American Standard TDE060A936M, Service Manual

Page B-635-422

5

Service Facts

PERIODIC SERVICING REQUIREMENTS

1. GENERAL INSPECTION — Examine the furnace

installation annually for the following items:

a. All flue product carrying areas external to the furnace

(i.e. chimney, vent connector) are clear and free of
obstruction.  A vent screen in the end of the vent (flue)
pipe must be inspected for blockage annually.

b. The vent connector is in place, slopes upward and is

physically sound without holes or excessive corrosion.

c. The return air duct connection(s) is physically sound,

is sealed to the furnace and terminates outside the
space containing the furnace.

d. The physical support of the furnace should be sound

without sagging, cracks, gaps, etc., around the base so
as to provide a seal between the support and the base.

e. There are no obvious signs of deterioration of the

furnace.

2. FILTERS — Filters should be cleaned or replaced (with

high velocity filters only), monthly and more frequently
during high use times of the year such as midsummer or
midwinter.

3. BLOWERS — The blower size and speed determine the

air volume delivered by the furnace. The blower motor
bearings are factory lubricated and under normal
operating conditions do not require servicing.  If motor
lubrication is required it should only be done by a
qualified servicer.  Annual cleaning of the blower wheel
and housing is recommended for maximum air output,
and this must be performed only by a qualified servicer
or service agency.

4. IGNITER — This unit has a special hot surface direct

ignition device that automatically lights the burners.
Please note that it is very fragile and should be handled
with care.

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WARNING

!

Do not touch igniter. It is extremely hot.  Failure to follow
this warning could result in severe burns.

5. BURNER — Gas burners do not normally require

scheduled servicing, however, accumulation of foreign
material may cause a yellowing flame or delayed igni-
tion. Either condition indicates that a service call is
required. For best operation, burners must be cleaned
annually using brushes and vacuum cleaner.

Turn off gas and electric power supply. To clean burners,
remove the top burner bracket. Lift burners from
orifices.

NOTE:
Be careful not to break igniter when removing burners.

Clean burners with brush and/or vacuum cleaner.
Reassemble parts by reversal of the above procedure.

NOTE:
On LP (propane) units, some light yellow tipping of the
outer mantle is normal. Inner mantle should be bright blue.

Natural gas units should not have any yellow tipped flames.
This condition indicates that a service call is required. For
best operation, burners must be cleaned annually using
brushes and vacuum cleaner.

NOTE:
On LP (propane) units, due to variations in BTU content
and altitude, servicing may be required at shorter intervals.

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WARNING

!

CARBON MONOXIDE POISONING HAZARD

Failure to follow the installation instructions for the venting
system being placed into operation could result in carbon
monoxide poisoning or death.

6. HEAT EXCHANGER/FLUE PIPE — These items must

be inspected for signs of corrosion, and/or deterioration
at the beginning of each heating season by a qualified
service technician and cleaned annually for best opera-
tion. To clean flue gas passages, follow recommendations
below:

a. Turn off gas and electric power supply.

b. Inspect flue pipe exterior for cracks, leaks, holes or

leaky joints.

c. Remove burner compartment door from furnace.

d. Inspect around insulation covering flue collector box.

Inspect induced draft blower connections to the flue
pipe connection.

e. Remove burners. (See 4.)

f. Use a mirror and flashlight to inspect interior of heat

exchanger, be careful not to damage the igniter, flame
sensor or other components.

g. If any corrosion is present, contact a service agency.

Heat exchanger should be cleaned by a qualified
service technician.

h. After inspection is complete replace burners and

furnace door.

i. Restore gas supply. Check for leaks using a soap

solution. Restore electrical supply. Check unit for
normal operation.

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WARNING

!

FIRE OR EXPLOSION HAZARD

Failure to follow the safety warnings exactly could result in
serious injury, death or property damage.

Never test for gas leaks with an open flame.  Use a com-
mercially 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.

7. COOLING COIL CONDENSATE DRAIN — If a cooling

coil is installed with the furnace, condensate drains
should be checked and cleaned periodically to assure
that condensate can drain freely from coil to drain. If
condensate cannot drain freely water damage could
occur.  (See Condensate Drain in Installer’s Guide)

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CAUTION

!

Label all wires prior to disconnection when servicing
controls.  Wiring errors can cause improper and dangerous
operation.

Verify proper operation after servicing.