Circulating Air Filters - Goodman GMP Installation & Operating Instructions Manual

Power vented multi-position gas furnace

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Installation & operating instructions manual (18 pages)

Table Of Contents

Table of Contents

One of the most common cause of a problem in a forced air heating system is a blocked or dirty

filter. Circulating air filters must be inspected monthly for dirt accumulation and replaced if neces-

sary. Failure to maintain clean filters can cause premature heat exchanger failure.

A new home may require more frequent replacement until all construction dust and dirt is re-

moved. Circulating air filters are to be installed in the return air duct external to the furnace cabi-

net.

Before performing any service on this furnace, including checking or replacing circulating air filters

- disconnect the main power supply.

DO NOT operate the furnace without circulating air filters in place.

FURNACE INPUT

45M

75M

100M

125M

150M

45M

75M

100M

125M

150M

PERMANENT NOMINAL 600 C.F.M.

The temperature difference between the supply air and the return air of the furnace is known as

the temperature rise. This furnace is designed to operate within the temperature rise range dis-

played on the furnace series and rating plate. To ensure satisfactory performance, the tempera-

ture rise of the furnace must be measured and if necessary adjusted. Use the following procedure

to measure and adjust the temperature rise:

• Before starting the furnace visually inspect all joints and seams in the supply and return air

ducts for leaks. Repair them if necessary.

• Adjust the room thermostat to obtain constant operation.

• Allow the furnace to operate for at least fifteen (15) minutes.

• With an accurate thermometer measure the temperature at the return air. If a combination in-

door / outdoor system is used, the temperature must be measured downstream of the connec-

tion.

• Measure the outlet air tempreture at a point approximately twelve to eighteen (12 -18) inches

from the furnace in the supply air duct work. It may be necessary to measure the outlet air at

several places to obtain an accurate average. NOTE: IF AN AIR CONDITIONING COIL IS

INSTALLED, TAKE CARE SO AS NOT TO DAMAGE THAT COIL.

• Adjust the temperature by changing circulating air blower speed tap. Increasing the motor

speed lowers the temperature rise while lowering the motor speed increases the temperature

rise.

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