LG Electronics 395CAV Ðfilter Information, GAS Piping, Ð6Ð, Ðmaximum Capacity of Pipe

171⁄2-IN. WIDE CASINGS ONLY:

INSTALL FIELD-SUPPLIED FILTER FILLER STRIP UNDER FILTER.

3″

24 1/2″

1″

241⁄2-IN. WIDE CASINGS ONLY: CUT AND FOLD FACTORY-PROVIDED FILTERS AS SHOWN TO DESIRED SIZE.

5⁄16″

13⁄4″

5⁄16″

5⁄16″

1 3⁄4″

5⁄16″

1 3⁄4″ 1 3⁄4″

WASHABLE

FILTER

	FILTER	FILTER
		RETAINER
	SUPPORT
					A96030
Fig. 5ÐBottom Filter Arrangement
(Control Removed for Clarity)
TABLE 3ÐFILTER INFORMATION (IN.)
FURNACE	FILTER SIZE*				FILTER TYPE
CASING WIDTH	Side Return	Bottom Return
14-3/16	(1) 16 X 25 X 1²	(1) 14	X 25 X 1		Cleanable
17-1/2	(1) 16 X 25 X 1²	(1) 16	X 25	X 1	Cleanable
21	(1) 16 X 25 X 1	(1) 20	X 25	X 1²	Cleanable
24-1/2	(2) 16 X 25 X 1²	(1) 24	X 25	X 1	Cleanable

*Filters can be field modified by cutting the frame as marked and folding to the desired size. Alternate sizes can be ordered from your distributor or dealer. ² Factory-provided with the furnace.

4.Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement.

V.GAS PIPING

Gas piping must be installed in accordance with national and local codes. Refer to the current edition of the NFGC. Canadian installations must be installed in accordance with NSCNGPIC and all authorities having jurisdiction.

Refer to Table 4 for the recommended gas pipe size. Risers must be used to connect to the furnace and the meter.

Ð6Ð

						A89014
Fig. 6ÐLeveling Leg Installation
TABLE 4ÐMAXIMUM CAPACITY OF PIPE*
NOMINAL IRON	INTERNAL	LENGTH OF PIPE (FT)
PIPE SIZE	DIAMETER
		10	20	30	40		50
(IN.)	(IN.)
1/2	0.622	175	120	97	82		73
3/4	0.824	360	250	200	170		151
1	1.049	680	465	375	320		285
1-1/4	1.380	1400	950	770	660		580
1-1/2	1.610	2100	1460	1180	990		900

*Cubic ft of gas per hr for gas pressures of 0.5 psig (14-in. wc) or less, and a pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table 10-2 NFPA 54-1992.

CAUTION: If a flexible connector is required or al- lowed by the authority having jurisdiction, black iron pipe shall be installed at the gas valve and extend a minimum of 2 in. outside the furnace casing.

→Piping should be pressure tested in accordance with local and national plumbing and gas codes before the furnace has been attached. If the pressure exceeds 0.5 psig (14-in. wc), the gas supply pipe must be disconnected from the furnace and capped before the pressure test. If the test pressure is equal to or less than 0.5 psig (14-in. wc), turn off electric shutoff switch located on the gas valve before the test. It is recommended that the ground joint union be loosened before pressure testing. After all connections have been made, purge the lines and check for leakage with regulated gas supply pressure.

Install a sediment trap in the riser leading to the furnace. The trap can be installed by connecting a tee to the riser leading from the furnace. Connect a capped nipple into the lower end of the tee. The capped nipple should extend below the level of the gas controls. (See Fig. 7.)

Apply joint compound (pipe dope) sparingly and only to the male threads of each joint. The compound must be resistant to the action of propane gas.

→An accessible manual shutoff valve MUST be installed upstream of the furnace gas controls and within 72 in. of the furnace. A 1/8-in. NPT plugged tapping, accessible for test gage connection, MUST be installed immediately upstream of the gas supply connection to the furnace and downstream of the manual shutoff valve. Place ground joint union between the gas control manifold and the manual shutoff valve.