Operating instructions
5
DFX & DBX Series Vent Free Fireplaces
This vent-free replace must be mounted on the oor or
on the optional replace hearth.
This unvented gas heater requires no outside venting and
burns cleanly with high heating efciency.
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 Knobs
Figure 1 -
Unvented Gas Heater
(Control Access Door Shown Open)
On/Off Switch
FP407
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. 5.0” 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.
DFX4NVC Nat. Millivolt ,000 17,000
DFX4PVC LP Millivolt ,000 17,000
DFX3NVC Nat. Millivolt 6,000 0,000
DFX3PVC LP Millivolt 6,000 0,000
DBX4NTC Nat. T-Stat 10,000 --
DBX4PTC LP T-Stat 10,000 --
For LP models an external regulator is required
to reduce supply pressure to a maximum of 13" w.c.
Piezo ignitor allows ignition of the pilot without the use of
matches or batteries.
- All gas to the gas logs is shut off at the
valve.
- Valve position to light/maintain a standing
pilot.
- Variable position corresponding to desired
temperature.
The gas log heater is tted 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.
The millivolt gas log pilot is tted with a millivolt generator
to provide power for remote activation.