Connecting To Gas Supply - Desa CFS18PRA Owner's Operation And Installation Manual

Desa owner's operation and installation manual unvented (vent-free) propane/lp gas log heater cfs18pra, vs18pra, vs24pra, vs30pra
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INSTALLATION
Continued
Flexible Gas Hose
(if allowed by local
codes)
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Masonry Screw
Figure 12 - Attaching Base to Fireplace
Floor
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,
see Figure 13)
• piping (check local codes)
104417
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
Gas Control
• 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 25.
Propane Supply Tank
Masonry Screw
Figure 13 - External Regulator With Vent
Pointing Down
Approved Flexible Gas Hose
(if allowed by local codes)
Gas
Control
* Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer. See
Accessories, page 25.
** Minimum inlet pressure for purpose of input adjustment.
Figure 14 - Gas Connection
OWNER'S MANUAL
External
Regulator
Vent
Pointing
Down
A.G.A. Design-Certified Manual
Shutoff Valve With 1/8" NPT Tap*
11
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
13. Pointing the vent down protects it from
freezing rain or sleet.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
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 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 14).
From External
Regulator
(11" W.C.** to
14" W.C. Pressure)
3" Minimum
Tee
Joint
Pipe
Nipple
Cap
Sediment Trap
Continued

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This manual is also suitable for:

Vs18praVs30praVs24pra

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