Desa VN1800ITA, VN1800D, VN2550ITA Ventilation Air From Outdoors, Ventilation Air from Outdoors

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FRESH AIR FOR COMBUSTION AND VENTILATION

Continued

8

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces.

IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermo- stat-controlled power vent. Heated air entering the attic will activate the power vent.

Ventilated

Outlet Attic

Air

Outlet
Air	To Attic
	To Attic

To

Crawl

Space

Inlet

Air

Inlet Air		Ventilated
		Crawl Space
		Crawl Space

Figure 3 - Ventilation Air from Outdoors

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Image 8

Contents OWNER’S Operation and Installation Manual What to do if YOU Smell GASContents Safety Information Combustion and Ventilation, pages 5 through Identification Local Codes Unpacking Product FeaturesProduct Fresh AIR For CombustionVentilation Producing Adequate VentilationDetermining if You Have a Confined or Unconfined Space Fresh AIR for Combustion and VentilationDetermining FRESH-AIR Flow for Heater Location Ventilation AIR Ventilation Air From Inside BuildingVentilation Air From Outdoors Ventilation Air from OutdoorsInstalling To Wall Installation ItemsCheck GAS Type Locating HeaterThermostat Sensing Bulb Models VN1800ITA and VN2550ITA OnlyLocating Thermostat Sensing Bulb Attaching Thermostat Sensing BulbInstalling Heater to Wall Mounting BracketRemoving Front Panel Of Heater 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 Pressure Testing GAS Supply Piping System Checking GASConnections 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 litExplosion may result causing property damage, personal OperatingIf you do not follow these instructions exactly, a fire or Injury or loss of lifeModels VN1800D and VN3000D LOW MED High Inspecting Burner Pilot Flame PatternBurner Flame Pattern If burner flame pattern is incorrect, as shown in FigureCleaning and Maintenance Trouble Shooting ODS/PILOT and Burner OrificeCabinet Air PassagewaysObserved Possible Remedy Problem Cause TROUBLE- ShootingTrouble Shooting See CleaningIf you smell gas Shut off gas supplyDo not try to light any appliance Ing statement atVN1800D VN3000D Technical ServiceService Publications Hints Replacement Parts AccessoriesIllustrated Parts Breakdown Model VN1800ITAParts List Model VN2550ITA Parts List Model VN1800D Control Position Label Hardware Assembly Model VN3000D Parts List Warranty Information Keep this Warranty