Desa LDL3924NR Owner's Operation And Installation Manual page 15

INSTALLATION
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external to unit, for leaks
after installing or servicing. Cor-
rect 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.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply
and heater. See guidelines un-
der Connecting to Gas Supply,
page 13.
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 supply 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.
3. 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.
4. Check all joints of gas supply piping system.
Apply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve
to gas supply. Check reconnected fittings for
leaks.
Available from Allparts Equipment and Accessories - 1-877-475-5660 - www.allpartsinc.com
Continued
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 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 equipment
shutoff valve for natural gas or propane/LP
supply to equipment shutoff valve for propane/
LP (see Figures 18 and 19). Apply noncorro-
sive 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
Gas Control
Valve Location
Equipment
Shutoff Valve
Figure 18 - Checking Gas Joints
(Propane/LP only)
Equipment
Shutoff Valve
Gas Control
Valve Location
Figure 19 - Checking Gas Joints (Natural
Gas only)
Open
Closed
Propane/LP
Supply Tank
Gas Meter