Desa FSVYD18P AIR for Combustion Ventilation, Determining FRESH-AIR Flow for Heater Location

Page 5

OWNER’S MANUAL

AIR FOR

COMBUSTION AND

VENTILATION

Continued

DETERMINING FRESH-AIR FLOW FOR HEATER 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 heater 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.Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.

_________________ (volume of space) x 20 = (maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)

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

Vent-free heater

____________________ Btu/Hr

 

 

 

 

Gas water heater*

____________________ Btu/Hr

Example:

 

 

 

Gas furnace

____________________ Btu/Hr

 

 

 

Gas water heater

 

40,000

Btu/Hr

Vented gas heater

____________________ Btu/Hr

 

Vent-free heater

+

30,000

Btu/Hr

Gas fireplace logs

____________________ Btu/Hr

 

 

 

 

Total

=

70,000

Btu/Hr

Other gas appliances*

+ ___________________ Btu/Hr

 

 

 

 

Total

= ___________________ 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) 70,000 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 heater 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, ANSI Z223.1/NFPA 54, Section 5.3 or applicable local codes.

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Contents What to do if YOU Smell GAS VENT-FREE PROPANE/LP GAS Stove HeaterDesa International VENT-FREE PROPANE/LP GAS Stove Heater Safety InformationLocal Codes Product FeaturesProduct Identification Providing 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 Heater Location Ventilation Air From Inside Ventilation AIRBuilding Ventilation Air From OutdoorsCheck GAS Type InstallationClearances to Combustibles Vent-Free Operation OnlyStove bottom Stove Cavity AssemblySheraton Models Amity and Townsend ModelsAttaching Stove Door Appearance May Vary Depending on Model Fastening Heater Base to Stove Drop Bottom Installing GAS LOG Heater Into StoveInstallation Items Needed Connecting to GAS SupplyChecking GAS Connections Pressure Testing Gas Supply Piping SystemPressure Testing Heater Gas Connections Operating Heater For Your Safety Read Before LightingLighting Instructions SVYD18PR and FSVYD18PR Remote-Ready ModelsOptional Remote Operation Manual Lighting ProcedureTo Turn OFF GAS To Appliance SVYD18P and FSVYD18P Manual-Variable Control Models Variable Control OperationPilot Flame Pattern Inspecting BurnersBurner Primary AIR Holes Main BurnerSpecifications Cleaning and MaintenanceTechnical Service Cleaning Burner Injector Holder and Pilot AIR Inlet HoleObserved Problem Possible Cause Remedy TroubleshootingMaintenance, Top SVYD18PR FSVYD18PR Illustrated Parts BreakdownKEY Part Number Description QTY Parts ListSVYD18P FSVYD18P KEY Part Description QTY Designation Amity SCIVF* Series PSCIVF* SeriesIndicates Color Suffix Indicates Color Suffix Designation Sheraton NSCIVF* Series Parts List Series TownsendFC* and PFC* Series *Indicates Color Suffix Designation Wiring Diagram Replacement PartsService Hints Parts Under WarrantyAccessories Warranty Information

FSVYD18P specifications

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