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121880-01B
13
INsTallaTIoN
Continued
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections 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
gas, make sure external regula-
tor has been installed between
propane/LP supply and heater.
See guidelines under
Connect-
ing to Gas Supply
, page 11.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(14" w.c.)
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 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 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.
Figure 16 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
Figure 18 - Checking Gas Joints for
Propane/LP Gas
Propane/LP
Supply Tank
Thermostat
Gas Valve
Figure 17 - Checking Gas Joints for
Natural Gas
Equipment Shutoff Valve
Gas
Meter
Thermostat Gas Valve
Open
Closed
Equipment Shutoff Valve
Test Pressures Equal To or Less Than
1/2 PSIG (14" w.c.)
1. Close equipment shutoff valve (see Fig
-
ure 16).
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 17) or propane/LP supply
tank for propane/LP gas, to equipment
shutoff valve (see Figure 18). Apply a non
-
corrosive 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 16).
2. For natural gas open main gas valve locat
-
ed on or near gas meter. For propane/LP
gas open propane/LP supply tank valve.
