Raypak P-926, P-1826, P-2100, P-4001 Pipe Sizing for GAS Connections, Waterconnections, Location

GAS PRESSURE REGULATOR

The gas pressure regulator is preset and sealed at 4 in. WC for natural gas, and 11 in. WC for propane gas. 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 in. WC natural gas and 10.5 in. WC propane gas. If an adjustment is needed, remove seal

and turn adjustment screw clockwise		, to
increase pressure or counterclocwise		, to
decrease pressure.
GAS PRESSURE	MANOMETER
TEST UPSTREAM

MANUAL

SHUT-OFF

VALVE

GAS PRESSURE TEST

AT GAS VALVE

GAS PRESSURE TEST

AT HEATER

Fig. #8149.0

PIPE SIZING FOR GAS CONNECTIONS

VENTING OF DIAPHRAGM GAS COMPONENTS Heaters have gas train components that have dia-

phragms 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.

Bleed
Line Connection	Fig. # 8185.2

WATERCONNECTIONS

LOCATION

The heater requires water flow and positive pressure to fire and operate properly. It must therefore be installed downstream of the discharge side of the filter pump. A typical installation is plumbed as follows:

1.The inlet side of the filter is plumbed directly to the discharge side of the filter pump;

2.The outlet side of the filter is then plumbed to the inlet of the heater; and

3.The outlet of the heater is plumbed to the return line to the pool or spa. The pump, filter and heater are thus plumbed in series.

Heater must be located so that any water leaks will not damage the structure of adjacent area. High tempera- ture plastic pipe (CPVC) may be connected directly into the heater Models 926-1223, if local codes permit and if controls operate the pump for at least fifteen minutes after the heater is turned off.

CAUTION (Models 926-1223):NEVER install PVC directly into heater. Four feet of copper or high tempera- ture pipe and two elbows are required between the heater and the PVC connections.

Fig. # 8129.0

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