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BLOWER OFF-DELAY
J2 JUMPER
TWiNNiNG
AND/OR
COMPONENT
TEST
TERMINAL
24-V TH ERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION
&
DiAGNOSTiC
LIGHT
115-VAC(L2)N EUTRAL --'11
CONNECTIONS
SEC-2 8EC-1
HUMiDIFiER
TERMINAL
(24-VAC 0.5 AMP MAX.)
TRANSFORMER
24-VAC
CONNECTIONS
ob
PL1-LOW VOLTAGE MAiN
HARNESS
CONNECTOR
SELECTION TERMINALS
PL2-HOT SURFACE
VOLTAGE CONNECTION
IGNITER & INDUCER
_./
EAC-1 TERMINAL
MOTOR CONNECTOR
15AiAC 1.0 AMP MAX.)
Fig. 31--Control
Board
A02100
system or connector must be sized to approach minimum size as
detem_ined using appropriate
table fbund in the NFG(
or NSC°
NGPIC.
COMBUSTION=AIR
AND VENT PIPING
General
Combustion°air and vent pipe, fittings, primers, and solvents must
confom_ to American
National Standards Institute (ANSI) stan=
dards and American
Socie w for Testing and Materials (ASTM)
standards See Table (5fbr approved materials fPr use in the U.SA
In (anada, constluct all combustion-aft and vent pipes fbr this unit
of (SA
or ULC listed schedule40
PV(,
PVC°DWV or ABS°
DWV pipe and pipe cement
SDR pipe is NO7
approved in
( anada.
(
NOT IN
HORIZONTAL
SECTION
FURNACE
TRANSITION IN
VERTICAL SECTION
See Table 7 for maximum
pipe lengths
and Fig. 36, 37, 38, 39, and
40 fbr exterior piping
an'angements
NOTE:
Fm'nace
combustion°air
and vent
pipe
connections
are
sized fbr 2-in. pipe. Any pipe size change
should be made outside
furnace
casing
in vertical
pipe. (See Fig. 320 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
prefBrred),
using
accessory
tem_ination
kit.
24
A93034
Fig. 32--Combustion-Air
and Vent
Pipe
Diameter
Transition
Location
and
Elbow
Configuration
See Table
5 %r required
clearances
Furnace
combustion-air
and vent
pipe
connections
must
be at-
tached
as shown in Fig. 33 (ombustion=air
intake plug fitting
and
inducer
housing
alternate
vent
cap may need
to be relocated
in
some applications.
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