NOTE: Furnace combustion-air and vent pipe connections are
sized for 2-in. pipe. Any pipe size change should be made outside
furnace casing in vertical pipe. (See Fig. 32.) This allows proper
drainage of vent condensate.
Combustion-air and vent pipes must terminate together in same
atmospheric pressure zone, either through roof or sidewall (roof
termination preferred), using accessory termination kit.
See Table 5 for required clearances.
Furnace combustion-air and vent pipe connections must be at-
tached as shown in Fig. 33. Combustion-air intake plug fitting and
inducer housing alternate vent cap may need to be relocated in
some applications.
NOTE: Slope combustion-air and vent pipes downwared toward
furnace a minimum of 1/4 in. per linear ft with no sags between
hangers.
Fig. 31—Furnace Control
A02142
BLW
NUETRAL
STATUS CODE LED
SEC-2 SEC-1
EAC-2 L2
FUSE 3-AMP
0.5 AMP@24VAC
HUM
TEST/TWIN
Y1 DHUM G COM W/W1 Y/Y2 R
24V
PLT
120 180
90 150
BLOWER OFF-DELAY
PLT 1
COOL HEAT
SPARE-1 SPARE-2
FAN
EAC-1
1-AMP@
115VAC
PR-1
L1
PL2 1
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC(L2)NEUTRAL
CONNECTIONS
COOL
HEAT
SPARE-1
SPARE-2 FAN
BLOWER SPEED
SELECTION TERMINALS
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
115 VAC (L1) LINE
VOLTAGE CONNECTION
PL2-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
PL1-LOW VOLTAGE MAIN
HARNESS CONNECTOR
TRANSFORMER 24-VAC
CONNECTIONS
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
TWINNING AND/OR
COMPONENT TEST
TERMINAL
BLOWER OFF-DELAY
Table 4—Electrical Data
FURNACE
SIZE
VOLTS—
HERTZ—
PHASE
OPERATING
VOLTAGE RANGE
MAX
UNIT
AMPS
UNIT
AMPACITY†
MIN
WIRE
SIZE
MAX WIRE
LENGTH
(FT)‡
MAX FUSE
OR CKT BKR
AMPS**
Max* Min*
040-08 115-60-1 127 104 6.1 8.4 14 44 15
040-12 115-60-1 127 104 7.3 10.0 14 37 15
060-08 115-60-1 127 104 6.1 8.4 14 44 15
060-12 115-60-1 127 104 7.1 9.8 14 38 15
060-16 115-60-1 127 104 9.5 12.8 14 29 15
080-12 115-60-1 127 104 7.6 10.4 14 36 15
080-16 115-60-1 127 104 10.0 13.4 14 28 15
080-20 115-60-1 127 104 14.1 18.4 12 31 20
100-16 115-60-1 127 104 10.2 13.5 14 27 15
100-20 115-60-1 127 104 14.8 19.3 12 30 20
120-20 115-60-1 127 104 14.6 19.1 12 30 20
140-20 115-60-1 127 104 14.3 18.8 12 30 20
* Permissible limits of voltage range at which unit will operate 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 a measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
** Time-delay type is recommended.
24
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