Astria ValiantOD42P3 Руководство по установке и эксплуатации - Страница 7

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4. Compare the maximum Btu/Hr the space can support with the

actual amount of Btu/Hr used.

________ Btu/Hr (maximum the space can support)

________ Btu/Hr (actual amount of Btu/Hr used)

Example: 63,360 Btu/Hr (maximum the space can support)

79,000 Btu/Hr (actual amount of Btu/Hr used)

The space in the above example is a confined space because the actual

Btu/Hr used is more than the maximum Btu/Hr the space can support.

You must provide additional fresh air. Your options are as follows:

A. Rework worksheet, adding the space of an adjoining room. If the

extra space provides an unconfined space, remove door to adjoin-

ing room or add ventilation grills between rooms. See Ventilation

Air From Inside Building, page 9.

B. Vent room directly to the outdoors. See Ventilation Air From

Outdoors.

C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room

unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space

can support, the space is an unconfined space. You will need no ad-

ditional fresh air ventilation.

WARNING: If the area in which the heater may be

operated does not meet the required volume for indoor

combustion air, combustion and ventilation air shall

be provided by one of the methods described in the

National Fuel Gas Code, ANSI Z223.1/NFPA 54, the In-

ternational Fuel Gas Code, or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining unconfined space. When

ventilating to an adjoining unconfined space, you must provide two

permanent openings: one within 12" of the ceiling and one within 12"

of the floor on the wall connecting the two spaces (see options 1 and

2, Figure 3). You can also remove door into adjoining room (see option

3, Figure 3). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA

54, Air for Combustion and Ventilation for required size of ventilation

grills or ducts.

Ventilation

Grills

Into Adjoining

Room,

Remove

Option 1

Door into

Adjoining

Room,

Option

12"

Figure 3 - Ventilation Air from Inside Building

126773-01B

AIR FOR COMBUSTION AND VENTILATION Continued

12"

Ventilation Grills

Into Adjoining Room,

Option 2

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must

provide two permanent openings: one within 12" of the ceiling and

one within 12" of the floor. Connect these items directly to the out-

doors or spaces open to the outdoors. These spaces include attics

and crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/

NFPA 54, Air for Combustion and Ventilation for required size of

ventilation grills or ducts.

IMPORTANT: Do not provide openings for inlet or outlet air into attic

if attic has a thermostat-controlled power vent. Heated air entering

the attic will activate the power vent.

Outlet

Air

Outlet

Air

Inlet

Air

Inlet Air

Figure 4 - Ventilation Air from Outdoors

Astria.US.com

Ventilated

Attic

To Attic

Crawl

Space

Ventilated

Crawl Space