Raypak 1334001 operating instructions Gas Pressure Regulator, Venting of Diaphragm Gas Components

MAXIMUM EQUIVALENT PIPE LENGTH

NATURAL GAS 1000 BTU/Cubic Foot	.60 SPECIFIC GRAVITY @ 0.5" W.C. PRESSURE DROP
PROPANE GAS 2500 BTU/Cubic Foot	1.53 SPECIFIC GRAVITY @ 0.6" W.C. PRESSURE DROP

1/2"

N P

3/4"

1"

1-1/4"

1-1/2"

2"

2-1/2"

3"

4"

N

P

N

P

N

P

N

P

N

P

N

P

N

P

N

P

0133	15	35	60	145	200	500
*0182/0181	-	15	30	65	95	250	400	-	-	-	-	-	-	-	-	-	-	-
*0260/0261	-	10	20	40	60	140	250	560		-	-	-	-	-	-	-	-	-
*0330/0331		-	15	25	35	85	150	380	360	-	-	-	-	-	-	-	-	-
*0400/0401		-	-	15	25	60	100	260	250	-	-	-	-	-	-	-	-	-
0514			-	10	15	35	65	150	130	360	500	-	-	-	-	-	-	-
0624			-	-	10	25	45	100	95	250	340	-	-	-	-	-	-	-
0724			-	-	-	20	35	80	75	180	260	600	-	-	-	-	-	-
0824			-	-	-	15	25	60	55	130	185	480	500	-	-	-	-	-
0926/0962			-	-	-	15	20	45	45	110	150	360	400	-	-	-	-	-
1083/1125			-	-	-	10	15	35	35	80	120	300	300	-	-	-	-	-
1178/1223			-	-	-	-	-	25	25	60	85	220	200	-	-	-	-	-
1287/1336			-	-	-	-	-	25	20	55	75	180	170	325	560	-	-	-
1414/1468			-	-	-	-	-	20	15	45	65	150	165	300	500	-	-	-
1571/1631			-	-	-	-	-	15	15	35	50	120	125	250	400	-	-	-
1758/1826			-	-	-	-	-	15	10	30	40	100	100	225	340	-	-	-
2100			-	-	-	-	-	10	10	25	30	80	75	175	260	-	-	-
2500			-	-	-	-	-	-	-	15	20	55	55	135	160	400	600	-
3001			-	-	-	-	-	-	-	10	15	35	40	85	120	250	500	-
3500			-	-	-	-	-	-	-	-	10	30	30	45	80	200	400	600
4001			-	-	-	-	-	-	-	-	5	20	25	35	65	160	300	400

* Models 0181, 0261, 0331, and 0401 are Low NOx units and are not available in propane.

A minimum of 7" WC and a maximum of 10.5" WC upstream pressure under load, and no load conditions must be provided for natural gas or a minimum of 11" WC and a maximum of 13" for propane.

Pressure drops from the no load condition to the full load condition must be no more than 30% for proper operation.

Table G: Maximum Equivalent Pipe Lengths

Gas Pressure Regulator

The gas pressure regulator located in the gas valve is preset nominally at 4" WC for natural gas, and 11" WC for propane. Between the gas valve and the burners is a 1/8" pipe plug. The pressure at this point, taken with a manometer, should be about 3.7" WC natural gas and 10.5" WC propane. Models 0181, 0261, 0331, and 0401 should be 3.9 WC natural gas. If an adjustment is needed, turn adjustment screw clockwise to increase pressure, or counter-clockwise to decrease pressure.

Venting of Diaphragm Gas

Components

Fig. 20: Bleed Line Connection

Gas train components that have diaphragms in their construction are supplied with a bleed line connection that must be connected to the outside atmosphere as required by the National Fuel Gas Code. Under NO circumstances shall bleed lines terminate in the gas utilization equipment flue or exhaust system.

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