Checking Gas Connections - Procom MN200HBA-B Owner's Operation And Installation Manual

The installer must supply an external regula-
tor. The external regulator will reduce incom-
ing gas pressure. You must reduce incoming
gas pressure to between 11" and 14" of water.
If you do not reduce incoming gas pressure,
heater regulator damage could occur. Install
external regulator with the vent pointing down
as shown in Figure 14. Pointing the vent down
protects it from freezing rain or sleet.
Pressure
Regulator
Ground
Joint
Union
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Tee
Joint
Sediment
Pipe
Trap
Nipple
Cap
Figure 14- Gas Connection
* Purchase the optional CSA design-certified equipment
shutoff valve from your dealer.
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 detection
fluid to all joints. If bubbles form,
there is a leak. Correct all leaks
at once.
200158-03A
INSTALLATION
Equipment
Shutoff Valve
3" Minimum

CHECKING GAS CONNECTIONS

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Install sediment trap in supply line as shown
in Figure 13. Place sediment trap where it
is within reach for cleaning. Place sediment
trap where trapped matter is not likely to
freeze. A sediment trap traps moisture and
contaminants. This keeps them from going
into heater controls. If sediment trap is not
installed or is installed wrong, heater may
not run properly.
3/8" NPT
Pipe Nipple
From External
Regulator
(11" W.C.**
to 14" W.C.
Figure 15 - External Regulator
Pressure)
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
1. Disconnect heater with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping sys-
tem. 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.
External
Regulator with
Propane
Vent Pointing
Supply Tank
Down
with Vent Pointing Down
(3.5 kPa)
13