Rinnai 4500 Installation Manual download pdf (Page 11)

Rinnai Corporation ROF4500 11

LPG Cylinder Enclosure

Enclosures for LP-gas supply cylinders shall be ventilated by openings at the level of the cylinder valve and at

floor level. This shall be accomplished by one of the following:

A. One side of the enclosure shall be completely open; or

B. For an enclosure having four sides, a top and a bottom:

1. At least two ventilation openings at cylinder valve level shall be provided in the side wall, equally sized,

spaced at 180 degrees, and unobstructed. Each opening shall have a total free area of not less than 1/2

square inch per pound (3.2 sq.cm/kg) of stored fuel capacity and not less than a total free area of 10

square inches (64.5 sq. cm).

2. Ventilation openings shall be provided at floor level and shall have a total free area of not less than 1/2

square inch per pound (3.2 s.cm/kg) of stored fuel capacity and not less than a total free area of 10

square inches (64.5 sq.cm). If ventilation openings at floor level are in a side wall, there shall be at least

two openings. The bottom of the openings shall be at floor level and the upper edge no more than 5

inches (127 mm) above the floor. The openings shall be equally sized, spaced at 180 degrees and

unobstructed.

3. Every opening shall have minimum dimensions so as to permit the entrance of a 1/8 inch (3.2 mm)

diameter rod.

Cylinder valves shall be readily accessible for hand operation. A door on the enclosure to gain access to the

cylinder valves is acceptable, provided it is non-locking and can be opened without the use of tools.

There shall be minimum clearance of 2 inches (50.8 mm) between the lower surface of the floor of the LP-gas

supply cylinder enclosure and the ground.

Minimum of 5” (12.7 cm) from

floor to top of bottom opening

Minimum of 2” (5 cm) from

floor bottom to ground level

Top openings at valve level

Each opening shall have a total free area of not less

than 1/2 square inch per pound (3.2 sq.cm/kg) of

stored fuel capacity and not less than a total free

area of 10 square inches (64.5 sq. cm).

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Rinnai 4500 Installation Manual Page 11