AquaStar 125B NGS Handleiding voor installatie en gebruik - Pagina 5

Blader online of download pdf Handleiding voor installatie en gebruik voor {categorie_naam} AquaStar 125B NGS. AquaStar 125B NGS 16 pagina's. Automatic instantaneous type water heaters for use with natural and liquefied petroleum gas

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COMBUSTION AIR REQUIREMENTS

Observe the following instructions concerning combustion

air.

Appliances located in unconfined spaces:

a) An unconfined space is one whose volume is greater

than 50 cubic feet per 1000 Btu per hour of the combined

rating of all appliances installed in the space. That would

be 5850 cubic feet for the AquaStar 125B "S" alone.

b) In unconfined spaces in buildings of conventional frame,

masonry, or metal construction, infiltration is normally

adequate to provide air for combustion, ventilation, and

dilution of flue gasses.

Appliances located in confined spaces:) The confined

space must be provided with two permanent openings,

one commencing within 12 inches of the top and one

commencing within 12 inches of the bottom of the

enclosure. Each opening must have a minimum free area

of one square inch per:

- 1000 Btu/hr if all air is taken from inside the building.

- 2000 Btu/hr if all air is taken from the outside by horizontal

ducts.

- 4000 Btu/hr if all air is taken from the outside by direct

openings or vertical ducts.

Louvers, grills and screens have a blocking effect. If the

effective free area is not known, increase the sizes of your

openings by 75% if your louvers are wood and by 30% if

your louvers are metal. Refer to the National Fuel Gas

Code for complete information. In buildings of tight

construction all air should be taken from outside.

CLEARANCES

The Aquastar 125 B "S" is design certified for installation

on a combustible wall and for installation in an alcove with

the minimum clearances to combustible and non -

combustible construction listed below

A. Top 12 inches ( 305 mm)

B. Front Open

C. Back 0 inches

D. Sides 4 inch (102mm)

E. Bottom 12 inches (306 mm)

Note: Minimum clearance to combustible materials should

not be less than 6" for single wall flue pipe. Note that this

clearance can be reduced if combustible material are

protected as per table VI of the National fuel Gas Code or

if Type B gas vent is used.