39
Table 11 – Electrical Data
TWO-STAGE ECM FURNACES
UNIT SIZE VOLTS-
HERTZ-
PHASE
OPERATING VOLTAGE
RANGE*
MAXIMUM
UNIT
AMPS
UNIT
AMPACITY#
MINIMUM
WIRE
SIZE
AWG
MAXIMUM
WIRE
LENGTH
FT (M)}
MAXIMUM
FUSE OR CKT
BKR
AMPS{
Maximum* Minimum*
42060 115-60-1 127 104 8.5 11.5 14 32 (9.8) 15
42080 115-60-1 127 104 8.5 11.5 14 32 (9.8) 15
60080 115-60-1 127 104 13.6 17.9 12 32 (9.8) 20
66100 115-60-1 127 104 13.7 18.0 12 31 (9.4) 20
66120 115-60-1 127 104 13.7 18.0 12 31 (9.4) 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 furnace and service panel for maximum 2 percent voltage drop.
A12226
Fig. 34 − Installing J−Box (When Used)
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
GROUND
NEUTRAL
LINE VOLTAGE
A11146
Fig. 35 − Field−Supplied External Electrical Box on Furnace
Casing
986TB
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