Connecting To Gas Supply - Comfort Glow CGD3018P Owner's Operation And Installation Manual

VENT-FREE PROPANE/LP GAS LOG HEATER
INSTALLATION
Continued
CONNECTING TO GAS
SUPPLY
NOTICE: A qualified service per-
son must connect heater to gas
supply. Follow all local codes.
CAUTION: Never connect
heater directly to the propane
supply. This heater requires an
external regulator (not supplied).
Install the external regulator be-
tween the heater and propane
supply.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 27.
The installer must supply an external regu-
lator. 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 incom-
ing gas pressure, heater regulator damage
could occur. Install external regulator with
the vent pointing down as shown in Figure
15. Pointing the vent down protects it from
freezing rain or sleet.
Propane
Supply
Tank
Figure 15 - 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 1/2" diameter
or greater to allow proper gas
volume to heater. If pipe is too
small, undue loss of pressure will
occur.
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 16).
From
External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
Tee Joint
Pipe
Nipple
Cap
Sediment Trap
Figure 16 - Gas Connection
* Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer.
See Accessories, page 27.
** Minimum inlet pressure for purpose of input adjustment.
12
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.
External
CAUTION: Use pipe joint seal-
Regulator
ant that is resistant to liquid pe-
troleum (LP) gas.
Install sediment trap in supply line as shown
in Figure 16. Locate sediment trap where it
Vent is within reach for cleaning. Locate sedi-
Pointing
ment trap where trapped matter is not likely
Down
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.
CAUTION: Avoid damage to
regulator. Hold gas regulator with
wrench when connecting it to gas
piping and/or fittings.
A.G.A. Design-Certified
Manual Shutoff Valve
With 1/8" NPT Tap*
3" Minimum
Approved Flexible
Gas Hose (if allowed
by local codes)
Gas
Regulator
104341