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 |
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increase pressure or counterclocwise |
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decrease pressure. |
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GAS PRESSURE | MANOMETER |
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TEST UPSTREAM |
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MANUAL
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 |
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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
CAUTION (Models
Fig. # 8129.0
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