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105274
UNVENTED PROPANE/LP GAS LOG HEATER
VANGUARD FLAME-MAX
®
Figure 14 - Gas Connection
* Purchase the optional A.G.A. design-certified manual shutoff valve from your dealer.
See Accessories, page 25.
** Minimum inlet pressure for purpose of input adjustment.
CONNECTING TO GAS
SUPPLY
NOTICE: A qualified service per-
son must connect heater to gas
supply. Follow all local codes.
CAUTION: Never connect
heater directly to the propane
supply. This heater requires an
external regulator (not supplied).
Install the external regulator be-
tween the heater and propane
supply.
Installation Items Needed
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer,
see above)
• piping (check local codes)
• sealant (resistant to LP gas)
• manual shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 25.
The installer must supply an external regu-
lator. The external regulator will reduce
incoming gas pressure. You must reduce
incoming gas pressure to between 11 and
14 inches of water. If you do not reduce
incoming gas pressure, heater regulator
damage could occur. Install external regu-
lator with the vent pointing down as shown
in Figure 13. Pointing the vent down pro-
tects it from freezing rain or sleet.
INSTALLATION
Continued
WARNING: Never connect
heater to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
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 14).
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 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"
diameter or greater to allow
proper gas volume to heater. If
pipe is too small, undue loss of
pressure will occur.
Install sediment trap in supply line as shown
in Figure 14. 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: Use pipe joint seal-
ant that is resistant to liquid pe-
troleum (LP) gas.
CAUTION: Avoid damage to
control. Hold fitting with wrench
when connecting it to gas piping
and/or fittings.
Figure 13 - External Regulator With Vent
Pointing Down
Propane
Supply
Tank
External Regulator
Vent Pointing Down
3" Minimum
Sediment
Trap
Gas Control
From External
Regulator (11" W.C.**
to 14" W.C. Pressure)
A.G.A. Design-Certified
Manual Shutoff Valve With
1/8" NPT Tap*
Approved Flexible
Gas Hose (if
allowed by local
codes)
Tee Joint
Pipe Nipple
Cap