Desa FVMR18 AIR for Combustion Ventilation, Determining FRESH-AIR Flow for Appliance Location

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OWNER’S MANUAL

AIR FOR

COMBUSTION AND

VENTILATION

Continued

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 doorless passageways or ventilation grills between the rooms.

1.Determine the volume of the space (length x width x height).

Length x Width x Height = _________________ cu. ft. (volume of space)

Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2.Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.

_____________ (volume of space) ÷ 50 cu. ft. = (maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)

3.Add the Btu/Hr of all fuel burning appliances in the space.

Gas fireplace logs

 

_____________ Btu/Hr

Gas water heater*

 

_____________ Btu/Hr

Gas furnace

 

_____________ Btu/Hr

Vented gas heater

 

_____________ Btu/Hr

Vent-free heater

 

_____________ Btu/Hr

Other gas appliances* +

_____________ Btu/Hr

Total

=

_____________ Btu/Hr

Example:

 

 

Gas water heater

 

40,000 Btu/Hr

Gas fireplace logs +

55,000 Btu/Hr

Total

=

95,000 Btu/Hr

*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

4.Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.

_____________ Btu/Hr (maximum the space can support)

_____________ Btu/Hr (actual amount of Btu/Hr used)

Example: 51,200 Btu/Hr (maximum the space can support)

95,000 Btu/Hr (actual amount of Btu/Hr used)

The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows:

A.Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin- ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.

C.Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.

WARNING: If the area in which the appliance may be operated is smaller than that defined as an unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3 or applicable local codes.

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Contents For Use with Log Sets OWNER’S Operation and Installation ManualWhat to do if YOU Smell GAS Vented Natural GAS Logs Safety InformationON/OFF Safety VALVE/ Pilot KIT and PROPANE/LP Conversion Local Codes Unpacking Optional Product FeaturesRemote Control Ready Millivolt Safety VALVE/ Pilot KIT Remote Control AccessoriesProviding Adequate Ventilation AIR for Combustion and VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining if You Have a Confined or Unconfined Space AIR for Combustion VentilationDetermining FRESH-AIR Flow for Appliance Location Ventilation Air From Inside Ventilation AIRBuilding Ventilation Air From OutdoorsFlue Opening Specifications InstallationVenting Specifications for Installation Check GAS TypeConnecting to GAS Supply Installing Damper ClampPressure Testing Gas Supply Piping System Installation Items NeededOptional GA9000 ON/OFF Safety VALVE/PILOT KIT Assembly Hearth KIT Assembly and InstallationKit Assembly Installation and Gas ConnectionGas Control Valve with Ther- mocouple and Pilot Propane/LP Gas ConversionAdding PAN Material Testing Burner for LeaksInstalling the Grate and Logs Operating Appliance Troubleshooting Cleaning and MaintenanceTo Turn OFF GAS To Appliance Shutting Off Burner Only pilot stays litClean pilot see Cleaning and Mainte Gas leak. See Warning statement at FVMR18 FVMR24 Illustrated Parts BreakdownKEY Part Number for FVMR18 FVMR24 Description QTY Parts ListKEY Part Number for FMLR18 FMLR24 Description QTY LOG SET Models FMLR18, and FMLR24Accessories Replacement PartsInternational Warranty Information

FVMR24, FVMR18 specifications

Desa FVMR18 and FVMR24 are innovative models that stand out in the world of HVAC (Heating, Ventilation, and Air Conditioning) systems. Designed for modern living and commercial environments, these units combine efficiency, performance, and advanced technology to meet diverse climate control needs.

The FVMR18 is designed for residential spaces, featuring a compact and sleek design that easily fits into various interior layouts. Its primary strength lies in its energy efficiency, boasting an impressive SEER (Seasonal Energy Efficiency Ratio) rating. This not only reduces overall power consumption but also minimizes utility bills, aligning with eco-friendly initiatives. The FVMR24, on the other hand, caters to larger areas, including commercial buildings, offering enhanced cooling and heating capabilities.

Both models utilize inverter technology, which allows them to adjust the compressor speed based on the ambient temperature. This means the units can operate more quietly and sustainably, delivering just the right amount of heating or cooling without the drastic fluctuations typical of conventional systems. The inverter technology also contributes significantly to the longevity of the unit, preventing wear and tear associated with frequent restarts.

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In summary, Desa FVMR18 and FVMR24 models represent a blend of cutting-edge technology and user-centric features. With their efficient performance, advanced filtration, and smart capabilities, they effectively address the diverse demands of contemporary climate control, making them a valuable investment for both home and business environments.