Heat Controller A-13 Viii. Gas Supply, Condensate Drain And Piping, A. Gas Connection

VIII. GAS SUPPLY, CONDENSATE DRAIN AND PIPING

A. GAS CONNECTION

IMPORTANT: Connect this unit only to gas supplied by a commercial utility.

1.Install gas piping in accordance with local codes and regulations of the local utility company. In the absence of local codes, the installation must conform to the specifi- cations of the National Fuel Gas Code, ANSI Z223.1 - latest edition.

NOTE: The use of flexible gas connectors is not permitted. If local codes allow the use of a corrugated stainless steel flexible gas appliance connector, always use a new listed connector. Do not use a connector which has previously serviced another gas appliance.

NOTE: The Commonwealth of Massachusetts requires the gas shut-off valve to be a T-handle gas cock.

2.Connect the gas line to the gas pipe inlet opening provided into the 1/2″ inlet valve. See Figure 5 or 8 for typical piping.

3.Size the gas line to the furnace adequate enough to prevent undue pressure drop and never less than 1/2″ nominal pipe size.

4.Install a drip leg or sediment trap in the gas supply line as close to the unit as possi- ble.

5.Install an outside ground joint union to connect the gas supply to the control assem- bly at the burner tray.

6.Gas valves have been factory installed. Install a manual gas valve where local codes specify a shut-off valve outside the unit casing. (See Figure 13.)

7.Make sure piping is tight. A pipe compound resistant to the action of liquefied petroleum gases must be used at all threaded pipe connections.

8.IMPORTANT: any additions, changes or conversions required for the furnace to sat- isfactorily meet the application should be made by a qualified installer, service agency or the gas supplier, using factory-specified or approved parts. In the com- monwealth of Massachusetts, installation must be performed by a licensed plumber or gas fitter for appropriate fuel.

IMPORTANT: Disconnect the furnace and its individual shutoff valve from the gas sup- ply piping during any pressure testing of that system at test pressures in excess of 1/2 pound per square inch gauge or isolate the system from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of this gas sup- ply system at pressures equal to or less than 1/2 PSIG.

TO CHECK FOR GAS LEAKS, USE A SOAP AND WATER SOLUTION OR OTHER APPROVED METHOD. DO NOT USE AN OPEN FLAME.

!WARNING

CHECK FOR LEAKS. THE USE OF AN OPEN FLAME CAN RESULT IN FIRE, EXPLOSION, PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

IMPORTANT: Check the rating plate to make certain the appliance is equipped to burn the type of gas supplied. Care should be taken after installation of this equipment that the gas control valve not be subjected to high gas supply line pressure.

FIGURE 13

SUGGESTED GAS PIPING

ROOF OR GROUND LEVEL INSTALLATION

FROM GAS

METERUNIT GAS SUPPLY

CONNECTION *

MANUAL GAS

SHUT-OFF

VALVE

TABLE 1

NATURAL GAS PIPE CAPACITY TABLE (CU. FT./HR.)

Nominal		Equivalent Length of Pipe, Feet
Iron Pipe
Size,	10	20	30	40	50	60	70	80
Inches
1⁄2	132	92	73	63	56	50	46	43
3⁄4	278	190	152	130	115	105	96	90
1	520	350	285	245	215	195	180	170
11⁄4	1,050	730	590	500	440	400	370	350
11⁄2	1,600	1,100	890	760	670	610	560	530

*Factory supplied grommet must be utilized.

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