Desa FVFM27NR/PR - Manual (Page 12)

108382-01E
12
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Figure 17 - Checking Gas Joints for Propane/LP Gas
Control Valve Location
Propane/LP
Supply Tank
Equipment Shutoff Valve
Figure 16 - Checking Gas Joints for Natural Gas
Gas Meter
Equipment Shutoff Valve
Control Valve
Location
WARNING: Test all gas piping and connections,
internal and external to unit, for leaks after installing
or servicing. Correct all leaks at once.
CHECKING GAS CONNECTIONS
INSTALLATION
Continued
ON
POSIT
O
POS
Figure 15 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff
Valve
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 (con-
trol valve) and equipment shutoff valve from gas supply pip-
ing 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 a noncorrosive
leak detection fluid to gas 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 15).
2. Pressurize supply piping system by either opening propane/LP sup-
ply tank valve for propane/LP gas, or opening main gas valve lo-
cated on or near gas meter for natural gas, or using compressed air.
3. Check all joints from propane/LP supply tank to equipment
shutoff valve (see Figure 15). Apply a noncorrosive leak de-
tection fluid to gas joints. Bubbles forming show a leak.
4. 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.
CAUTION: For propane/LP gas, make sure exter-
nal regulator has been installed between propane/LP
supply and heater. See guidelines under
Connecting
to Gas Supply, pages 10 and 11.
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve (see Figure 15).
2. Open main gas valve located on or near gas meter for natural
gas or 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 16 or 17). Apply a noncorrosive leak detection fluid
to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 14 through 16).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 15).
INSTALLATION
Checking Gas Connections