Connect The Gas - Monessen Hearth AVFL42NTSC Installation & Operating Instructions Manual

FIREPLACE INSTALLATION

CONNECT THE GAS

NOTICE: A qualified gas appliance installer must connect
the heater to the gas supply. Consult all local codes.
WARNING
This appliance is equipped for either natural or
propane gas. Field conversion is not permitted.
Use new black iron or steel pipe. Internally
tinned copper or copper tubing can be
used per National Fuel Code, section 2.6.3,
providing gas meets hydrogen sulfide limits,
and where permitted by local codes. Gas
piping system must be sized to provide
minimum inlet pressure (Listed on Data
Plate) at the maximum flow rate (BTU/hr).
Undue pressure loss will occur if the pipe
is too small.
A manual shutoff valve must be installed
upstream of the appliance. Union tee
and plugged ⁄
1
point should be installed upstream of the
appliance. Figure 7
A sediment trap should be installed upstream
to prevent moisture and contaminants from
passing through the pipe to appliance
controls and burners. Failure to do so
could prevent the appliance from operating
reliable. Figure 7
To Fireplace
Figure 7 –
Gas Connection
Monessen • AVFL42 Installation Instructions • 20305467 Rev. B • 02/17
" NPT pressure tapping
8
Stainless
Flexible Tube
Manual Shutoff
Valve
Sediment
Trap
CHECK GAS TYPE: The gas supply must
be the same as stated on the heater's rating
plate. If the gas supply is different, DO NOT
INSTALL THE HEATER. Contact your dealer
for the correct model.
IMPORTANT: Loosen the pipe adapter on the flex tube
before installing to the system piping.
Always use an external regulator for all propane/LPG heat-
ers only, to reduce the supply tank pressure to a maximum
of 13" w.c. This is in addition to the internal regulator in the
heater valve.
When tightening the joint to the valve, hold the valve
securely to prevent movement.
Test all gas joints from the gas meter to the heater valve for
leaks using a gas analyzer or soap and water solution after
completing connection. DO NOT USE AN OPEN FLAME.
Connecting directly to an unregulated
propane/LP tank can cause an
explosion.
DO NOT USE OPEN FLAME TO CHECK
FOR GAS LEAKS.
Pipe
Coupling
Pipe
Locations Pressure Tapping
Point Installation
Tee Joint
Pipe Nipple
Cap
FP2447
AVFL Vent Free Fireplace
Gas Supply
Inlet
3" minimum
11