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”.

Page 10

6104BAFG R06

Page 11
Image 11
Weil-McLain UO-3 CV, UO-5 CV, UO-4 CV manual Check/Adjust ‘Z’ Dimension ‘F’ heads, Burner Dimensions

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.

The UO-3 CV boiler is designed for mid-sized heating requirements, boasting a strong output capacity that balances efficiency with performance. It features a compact size, suitable for smaller installations, without sacrificing power. The boiler is equipped with a durable cast iron heat exchanger that provides excellent thermal efficiency and longevity, ensuring reliable operation over the years. Its easy access for maintenance also makes it a popular choice among HVAC professionals.

Moving to the UO-4 CV model, this boiler builds on the success of the UO-3 with an increased output capacity, making it ideal for larger residential or light commercial spaces. The UO-4 CV incorporates Weil-McLain’s advanced combustion technology, which optimizes fuel use and significantly reduces emissions. This model maintains a compact design while enhancing overall performance through improved heat transfer and reduced standby losses. The UO-4 CV's user-friendly features, including easy-to-use controls and a diagnostic system, streamline operational efficiency.

The UO-5 CV further solidifies Weil-McLain's commitment to excellence with its highest output among the three. This boiler is particularly suited for extensive heating demands, making it popular among larger commercial installations. The UO-5 CV also employs cutting-edge technology, including advanced controls for precise temperature regulation and an efficient system designed to minimize energy consumption. Its robust construction ensures it can handle heavy use while remaining reliable, even in challenging environments.

In summary, the Weil-McLain UO series, including the UO-3 CV, UO-4 CV, and UO-5 CV, represents a perfect blend of efficiency, innovation, and reliability. All models utilize durable materials, advanced engineering, and state-of-the-art technologies that define Weil-McLain's reputation for quality in hydronic heating solutions. Whether for residential or commercial applications, these boilers serve as dependable sources of heat, catering to various needs while maintaining energy efficiency and lower emissions.