Installation – Desa SVYD18PRA User Manual

Page 12

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113084-01E

1

INSTALLATION

Continued

WARNING: Never connect

natural gas heater to private (non-

utility) gas wells. This gas is com-

monly known as wellhead gas.

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 27.

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 14. Make sure gas log heater

is secured to the stove cavity assembly.

For propane/LP units, installer must supply an ex-

ternal regulator. The external regulator will reduce

incoming gas pressure. You must reduce incoming

gas pressure to between 11" and 14" 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 15. Pointing the vent down protects it

from freezing rain or sleet.

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.

Figure 14 - Gas Regulator Location and

Gas Line Access Into Stove Cabinet

Gas Inlet
Connection
Access

Gas Log Heater

Back View

Side View

Figure 15 - External Regulator With Vent

Pointing Down

Back Stove
Panel

Stove Unit Front

Propane/LP
Supply Tank

External
Regulator

Vent
Pointing
Down

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 16

on page 13).
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 re-

quirements 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.

We recommend that you install a sediment trap

in supply line as shown in Figure 16, page 13.

Locate sediment trap where it is within reach for

cleaning. Install in piping system between fuel

supply and heater. Locate sediment trap where

trapped matter is not likely to freeze. A sediment

trap traps moisture and contaminants. This keeps

them from going into heater controls. If sediment

trap is not installed or is installed wrong, heater

may not run properly.

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