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

Page 7

Page 8
Image 8
Weil-McLain UO-3 CV manual Clearances to burner and appliance, Combustion chamber Burner retrof t- ting, Chamber 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.