Lennox International Inc G50UH-24A-045 Leak Check, Electrostatic Discharge Esd, Figure Figure

	Left Side Piping			AUTOMATIC		MANUAL
	(Standard)
				GAS	VALVE
MANUAL		AUTOMATIC		(with	manual	VALVE
MAIN	SHUT-OFF	GAS	VALVE	shut-off valve)		(With 1/8	in. NPT
VALVE		(with	manual
(With	1/8 in. NPT	shut-off valve /				Shown)
Plugged	Tap Shown)
						JOINT
						UNION
	GROUND
	JOINT
	UNION					DRIP	LEG
				FIELD		Right Side	Piping
						(Alternate)
			PROVIDED
	DRIP LEG		AND	INSTALLED

FIGURE 19

Leak Check

After gas piping is completed, carefully check all piping connections (factory- and field-installed) for gas leaks, Use a leak detecting solution or other preferred means.

NOTE - If emergency shutoff is necessa04 shut off the main manual gas valve and disconnect the main power to the furnace. The installer should properly label these devices.

&CAUTION

The furnace must be isolated from the gas supply system by closing its individual manual shut-off valve during any pressure testing of the gas supply system at pressures less than or equal to 1/2 psig (3.48 kPa, 14 inches w.c.).

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

&CAUTION

The unit is equipped with a field make-up box, The make- up box may be moved to the right side of the furnace to fa- cilitate installation, If the make-up box is moved to the right side, the excess wire must be pulled into the blower compartment. Secure the excess wire to the existing harn- ess to protect it from damage.

&IMPORTANT	INTERIOR MAKE-UP BOX INSTALLATION
	MAKE-UP
	BOX

MANUAL	MAIN		ISOLATE	Right Side
SHUT-OFF	VALVE		GAS VALVE \
WILLNOTHOLD		._.		FURNACE
NORMALTEST			_i _
PRESSURE			_1]!

CAP /

FIGURE 20

FIGURE 21

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