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Vermont Castings UVS27 Vent-Free Gas Heater
20005004
Gas Specifications
Max. Min.
Input Input
Model Fuel Gas Control BTU/h BTU/h
UVS27RN Nat Millivolt 28,000 19,500
UVS27RP Prop Millivolt 28,000 19,500
UVS27MN Nat Millivolt 28,000 19,500
UVS27MP Prop Millivolt 28,000 19,500
Firebox weight / shipping 110 lbs.
The installation of your Vermont Castings stove must
conform with local codes, or in the absence of local
codes, with the National Fuel Gas Code ANSI
Z223.1 - latest edition. (EXCEPTION: Do not derate
this appliance for altitude up to 4,500 feet (1,370m).
Maintain the manifold pressure at 3.5” w.c. for
Natural Gas and 11.0” w.c. for LP Gas.
UVS27R & UVS27M Vent-Free
Certified to:
ANSI Z21.11.2a-2001
Unvented Heaters
High Elevations
Input ratings are shown in BTU per hour and are
certified without deration from elevations up to
4,500 feet (1,370m) above sea level.
Nuisance outages may occur at altitudes above
4,500 feet (1,370m) if dirt, dust, lint and/or cob-
webs are allowed to accumulate on burner and/or
ODS pilot. Monthly inspection and cleaning is
recommended for altitudes above 4,500 feet
(1,370m)
For elevations above 4,500 feet (1,370m), installa-
tions must be in accordance with the current
ANSI Z223.1 and/or local codes having jurisdic-
tion.
WARNING: Improper installation, adjust-
ment, alteration, service or maintenance can
cause injury or property damage. Refer to
this manual for correct installation and
operational procedures. For assistance or
additional information consult a qualified
installer, service agency, or the gas supplier.
Odor During Operation
Neither natural gas nor propane gas give off an odor
when burned. The nature of a vent free combustion
system, however, is such that odors may occasion-
ally be produced during heater operation when
impurities exist in the immediate area. Cleaning
solutions, paint, solvents, cigarette smoke, candles,
adhesives, new carpet or textiles, etc., all can create
fumes. These fumes may mix with combustion air
and can create odor. Such odors will disappear over
time, however the condition can be alleviated by
opening a window or otherwise providing additional
ventilation to the area.
Inlet Minimum 5.5” w.c. 11” w.c.
Inlet Maximum 14” w.c. 14” w.c.
Manifold Pressure 3.5” w.c. 10” w.c. (MP)
11” w.c. (RP)
Gas Inlet and Manifold Pressures
Natural LP (Propane)
This appliance may be installed in an
aftermarket* manufactured (mobile)
home, where not prohibited by state or
local codes.
This appliance is to be used only with the
type of gas specified on the rating plate
which is attached to the rear panel. This
appliance is not convertible for use with
other gases.
*Aftermarket: Completion of sale, not for purpose of resale, from
the manufacturer.