Desa VN2550IT, VN1800IT, VN1800C, VN3000C Fresh AIR for Combustion and Ventilation

Page 6

FRESH AIR FOR COMBUSTION AND VENTILATION

Continued

6

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

 

40,000

BTU/Hr

Vent-free heater

+

18,000

BTU/Hr

Total

=

 

 

BTU/Hr

58,000

*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)

58,000

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.

WARNING

WARNING ICON

G 001

You must provide additional ventilation air in a confined space.

100750

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Contents OWNER’S Operation and Installation Manual What to do if YOU Smell GASContents Safety Information Combustion and Ventilation, pages 5 through Piezo Ignition System Local Codes Unpacking Product FeaturesSafety Device Thermostatic Heat ControlVentilation Fresh AIR ForCombustion Producing 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 Ventilation Air From OutdoorsCheck GAS Type Installing To WallInstallation Items Locating HeaterLocating Thermostat Sensing Bulb Thermostat Sensing BulbModels VN1800IT and VN2550IT Only Attaching Thermostat Sensing BulbRemoving Front Panel Of Heater Installing Heater to WallMounting Bracket Methods For Attaching Mounting Bracket To WallMarking Screw Locations Attaching Mounting Bracket To WallInstalling Bottom Mounting Screws Placing Heater On Mounting BracketConnecting to GAS Supply Connections Pressure Testing GAS Supply Piping SystemChecking GAS Servicing. Correct all leaks at oncePressure Testing Heater GAS Connections Checking GAS ConnectionsOperating Heater Operating Heater Lighting InstructionsHeater To Select Heating LevelShutting Off Heater Shutting Off Burner Only pilot stays litOperating If you do not follow these instructions exactly, a fire orModels VN1800C and VN3000C LOW MED High Inspecting Burner Pilot Flame PatternBurner Flame Pattern Shows a correct burner flame pattern. shows an incorrectCabinet Cleaning and Maintenance Trouble ShootingODS/PILOT and Burner Orifice Air PassagewaysObserved Possible Remedy Problem Cause Trouble Shooting See CleaningDo not try to light any appliance If you smell gasShut off gas supply Ing statement atVN1800IT VN2550IT Technical ServiceService Publications Hints VN1800C VN3000CReplacement Parts AccessoriesIllustrated Parts Breakdown Model VN1800ITParts List Model VN2550IT Model VN2550IT Model VN1800C Parts List Model VN3000C Parts List Warranty Information Keep this Warranty

VN1800C, VN3000C, VN1800IT, VN2550IT specifications

Desa's VN series includes a range of advanced acoustic instruments designed for professional musicians and enthusiasts alike. The VN1800C, VN1800IT, VN3000C, and VN2550IT models each boast unique features and characteristics that cater to various playing styles and performance needs.

The VN1800C is a classical guitar that emphasizes warmth and resonance. This model is crafted from high-quality materials, including a solid cedar top that delivers rich sound and a delightful playability experience. The back and sides are constructed from mahogany, contributing to its tonal richness and sturdy build. The VN1800C also features a traditional Spanish neck profile, which facilitates comfortable finger placement, especially for intricate fingerstyle playing.

Moving on to the VN1800IT, this instrument is tailored for those who appreciate innovative design in combination with traditional craftsmanship. It features an integrated pickup system that allows for amplification without compromising the authentic acoustic sound. The VN1800IT is designed with an elegant cutaway, providing easier access to higher frets, making it an excellent choice for advanced players looking for versatility in their performance.

The VN3000C is a larger-bodied guitar that provides an expansive sound with impressive projection. This model is famous for its powerful bass response, making it ideal for solo performances and ensemble playing. Its solid spruce top enhances volume while the rosewood back and sides give it a bright, crisp tone. The VN3000C is also equipped with advanced bracing patterns that improve resonance and sustain, ensuring that every note rings out clearly.

Finally, the VN2550IT combines the features of an acoustic guitar with modern innovation. This model offers an adjustable truss rod for optimal neck stability, which is vital for maintaining playability under different environmental conditions. Like the VN1800IT, the VN2550IT also includes a high-quality pickup system, making it perfect for live performances. Its stylish design and quality craftsmanship ensure that it stands out visually as well as acoustically.

Overall, the Desa VN series offers a variety of choices to suit different musical tastes and performance requirements. Each model blends traditional acoustic qualities with modern technologies, making them must-have instruments for players at all levels.
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