UVS27
Gas Specifications
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| Max. | Min. |
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| Gas | Input | Input | Air |
Model | Fuel | Control | BTU/h | BTU/h | Shutter* |
UVS27RN | Nat | Millivolt | 28,000 | 19,500 | Fully |
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| Closed |
UVS27RP | Prop | Millivolt | 28,000 | 19,500 | n/a |
UVS27MN | Nat | Millivolt | 28,000 | 19,500 | Fully |
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| Closed |
UVS27MP | Prop | Millivolt | 28,000 | 19,500 | n/a |
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*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 | 110 lbs. |
Gas Inlet and Manifold Pressures
| Natural | LP (Propane) |
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) |
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| 11” w.c. (RP) |
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UVS27R & UVS27M
Certified to:
ANSI
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.
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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