Amana AMH95 Instruction Manual download pdf (Page 32)

XIX. MAINTENANCE

WARNING

O AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL

POWER BEFORE PERFORMING ANY MAINTENANCE. IF YOU MUST HANDLE THE

IGNITER, HANDLE WITH CARE.

OUCHING THE IGNITER ELEMENT WITH BARE

FINGERS, ROUGH HANDLING, OR VIBRATION COULD DAMAGE THE IGNITER

RESULTING IN PREMATURE FAILURE.

NLY A QUALIFIED SERVICER SHOULD

EVER HANDLE THE IGNITER.

ANNUAL INSPECTION

The furnace should be inspected by a qualified installer, or service

agency at least once per year. This check should be performed at

the beginning of the heating season. This will ensure that all fur-

nace components are in proper working order and that the heating

system functions appropriately. Pay particular attention to the fol-

lowing items. Repair or service as necessary.

• Flue pipe system. Check for blockage and/or leakage. Check

the outside termination and the connections at and internal

to the furnace.

• Heat exchanger. Check for corrosion and/or buildup within

the heat exchanger passageways.

• Burners. Check for proper ignition, burner flame, and flame

sense.

• Drainage system. Check for blockage and/or leakage.

Check hose connections at and internal to furnace.

• Wiring. Check electrical connections for tightness and/or

corrosion. Check wires for damage.

• Filters.

FILTERS

CAUTION

O ENSURE PROPER UNIT PERFORMANCE, ADHERE TO THE FILTER SIZES

GIVEN IN THE

RODUCT

ATA

OOK APPLICABLE TO YOUR MODEL*.

MAINTENANCE

Improper filter maintenance is the most common cause of inad-

equate heating or cooling performance. Filters should be cleaned

(permanent) or replaced (disposable) every two months or as re-

quired. When replacing a filter, it must be replaced with a filter of

the same type and size.

FILTER REMOVAL

Depending on the installation, differing filter arrangements can be

applied. Filters can be installed in either the central return register

or a side panel external filter rack (upflow only). A media air filter or

electronic air cleaner can be used as an alternate filter. Follow the

filter sizes given in the Recommended Minimum Filter size table to

ensure proper unit performance.

To remove filters from an external filter rack in an upright upflow

installation, follow the directions provided with external filter rack

kit. To remove internal filters see Internal Filter Removal section.

Internal filters are an accessory item and are not included with

your furnace. For further details, see your distributor.

HORIZONTAL U NIT F ILTER R EMOVAL

Filters in horizontal installations are located in the central return

To remove:

1. Turn OFF electrical power to furnace.

2. Remove filter(s) from the central return register or ductwork.

3. Replace filter(s) by reversing the procedure for removal.

4. Turn ON electrical power to furnace.

MEDIA AIR F ILTER OR ELECTRONIC AIR C LEANER REMOVAL

Follow the manufacturer’s directions for service.

BURNERS

Visually inspect the burner flames periodically during the heating

season. Turn on the furnace at the thermostat and allow several

minutes for flames to stabilize, since any dislodged dust will alter

the flames normal appearance. Flames should be stable, quiet,

soft, and blue (dust may cause orange tips but they must not be

yellow). They should extend directly outward from the burners with-

out curling, floating, or lifting off. Flames must not impinge on the

sides of the heat exchanger firing tubes.

INDUCED D RAFT AND CIRCULATOR B LOWERS

The bearings in the induced draft blower and circulator blower

motors are permanently lubricated by the manufacturer. No further

lubrication is required. Check motor windings for accumulation of

dust which may cause overheating. Clean as necessary.

CONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED SERVICER

ONLY)

Annually inspect the drain tubes, drain trap, and field-supplied drain

line for proper condensate drainage. Check drain system for hose

connection tightness, blockage, and leaks. Clean or repair as

necessary.

FLAME SENSOR (QUALIFIED SERVICER ONLY)

Under some conditions, the fuel or air supply can create a nearly

invisible coating on the flame sensor. This coating acts as an

insulator causing a drop in the flame sense signal. If the flame

sense signal drops too low the furnace will not sense flame and

will lock out. The flame sensor should be carefully cleaned by a

qualified servicer using emery cloth or steel wool. Following clean-

ing, the flame sense signal should be 1 to 6 microamps at 115

volts.

IGNITER (QUALIFIED SERVICER ONLY)

If the igniter and the surrounding air are at about 70°F and the

igniter wires are not connected to any other electrical components,

the resistance of the igniter should not exceed 75 ohms. If it does,

the igniter should be replaced.

FLUE PASSAGES (QUALIFIED SERVICER ONLY)

The heat exchanger flue passageways should be inspected at the

beginning of each heating season. If necessary, clean the pas-

sageways as outlined below.

1. Turn OFF the electrical power and gas supply to the furnace.

2. Disconnect the gas line and remove the burner/ manifold

assembly by removing the screws securing the assembly

to the partition panel.

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Amana AMH95 Instruction Manual Page 32

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