Goodman Mfg MH95/ACSH96/AMEH96/ GCH95/GME95/GCH9 Horizontal Upflow Model, Horizontal Counterflow

	MANUAL SHUT-OFF VALVE
	(UPSTREAM FROM GROUND
	JOINT PIPE UNION)
GROUND	ALTERNATE
	UNION
JOINT
	LOCATION
PIPE
	DRIP LEG
UNION
GAS VALVE	GROMMET IN STANDARD
	GAS LINE HOLE

BURNERS

DRAIN TRAP

	GROMMET IN ALTERNATE
MANIFOLD
	GAS LINE HOLE
ALTERNATE GAS
LINE LOCATION

HORIZONTAL [UPFLOW MODEL]

	ALTERNATE
GROUND	UNION
	LOCATION
JOINT
PIPE
UNION
GAS VALVE

BURNERS

DRAIN TRAP

MANIFOLD	GORMMET IN ALTERNATE
ALTERNATE GAS	GAS LINE HOLE
LINE LOCATION

HORIZONTAL [COUNTERFLOW]

Gas Piping Connections

WARNING

EDGES OF SHEET METAL HOLES MAY BE SHARP. USE GLOVES AS A PRECAUTION WHEN REMOVING HOLE PLUGS.

DIRECT/STANDARD INLET PIPING

When gas piping enters directly to the gas valve through the standard inlet hole, the installer must supply straight pipe with a ground joint union to reach the exterior of the furnace. The rigid pipe must be long enough to reach the outside of the cabinet to seal the grommet cabi- net penetration. A semi-rigid connector to the gas piping can be used outside the cabinet per local codes.

INDIRECT/ALTERNATE INLET PIPING

When gas piping enters indirectly to the gas valve through the alternate gas inlet hole, the following 1/2 inch pipe fittings (starting from the gas valve) to reach the outside of the cabinet must be supplied:

•(1) Close nipple

•(1) 90 degree street elbow

•(1) 2 1/2” pipe nipple

•(1) 90 degree elbow

•Straight Pipe

•The straight pipe must be long enough to reach the outside of the cabinet so as to seal the grommet cabinet penetration and to install the ground joint union outside the cabinet. A semi-rigid connector to the gas piping can be used outside the cabinet per local codes.

GAS PIPING CHECKS

Before placing unit in operation, leak test the unit and gas connec- tions.

WARNING

TO AVOID THE POSSIBILITY OF EXPLOSION OR FIRE, NEVER USE A MATCH OR OPEN FLAME TO TEST FOR LEAKS.

Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other approved testing methods.

NOTE: Never exceed specified pressures for testing. Higher pressure may damage the gas valve and cause subsequent overfiring, resulting in heat exchanger failure.

Disconnect this unit and shutoff valve from the gas supply piping system before pressure testing the supply piping system with pres- sures in excess of 1/2 psig (3.48 kPa).

Isolate this unit from the gas supply piping system by closing its external manual gas shutoff valve before pressure testing supply piping system with test pressures equal to or less than 1/2 psig (3.48 kPa).

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