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118620-01E
13
INSTALLATION
Continued
IMPORTANT:
Install an equipment shutoff
valve in an accessible location. The equip
-
ment shutoff valve is for turning on or shutting
off the gas to the appliance.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could
result in clogged heater valves.
* A CSA design-certified equipment shutoff
valve with 1/8" NPT tap is an acceptable al
-
ternative to test gauge connection. Purchase
the optional CSA design-certified equipment
shutoff valve from your dealer. See
Acces-
sories
, page 27.
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test Gauge Connection*
3/8" NPT
Pipe
Nipple
Heater
Cabinet
Equipment
Shutoff
Valve*
3"
Min.
Natural Gas
From Gas
Meter
(4" W.C. to
10.5" W.C. Pressure)
Propane/LP
From External Regulator
(11" W.C. to 14" W.C.
Pressure)
Ground Joint
Union
Tee Joint
Pipe
Nipple
Cap
Sediment
T
rap
Figure 17- Gas Connection
Pressure
Regulator
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
gas, make sure external regula
-
tor has been installed between
propane/LP supply and heater.
See guidelines under
Connect-
ing to Gas Supply
, page 12.
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
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.
Connection Using Flexline
3/8" NPT/
1/2" Flare
90° Elbow
Flexline
See
illustration
above for
detail
Refer to connector's
instructions
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Install sediment trap in supply line as shown
in Figure 17. Locate sediment trap where it
is within reach for cleaning. Locate 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.
IMPORTANT:
Hold the pressure regulator
with wrench when connecting it to gas pip
-
ing and/or fittings. Do not over tighten pipe
connection to regulator. The regulator body
could be damaged.
