Desa VSL18NT, LSL18PT, LSL18NT, VSL18PT installation manual Installation, WARNING This appliance

INSTALLATION

Continued

Installing Bottom Mounting Screws

1.Locate two bottom mounting holes. These holes are near bottom on back panel of heater (see Figure 12).

2.Mark screw locations on wall.

3.Remove heater from mounting bracket.

4.If installing bottom mounting screws into hollow or solid wall, install wall anchors. Follow steps 1 through 4 under Attaching To Wall Anchor Method, page 10.

If installing bottom mounting screw into wall stud, drill holes at marked locations using 9/64" drill bit.

5.Replace heater onto mounting bracket.

6.Place spacers between bottom mounting holes and wall anchor or drilled hole.

7.Hold spacer in place with one hand. With other hand, insert mounting screw through bottom mounting hole and spacer. Place tip of screw in opening of wall anchor or drilled hole.

8.Tighten both screws until heater is firmly secured to wall. Do not over tighten.

Note: Do not replace front panel at this time. Replace front panel after making gas connec- tions and checking for leaks.

Front View

Heater

Wall

Spacer

Side View

Figure 12 - Installing Bottom Mounting

Screws

CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING:Aqualified service
personmustconnectheatertogas
supply. Follow all local codes.
WARNING: For natural
gas, never connect heater to
private (non-utility) gas wells.
This gas is commonly known
as wellhead gas.
IMPORTANT: For natural gas, check gas line
pressure before connecting heater to gas line. Gas
line pressure must be no greater than 10.5 inches of
water. If gas line pressure is higher, heater regula-
tor damage could occur.
CAUTION: For propane/LP
gas, never connect heater di-
rectly to the propane/LP supply.
This heater requires an external
regulator (not supplied). Install
theexternalregulatorbetweenthe
heater and propane/LP supply.
For propane/LP gas, the 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 pres-
sure, heater regulator damage could occur. Install
the external regulator with the vent pointing down
as shown in Figure 13. Pointing the vent down
protects it from freezing rain or sleet.
Propane/LP	External
Supply Tank
	Regulator
	Vent
	Pointing
	Down
Figure 13 - External Regulator With Vent
Pointing Down

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