Empire Comfort Systems DVX42DP91(N,P)-1 GAS Supply, Installing a New Main Gas Cock

GAS SUPPLY

The gas pipeline can be brought in through the right or left side of the appliance. Consult the current National Fuel Gas Code, ANSI Z223.1 CAN/CGA-B149 (.1 or .2) installation code.

Recommended Gas Pipe Diameter

Pipe Length	Schedule 40 Pipe		Tubing, Type L
	Inside Diameter		Outside Diameter
	Nat.	L.P.	Nat.	L.P.
0-10ft	1/2"	3/8"	1/2"	3/8"
0-3m	12.7 mm	9.5 mm	12.7 mm	9.5 mm
11-40ft	1/2"	1/2"	5/8"	1/2"
4-12m	12.7 mm	12.7 mm	15.9 mm	12.7 mm
41-100ft	1/2"	1/2"	3/4"	1/2"
13-30m	12.7 mm	12.7 mm	19 mm	12.7 mm
101-150ft	3/4"	1/2"	7/8"	3/4"
31-46m	19 mm	12.7 mm	22.2 mm	1.9 mm

Note: Never use plastic pipe. Check to confirm whether your local codes allow copper tubing or galvanized.

Note: Since some municipalities have additional local codes, it is always best to consult your local authority and installation code.

The use of the following gas connectors is recommended:

—ANS Z21.24Appliance Connectors of Corrugated MetalTubing and Fittings.

—ANS Z21.45 Assembled Flexible Appliance Connectors of

Other Than All-Metal Construction

The above connectors may be used if acceptable by the authority having jurisdiction.The state of Massachusetts requires that a flexible appliance connector cannot exceed three feet in length.

Figure 6

	Gas Supply Pressure (inches w.c.)
	Minimum	Normal	Maximum
Natural Gas	4.5"	7.0"	*14.0"
LP (Propane)	10.8"	11.0"	14.0"
	Manifold Pressure (inches w.c.)
		Normal (HI)
Natural Gas		3.5"
LP (Propane)		10.0"

*NOTE: Remote "RF" Models - 10.5" w.c. maximum

Installing a New Main Gas Cock

Each appliance should have its own manual gas cock.

A manual main gas cock should be located in the vicinity of the unit. Where none exists, or where its size or location is not ad- equate, contact your local authorized installer for installation or relocation.

Compounds used on threaded joints of gas piping shall be resistant to the action of liquefied petroleum gases. The gas lines must be checked for leaks by the installer. This should be done with a soap solution watching for bubbles on all exposed connections, and if unexposed, a pressure test should be made.

Never use an exposed flame to check for leaks. Appliance must be disconnected from piping at inlet of control valve and pipe capped or plugged for pressure test. Never pressure test with appliance connected; control valve will sustain damage!

NOTE: The millivolt gas controls are equipped with a captured screw type pressure test point, therefore it is not necessary to provide a 1/8" test point up stream of the control.

When using copper or flex connector use only approved fittings.

The appliance and it’s individual shut off valve must be disconnected from supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5kPa).

The appliance must be isolated from the gas supply piping system by closing its individual manual shut off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5kPa).

Attention! If one of the procedures results in pressures in excess of 1/2 psig (14" w.c.) (3.5 kPa) on the fireplace gas valve, it will result in a hazardous condition.

Checking Manifold Pressures

Both Propane and Natural gas valves have a built-in pressure regulator in the gas valve. Natural gas models will have a manifold pressure of approximately 3.5" w.c. (.871kPa) at the valve outlet with the inlet pressure to the valve from a minimum of 4.5" w.c. (1.120kPa) for the purpose of input adjustment to a maximum of 14.0" w.c. (3.484kPa). Propane gas models will have a manifold pressure approximately 10.0" w.c. (2.49kPa) at the valve outlet with the inlet pressure to the valve from a minimum of 10.8" w.c. (2.68kPa) for the purpose of input adjustment to a maximum of 14.0" w.c. (3.484kPa).

Figure 7

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