Desa VML27PR Determining FRESH-AIR Flow for Heater Location, Confined and Unconfined Space

Page 5

AIR FOR COMBUSTION AND VENTILATION

Providing Adequate Ventilation (Cont.) Determining Fresh-Air Flow For Heater Location

5

AIR FOR COMBUSTION AND VENTILATION

Continued

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 additional 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 Heater Location.

Confined and Unconfined Space

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose volume 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 doorless passageways or ventilation grills between them.

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Uncon- fined 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 open- ings, 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

Gas furnace

 

_____________ Btu/Hr

Vented gas heater

 

_____________ Btu/Hr

Gas fireplace logs

 

_____________ Btu/Hr

Other gas appliances* +

_____________ Btu/Hr

Total

=

_____________ Btu/Hr

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

Example:

Gas water heater

 

40,000

 

_____________ Btu/Hr

Vent-free heater

+

33,000

_____________ Btu/Hr

Total

=

73,000

_____________ Btu/Hr

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) 73,000 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 6.

B.Vent room directly to the outdoors. See Ventilation Air From Out- doors, page 6.

C.Install a lower Btu/Hr heater, if lower Btu/Hr size makes room un- confined.

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 uncon- fined space or if the building is of unusually tight construction, provide adequate combustion and ven- tilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Sec- tion 5.3 or applicable local codes.

For more information, visit www.desatech.com

111115-01D

Image 5
Contents FLAME-MAX Remote Control Ready Model Patent PendingVML27NR VML27PR What to do if YOU Smell GASSafety Information Table of ContentsLocal Codes Product IdentificationRemote Control Accessories Product FeaturesUnpacking AIR for Combustion and VentilationDetermining if You Have a Confined or Uncon- fined Space Determining FRESH-AIR Flow for Heater LocationConfined and Unconfined Space Ventilation AIR InstallationVentilation Air From Inside Building Ventilation Air From OutdoorsMinimum Fireplace Clearance to Combustible Materials Installation and ClearancesLOG Sizing Requirements Check GAS TypeMantel Clearances Determining Minimum Mantel Clearance When using a HoodMinimum Noncombustible Material Clearances Determining Minimum Mantel ClearanceFloor Clearances Installing Damper Clamp Accessory for Vented OperationInstalling Optional Remote Control Accessories Installing Heater Base AssemblyInstallation Items Needed Installing Remote ReceiverInstalling 9-Volt Battery in Receiver Connecting to GAS SupplyChecking GAS Connections Pressure Testing Gas Supply Piping SystemProperty damage or personal injury Installing LogsPressure Testing Heater Gas Connections Operating Heater For Your Safety Read Before LightingControl Knob and Ignitor Button Location Lighting InstructionsTo Turn OFF GAS To Appliance Manual Lighting ProcedureOptional HAND-HELD Remote Operation ON/OFF Series Model GhrcbPilot Flame Pattern Inspecting BurnersBurner Primary AIR Holes Main BurnerWiring Diagram Cleaning MaintenanceCleaning Burner Injector Holder and Pilot AIR Inlet Hole LogsObserved Problem Possible Cause TroubleshootingObserved Problem Possible Cause Remedy Top Gas leak. See Warning statement atModels VML27PR VML27NR Illustrated Parts BreakdownKEY Part Number VML27PR VML27NR Description QTY Parts ListService Hints SpecificationsTechnical Service Replacement Parts Parts Under WarrantyOwners Registration Form Postage Required WALL-MOUNT ON/OFF Switch GWMS2 WALL-MOUNT Thermostat Switch GWMT1Cleaning KIT GCK Receiver and HAND-HELD Remote CON Trol KIT GhrcbWarranty Information

VML27PR specifications

Desa VML27PR is a cutting-edge development that represents a significant leap forward in efficient living and sustainable technology. This modern residential complex is designed with both aesthetics and functionality in mind, making it a prime choice for contemporary urban dwellers.

One of the standout features of Desa VML27PR is its commitment to energy efficiency. The buildings are equipped with solar panels that harness renewable energy, significantly reducing reliance on non-renewable power sources. This integration not only lowers utility bills for residents but also contributes to a lower carbon footprint, aligning with global sustainable development goals.

The architecture of Desa VML27PR is marked by its contemporary design, featuring open floor plans and large windows that maximize natural light and ventilation. The use of eco-friendly construction materials further enhances the sustainability aspect, ensuring that the development minimizes its impact on the environment while providing a comfortable living space.

Safety and security are of paramount importance in Desa VML27PR. The complex is equipped with state-of-the-art security systems, including video surveillance and controlled access points, giving residents peace of mind. Additionally, the premises are well-lit and feature landscaped green spaces, promoting a sense of community while ensuring a safe environment for families.

Another significant characteristic of Desa VML27PR is its emphasis on smart technology integration. Homes are equipped with smart appliances and systems that allow residents to control lighting, heating, and security from their mobile devices. This not only enhances convenience but also promotes energy savings by enabling users to monitor and manage their usage effectively.

Desa VML27PR also boasts a variety of communal facilities designed to foster community engagement. These include recreational areas, fitness centers, and coworking spaces that encourage interaction among residents, making it an ideal place for those seeking a vibrant social life.

In conclusion, Desa VML27PR exemplifies the future of urban living, combining sustainability, modern design, advanced technology, and community-focused amenities. It stands as a model for future residential developments, showcasing how contemporary living can harmoniously coexist with environmental responsibility and community engagement. Whether seeking a home for a growing family or a sophisticated living space for professionals, Desa VML27PR is equipped to meet diverse needs, making it a premier choice in today’s real estate market.