Maytag POF1HD140AVFA Operations Instructions download pdf (Page 8)

20. MAINTENANCE AND SERVICE

Routine Maintenance By Home Owner

Other than remembering to arrange for the annual

professional servicing of the furnace by the service or

installation contractor, the most important routine service

performed by the homeowner is to maintain the air filter

or filters. A dirty filter can cause the furnace to over-heat,

fail to maintain indoor temperature during cold weather,

increase fuel consumption and cause component failure.

The furnace filter(s) should be inspected, cleaned or

replaced monthly. The furnace is factory equipped with a

semi-permanent type filter. If the filter is damaged,

replace with filters of the same size and type. (See Parts

Listing Ref. No. 21).

During the routine service, inspect the general condition

of the furnace watching for signs of oil leaks in the vicinity

of the oil burner, soot forming on any external part of the

furnace, soot forming around the joints in the vent pipe,

etc. If any of these conditions are present, please advise

your service or installation contractor.

Annual Service By Contractor

THE COMBUSTION CHAMBER (FIREPOT) IS

FRAGILE. USE CARE WHEN INSPECTING AND

CLEANING THIS AREA.

The heat exchanger should be inspected periodically and

cleaned if necessary. If cleaning is necessary, SHUT

OFF POWER TO THE FURNACE and remove the

burner. Using a stiff brush with a wire handle, brush off

scale and soot from inside the drum and flue pipe. To

clean the radiator, remove the clean-out caps screws,

and remove the caps carefully to avoid tearing the

gaskets. A wire brush can be used to loosen dirt and

debris on the inside surfaces of the radiator. Clean out all

accumulated dirt, soot and debris with a wire handled

brush and an industrial vacuum cleaner. Before replacing

the clean-out caps, inspect the gaskets. If the gaskets

are broken, remove the remnants and replace with new

gaskets.

The blower motor is factory oiled and permanently

sealed. DO NOT LUBRICATE. Excess oil causes

premature electric motor failure.

Inspect the blower fan. Clean if necessary.

Oil Burner Maintenance: Follow the instructions of the oil

burner manufacturer. (See oil burner manufacturer's

instructions supplied with furnace or burner). It is

advisable to change the oil burner nozzle and oil filter on

an annual basis.

The venting system should be cleaned and inspected for

signs of deterioration. Replace pitted or perforated vent

pipe and fittings. The barometric damper should

open and close freely.

All electrical connections should be checked to

ensure tight connections. Safety controls such as

the high limit controls should be tested for

functionality. The fan control should be checked to

ensure that the fan on and off delay function

continues to start and stop the blower fan at the

optimal settings.

21. OPERATING INSTRUCTIONS

(POF1HD140AVFA and POF1HD091AVFA)

Before Lighting

Open all supply and return air registers and grilles.

Open all valves in oil pipes. Turn on electric power

supply

To Light Unit

Set the thermostat above room temperature to call

for heat. The burner should start. NOTE: It may be

necessary to press the RESET button on the

primary combustion control relay.

There will be a fan on time delay before the

circulating fan is energized. The United

Technologies 1168-1 has an adjustable fan on/off

time delay that is programmed into the ECM motor,

and is set by selecting the SW4 DIP switch

combination displayed in Table A-10 page 15. Fan

on/off delay must be adjusted according to input

(nozzle size).

Set the thermostat below room temperature. The oil

burner should stop.

The air circulation blower will continue to run until

the blower off delay setting programmed into the

ECM motor times out.

To check the operation of the limit switch, shut off

power to the furnace. Temporarily remove the 5 pin

power connector plug from the ECM blower motor.

NOTE: Isolate the AC Line pins on the 5 pin

power connector with electrical tape to prevent

electric shock hazard. Restore the electrical

power to the furnace and set the thermostat above

room temperature.

After three or four minutes of burner operation, the

limit control should turn the burner off. When the

limit function test is complete, shut off electrical

power to the furnace, replace the 5 pin power plug to

the blower fan motor, and then restore power. The

blower fan will start up immediately. Once the

temperature has dropped and the limit control has

reset, the fan will operate until the fan off time is

achieved. The oil burner will then resume operation

and continue until the thermostat is satisfied.

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Maytag POF1HD140AVFA Operations Instructions Page 8

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