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DESA INTERNATIONAL
VENT-FREE NATURAL GAS STOVE HEATER
INSTALLATION
Continued
CONNECTING TO GAS
SUPPLY
WARNING: This appliance re-
quires a 1/2" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.
WARNING: A qualified service
person must connect heater to
gas supply. Follow all local codes.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• piping (check local codes)
• sealant (resistant to LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional CSA design-certified
equipment shutoff valve from your dealer.
See Accessories, page 33.
Back View
Back Stove
Panel
Product
Identification
Label
Side View
Front of
Gas Inlet
Stove
Connection
Unit
Access
Figure 19 - Gas Regulator Location and
Gas Line Access Into Stove Cabinet
The gas inlet connection for the stove heater
is located on the lower right-hand side of the
stove when viewed from the front of the
unit. The gas connection can be made either
through the bottom right side or through the
lower back opening as illustrated in Figure
19. Make sure gas log heater is secured to
the stove cavity assembly.
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
volume will occur.
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Gas Control
Figure 20 - Gas Connection (SVYD18NR and FSVYD18NR Series)
From Gas Meter
(5" W.C.** to 10.5"
W.C. Pressure)
Tee Joint
Gas
Sediment
Log
Pipe
Trap
Heater
Nipple
Cap
Figure 21 - Gas Connection (SVYD18N and FSVYD18N Series)
* Purchase the optional CSA design-certified equipment shutoff valve from your dealer.
See Accessories, page 33.
** Minimum inlet pressure for purpose of input adjustment.
Installation must include a equipment 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 20, SVYD18NR and
FSVYD18NR series, or Figure 21,
SVYD18N and FSVYD18 series).
IMPORTANT: Install equipment shutoff
valve in an accessible location. The equip-
ment shutoff valve is for turning on or
shutting off the gas to the appliances.
Check your building codes for any special
requirements for locating equipment shutoff
valve to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged heater valves.
3" Minimum
Approved Flexible Gas Hose
(if allowed by local codes)
3" Minimum
12
CAUTION: Use pipe joint seal-
ant that is resistant to liquid pe-
troleum (LP) gas.
From Gas Meter
(5" W.C.** to 10.5"
W.C. Pressure)
Tee Joint
Pipe Nipple
Cap
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible Gas Hose
(if allowed by local codes)
Sediment
Trap
Gas
Regulator
104461
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