Bradford-White Corp IGE-199R, IGE-199C GAS Meter Size -NATURALGAS only, GAS Pressure Regulation

GAS METER SIZE –NATURALGAS ONLY

Be sure that the gas meter has sufficient capacity to supply the full rated gas input of the water heater as well as the requirements of all other gas fired equipment supplied by the meter. If the gas meter is too small, ask the gas company to install a larger meter having adequate capacity.

GAS PRESSURE REGULATION

Minimum and maximum gas supply pressures are listed below: The minimum gas pressure specified below is required for the full input rating specified on the water heater rating plate.

Natural Gas: Minimum: 6.0” w.c.	L.P. Gas:	Minimum: 10.0” w.c.
Maximum: 10.5” w.c.		Maximum: 13.5” w.c.

BEFORE PLACING THE WATER HEATER IN OPERATION, CHECK FOR GAS LEAKAGE. USE SOAP AND WATER SOLUTION OR OTHER MATERIAL ACCEPTABLE FOR THE PURPOSE OF LOCATING GAS LEAKS.

WARNING

DO NOT use matches, candles, flame or other sources of ignition for this purpose.

Capacity Table for Natural Gas in Cubic Feet/Hour

(Table assumes 0.3 inch pressure drop, specific gravity of 0.60 for gas pressures of 0.5 psi or less)

Pipe					Length of Pipe in Feet (Meters)
Size in	10	20	30	40	50	60	70	80	90	100	125	150	175	200
Inches	(3)	(6)	(9)	(12)	(15)	(18)	(21)	(24)	(27)	(30)	(38)	(45)	(53)	(61)
¾”	278	190	152	130	115	105	96	90	84	79	72	64	59	55
1”	520	350	285	245	215	195	180	170	160	150	130	120	110	100
1 ¼”	1050	730	590	500	440	400	370	350	320	305	275	250	225	210
1 ½”	1600	1100	890	760	670	610	560	530	490	460	410	380	350	320

Note: After determining the length of pipe required, select the pipe size that will supply the cubic feet per hour of gas required for the input rating of the gas appliances on the line.

The formula for figuring the cubic feet per hour required is:

CFH = Gas Input of Appliance on the Line (Btu/hr)

Heating Value of Gas (Btu/Cu. Ft.)

The heating value may be obtained from the local natural gas utility

Capacity Table for LP Gas in MBH of undiluted liquefied petroleum gases

(Table assumes 11 inches of water column pressure at the inlet, 0.5” press. drop)

	Pipe				Length of Pipe in Feet (Meters)
Size in		10	20	30	40	50	60	70	80	90	100	125	150
Inches		(3)	(6)	(9)	(12)	(15)	(18)	(21)	(24)	(27)	(30)	(38)	(45)
½”		275	189	152	129
¾”		567	393	315	267	237	217	196	185	173	162	146
1	“	1071	732	590	504	448	409	378	346	322	307	275	252
1	1/4”	2205	1496	1212	1039	913	834	771	724	677	630	567	511

INITIAL OPERATION AND TESTING (INSTALLER ONLY)

1.Open the gas and water supply valves to the water heater.

2.Check for water and gas leaks. Use soap solution to check for gas leaks.

3.To check inlet supply pressure, remove the 1/8” NPT plug on the gas inlet supply fitting just below the bottom casing and install a barb fitting for attaching a hose to a manometer. For checking the gas manifold pressure, the plug is located just below the gas manifold connection inside the control panel.

4.Turn power on (after completing electrical connections – refer to Section VII, “Electrical Connections”) and fully open a hot water tap.

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