6
UVS27 Vent-Free Gas Heater
20007068
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/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.
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.
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)
Natural LP (Propane)
Failure to keep the primary air opening(s) of the
burner(s) clean may result in sooting and property
damage.
*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.
UVS27RN Nat Millivolt 28,000 19,500 Fully
Closed
UVS27RP Prop Millivolt 28,000 19,500 n/a
UVS27MN Nat Millivolt 28,000 19,500 Fully
Closed
UVS27MP Prop Millivolt 28,000 19,500 n/a
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