Weil-McLain Essential Manual for UO-3 Burner: Combustion Air and Ventilation Guidelines
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Combustion air supply

 

 

Adequate Combustion

 

! WARNING

 

and Ventilation Air Supply

 

 

Required

Failure to provide adequate air supply could seriously affect the burner performance and re- sult in damage to the equipment, asphyxiation, explosion or fire hazards.

yThe burner cannot properly burn the fuel if it is not supplied with a reliable combustion air source.

yFollow the guidelines in the latest editions of the NFPA 31 and CSA-B139 regarding providing ad- equate air for combustion and ventilation.

Appliance located in confined space

The confined space should have two (2) permanent openings: one near the top of the enclosure and one near the bottom of the enclosure. Each open- ing shall have a free area of not less than (1) one square inch per 1,000 BTU’s per hour of the total input rating of all appliances within the enclosure. The openings shall have free access to the build- ing interior, which should have adequate infiltration from the outside.

Exhaust fans and other air-using devices

Size air openings large enough to allow for all air- using devices in addition to the minimum area re- quired for combustion air. If there is any possibility of the equipment room developing negative pres- sure (because of exhaust fans or clothes dryers, for example), either pipe combustion air directly to the burner or provide a sealed enclosure for the burner and supply it with its own combustion air supply.

Direct air supply and sidewall venting

ySome AFG burners are equipped with combus- tion air boots to allow use of outside air for com- bustion.

yWhen sidewall venting appliances, carefully fol- low appliance and power venter instructions for installation and wiring.

!WARNING Follow the Outside Air Kit Instructions Exactly

Failure to comply could result in impaired com- bustion, appliance soot-up, puffback of smoke, and fire or asphyxiation hazards.

yDo not attempt to install outside air piping to the burner without using the outside air kit and instructions.

Inspect/Prepare Installation Site

Outside air kit applications

Refer to separate instruction sheet supplied with AF/AFG outside air kit for installation. This optional kit allows combustion air to be piped directly to the burner (Beckett part number 51747).

Clearances to burner and appliance

yProvide space around burner and appliance for easy service and maintenance.

yCheck minimum clearances against those shown by the appliance manufacturer and by applicable building codes.

!WARNING Protect Steel Combustion Chamber From Burnout

Failure to comply could result in damage to the heating equipment and result in fire or asphyxi- ation hazards.

yWhen retrofitting appliances that have unlined stainless steel combustion chambers, protect the chamber by lining the inside surfaces with a ceramic fiber blanket, such as a wet-pac or other suitable refractory material.

ySome steel chambers may not require liners because the appliance was designed and tested for use with flame retention burners. Refer to the manufacturer’s instructions.

Combustion chamber — Burner retrof t- ting

Verify that the appliance combustion chamber pro- vides at least the minimum dimensions given in Table 3.

Table 3. Chamber Dimensions

Chamber Dimensions (inches)

Firing Rate

Round

Rectangular

Height

Floor to

(GPH)

I.D.

 

 

 

nozzle

Width

Length

 

 

 

 

 

0.50

8

7

8

12

5-6

0.75

9

8

9

12

5-6

1.00

10

9

10

12.5

5-6

1.25

11

10

11

12.5

5-6

1.50

12

11

12

13

6-7

2.00

14

12

15

13.5

6-7

2.50

16

13

17

14

7-8

3.00

18

14

18

15

7-8

6104BAFG R06

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Contents R02 01/09 To the Homeowner or Equipment Owner To the Professional, Qualif ed Installer or Service AgencyPotential for Fire, Smoke and Asphyxiation Hazards Table of Contents Information To Be Used Only By Qualif ed Service TechniciansFeature Hazard DefinitionsGeneral Information Indicates a hazardous situWeekly General Information To the OwnerBurner Specif cations General Specifications Air Tube Combination ATC codesInspect/Prepare Installation Site Inspect Chimney or Direct Vent System Tion HazardChamber Dimensions Clearances to burner and applianceCombustion chamber Burner retrof t- ting NozzleInspect/Prepare Installation Site Prepare the Burner Prepare the Burner Mount burner on applianceCheck/Adjust ‘Z’ Dimension ‘F’ heads Burner DimensionsCheck/Adjust ‘Z’ Dimension L1 & L2 Heads Installing the Oil Tank and Supply System Fuel Line Valves and FilterWire burner Burner installed at jobsiteSpecial wiring required with covered burners Frozen Plumbing Water Damage HazardWiring FeaturesBurner Controls GeniSys Model 7505 Control Fire or Explosion HazardBurner Controls Reset Button Operation Light Color On Continuously FlashingTypical Burner Wiring Control System FeaturesCad Cell Resistance Indicator Resetting From Restricted or Hard LockoutStart up burner/set combustion Hot Gas Puff-Back Heavy Smoke HazardCheck Safety Features Startup / CheckoutStartup/Checkout Set combustion with instrumentsPerform regular maintenance Shutting the Burner OffBlower wheel assembly Replace the blower wheelPage Description Warranty

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