Monessen Hearth DFX24C - Manual (Page 13)

33D4047 13
DFX & DBX Series Vent Free Fireplaces FIREPLACE INSTALLATION
NOTICE: A qualified gas appliance installer must connect the heater to the gas supply.
Consult all local codes.
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ARNING
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 1/8" NPT pressure tapping point should be
installed upstream of the appliance. Figure 10
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 11
FP2447
gas connection
3” Min.
To Fireplace
Pipe Coupling
Stainless
Flexible Tube
Pipe
Locations Pressure Tapping
Point Installation
Manual Shutoff
Valve
Gas Supply
Inlet
FP447
Figure 11 -
Gas Connection
Tee Joint
Pipe Nipple
Cap
Sediment
Trap
IMPORTANT: Loosen the pipe adapter on the flex tube before installing to the system
piping.
Always use an external regulator for all propane/LPG heaters 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.
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.
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ARNING