnace operation.
manufacturer for
Contact the alternate power supply
specifications and details.
Table 9 Electrical Data - MODULATING (F/G)9MAC
OPERATING VOLTAGE
RANGE*
Maximum* Minimum*
127 104
127 104
127 104
127 104
MAXIMUM
UNIT
AMPS
9.7
9.7
14.8
14.8
UNIT SIZE
60,000
80,000
100,000
120,000
UNIT
AMPACITY#
12.7
12.7
19.1
19.1
MINIMUM
WIRE SIZE
AWG
14
14
12
12
MAXIMUM
WIRE
LENGTH
FT (M)$
29 (8.8)
29 (8.8)
30 (9.1)
30 (9.1)
VOLTS-
HERTZ-
PHASE
115-60-1
115-60-1
115-60-1
115-60-1
MAXIMUM
FUSE OR CKT
BKR
AMPSI"
15
15
20
20
* 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 unit and service panel for maximum 2 percent voltage drop.
Figure 38 1Isolation Relay for Humidifiers with Internal Power Supply
To Humidifier Leads
To Humidifier Leads
O
24 V
Coil
O
I
To HUM TerminalOn I
I
FurnaceControl Board
To Com/24V Screw Terminal
on Thermostat Strip
Figure 39 I Variable Speed Furnace Control - Switch Locations
Al1157
PL4 o
SW-1
SW2 SW3
.q
OAT SW4
30 Specificati ..... bject to change without notice. 440 01 4201 01