Vermont Casting 3032 Vent Free Features, Fresh Air Requirements for Combustion, and Ventilation

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Vent Free Features

Vermont Castings UVS27 Vent-Free Gas Heater

Vent Free Features

The UVS27, Model Nos. 3030 thru 3033, is an unvented gas heating appliance tested and listed to the ANSI standard Z21.11.2a-2001. This appliance is specifically configured to burn either Natural Gas or Propane fuel, as indicated on the metal rating plate attached to the rear shroud. The UVS27 is not fuel convertible.

The firebox is shipped fully assembled and ready for installation with either the Stardance (SUV) or the Pinnacle (PUV) shell assemblies.

The firebox assembly is composed of the NG or LP Burner, a base plalte, firebox and screen. The log set, burner tube, gas valve and pilot comprise the Burner assembly. (Fig. 1)

The UVS27M is equipped with an SIT control for manual use only.

The UVS27R is equipped with a Honeywell control valve that allows thermostatic control, on/off switch or a remote switch (not supplied).

Both models incorporate variable regulators that allow you to adjust burner heat output between HIGH, (28,000 BTU), and LOW, (19,500 BTU). See the Operation Section for details.

The standing pilot incorporates an Oxygen Depletion System (ODS/pilot) designed to shut off the appliance if enough fresh air is not available.

Fresh Air Requirements for Combustion

and Ventilation

WARNING

This heater must have fresh air for proper operation. If not, poor fuel combustion could result. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

Modern construction standards have resulted in homes that are highly energy-efficient and that allow little heat loss. Your home needs to breathe, however, and all fuel-burning appliances within it require fresh air in order to function properly and safely. Exhaust fans, clothes dryers, fireplaces, and other fuel burning appliances all use the air inside the building. If the available fresh air is insufficient to meet the demands of these appliances, problems can result.

The UVS27R/M Unvented heater has specific fresh air requirements. You must determine that these fresh air requirements will be met within the space where the appliance will be installed. The following informa- tion will help you insure that adequate fresh air is available for the heater to function properly.

Provide For Adequate Ventilation

Any space within a home can be classified in the following categories:

1)Unusually Tight Construction

2)Confined Space

3)Unconfined Space

First, determine which classification defines the intended space.

Unusually Tight Construction

You must provide additional fresh air if the space falls into this classification. Unusually Tight Construction is defined as construction wherein:

a.walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of one perm or less with openings gasketed or sealed and

b.weather stripping has been added on openable windows and doors and

c.caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas lines, and at other openings.

If your home meets all of the three criteria above, you must provide supplemental fresh air for the appliance from outside the home as detailed on page 7, B.

If your home does not meet the above criteria, follow the procedure below.

Determine if You Have a Confined or

Unconfined Space

Use the following formula to determine if you have a confined or unconfined space.

Space is defined as the room in which you will install the heater plus any adjoining rooms with doorless passageways or ventilation grilles between the rooms. The National Fuel Gas Code defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour, (4.8 m3 per kw), of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour, (4.8

m3 per kw), of the aggregate input rating of all appli- ances installed in that space. Rooms communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space.

1.Determine the volume of space, (length x width x

height). Include adjoining rooms connected by doorless passageways or ventilating grilles.

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Contents INSTALLER / CONSUMER SAFETY INFORMATION Homeowner’s InstallationWHATTO DO IF YOU SMELL GAS Do not try to light any appli- anceVermont Castings UVS27 Vent-FreeGas Heater Table Of Contents20005004 Vermont Castings UVS27 Vent-FreeGas Heater Installation & Operating Instructions20005004 Freestanding Stove Shell DimensionsVermont Castings UVS27 Vent-FreeGas Heater 20005004Vermont Castings UVS27 Vent-FreeGas Heater Clearance RequirementsMinimum Clearances to Combustible Materials Hearth RequirementsANSI Z21.11.2a-2001 Unvented Heaters Gas SpecificationsGas Inlet and Manifold Pressures UVS27R & UVS27M Vent-Free Certified toProvide For Adequate Ventilation Vent Free FeaturesFresh Air Requirements for Combustion and Ventilation20005004 W A R N I N GVermont Castings UVS27 Vent-FreeGas Heater W A R N I N GVermont Castings UVS27 Vent-FreeGas Heater Assembly ProceduresShell / Firebox Assembly Unpack the FireboxVermont Castings UVS27 Vent-FreeGas Heater Install Optional Fan Kit20005004 Vermont Castings UVS27 Vent-FreeGas Heater Install ON/OFF Switch20005004 20005004 Glass & Catalyst InstallationThermostat Connection Optional Vermont Castings UVS27 Vent-FreeGas HeaterVermont Castings UVS27 Vent-FreeGas Heater Connect the Gas Supply Line20005004 Vermont Castings UVS27 Vent-FreeGas Heater Install Log Set20005004 Vermont Castings UVS27 Vent-FreeGas Heater Complete the Installation20005004 Your First Fire Flame & Temperature AdjustmentFlame Characteristics OperationTo Turn Off Gas To Heater FOR YOUR SAFETY READ BEFORE LIGHTINGLighting and Operating Instructions Lighting InstructionsVermont Castings UVS27 Vent-FreeGas Heater TroubleshootingCONDITION POSSIBLE CAUSEPOSSIBLE CAUSE Troubleshooting cont’dVermont Castings UVS27 Vent-FreeGas Heater CONDITIONGlass Replacement MaintenanceFirebox Cleaning and Inspection Cleaning ProcedureReplace The Combustor Module Clean the Combustor ModuleCatalytic Combustor Remove the Combustor Module20005004 ModelsUVS27R, UVS27M Vent Free Gas Heaters Vermont Castings UVS27 Vent-FreeGas Heater20005004 UVS27R, UVS27M Vent Free Gas HeatersModels 3030, 3031, 3032, 3033 continued Vermont Castings UVS27 Vent-FreeGas HeaterShell Enamel Part Numbers - Hearthmount UVS27R, UVS27M Vent Free Gas HeatersVermont Castings UVS27 Vent-FreeGas Heater Models 3030, 3031, 3032, 3033 continuedGlass / Catalyst Kit UVGODCFK Optional Accessories AvailableRemote Controls Fan KitsVermont Castings UVS27 Vent-FreeGas Heater LIMITED LIFETIME WARRANTYPRODUCT COVERED BY THIS WARRANTY IF WARRANTY SERVICE IS NEEDED…