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125326-01A
12
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 detec-
tion fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: For propane/LP
units, make sure external regula-
tor has been installed between
propane/LP supply and heater.
See guidelines under
Connecting
to Gas Supply
, page 10.
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.
Pressures in excess of 1/2 psig will dam
-
age heater regulator.
2. Cap off open end of gas pipe where equip
-
ment 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 commercial leak detection solution
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 Fig
-
ure 14).
INSTALLATION
Continued
Equipment
Shutoff
Valve
Propane/LP
Supply Tank
Thermostat Gas Valve
Equipment
Shutoff
Valve
Gas
Meter
Thermostat Gas Valve
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 for natural
gas (see Figure 16)) or propane/LP supply
tank for propane/LP to equipment shutoff
valve (see Figure 15 or 16). Apply a non
-
corrosive leak detection fluid to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
Figure 15 - Checking Gas Joints for
Natural Gas (actual heater may vary from
illustration)
Figure 16 - Checking Gas Joints for
Propane/LP Gas (actual heater may vary
from illustration)
Open
Closed
Equipment
Shutoff Valve
Figure 14 - Equipment Shutoff Valve
