Subject to change without notice. Printed in U.S.A. 435337-XUM-A-0209
Copyright © 2009 by Johnson Controls, Inc. All rights reserved. Supersedes: Nothing
Johnson Controls Unitary Products
5005 York Drive
Norman, OK 73069
Every time the external air filters are changed the following items should
be visually inspected:
• Check combustion air and vent pipe for blockage or leakage.
• Check all components to be sure they are in good condition and
that there are no obvious signs of deterioration.
• Check the drain lines to make sure there are no cracks or leaks.
• Check for dirt or lint on any surfaces or on components. Do not try
to clean any of the surfaces or components. Cleaning of the fur-
nace and its components must be done by a qualified service pro-
fessional.
If during the inspection of your furnace, you find any of the following
conditions:
• Excessive amounts of dust and lint on components.
• Damaged or deteriorated components or surfaces.
• Leaks or blockage in the vent pipe passages.
• Water on any surface inside or outside of the furnace.
Do not operate the furnace, call a certified dealer or servicing contractor
to check or clean your furnace, or for more information if you have
questions about the operation of your furnace.
If all components appear to be in good operating condition, replace the
furnace access panels/doors. Turn ON the gas and electrical power
supplies to the furnace, and set thermostat to the desired temperature.
How to Clean your Filter
High-velocity filters may be cleaned with a vacuum cleaner or washed
with a garden hose. Be sure to shake off excess water and allow filter to
completely dry before re-installing the filter.
Replace throw away filter(s) with the same size new filter(s). Throw
away filter(s) may be replaced with cleanable filter(s) at this time.
BLOWER CARE
Even with good filters properly in place, blower wheels and motors will
become dust laden after months of operation. The entire blower assem-
bly should be inspected annually. This service must be performed by a
qualified service agency.
NOTE: The spring-loaded safety cut-off switch, mounted at the blower
deck will automatically cut off the electrical power supply to the furnace
when the furnace blower access panel/door is removed. As a safety
precaution, all electrical power and the gas supply to the furnace should
be turned off before servicing.
MOTOR LUBRICATION
The motors in these furnaces are permanently lubricated, and do not
require periodic oiling.
SECTION V: SERVICE INFORMATION
TROUBLESHOOTING PROBLEMS
If your furnace is not operating correctly, the following visual checks
should be made before contacting your local contractor, dealer, or ser-
vice provider.
1. Check that electrical power to the furnace is turned on.
2. Check that the manual gas shut-off valve in the gas piping supply
is turned to the ON position. Refer to Figure 5.
3. Check that the ON/OFF switch on the gas valve is turned to the
ON position. Refer to Figure 4.
4. Check that the furnace blower access panel/door is correctly posi-
tioned. The electrical power supply will be cut off if this door is
removed.
FURNACE CONTROL DIAGNOSTICS
The electronic furnace control supplied on this furnace is equipped with
a diagnostic light which flashes when there is a service problem with the
furnace. The number of times the light flashes indicates the location of
the problem, as listed below:
One flash - Ignition failure -- Check for proper gas flow and gas pres-
sure, gas valve operation and flame sensor operation. Check for proper
location of ignitor.
Two flashes - Pressure switch stuck closed. Check for shorted wires,
bad pressure switch.
Three flashes - Pressure switch failed to close -- Check vent blower,
pressure switch, vent blockage, disconnected pressure hose.
Four flashes - Limit switch open -- Check for open limit switch, open
rollout switch, loose connections in limit circuit.
Five flashes - False flame sense -- Check for stuck open gas valve.
Six flashes - Reversed polarity -- Check polarity.
FURNACE MAINTENANCE - DEALER/CONTACTOR
The furnace should be cleaned and adjusted by a certified dealer or
qualified service contractor once a year or before the start of every
heating season. The following items must be cleaned and serviced or
replaced if there are signs of deterioration.
1. The vent terminal.
2. The furnace vent and combustion air intake passageways. Should
it be necessary to service the vent/air intake system, the manufac-
turer recommends this service be conducted by a qualified service
agency. The operation of this appliance requires the reassembly
and resealing of the vent/air intake system.
3. The furnace burners, ignitor and flame sensor.
4. The condensate collection and disposal system. If any disassem-
bly of components containing flue or vent gases is required, a
qualified service agency must perform the service.
5. Heat exchanger assembly.
6. Induced draft motor assembly.
REPLACEMENT PARTS LIST
All components, assemblies, accessories, and replacement parts for
this furnace are available through qualified service agencies. It is not
recommended that the user purchase, install, or replace any compo-
nents of this furnace. Contact your local contactor, dealer, or service
provider for additional information.
WIRING DIAGRAM
The unit wiring diagram may be found on the inside of one of the access
panels on the furnace. It is intended for reference only. If service is
required, contact your local contactor, dealer, or service provider.
Make sure you DO NOT move the clip on weight on the
indoor fan wheel when cleaning the wheel. This weight is
used to balance the wheel. Moving the weight will cause
the fan wheel to vibrate.
