Connecting To Gas Supply - Desa Comfort Glow CGR30PT Owner's Operation And Installation Manual

CONNECTING
TO GAS
SUPPLY
NOTICE
A qualified service person must connect heater to gas supply.
Follow all local codes.
CAUTION
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 supply.
Propane/LP
Supply Tank
Extemal Regulator
The installer must supply an external regulator. The external regulator will reduce
incoming gas pressure. You must i'educe 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 7. Pointing the vent down protects it from freezing rain or sleet.
Vent-Pointing
Down
Figure 7 - External Regulator With Vent Pointing Down
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 large enough diameter to allow proper gas volume to heater.
If pipe is too small, undue loss of pressure will occur.
Typical Pipe Diameters
CGRIgPT: 3/8" or greater
CGR30PT: I/'2" or greater
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 Gas Connection, page 14).
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.
CAUTION
Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown in Gas Conneclinn, page 14. l.,oc.ate
ediment trap where it is within reach for cle_tning. Locate sediment trap where
trapped matier 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 instal.led wrong, heater may not run propedy.
lit