Desa CGN6L, CGN10L installation manual Fresh AIR for Combustion and Ventilation

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FRESH AIR FOR COMBUSTION AND VENTILATION

Continued

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Unconfined Space

Use this worksheet 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.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.

Vent-free heater

 

___________________ Btu/Hr

Gas water heater*

 

___________________ Btu/Hr

Gas furnace

 

 

___________________ Btu/Hr

Vented gas heater

 

___________________ Btu/Hr

Gas fireplace logs

 

___________________ Btu/Hr

Other gas appliances*

+ ___________________ Btu/Hr

Total

= ___________________ Btu/Hr

Example: Gas water heater

 

44,000

Btu/Hr

Vent-free heater

+

10,000

Btu/Hr

Total

=

 

 

Btu/Hr

54,000

*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)

54,000

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 adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 8.

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.

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Contents OWNER’S Operation and Installation Manual What to do if YOU Smell GASContents Safety Information001 Product Identification Local Codes Unpacking Product FeaturesSafety Device Piezo Ignition SystemVentilation Fresh AIR ForCombustion Providing Adequate VentilationFresh AIR for Combustion and Ventilation Determining FRESH-AIR Flow for Heater LocationDetermining if You Have a Confined or Unconfined Space Ventilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Ventilation Air from OutdoorsCheck GAS Type Installing to WallInstallation Items Locating HeaterInstalling Heater to Wall Marking Screw LocationsInstalling Two Mounting Screws Folding AnchorInstalling to Wall Connecting to GAS Supply To GAS Supply ConnectingPressure Testing GAS Supply Piping System Checking GASPressure Testing Heater GAS Connections CheckingFor Your Safety Read Before Lighting Operating HeaterHeater OperatingShutting Off Heater Operating Heater Inspecting BurnerPilot Flame Pattern Shutting Off Burner Only pilot stays litBurner Flame Pattern Model CGN6 will be lower due to lower input ratingTrouble Shooting CleaningMaintenance ODS/PILOT and Burner OrificeSee Cleaning TROUBLE- ShootingObserved Possible Remedy Problem Cause Do not try to light any appliance If you smell gasShut off gas supply Ing statement atHints ServiceTechnical PartsService Publications Accessory CentralsValve GA5010 CGN10L CGN6L Parts List KEY Part Number for Description QTY CGN6L CGN10LWarranty Information Keep this Warranty