Desa VFRMV18NB, VFRMV18PB Air For Combustion Ventilation, Providing Adequate Ventilation

Page 6

Air For Combustion

and Ventilation

WARNING: This heater shall not be installed in confined space or unusually tight con- struction unless provisions are provided for adequate combus- tion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

Today’s homes are built more energy efficient than ever. New materials, increased insulation and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as possible. While it is good to make your home energy effi- cient, your home needs to breathe. Fresh air must enter your home. All fuel-burning appliances need fresh air for proper combustion and ventilation.

Exhaust fans, fireplaces, clothes dryers and fuel burning appliances draw air from the house to operate. You must provide adequate fresh air for these appliances. This will insure proper venting of vented fuel-burning appliances.

PROVIDING ADEQUATE

VENTILATION

The following are excerpts from National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three fol- lowing ventilation classifications:

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 6 through 8 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Unusually tight construction is defined as construction where:

a.Walls and ceilings exposed to the out- side atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10-11kg per pa-sec-m2) 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 ad- ditional fresh air. See Ventilation Air From Outdoors, page 6.

If your home does not meet all of the three criteria above, proceed to Determining Fresh-Air Flow For Appliance Location.

Confined and Unconfined Space

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose vol- ume 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 appliances 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.

*Adjoining rooms are communicating only if there are odorless passageways or ventilation grills between them.

DETERMINING FRESH-AIR FLOW

FOR Appliance LOCATION

Determining if You Have a Confined or

Unconfined Space

Use this work sheet to determine if you have a confined or unconfined space.

Space: Includes the room in which you will install appliance plus any adjoining rooms with door- less passageways or ventilation grills between the rooms.

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Contents Models VFRMV18NB, VFRMV18PB VFRMV24NB and VFRMV24PB Ansi Z21.11.2b-2004 Ansi Z21.60-2003Table of Contents Safety Information Safety Information Product Identification Optional Remote Control AccessoriesProduct Features Local CodesDetermining FRESH-AIR Flow Air For Combustion VentilationProviding Adequate Ventilation For Appliance LocationAIR for Combustion Ventilation Ventilation AIRVentilation Air From Inside Building Installation Ventilation Air From OutdoorsInstallation and Clearances for vent-free operation Check GAS TypeCeiling Safe Installation Minimum Noncombustible Material ClearancesMantel Clearances Floor ClearancesInstalling Heater Assembly Installing Damper Clamp Accessory for Vented OperationInstalling Remote Control Accessory bracket Masonry Manufactured FireplaceFireplaceConnecting to GAS Supply Installation Items NeededPressure Testing Gas Supply Propane/LP From Checking GAS ConnectionsPressure Testing Heater Gas Connections Piping System Test Pressures In Excess Of 1/2 Psig KPaTest Pressures Equal To or Less Than Psig 3.5 kPa For Your Safety Read Before Lighting Operating HeaterLighting Instructions Propane/LPNatural Operating HeaterTo Turn OFF GAS To Appliance Shutting Off HeaterRemote Operation Manual Lighting ProcedureOptional Hand-Held On/Off Series Model HRC100Key Pad Lock Feature Safety FeaturesAuto Shutoff Feature Inspecting BurnersCleaning Maintenance Burner Flame PatternBurner Injector Holder Pilot Air Inlet Hole Technical Service Cleaning MaintenanceWiring Diagram Propane/LPTroubleshooting Observed Problem Possible Cause RemedyTroubleshooting Maintenance,Operation Processes and logs curing Hours of operation Gas leak. See warning Checking Gas ConnectionsService Hints SpecificationsReplacement Parts AccessoriesAccessories Illustrated Parts Breakdown Models VFRMV18NB, VFRMV18PB, VFRMV24NB Shown and VFRMV24PBParts List 116412-01B 116412-01B Warranty Information Keep this WarrantyLimited Warranty VENT-FREE GAS LOG Heaters

VFRMV18PB, VFRMV18NB, VFRMV24NB, VFRMV24PB specifications

The Desa VFRMV series is a sophisticated line of heating solutions known for its efficiency and modern design. The models in this series include the VFRMV24NB, VFRMV24PB, VFRMV18NB, and VFRMV18PB, each sharing a commitment to provide superior comfort and versatility in various living spaces.

One of the most notable features of the VFRMV series is its advanced heating technology. These units are equipped with a powerful burner system designed to maximize heat output while minimizing energy consumption. This makes the units not only environmentally friendly but also cost-effective, as users can enjoy warm indoor spaces without incurring high energy bills. The gas burners achieve a high thermal efficiency, ensuring that a significant amount of heat is delivered into the room promptly.

The VFRMV series is designed with customer convenience in mind. The models feature easy-to-read digital displays that allow users to adjust temperatures and settings effortlessly. These displays are intuitive, providing feedback on heating levels, operational status, and timer functions, enhancing the user experience. Furthermore, the inclusion of a remote control option allows homeowners to manage the heating from the comfort of their sitting area.

In terms of safety, the VFRMV series implements several key features. Each unit is equipped with an oxygen depletion sensor and a safety shut-off system. This ensures that the unit operates safely within its designated space, automatically shutting down if carbon monoxide levels rise or oxygen levels drop beyond safe limits. This commitment to safety provides peace of mind for households, making it a suitable choice for a wide range of environments.

Aesthetically, the VFRMV24NB and VFRMV24PB models feature a sleek design, with the "NB" models showcasing a bold black finish, while the "PB" variants offer a more classic propane-blue coloration. The smaller VFRMV18 series similarly combines elegance with functionality, ensuring that they can seamlessly blend into any home décor.

In summary, the Desa VFRMV24NB, VFRMV24PB, VFRMV18NB, and VFRMV18PB models exemplify modern heating solutions. With their advanced burner technology, user-friendly features, stringent safety measures, and stylish designs, they cater to contemporary requirements for effective indoor heating. Whether for residential or commercial use, the VFRMV series promises reliability and comfort all year round.
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