16
INSTALLATION
CONNECTING TO GAS SUPPLY
WARNING
: A qualified service technician must connect the heater to the gas supply. Follow all
local codes.
IMPORTANT:
This appliance requires a 3/8-inch NPT (National Pipe Thread) inlet connection
to the pressure regulator. Never connect the heater to private (non-utility) gas wells, commonly
known as wellhead gas.
WARNING
: Do not overtighten 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.
CAUTION:
Check your gas line pressure before connecting the heater to a gas line. Gas line
pressure must be a minimum 6” WC for NG & 11” WC for LP with a max pressure of 9” WC for
NG & 14” WC for LP. If gas line pressure is higher, the unit will not work and heater regulator
damage could occur.
CAUTION:
Never connect the heater directly to a LP 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 the gas regulator with a wrench when connecting
into gas piping and/or fittings.
CAUTION:
Use pipe joint sealant that is resistant to gas (Propane or Natural Gas).
Typical Inlet Pipe Diameters
Use 3/8-inch black iron pipe or greater. Installation must include an equipment shutoff valve,
union, and plugged 1/8-inch NPT tap. Locate NPT tap within reach for test gauge hook up. NPT
tap must be upstream from the heater
(see Fig. 12)
.
IMPORTANT
: Install an equipment shutoff valve in an accessible location. 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.
