www.desatech.com
901260-01C
7
INSTALLATION
Continued
Figure 5 - Checking Gas Joints
IMPORTANT:
Install equipment shutoff valve
in an accessible location. The equipment
shutoff valve is for turning on or shutting off
the gas to the appliance.
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 a clogged burner injector.
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 4, page
6. Locate sediment trap where it is within
reach for cleaning. Install in piping system
between fuel supply and heater. Locate sedi-
ment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture and
contaminants. This keeps them from going
into log set controls. If sediment trap is not
installed or is installed wrong, log set may
not run properly.
CHECkING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an open
flame to check for a leak. Apply a
noncorrosive leak detection fluid
to all joints. Bubbles forming show
a leak. Correct all leaks at once.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply piping
system. Pressures in excess of 1/2 psig
will damage heater regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
Gas Meter
Equipment
Shutoff
Valve
3. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
4. Check all joints of gas supply piping sys-
tem. Apply noncorrosive leak detection
fluid to gas joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Reconnect log set and equipment shutoff
valve to gas supply. Check reconnected
fittings for leaks.
TEST PRESSURES EQUAL TO OR LESS
THAN 1/2 PSIG (3.5 KPA)
1. Close equipment shutoff valve (see Fig-
ure 5).
2. Pressurize supply piping system by either
using compressed air or opening main gas
valve located on or near gas meter.
3. Check all joints from gas meter to equip-
ment shutoff valve (see Figure 5). Apply
mixture of liquid soap and water to gas
joints. Bubbles forming show a leak.
4. Correct all leaks at once.
HEARTH KIT ASSEMBLy AND
INSTALLATION
Kit Assembly
1. Unscrew burner inlet fitting from burner
manifold.
2. Place burner manifold in pan with
threaded opening facing open knockout
plug (see Figure 6, page 8). Make sure
the burner ports face downward.
3. Using thread sealant (resistant to the action
of propane/LP gas) on larger end of fitting,
screw the burner inlet fitting through hole
and into burner manifold. Tighten using a
wrench. If using propane/LP gas, follow
instructions included with kit for installation
and operation.
