17
CONNECTING TO GAS SUPPLY
WARNING:
A qualified service technician must connect heater
to gas supply. Follow the heater specification and all local
codes. Wrong gas supply may result improper operation, or damage
on your heater, property or/and personal body.
WARNING:
This appliance requires a 5/8-inch UNF (Unified
National Fine) 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 8 inches of water column. 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 with nominal
outlet pressure of 11” water column and sufficient flow rates. Install external regulator with the vent
pointing down as shown in Figure 11. Pointing the vent down protects it from freezing rain or sleet. If
flexible gas hose is applied, it should meet the requirements of ANSI/UL569 Standard for Pigtail and
Flexible Hose Connection for LP-Gas. Improper regulator and/or gas hose assembly may occur damage
on your heater, property or/and personal body.
Propane/LP
supply tank
External regulator
Figure 11 - External Regulator with Vent Pointing Down
