Connecting To Gas Supply - Comfort Glow CGP20T Owner's Operation And Installation Manual

CONNECTING
TO GAS
SUPPLY
14
A qualified service person must connect heater to gas supply.
Follow all local codes.
Never connect heater directly to the propane/LP supply. This heater
requires an external regulator (not supplied). Install the external
regulator between the heater and propane/LP supply.
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, heater regulator damage
could occur. Install external regulator with the vent pointing down as shown in Figure
13. Pointing the vent down protects it from freezing rain or sleet.
Propane/LP
Supply Tank
Figure 13 - External Regulator With Vent Pointing Down
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 large enough diameter to allow proper gas volume to heater.
If pipe is too small, undue loss of pressure will occur.
20,000 Btu/Hr Models
30,000 Btu/Hr Model
Installation must include a manual shutoff valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream from
heater (see Figure 14, page 15).
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.
Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown in Figure 14, page 15. Locate sediment
trap where it is within reach for cleaning. Locate sediment trap where trapped
matter is not likely to freeze. A sediment trap traps moisture and contaminants. This
keeps them from going into heater controls. If sediment trap is not installed or is
installed wrong, heater may not run properly.
NOTICE
CAUTION
WARNING ICON G 001
CAUTION
WARNING ICON G 001
Typical Inlet Pipe Diameters
3/8" or greater
1/2" or greater
CAUTION
WARNING ICON G 001
External
Regulator
Vent Pointing
Down
103875