Table 1ÐRoom Large In Comparison With Boiler

 

 

 

 

 

 

 

 

 

 

MINIMUM ROOM

BOILER SIZE

 

BOILER VOLUME

 

VOLUME REQUIRED

 

 

TO BE LARGE

(SECTIONS)

 

(CU FT)

 

 

 

ROOM

 

 

 

 

 

 

 

 

(CU FT)*

2

 

4.3

 

68.7

3

 

5.6

 

89.0

4

 

6.8

 

109.3

5

 

8.1

 

129.5

6

 

9.4

 

149.8

7

 

10.6

 

170.1

 

 

 

 

 

* For room with single boiler only.

Table 2ÐMinimum Clearances From Combustible Materials and For Servicing

 

ALCOVE OR ROOM

ROOM LARGE

 

NOT LARGE

PART OF BOILER

IN COMPARISON

IN COMPARISON

 

WITH BOILER (IN.)

 

WITH BOILER (IN.)

 

 

Top

6

6

Rear

6

6

Control Side

8

6

Opposite Control Side

6

6

Front

18

18

Flue/Vent Connector

6

6

Boiler Piping

1

1

7.Table 2 shows minimum clearances from combustible materials.

8.Equipment shall be installed in a location in which the facilities for ventilation permit satisfactory combustion of gas, proper venting, and maintenance of ambient temperature at safe limits under normal conditions of use. Equipment shall be located so as not to interfere with proper circulation of air. When normal infiltration does not provide necessary air, outside air shall be introduced as described in Fresh Air for Combustion section.

9.Advise owner to keep air passages free of obstructions. Ventilation and combustion air must enter boiler room without restrictions.

10.The boiler shall be installed such that the automatic gas ignition system components are protected from water (dripping, spraying, rain , etc.) during appliance operation and service (condensate trap, control replacement, etc.).

FRESH AIR FOR COMBUSTION

Provision for combustion and ventilation air must be in accordance with Section 5.3 of NFGC, Air for Combustion and Ventilation, or applicable provisions of local building codes.

Canadian installations must be installed in accordance with NSCNGPIC and all authorities having jurisdiction.

WARNING: Be sure to provide enough fresh air for combustion. Enough air ensures proper combustion and ASSURES THAT NO HAZARD WILL DEVELOP DUE TO LACK OF OXYGEN. Failure to follow this warning can cause a fire, personal injury, or death.

You must provide for enough fresh air to assure proper combustion. The fire in the boiler uses oxygen. It must have a continuous supply. The air in a house contains only enough oxygen to supply the burner for a short time. Outside air must enter the house to replace the oxygen used by the burner. Study the following examples to determine your fresh air requirements.

CAUTION: Air for combustion must not be contaminated by halogen compounds, which include fluoride, chloride, bromide, and iodide. These elements are found in aerosol sprays, detergents, bleaches, cleaning solvents, salts, air fresheners, and other household products. Excessive exposure to contaminated combustion air will result in safety and performances related problems.

CAUTION: If a fireplace or a kitchen or bathroom exhaust fan is used, an outside air intake should be installed. These devices rob the boiler and water heater of combustion air.

PROCEDURE 1ÐBOILER LOCATED IN UNCONFINED SPACE

EXAMPLE 1:

An unconfined space is defined as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour of the total input rating of all appliances installed in that space.

If your boiler is in an open area (unpartitioned basement) in a conventional house, the air that leaks through the cracks around doors and windows will usually be adequate to provide air for combustion. The doors should not fit tightly. Do not caulk the cracks around the windows.

Ð5Ð

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National Products BW3, Series B instruction manual → ÐRoom Large In Comparison With Boiler, →FRESH AIR for Combustion, Ð5Ð

BW3, Series B specifications

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