Desa SVYD18N - Manual (Page 11)

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INSTALLATION
Continued
CONNECTING TO GAS SUPPLY
WARNING: A qualified service person must con-
nect heater to gas supply. Follow all local codes.
Installation Items Needed
Before installing heater, make sure you have the items listed below.
• external regulator - propane/LP only (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/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. Purchase
the optional CSA design-certified equipment shutoff valve from
your dealer. See Accessories, page 35.
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.
For propane/LP units, installer must supply an external regulator.
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 incoming gas pressure, heater regulator damage
could occur. Install external regulator with the vent pointing down
as shown in Figure 20. Pointing the vent down protects it from
freezing rain or sleet.
CAUTION: Never connect propane/LP heater di-
rectly to the propane/LP supply. This heater requires
an external regulator (not supplied). Install the external
regulator between the heater and propane/LP supply.
WARNING: This appliance requires a 1/2" NPT
(National Pipe Thread) inlet connection to the pres-
sure regulator.
WARNING: Never connect natural gas heater to
private (non-utility) gas wells. This gas is commonly
known as wellhead gas.
Figure 19 - Gas Regulator Location and Gas Line Access Into
Stove Cabinet
Gas Inlet
Connection
Access
Product
Identification
Label
Gas Log Heater
Back View Side View
Figure 20 - External Regulator With Vent Pointing Down
Back
Stove
Panel
Stove
Unit
Front
Propane/LP
Supply Tank
External
Regulator
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" diam-
eter or greater to allow proper gas volume to heater. If
pipe is too small, undue loss of volume will occur.
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 21 on
page 12 for SVYD18PR/NR and FSVYD18PR/NR series, or Figure
22 on page 12 for SVYD18P/N and FSVYD18P/N series).
IMPORTANT: Install equipment shutoff valve in an accessible
location. The equipment 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 threads. This will prevent
excess sealant from going into pipe. Excess sealant in pipe could
result in clogged heater valves.
WARNING: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
INSTALLATION
Connecting to Gas Supply