Desa SBJ18VNA, SMA18VNA, SMA24VPA, SBJ24VPA Ventilation AIR, Ventilation Air From Inside Building

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AIR FOR COMBUSTION

AND VENTILATION

Continued

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 sup- plied 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 appliance

_________Btu/Hr

Gas water appliance*

_________Btu/Hr

Gas furnace

_________Btu/Hr

Vented gas appliance

_________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 combustion air from the outdoors and vents to the outdoors.

Example:

 

 

 

Gas water appliance

 

40,000

Btu/Hr

Vent-free appliance

+

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 previous 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.

B.Vent room directly to the outdoors. See Ven- tilation Air From Outdoors, page 8.

C.Install a lower Btu/Hr appliance, 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:Iftheareainwhich 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, ANSI Z223.1/NFPA54 Section 5.3 or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining un- confined space. When ventilating to an adjoining unconfined space, you must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2 on page 8). You can also remove door into adjoining room (see option 3, Figure 2). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for re- quired size of ventilation grills or ducts.

114744-01C

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Contents SMA24VPA What to do if YOU Smell GASTable of Contents Safety Information Provide adequate clearances around air openings Local Codes Product IdentificationUnpacking Providing Adequate Ventilation AIR for Combustion VentilationDetermining FRESH-AIR Flow for Appliance Location Ventilation Air From Inside Building Ventilation AIRVentilation Air From Outdoors AIR for Combustion Ventilation InstallationCheck GAS Type Installation and Clearances for VENT-FREE OperationMinimum Noncombustible Material Clearances InstallationFloor Clearances Mantel ClearancesTo combustibles see Figure Masonry Manufactured FireplaceFireplace Installing Damper Clamp Accessory for Vented OperationInstalling Remote Control Accessory BracketControl cover kit optional see Accessories, Installing Heater AssemblyConnecting to GAS Supply Installation Items NeededPropane/LP From Checking GAS ConnectionsNatural From Turn off heater Pressure Testing Heater Gas ConnectionsTest Pressures In Excess Of 1/2 Psig 3.5 kPa Test Pressures Equal To or Less Than 1/2 Psig 3.5 kPaOperating Heater For Your Safety Read Before LightingLighting Instructions Shutting Off Heater Control Knob SwitchTo Turn OFF GAS To Appliance Propane/LP NaturalThermostat Series Model HRC200 Manual Lighting ProcedureOptional HAND-HELD Remote Operation ON/OFF Series Model HRC100Auto Shutoff Feature Manual ModeAuto Thermostatic Mode Safety FeaturesPilot Flame Pattern Wiring DiagramWhen Using Remote Inspecting BurnerBurner Injector Holder and Pilot AIR Inlet Hole Cleaning MaintenancePropane/LP Observed Problem Possible Cause Remedy TroubleshootingLow gas pressure Assembly Out when control knob is reSafety interlock system has Clean ODS/pilot seeGas regulator defective Or shut off Qualified service personBattery is not installed. Bat Remote control Tery power is lowMent at top Technical Service SpecificationsReplacement Parts Service HintsAccessories Illustrated Parts Breakdown Parts List Models SMA24VNA Shown, SMA24VPA, SBJ24VNA and SBJ24VPA BJ24VNAS Keep this Warranty Warranty InformationLimited Warranty VENT-FREE GAS LOG Heaters