Termination

The vent terminal should be vertical and should termi- nate outside the building at least 2 ft above the highest point of the roof that is within 10 ft. The vent cap should have a minimum clearance of 4 ft horizontally from and in no case above or below (unless a 4 ft hori- zontal distance is maintained) electric meters, gas meters, regulators and relief equipment. The distance of the vent terminal from adjacent public walkways, adjacent buildings, open windows and building open- ings must be consistent with the NFGC (U.S.) or B149 (Canada). Gas vents supported only by flashing and extended above the roof more than 5 ft should be se- curely guyed or braced to withstand snow and wind loads.

CAUTION: A listed vent cap terminal, adequately sized, must be used to evacuate the flue products from the heaters.

Common Venting System

Manifolds that connect more than one heater to a com- mon chimney must be sized to handle the combined load. Consult available guides for proper sizing of the manifold and the chimney. At no time should the area of the common vent be less than the area of the largest heater exhaust outlet.

WARNING: Vent connectors serving appliances vented by natural draft shall not be connected into any portion of mechanical draft systems operating under a positive pressure.

CAUTION: Vent connectors for natural draft venting systems must be Type B or better.

Common venting systems may be too large once an existing unit is removed. At the time of removal of an existing appliance, the following steps must be fol- lowed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation.

1.Seal any unused opening in the common venting system.

2.Visually inspect the venting system for proper size and horizontal pitch and verify there is no block- age, restriction, leakage, corrosion or other unsafe condition.

3.Insofar as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the com- mon venting system are located and other spaces of the building. Turn on clothes dryers and any ap- pliance not connected to the common vent system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, at maximum

 

Certified

 

Vertical Venting

Combustion Air

Air Inlet

Model

Venting

Vent Size

Height*

Intake Pipe

Max. Length**

 

Material

 

Min.

Max.

Material

10”

12”

 

 

 

 

 

 

 

 

 

 

 

 

992B

 

10”

 

 

 

 

 

 

 

 

 

 

 

75’

100’

1262B

 

12”

 

 

 

 

 

 

 

Galvanized Steel,

 

 

1532B

Category I

 

 

 

 

 

 

 

 

 

 

 

 

PVC,

 

 

1802B

(Type B

 

5’

25’

 

 

 

ABS,

 

 

 

Equivalent)

14”

 

 

 

 

2002B

 

 

 

 

 

 

CPVC

40’

75’

 

 

 

 

 

 

2072B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2342B

16”

*Vent lengths are based on a lateral length of 2 ft. Refer to the latest edition of the NFGC for further details. When

vertical height exceeds 25 ft, consult factory prior to installation. ** Subtract 10 ft per elbow. Max. 3 elbows.

Maximum combustion air duct length terminated at 100 equivalent ft.

Table K: Category I Vertical Venting

29

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Raypak 992B manual Termination, Common Venting System, Certified Vertical Venting Combustion Air Air Inlet Model, Height
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992B specifications

The Raypak 992B is a highly regarded commercial boiler known for its efficiency and reliability in heating applications. Designed for a range of installations, it is particularly favored in schools, hotels, and various commercial settings where dependable heating is crucial. One of the standout features of the Raypak 992B is its impressive thermal efficiency rating, often exceeding 90%. This efficiency translates into lower energy costs and reduced environmental impact, making it a smart choice for eco-conscious businesses.

The Raypak 992B comes equipped with advanced technologies that enhance performance and ease of use. Among these technologies is the high-precision digital control system, which allows for accurate temperature regulation and monitoring. This feature ensures optimal performance and minimizes energy waste, further contributing to the unit's cost-effectiveness. The boiler also utilizes a modulating burner system, enabling it to adjust flame size based on real-time heating demands. This adaptability not only enhances efficiency but also improves overall comfort within a facility.

Another significant characteristic of the Raypak 992B is its robust construction. Built with durable materials designed to withstand demanding operating conditions, this boiler is engineered for long-lasting performance. Its compact design is an added benefit, facilitating installation in areas with limited space. The unit is also equipped with a stainless steel heat exchanger, which provides superior resistance to corrosion and enhances heat transfer efficiency.

Safety features are also paramount in the design of the Raypak 992B. The boiler includes multiple safety controls and alarms to prevent overheating and maintain safe operating conditions. This diligence in safety ensures peace of mind for operators and reduces the risk of unexpected downtime.

In summary, the Raypak 992B stands out as a top choice for commercial heating solutions, combining high efficiency, advanced technology, and rugged construction. Its features cater to a wide range of heating needs while prioritizing safety and economy. With its impressive performance capabilities, the Raypak 992B continues to be a reliable partner for facilities seeking optimal heating solutions.
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