-- 33 --
BLOWER OFF-DELAY
T1 DHUM G COM W TIT2 R
24V
TEST / TWIN
HUH
PL
T
SEC-2
SEC-1
COM
24VAC
PL1
24V HTR T
APS
COM
HEAT
COOL
FAN
SPARE 2 SPARE 1
EAC-2
EAC-1
L1
BL-1
PR-1
PL2
BLOWER OFF-DELAY
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION
& DIAGNOSTIC LIGHT
BLOWER SPEED
SELECTION
TERMINALS
115-VAC (L2)
NEUTRAL
CONNECTIONS
115-VAC (LI)
NUETRAL
CONNECTIONS
EAC-1 TERMINAL
(115-VAC 1.0 AMP. MAX0
PL1-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTION
PL1-LOW VOLTAGE
DRAIN HARNESS
CONNECTOR
TRANSFORMER
24-VAC CONNECTIONS
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP. MAX)
TWINNING AND/OR
COMPONENT TEST
TERMINAL
A08345
Fig. 36 -- Furnace Control
For Non-Direct Vent (1-Pipe) system, combustion-air must
terminate outside of furnace casing with 1 elbow. Orient elbow so
that its opening faces down for upflow or downflow applications.
Orient elbow so that its opening faces sideways (left or right) for
horizontal left or horizontal right applications (See Fig. 37.)
Maintain a 3-in minimum clearance between the opening of the
combustion-air inlet pipe and any object.
UNIT CORROSION HAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Combustion air must not be taken from inside structure
because inside air is frequently contaminated by halogens,
which include fluorides, chlorides, bromides, and iodides.
These elements are found in aerosols, detergents, bleaches,
cleaning solvents, salts, air fresheners, adhesives, paint, and
other household products. Locate combustion-air inlet as far as
possible from swimming pool and swimming pool
pump house.
CAUTION
!
NOTE
: All pipe joints must be cemented, with the exception of
combustion--air pipe to inlet housing connection, as it may be
necessary to remove pipe for servicing.
Assembly of Combustion Air Pipe (Non-Direct Vent/1-Pipe
System ONLY)
1. Permanently
install
perforated
disk
assembly
(factory-supplied in loose parts bag) in combustion-air
elbow using RTV or by cementing, as shown in Fig. 38.
For proper combustion disk usage, please refer to Table
11.
2. Determine the length of straight portion of combustion-air
inlet pipe from Fig. 38.
3. Cut field-supplied 2-in. (51 mm) diameter PVC pipe to
length as determined per Fig. 38.
4. Permanently attach elbow/perforated disk assembly to
straight portion of pipe using RTV or by cementing as
shown in Fig. 38.
Assembly of Combustion Air Pipe (Direct Vent-2-Pipe
System ONLY)
1. Using Table 11, individually determine the diameter of the
combustion--air and vent pipe allowed. If different sizes,
pick the larger of the two diameters and use this diameter
for both combustion--air and vent pipes.
2. When installing vent systems of short pipe length, use the
smallest allowable pipe diameter. use of pipe size greater
than required may result in incomplete combustion, flame
disturbance, and flame sense lockout.