Monessen Hearth DFX24C - Manual (Page 5)

33D4047 5
DFX & DBX Series Vent Free Fireplaces PRODUCT FEATURES
This vent-free fireplace must be mounted on the floor or
on the optional fireplace hearth.
OPERATION
This unvented gas heater requires no outside venting and
burns cleanly with high heating efficiency.
This zero-clearance unvented gas heater can be installed
against (or recessed into) any wall that is accessible to a
gas line.
FP2507
VFS DBX controls
Piezo
Ignition
Fireplace
Screen
Control
Knob
Figure 1 -
Unvented Gas Heater
(Control Access Door Shown Open)
On/Off Switch
FP507
GAS PRESSURES
Manual &
Control Fuel T-stat Millivolt
Regulator Pressure Nat. 4.0” w.c. 3.5” w.c.
Pilot Regulator Nat. n/a 3.5” w.c.
Max. Inlet Pressure Nat. 10.5” w.c. 10.5” w.c.
Min. Inlet Pressure Nat. 5.0” w.c. 5” w.c.
Regulator Pressure LP 10.0” w.c. 10.0” w.c.
Max. Inlet Pressure LP 13.0” w.c. 13.0” w.c.
Min. Inlet Pressure LP 11.0” w.c. 11.0” w.c.
Input BTU/hr
Model Fuel Control Max. Min.
4DFXNMC Nat. Manual ,000 15,000
4DFXPMC LP Manual ,000 17,000
4DFXNVC Nat. Millivolt ,000 17,000
4DFXPVC LP Millivolt ,000 17,000
3DFXNVC Nat. Millivolt 6,000 0,000
3DFXPVC LP Millivolt 6,000 0,000
DBX4NTC Nat. T-Stat 10,000 --
DBX4PTC LP T-Stat 10,000 --
GAS SPECIFICATIONS
NOTE: For LP models an external regulator is required
to reduce supply pressure to a maximum of 13" w.c.
IGNITION CONTROLS
Piezo ignitor allows ignition of the pilot without the use of
matches or batteries.
Manual control has four (4) positions:
OFF - All gas to the gas logs is shut off at the
valve.
IGN - Valve position to light/maintain a standing
pilot.
ON - Valve position to turn ON/OFF log set with
remote switch/thermostat.
LOW/HI - Variable position to control flame height
(heat output). Both front and rear burners
are in operation to provide realistic glow
and yellow flame.
Thermostat control has three (3) positions:
OFF - All gas to the gas logs is shut off at the
valve.
IGN - Valve position to light/maintain a standing
pilot.
LOW/HI - Variable position corresponding to desired
temperature.
PILOT
The gas log heater is fitted with a specially designed safety
pilot light which senses the amount of oxygen available in
the room and shuts the gas log heater off if the oxygen level
begins to drop below a satisfactory level. The pilot can only
be relit when adequate fresh air is available.
THERMAL GENERATOR
The millivolt gas log pilot is fitted with a millivolt generator
to provide power for remote activation.