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NATURAL GAS HEATER
CONNECTING TO
GAS
SUPPLY
NOTICE: A qualified service per-
son must connect heater to gas
supply. Follow all local codes.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as well-head gas.
IMPORTANT: Check gas line pressure
before 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.
CAUTION: Use only new, black
iron or steel pipe. Internally-tinned
copper tubing may be used in
certain areas. Check your local
codes. Use pipe 3/8" diameter or
greater to allow proper gas vol-
ume to heater. If pipe is too small,
undue loss of pressure will oc-
cur.
Installation must include a manual 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).
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.
CAUTION: Use pipe joint seal-
ant that is resistant to liquid pe-
troleum (LP) gas.
Install sediment trap in supply line as shown
in Figure 12. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
ment 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.
CGN10A AND CGN6
IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/
or fittings.
3/8" NPT
Pipe
Nipple
Ground Joint Union
Manual Shutoff Valve *
From Gas
Meter
(4" W.C. to
10.5" W.C.
Pressure)
3" Minimum
* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual
shutoff valve from your dealer. See Accessory, page 15.
Figure 12 - Gas Connection
8
Pressure
Regulator
Heater
Cabinet
Tee Joint
Reducer
Test
Bushing to
Gauge
1/8" NPT
Connection *
1/8" NPT
Plug Tap
Tee
Joint
Sediment Trap
Pipe
Nipple
Cap
101870
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