Desa RH10PT - Manual (Page 10)

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INSTALLATION
Continued
Figure 14 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff Valve
CHECKING GAS CONNECTIONS
FOR PERMANENT GAS SUPPLY
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 detec-
tion 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 under
Connecting to Permanent Gas
Supply, page 8.
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 opening
propane/LP supply tank valve or using com-
pressed air.
4. Check all joints of gas supply piping system.
Apply a 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.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 14).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve or
using compressed air.
3. Check all joints from supply tank to equip-
ment shutoff valve (see Figure 15). Apply a
noncorrosive leak detection fluid to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 14).
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 thermostat gas valve (see Figure 15). Apply
a noncorrosive leak detection fluid to all joints.
Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Lighting Instructions, page
11). Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 12).
8. Replace front panel.
Propane/LP
Supply
Tank
Equipment
Shutoff
Valve
Control Valve Location
Figure 15 - Checking Gas Joints