Desa VS30PRA - Manual (Page 11)

11 104417
OWNER’S MANUAL
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)
INSTALLATION
Continued
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.
Continued
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Figure 12 - Attaching Base to Fireplace
Floor
Gas Control
Flexible Gas Hose
(if allowed by local
codes)
Masonry Screw
Masonry Screw
Propane Supply Tank
External
Regulator
Vent
Pointing
Down
Figure 13 - External Regulator With Vent
Pointing Down
Tee
Joint
Pipe
Nipple
Cap
3" Minimum
Sediment Trap
Gas
Control
From External
Regulator
(11" W.C.** to
14" W.C. Pressure)
A.G.A. Design-Certified Manual
Shutoff Valve With 1/8" NPT Tap*
* 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
Approved Flexible Gas Hose
(if allowed by 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 25.
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.
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).