Desa CGN10TLA - Manual (Page 9)

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OWNER’S MANUAL
CONNECTING TO GAS
SUPPLY
WARNING: A qualified ser-
vice person must connect heater
to gas supply. Follow all local
codes.
IMPORTANT: Check gas line pressure be-
fore connecting heater to gas line. Gas line
pressure must be no greater than 14 inches
of water. If gas line pressure is higher,
heater regulator damage could occur.
Installation must include an equipment
shutoff valve, ground joint union, and
plugged 1/8" NPT tap. Locate NPT tap within
reach for test gauge hook up. NPT tap must
be upstream from heater (see Figure 12).
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
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged heater valves.
Install sediment trap (trap) in supply line as
shown in Figure 12. 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 mois-
ture 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 pressure regulator
with wrench when connecting it to gas pip-
ing and/or fittings.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
your local codes. Use pipe 3/8"
diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
Continued
CAUTION: Use pipe joint seal-
ant that is resistant to liquid pe-
troleum (LP) gas.
* An CSA/AGA design-certified equipment shutoff valve with 1/8" NPT tap is an
acceptable alternative to test gauge connection. Purchase the optional CSA/AGA design-
certified equipment shutoff valve from your dealer. See Accessory, page 16.
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test
Gauge
Connection *
Pressure
Regulator
Tee
Joint
Pipe
Nipple
Cap
Sediment
Trap
Heater
Cabinet
3/8" NPT
Pipe Nipple
Ground Joint Union
Equipment
Shutoff
Valve *
From
External
Gas Meter
(5" W.C. to
10.5" W.C.
Pressure)
Figure 12 - Gas Connection
3" Minimum
INSTALLATION
Continued
WARNING: This appliance re-
quires a 3/8" NPT (National Pipe
Thread) inlet connection to the
pressure regulator.