LG Electronics 395CAV Ð5Ð, III. Filter Arrangement, IV. Leveling Legs if Required

For Example:

395CAV FURNACE	FREE AREA PER OPENING	ROUND PIPE
INPUT BTUH	(SQ IN.)	(IN. DIA)
44,000	11.0	4
66,000	16.5	5
88,000	22.0	6
110,000	27.5	6
132,000	33.0	7
154,000	38.5	7

For Example:

395CAV FURNACE	FREE AREA PER OPENING	ROUND PIPE
INPUT BTUH	(SQ IN.)	(IN. DIA)
44,000	22.0	6
66,000	33.0	7
88,000	44.0	8
110,000	55.0	9
132,000	66.0	10
154,000	77.0	10

c.When ducts are used, they must be of the same cross- sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular ducts must not be less than 3 in. (See Fig. 3.)

				1 SQ IN.
	DUCTS			PER 4000
				BTUH*
	TO
	OUTDOORS
12″ MAX		D		12″
1 SQ IN.		VENT		MAX
	A
PER 2000		THROUGH		F
BTUH*	SUPPLY	ROOF		1 SQ IN.
	AIR
				PER
				4000
				BTUH*
DUCTS		CONFINED	SPACE	OUTDOORS
TO
OUTDOORS
				1 SQ IN.
				PER
				4000
1 SQ IN.				BTUH*
	B		E	G
PER 2000
BTUH*				12″
″		C		MAX
12 MAX
			12″ MAX
RETURN AIR		DUCT		1 SQ IN.
		TO		PER 4000
		OUTDOORS		BTUH*

*Minimum dimensions of 3-In.

NOTE: Use any of the following combinations of openings:

A & B C & D D & E F & G

A89013

Fig. 3ÐAir For Combustion and Ventilation

(Outside Air)

Ð5Ð

WARNING: Do not install the furnace on its back; safety control operation will be adversely affected. Never connect return-air ducts to the back of the furnace. A failure to follow this warning can cause a fire, personal injury, or death.

III.FILTER ARRANGEMENT

The factory-supplied filter(s) is shipped in the blower compart- ment. Determine location for the filter and relocate filter retaining wire if necessary. See Fig. 4 for side return application and Fig. 5 for bottom return application. See Table 3 to determine correct filter size for desired filter location. Table 3 indicates filter size, location, and quantity shipped with the furnace.

WASHABLE

FILTER

FILTER

RETAINER

A93045

Fig. 4ÐSide Filter Arrangement (Control Removed for Clarity)

For bottom air-return applications, filter may need to be cut to fit some furnace casing widths. A bottom closure panel is factory installed in the bottom of the furnace. When bottom return inlet is desired, remove and discard the bottom closure panel. Remove side clip(s) and install in hole. Two sets of hardware are needed for furnaces in 24-1/2-in. wide casings using 2 filters for bottom return. All hardware is provided for filter installation.

NOTE: Furnaces with a 17-1/2-in. wide casing require an addi- tional procedure when locating the filter for bottom return-air application. Field fabricate a sheet metal filler strip 1 X 3 X 24-1/2 in. and install it along side of the filter as shown in Fig. 5. Drive 2 screws through the casing side and into the filler strip to secure it in place. Filter should rest on the top of the filler strip when installed.

WARNING: Never operate unit without a filter or with filter access door removed. Failure to follow this warning can cause fire, personal injury, or death.

IV. LEVELING LEGS (IF REQUIRED)

When the furnace is used with side inlet(s) and leveling legs are required, refer to Fig. 6, and install field-supplied, corrosion- resistant 5/16-in. machine bolts and nuts.

NOTE: The maximum length of the bolt should not exceed 1-1/2 in.

1.Lay furnace on its back. Locate and drill 5/16-in. diameter hole in each bottom corner of furnace as shown in Fig. 6.

2.Install nut on bolt and install bolt and nut in hole. (Install flat washer if desired.)

3.Install another nut on other side of furnace base. (Install flat washer if desired.)