Weil-McLain UO-3 CV, UO-5 CV, UO-4 CV manual Check/Adjust ‘Z’ Dimension ‘F’ heads, Burner Dimensions

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Prepare the Burner

Figure 4. Check/Adjust ‘Z’ Dimension for ‘F’ Heads

1-1/8”

1-3/8”

!WARNING

Adjust the ‘Z’ dimen- sion to the required specif cation.

Incorrect Adjustments could cause combus- tion problems, carbon deposition from flame impingement, heavy smoke generation and fire hazard.

yMake all adjustments exactly as outlined in the following information.

Check/Adjust ‘Z’ Dimension - ‘F’ heads

1.The important ‘Z’ dimension is the distance from the face of the nozzle to the flat face of the head (or heat shield, if applicable). This dis- tance for F heads is 1-⅛” (1-⅜” if the air tube has a heat shield). The “Z” dimension is factory set for burners shipped with the air tube in- stalled. Even if factory set, verify that the “Z” dimension has not been changed.

2.Use the following procedure to adjust the “Z” dimension, if it is not

correct:

yTurn off power to the burner.

yDisconnect the oil connector tube from the nozzle line

ySee above figure. Loosen the splined nut from the nozzle line. Loosen the hex head screw securing the escutcheon plate to the burner housing.

yPlace the end of a ruler at the face of the nozzle and, using a straight edge across the head, measure the distance to the face of the head. A Beckett T501 gauge may also be used.

ySlide the nozzle line forward or back until this dimension for F heads is 1-⅛” (1-⅜” to the face of the heat shield, if applicable).

yTighten the hex head screw to secure the escutcheon plate to the burner chassis. Then tighten the splined nut and attach the oil con- nector tube.

3.Recheck the “Z” dimension periodically when servicing to ensure the escutcheon plate has not been moved. You will need to reset the “Z” dimension if you replace the air tube or nozzle line assembly. The Beckett Z gauge (part number Z-2000) is available to permit checking the F head “Z” dimension without removing the burner from the appli- ance.

Burner Dimensions

 

For usable length A (inches)

Dimension (inches)

F Head

L1

L2

V1

 

 

Head

Head

Head

H (nozzle to head), +1/32

N/A

1/4

7/32

1/4

L (Total tube length)

A+1/2

A+1/2

A+1/2

A+1/2

R (electrode length), + 1/4

A+2-1/4

A+1-1/8

A+1-1/8

A+1-1/8

S (adapter to static plate), +

(Note 1)

1-3/8

1-3/8

1-3/8

1/16

 

 

 

 

Q (nozzle line length),

A+ 15/16

A+ 3/16

A+ 3/16

A+ 3/16

Z (F head-no heat shield)

1-1/8

N/A

N/A

N/A

(F head-with heat shield)

1-3/8

N/A

N/A

N/A

Z (L1 head w/straight

N/A

1-3/8

N/A

N/A

shroud) (L1/L2/V1 head

N/A

1-3/4

1-3/4

1-3/4

w/conic shroud)

 

 

 

 

Note 1: 1-3/8for dimension A less than 4”; 1-5/8 for dimension A from 4” through 4-1/2“, 2-13/32for dimension A greater than 4-1/2”.

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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 Information To Be Used Only By Qualif ed Service Technicians Table of ContentsIndicates a hazardous situ FeatureHazard Definitions General InformationWeekly General Information To the OwnerBurner Specif cations Air Tube Combination ATC codes General SpecificationsInspect Chimney or Direct Vent System Tion Hazard Inspect/Prepare Installation SiteNozzle Chamber DimensionsClearances to burner and appliance Combustion chamber Burner retrof t- tingInspect/Prepare Installation Site Prepare the Burner Mount burner on appliance Prepare the BurnerBurner Dimensions Check/Adjust ‘Z’ Dimension ‘F’ headsCheck/Adjust ‘Z’ Dimension L1 & L2 Heads Fuel Line Valves and Filter Installing the Oil Tank and Supply SystemFrozen Plumbing Water Damage Hazard Wire burnerBurner installed at jobsite Special wiring required with covered burnersFire or Explosion Hazard WiringFeatures Burner Controls GeniSys Model 7505 ControlBurner Controls Light Color On Continuously Flashing Reset Button OperationControl System Features Typical Burner WiringHot Gas Puff-Back Heavy Smoke Hazard Cad Cell Resistance IndicatorResetting From Restricted or Hard Lockout Start up burner/set combustionSet combustion with instruments Check Safety FeaturesStartup / Checkout Startup/CheckoutShutting the Burner Off Perform regular maintenanceReplace the blower wheel Blower wheel assemblyPage Description Warranty

UO-3 CV, UO-4 CV, UO-5 CV specifications

Weil-McLain is a well-respected name in the heating industry, recognized for its high-quality and efficient boiler systems. Among its notable offerings are the UO-3 CV, UO-4 CV, and UO-5 CV models, all of which showcase advanced engineering and innovative technology tailored for residential and commercial applications.

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