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8. CONNECTING TO GAS SUPPLY
WARNING: A qualified service technician must connect heater to gas supply. Follow all local codes.
WARNING: This appliance requires a 3/8-inch NPT (National Pipe Thread) inlet connection to the
pressure regulator.
WARNING: Never connect heater to private (non-utility) gas wells. This gas is commonly known as
wellhead gas.
WARNING: Do not over-tighten gas connections.
CAUTION: Use only new, black iron or steel pipe. Internally tinned copper tubing may be used in
certain areas. Check your local codes. Use pipe of 1/2-in. diameter or greater to allow proper gas
volume to heater. If pipe is too small, undue loss of pressure will occur.
NATURAL GAS MODELS:
CAUTION: Check your gas line pressure before connecting heater to gas line. Gas line pressure
must be no greater than 11 inches of water. If gas line pressure is higher, damage on appliance
regulator could occur.
PROPANE MODELS:
CAUTION: Never connect heater directly to the gas supply. This heater requires an external
regulator (not supplied). Install the external regulator between the heater and gas supply.
CAUTION: Avoid damage to regulator. Hold gas regulator with wrench when connecting into gas
piping and/or fittings.
CAUTION: Use pipe joint sealant that is resistant to gas (Propane or Natural Gas).
IMPORTANT: Install an equipment shutoff valve in an accessible location where the gas pipe goes
indoors. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male threads. This will prevent
excess sealant from going into pipe. Excess sealant in pipe could
result in clogged heater valves. The installer must supply an
external regulator. The external regulator will reduce incoming gas
pressure. You must reduce incoming gas pressure to between 11
and 14 inches of water. If you do not reduce incoming gas
pressure, appliance regulator damage could occur. Install external
regulator with the vent pointing down as shown in Figure 8.
Pointing the vent down protects it from freezing rain or sleet.
Figure 8 - External Regulator with Vent Pointing Down
External regulator
Propane/LP supply tank
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