Gas Specifications; Gas Inlet And Manifold Pressures; High Elevations; Odor During Operation - Vermont Castings 4030 - 4036 Installation And Operating Manual

UVS27 Vent-Free Gas Heater
Gas Specifications
Model Fuel Gas Control
UVS27RN Nat
UVS27RP Prop
UVS27MN Nat
UVS27MP Prop
Firebox weight / shipping

Gas Inlet and Manifold Pressures

Inlet Minimum
Inlet Maximum
Manifold Pressure
UVS27R & UVS27M Vent-Free
Certified to:
ANSI Z21.11.2a-2001
Unvented Heaters
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/NFPA 54 - 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.
This appliance may be installed in an af-
termarket* 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.
6
Max. Min.
Input Input
BTU/h BTU/h
Millivolt 28,000 19,500
Millivolt 28,000 19,500
Millivolt 28,000 19,500
Millivolt 28,000 19,500
110 lbs.
Natural LP (Propane)
5.5" w.c. 11" w.c.
14" w.c. 14" w.c.
3.5" w.c. 10" w.c. (MP)
11" w.c. (RP)

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), instal-
lations must be in accordance with the current
ANSI Z223.1/NFPA 54 and/or local codes having
jurisdiction.
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 occasional-
ly be produced during heater operation when impuri-
ties 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.
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