Product Features; Operation; Gas Pressures; Gas Specifications And Orifice Sizes - Monessen Hearth VFF32LI Installation & Operating Instructions Manual

VFF Vent Free Fireplace System
Fireplace
Screen
On/Off Switch
Piezo Ignition
Control Knobs
Figure 1. VFF Shown with Control Access Door Open

OPERATION

This unvented gas heater requires no outside venting
and burns cleanly with excellent heating efficiency. As a
zero-clearance appliance, it can be installed against (or
recessed into) any wall that is accessible to a gas line.

GAS PRESSURES

Control
Regulator Pressure
Pilot Regulator
Max. Inlet Pressure
Min. Inlet Pressure
Regulator Pressure
Max. Inlet Pressure
Min. Inlet Pressure
Fuel Millivolt and IPI
Nat. 3.5" w.c.
Nat. 3.5" w.c.
Nat. 10.5" w.c.
Nat. 5.0" w.c.
LP 10.0" w.c.
LP 13.0" w.c.
LP 11.0" w.c.
Monessen • VFF 32/36 Owner Manual • 20308184 • Rev F • 02/19

GAS SPECIFICATIONS AND ORIFICE SIZES

MODEL FUEL CONTROL
VFF32CNV NAT MILLIVOLT 37,000 25,000
VFF32CPV LP MILLIVOLT 36,000 28,000
VFF32CNI NAT IPI
VFF32CPI LP IPI
VFF32LNV NAT MILLIVOLT 37,000 25,000
VFF32LPV LP MILLIVOLT 36,000 28,000
VFF32LNI NAT IPI
VFF32LPI LP IPI
VFF36CNV NAT MILLIVOLT 37,000 25,000
VFF36CPV LP MILLIVOLT 36,000 28,000
VFF36CNI NAT IPI
VFF36CPI LP IPI
VFF36LNV NAT MILLIVOLT 37,000 25,000
VFF36LPV LP MILLIVOLT 36,000 28,000
VFF36LNI NAT IPI
VFF36LPI LP IPI
NOTE: For LP models an external regulator is required
to reduce supply pressure to a maximum of 13" w.c.
IGNITION CONTROLS (MILLIVOLT ONLY)
Piezo ignitor allows ignition of the pilot without the use of
matches or batteries.
Millivolt 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).
THERMAL GENERATOR (MILLIVOLT ONLY)
The millivolt gas log pilot is fitted with a millivolt generator
to provide power for remote activation.
PILOT
The gas log heater is fitted with a specially designed safety
pilot light (ODS assembly) 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 re-lit when adequate fresh air
is available.

PRODUCT FEATURES

MAX MIN ORIFICE
BTU BTU SIZE
3.00mm
#49
37,000 25,000 3.00mm
36,000 28,000 #49
3.00mm
#49
37,000 25,000 3.00mm
36,000 28,000 #49
3.00mm
#49
37,000 25,000 3.00mm
36,000 28,000 #49
3.00mm
#49
37,000 25,000 3.00mm
36,000 28,000 #49
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