Owner's Manual
13
103508
OWNER’S MANUAL
CONNECTING TO GAS
SUPPLY
NOTICE: A qualified service per-
son 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 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.
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
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.
CAUTION: Use pipe joint seal-
ant that is resistant to liquid pe-
troleum (LP) gas.
INSTALLATION
Continued
C. MOUNTING HEATER
WITH
OPTIONAL HEARTH BASE
TO OPTIONAL MANTEL See
instructions included with
mantel kit.
Assembling Mantel
IMPORTANT:
Only use the optional man-
tels specified in this manual. See Accesso-
ries, pages 24 and 25 for proper mantel kits.
This heater is only approved for use with
models GMF800(A,B)/GMU801(A,B),
GM900F(A,B)/GM901U(A,B), GM700F/
GM701U, GMC22F/GMC23U/GMC24U,
GMC32F(B)/GMC33U(B), and GMC26F/
GMC27U/GMC28F mantel kits. Using any
other mantel will void the A.G.A. approval
for this heater. Do not use models
GMF800(A,B)/GMU801(A,B),
GM900F(A,B)/GM901U(A,B), and
GM700F/GM701U, GMC22F/GMC23U/
GMC24U, GMC32F(B)/GMC33U(B), and
GMC26F/GMC27U/GMC28F mantels with
any other product. Before installing mantel
to heater, the heater must be mounted on the
optional hearth base.
Installing Mantel to Heater
WARNING: If installing the
GHB802 or GHB802A base on
heater, and using with a GA se-
ries heater blower accessory
along with a GS601 surround or a
GM800 or GM900 series mantel,
the surround or mantel clearance
to back wall should be 3/4 inch.
This will improve flame appear-
ance and combustion.
Use only a GHB802B, GHB802C,
OR GHB38 series hearth base if
using a GA series heater blower
accessory with a GM700 series,
GMC32F series, or GMC33U se-
ries mantel.
Install sediment trap in supply line as shown
in Figure 20. 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.
CAUTION: Avoid damage to
control. Hold gas fitting with
wrench when connecting it to gas
piping and/or fittings.
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, pages 24 and 25.
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test
Gauge
Connection *
Tee Joint
Pipe
Nipple
Cap
Sediment
Trap
Pressure
Regulator
3/8" NPT
Pipe Nipple
Ground Union
Joint
Heater
Cabinet
3" Minimum
Note:
Burner
bracket not
shown for clarity
Manual Shutoff Valve *
From Gas Meter
(4" W.C. to 10.5" W.C.
Pressure)
Continued