Comfort Glow RADIANT FLAME RFN28TD Owner's Operation And Installation Manual page 12

VENT-FREE NATURAL GAS HEATER
INSTALLATION
Continued
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 wellhead gas.
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.
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 of 1/2"
or greater diameter to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
Installation must include a manual shutoff
valve, 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 20).
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.
15,000 TO 28,000 BTU/HR
Install sediment trap in supply line as shown
in Figure 20, below. 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
3/8" NPT
Pipe Nipple
Tee Joint
Reducer
Test
Bushing to
Gauge
1/8" NPT
Connection *
1/8" NPT
Plug Tap
Tee Joint
Sediment
Pipe Nipple
Trap
Cap
Figure 20 - Gas Connection
* 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 Accessories, page 21.
Pressure
Regulator
12
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.
Note: Burner bracket
not shown for clarity
Ground
Union
Joint
Manual Shutoff Valve *
From Gas Meter
(5" W.C. to 10.5"
W.C. Pressure)
3" Minimum
Heater
Cabinet
104779