Gas Specifications; Gas Inlet And Manifold Pressures; High Elevations; Odor During Operation - Vermont Castings 4030 - 4049 Installation And Operating Manual

UVS27 Vent-Free Gas Heater
Gas Specifications
Gas
Model Fuel Control BTU/h
UVS27RN Nat Millivolt
UVS27RP Prop Millivolt
UVS27MN Nat Millivolt
UVS27MP Prop Millivolt
*Natural Gas units with Glass & Catalyst installed; air
shutter is fully closed and rotated with bend outside of
burner for less restriction. Propane units have no air
shutter.
Firebox weight / shipping

Gas Inlet and Manifold Pressures

Inlet Minimum
Inlet Maximum
Manifold Pressure
UVS27R & UVS27M Vent-Free
Certified to:
ANSI Z21.11.2b-2004
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.
WARNING:
Failure to keep the primary air opening(s) of the
burner(s) clean may result in sooting and property
damage.
6
Max. Min.
Input Input
BTU/h Shutter*
28,000 19,500
Closed
28,000 19,500
28,000 19,500
Closed
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)
Input ratings are shown in BTU per hour and are
certified without deration from elevations up to
Air
4,500 feet (1,370m) above sea level.
Nuisance outages may occur at altitudes above
Fully
4,500 feet (1,370m) if dirt, dust, lint and/or cob-
webs are allowed to accumulate on burner and/
n/a
or ODS pilot. Monthly inspection and cleaning
Fully
is recommended for altitudes above 4,500 feet
(1,370m)
n/a
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.
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.

High Elevations

Odor During Operation

20007068