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SERIES 28A BOILER INSTALLATION AND OPERATION INSTRUCTIONS

All Air From Inside The Building

If the boiler is to be located in a confined space minimum clearances of 24 in, 610 mm must be maintained between the boiler and any adjacent construction. When installed in a confined space, two permanent openings communicating with an additional room(s) are required. The combined volume of these spaces must have sufficient volume to meet the criteria for an unconfined space. The total air requirements of all fuel burning equipment or any type of exhaust fan must be considered when making this determination.

Each opening must have a minimum free area of 1 in2/ 1000 Btu/hr, 140 in2/GPH, 2200 mm2/kW based on the total input rating of ALL fuel burning equipment in the confined area. Each opening must be no less than 100 in2, 64,516 mm2 in size. The upper opening must be within 12 in, 305 mm of, but not less than 3 in, 76 mm from, the top of the enclosure.

The bottom opening must be within 12 in, 305 mm of, but not less than 3 in, 76 mm from, the bottom of the enclosure.

All Air From Outside The Building

When installed in a confined space Two permanent openings communicating directly with, or by ducts to, the outdoors or spaces that freely communicate with the outdoors must be present. The upper opening must be within 12 in, 305 mm of, but not less than 3 in, 76 mm from, the top of the enclosure. The bottom opening must be within 12 in, 305 mm of, but not less than 3 in, 76 mm from, the bottom of the enclosure.

Where directly communicating with the outdoors or communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 in2/ 4000 Btu/hr, 35 in2/GPH, 550 mm2/kW of the total input rating of all of the equipment in the enclosure.

Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 in2/2000 Btu/hr, 70 in2/GPH, 1100 mm2/ kW of the total input rating of all of the equipment in the enclosure. When ducts are used, they must have the same cross-sectional area as the free area of the opening to which they connect. When calculating the free area necessary to meet the make-up air requirements of the enclosure, consideration must be given to the blockage effects of louvers, grills and screens. Screens must have a minimum mesh size of 1/4 in, 6.4mm. If the free area through a louver or grill is not known the louver or grill should be sized per Table 1.

Table 1- Make-up Air Louver Sizing

Required Cross Sectional Area (in2)

 

 

Metal

Wooden

Input

1/4" Wire

Louvers

Louvers

(MBH)

Screen

75% Free Area

25% Free Area

1000

250

333

1000

1200

300

400

1200

1400

350

467

1400

1600

400

533

1600

1800

450

600

1800

2000

500

667

2000

2200

550

733

2200

2400

600

800

2400

2600

650

867

2600

2800

700

934

2800

3000

750

1000

3000

3200

800

1066

3200

3400

850

1134

3400

3600

900

1200

3600

3800

950

1267

3800

4000

1000

1334

4000

4200

1050

1400

4200

4400

1100

1467

4400

4600

1150

1533

4600

4800

1200

1600

4800

CHIMNEY & VENT PIPE

CONNECTIONS

WARNING: The vent installation must be in accordance with Part 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1/ NFPA 54-latest revision, the ASHRAE Equipment Handbook on Venting or applicable provisions of the local building codes. Canadian installations must comply with CAN/CGA B149.1 or .2 Installation Code. Improper venting of this boiler can result in excessive levels of carbon monoxide which can result in severe personal injury or death!

CAUTION: The products of combustion from a 28A must be safely vented to the outdoors while ensuring that the flue gasses do not cool prematurely. It’s critical that the chimney system be properly designed to handle the flue gases. An oversized or uninsulated chimney can cause the moisture in the flue gases to condense resulting in damage to the chimney system unless it’s specifically designed for condensate. If this is the case a suitable condensate drain must be used to protect the boiler from condensate.

NOTE: Our warranty does not cover corrosion damage to the boiler or its vent system caused by flue gas condensate!