Desa VUL18NR Owner's Operation And Installation Manual page 17

Unvented (vent-free) gas log heater
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Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Fig-
ure 17).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
3. Check all joints from gas meter to equip-
ment shutoff valve for natural gas or
propane/LP supply to equipment shutoff
valve for propane/LP (see Figure 18 or 19).
Apply noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Equipment
Shutoff
Valve
Figure 17 - Equipment Shutoff Valve
Propane/LP
Supply Tank
Figure 18 - Checking Gas Joints
(Propane/LP Only)
Equipment Shutoff Valve
Gas Meter
Figure 19 - Checking Gas Joints (Natural
Gas Only)
122001-01C
INSTALLATION
Open
Closed
Equipment
Shutoff Valve
Thermostat Gas
Valve or Control
Valve Location
Thermostat Gas Valve or
Control Valve Location
www.desatech.com
Continued
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Fig-
ure 17).
2. Open main gas valve located on or near
gas meter for natural gas or open pro-
pane/LP supply tank valve.
3. Make sure control knob of heater is in the
OFF position.
4. Check all joints from equipment shutoff
valve to thermostat gas valve (Thermo-
stat-Controlled Models) or to gas control
(Remote-Ready Models) (see Figure 18 or
19). Apply noncorrosive leak detection fluid
to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 21 or
23, depending on your model). Check all
other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 21 or page 24, depending
on your model).
INSTALLING OPTIONAL REMOTE
ACCESSORIES
Installing Remote Receiver
Remote control accessories are available
separately (see Accessories, page 40).
1. If unit is already installed in fireplace, con-
tinue with these instructions. If unit has not
been installed in fireplace, go to step 6 and
continue installation of remote accessory.
WARNING: Turn off heater
and let cool before handling any
part of heater. Make sure gas is
turned of to unit.
2. Carefully remove logs and set aside.
3. Locate mounting screws on sides of heat-
er base assembly and remove screws. Set
screws aside for reinstallation.
4. Disconnect gas line from heater base as
shown in Figure 11 or 12, page 14.
WARNING: A qualified ser-
vice person must connect and
disconnect gas to heater. Follow
all local codes.
17

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