Lennox International Inc G21 V SERIES, G21Q manual Servicing the Filter, Lubrication, Service

GAS PIPING

MANUAL MAIN

SHUT-OFF VALVE

AUTOMATIC

GAS VALVE

GROUND

JOINT

UNION

RIGHT SIDE PIPING DRIP LEG

GAS CONNECTOR

FIGURE 4

FOR UNIT TO

OPERATE DISCONNECT

SWITCH MUST

BE IN •ON" POSITION

TYPICAL

FUSE/DISCONNECT

SWITCH BOX MOUNTED

ON FURNACE

FIGURE 5

Servicing the Filter

Inspect and clean air filters each month. Filters must be cleaned when dirty to assure proper furnace op. eration and maintain efficiency.

A-Cleaning Reusable Foam Filter

1- Turn off electrical power to furnace.

2- Remove blower access panel. Wait for blower to stop.

3- Remove filter by sliding up and out of channel.

4- Wash filter with water and a mild detergent. For in3 creased efficiency, filter media should be sprayed with Filter Handicoater when dry. Filter Handicoater is RP products No. 418 and is available as Lennox part No. P-8-5069. See table 1 for replacement filters.

	TABLE 1
G21 Model No.	Filter Size	Filter Part
		No.
All Q-40,-60,	16" x 25"
Q3-80, Q4-80 and		P-8-7822
	(406 x 635mm)
V3-60, -80 units
Q5-80 and all	20" x 25"
Q-100 units: and		P-8-7831
	(508 x 635mm)
V5-80,-100 units

5- Reinstall filter. Slide filter into top channel and drop into lower channel.

IMPORTANT-Do not replace foam reusable filters with throw-away type filters.

6- Replace blower access panel.

Lubrication

Motors are prelubricated for extended bearing life; no further lubrication is required.

Service

At the beginning of each heating season, the system should be checked as follows:

1- Examine the termination ends of the intake and ex3 haust lines for obstructions or blockages.

2- Check the intake and exhaust lines for holes, sag3 ging or broken isolation hangers. If a sag is found in either line, raise the line and support it with an isola3 tion hanger. Replace any damaged isolation hang3 ers.

3- The return air duct connection should be sealed to the furnace casing and terminate outside the space containing the furnace.

4- Check the physical support of the furnace. It should be sound without sagging, cracks, gaps, etc., around the base so as to provide a seal between the support and the base.

5- Check that there is no obvious signs of deterioration of the furnace.

6- Inspect and clean condensate drain system for free flow of condensate.

IMPORTANT-If a change in the sound level of the unit is detected or there is evidence of condensate leak# age around the unit, contact your Lennox service technician.

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