Reliance Water Heaters 6 50YTVIT SERIES 100 Benutzerhandbuch

13

Figure 7. The water heater should have clearances of at least 1 inch 

(25 mm) from the sides and back and 6 inches (150 mm) from the front

of the appliance. The opening should directly communicate with the 

outdoors or should communicate through a vertical or horizontal duct 

to the outdoors or spaces that freely communicate with the outdoors 

and should have a minimum free area of the following:
1.  1 square inch per 3000 Btu/hr (700 mm

2

per kW) of the total input

rating of all appliances located in the enclosure, and

2.  Not less than the sum of the areas of all vent connectors in space.

Confined space should be provided with two permanent horizontal  

ducts, one commencing within 12 inches (300 mm) of top and one

commencing within 12 inches (300 mm) of bottom of enclosure. Horizontal

ducts should communicate directly with outdoors. See Figure 8.
Each duct opening should have a minimum free area of 1 square inch 

per 2,000 Btu/hr (1100 mm

2

per kW) of the aggregate input rating of all

appliances installed in the enclosure.
When ducts are used, they should be of the same cross sectional area 

as the free area of the openings to which they connect. The minimum 

dimension of rectangular air ducts should be not less than 3 inches. 

The illustrations shown in this section of the manual are a reference for 

the openings that provide fresh air into confined spaces only.
Do not refer to these illustrations for the purpose of vent installation. 

See Installation of Vent System on pages 18-27 for complete venting 

installation instructions.

The confined space should be provided with two permanent vertical

ducts, one commencing within 12 inches (300 mm) of the top and

one commencing within 12 inches (300 mm) of the bottom of the

enclosure. The vertical ducts should communicate directly with the 

outdoors. See Figure 9.

Each duct opening should have a minimum free area of 1 square inch 

per 4,000 Btu/hr (550 mm

2

per kW) of the aggregate input rating of

all appliances installed in the enclosure. 

When ducts are used, they should be of the same cross sectional  

area as the free area of the openings to which they connect. The 

minimum dimension of rectangular air ducts should be not less than 

3 inches.

The  confined  space  should  be  provided  with  two  permanent 

openings, one commencing within 12 inches (300 mm) of the top

and one commencing within 12 inches (300 mm) of the bottom of

the enclosure. See Figure 9A.

Each opening should communicate directly with an additional room(s)

of sufficient volume so that the combined volume of all spaces meets

the criteria for an Unconfined Space.

Each opening should have a minimum free area of 1 square inch per 

1,000 Btu/hr (1100 mm

2

per kW) of the aggregate input rating of all

appliances installed in the enclosure. Each opening should not be 

less than 100 square inches (645 cm

2

).