Instruction manual

34
Table 9 – Electrical Data
TWO---STAGE PWM FURNACES
UNIT SIZE V O LT S ---
H E R T Z ---
PHASE
OPERATING VOLTAGE
RANGE*
MAXIMUM
UNIT
AMPS
UNIT
AMPACITY#
MINIMUM
WIRE
SIZE
AWG
MAXIMUM
WIRE
LENGTH
FT (M)}
MAXIMUM
FUSE OR C KT
BKR
AMPS{
Maximum* Minimum*
40,000 1 1 5 --- 6 0 --- 1 127 104 8.2 11.0 14 33 (10.0) 15
60,000 1 1 5 --- 6 0 --- 1 127 104 9.8 13.0 14 28 (8.5) 15
80,000 1 1 5 --- 6 0 --- 1 127 104 9.8 13.0 14 28 (8.5) 15
100,000 1 1 5 --- 6 0 --- 1 127 104 12.3 16.1 12 35 (10.6) 20
120,000 1 1 5 --- 6 0 --- 1 127 104 12.3 16.1 12 35 (10.6) 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 l oad 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.
J−B OX
MOUNTING
SCREWS
J−BO X
MOUNTING
BRACKET
GROUND
SCREW
J−BOX COVER
A11299
Fig. 31 -- Installing J--Box (When Used)
COPPER
WIRE ONLY
ELECTRIC
DISCONNECT
SWITCH
ALUMINUM
WIRE
GROUND
NEUTRAL
LINE VOLTAGE
A11146
Fig. 32 -- Field--Supplied Electrical Box on Furnace Casing
986TA