Desa Tech SL30PT - Manual (Page 12)

12 104464
VENT-FREE PROPANE/LP GAS STOVE HEATER
ON
POSIT
O
POS
INSTALLATION
Continued
WARNING: Never use an open
flame to check for a leak. Apply a
mixture of liquid soap and water
to all joints. Bubbles forming
show a leak. Correct all leaks at
once.
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
CHECKING GAS
CONNECTIONS
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
equipment shutoff valve from gas sup-
ply piping system. Pressures in excess
of 1/2 psig will damage heater regulator.
2. Cap off open end of gas pipe where
equipment shutoff valve was connected.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Fig-
ure 20).
2. Pressurize supply piping system by either
using compressed air or opening propane/
LP supply tank valve.
3. Check all joints from gas meter to equip-
ment shutoff valve (see Figure 21). Ap-
ply mixture of liquid soap and water to
gas joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Figure 20- Equipment Shutoff Valve
Closed
Equipment
Shutoff
Valve
Open
Pressure Testing Heater Gas
Connections
1. Open equipment shutoff valve (see Fig-
ure 20).
2. Open propane/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 control valve (see Figure 21).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater,
page 13). Check all other internal joints
for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 13).
Figure 21 - Checking Gas Joints
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater. See guidelines under
Con-
necting to Gas Supply, page 11.
CAUTION: Avoid damage to
regulator. Hold gas regulator with
wrench when connecting it to gas
piping and/or fittings.
We recommend that you install a sediment
trap in supply line as shown in Figure 19,
page 11. Locate sediment trap where it is
within reach for cleaning. Install in piping
system between fuel supply and heater. Lo-
cate 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.
3. Pressurize supply piping system by ei-
ther using compressed air or opening
propane/LP supply tank valve.
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment
shutoff valve to gas supply. Check re-
connected fittings for leaks.
Control Valve Location
Propane/LP
Supply Tank
Equipment
Shutoff Valve