Installing Gas Piping To Fireplace Location - Comfort Glow CDV37N/PA Owner's Operation And Installation Manual

DIRECT-VENT FIREPLACE (NATURAL/PROPANE)
FIREPLACE
INSTALLATION
Continued
INSTALLING GAS PIPING TO
FIREPLACE LOCATION
NOTICE: A qualified service per-
son must connect fireplace to
gas supply. Follow all local codes.
CAUTION: For propane units,
never connect heater directly to
the propane supply. This heater
requires an external regulator (not
supplied). Install the external
regulator between the heater and
propane supply.
Installation Items Needed
Before installing fireplace, make sure you
have the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to LP/propane gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
• approved flexible gas line with gas con-
nector (if allowed by local codes) (not
provided)
* 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 A.G.A. design-certified manual
shutoff valve from your retailer.
For propane connections only, the installer
must supply an external regulator. The ex-
ternal 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 34.
Pointing the vent down protects it from
freezing rain or sleet.
CDV37N/P(A,B) AND CDV41N/P(A,B)
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-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 fireplace. 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
fireplace (see Figure 35).
External
Regulator
Vent
Pointing
Down
Figure 34 - External Regulator with Vent
Pointing Down (Propane Only)
A.G.A. Design-Certified
Manual Shutoff Valve with
1/8" NPT Tap*
Approved Flexible
Gas Line
3" Minimum
Figure 35 - Gas Connection
* The A.G.A. design-certified manual shutoff valve may be supplied with the appliance
or you can purchase it from your retailer.
18
Check your building codes for any special
requirements for locating manual shutoff
valve to fireplaces.
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 fireplace valves.
CAUTION: Use pipe joint seal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Install sediment trap/drip leg in supply line
as shown in Figure 35. Locate sediment
trap/drip leg where it is within reach for
Propane
Supply cleaning. Locate sediment trap/drip leg
Tank
where trapped matter is not likely to freeze.
A sediment trap traps moisture and con-
taminants. This keeps them from going into
fireplace gas controls. If sediment trap/drip
leg is not installed or is installed wrong,
fireplace may not run properly.
Natural - From Gas
Meter (5" W.C. to 10.5"
W.C. Pressure )
LP - From External
Regulator (11" W.C. to
14" W.C. Pressure)
Cap Pipe Nipple Tee Joint
Sediment Trap/Drip Leg
105541