4
Install the Blower Assembly
1. Align the blower assembly with the rails in the blower deck
and push backward to slide the blower into the blower com-
partment.
2. If the furnace is installed in the downflow position, raise the
blower up slightly to prevent the blower assembly from
catching on the blower deck.
3. Install the two screws that attach the blower assembly to the
blower deck.
Vent Pipe Installation
1. Insert the vent and combustion air pipes through the furnace
casing and through the grommets mounted to the blower
deck.
2. Insert the vent pipe into the outlet of the vent elbow.
3. Install the screws for the vent pipe adapter external to the
furnace casing.
4. Tighten the clamp for the vent pipe at vent elbow on the
inducer assembly 15 lb--in.
5. Tighten the clamp around the grommet on the blower deck
for the vent pipe.
6. Install the screws for the combustion air pipe adapter extern-
al to the furnace casing.
7. Tighten the clamp around the grommet on the blower deck
for the combustion air pipe.
NOTE
: If the grommets at the blower deck are damaged during
disassembly, replace the grommets. Do not operate the furnace
without grommets that seal the vent and combustion air pipes at the
blower deck.
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or
death.
To route the vent pipe and combustion air pipe through the
furnace, the manufacturer supplied kit must be used. Failure to
properly seal the blower compartment from the furnace vestibule
could result in the circulation of carbon monoxide throughout
the structure. The vent pipe and combustion air pipe must be a
continuous pipe while passing through the blower compartment.
Seals supplied in this kit must be installed per the instructions
provided. Follow all procedures outlined in these instructions.
8. Align the remaining vent pipe system to the vent pipe sup-
port on the vent pipe adapter external to the furnace.
9. Tighten the clamp on the vent pipe support 15 lb--in.
10. Align the remaining combustion air pipe system to the com-
bustion air pipe support on the adapter external to the fur-
nace.
11. Tighten the clamp on the combustion air pipe support 15
lb--in.
12. If the pipes were cut external to the furnace, prime and
solvent cement the pipes as required for the type of material
used.
Unit Checkout
!
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
Never purge a gas line into a combustion chamber. Never test for
gas leaks with an open flame. Use a commercially available soap
solution made specifically for the detection of leaks to check all
connections. A fire or explosion may result causing property
damage, personal injury or loss of life.
!
WARNING
RISQUE D’EXPLOSION ET D’INCENDIE
Le non--respect des avertissements de sécurité pourrait
d’entraîner des blessures graves, la mort ou des dommages
matériels.
Ne jamais utiliser une flamme nue por vérifier la présence des
fuites de gaz. Pour la vérification de tous les joints, utiliser plutôt
une solution savonneuse commerciale fabriquée spécifiquement
pur la détection des fuites de gaz. Un incendie ou une explosion
peut entraîner des dommages matériels, des blessures ou la mort.
1. Set thermostat to “OFF.”
2. Turn on power at external disconnect, fuse or circuit break-
er.
3. Turn on gas at external shut--off or gas meter.
4. Check for gas leaks with a commercially available soap
solution made specifically for the detection of leaks to
check all connections.
5. Manually close blower door switch.
6. Initiate component test through circuit board by referring to
“Component Test”
on status code label on blower access
door for complete test sequence information.
7. If any status codes are flashed, refer to status code label on
unit blower door.
8. Turn thermostat fan switch to “ON”, “Continuous” or jump-
er R to G terminals at furnace control board.
9. Check for air leakage around cell panel. It may be necessary
to remove heat exchanger assembly and top gasket between
cell panel and furnace casing top plate. Re--install and re--
check for blower air leaks.
10. Remove jumper(s) or set thermostat fan to “Auto” or
“OFF.”
11. Release blower door switch.
12. Install blower access door.
13. Set thermostat to call for heat.
14. Allow unit to initiate a complete call for heat cycle.
15. Check for air leakage around collector box. A whistling
noise may indicate air leak in collector box seal.
NOTE
: If there is a severe air leak in the collector box seal,
pressure switch may not close or will re--open, resulting in no
ignition or erratic burner operation.
NOTE
: As part of the system check--out, verify that the following
conditions are not affecting the operation of the furnace:
S
Short Cycling--Defective thermostat: Incorrect thermostat
anticipator setting, dirty filter or over--sized furnace.
S
Under firing/low btu input: Set manifold pressure and verify
firing rate as shown on rating plate by clocking the gas meter.
S
Overfiring/high btu input: Set manifold pressure and verify
firing rate as shown on rating plate by clocking the gas meter.
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