Weil-McLain GV90+, Руководство пользователя

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Part number 550-143-010/1021
50
GV90+
series
2
gas-fired water boiler – boiler manual
Figure 60 MINIMUM combustion air openings for direct exhaust applications — ALL OPENING SIZES ARE FREE AREA
The GV90+ boiler CANNOT be in the same space with other appliances if
clearances around the GV90+ are less than the recommended service clear-
ances shown in Figure 2, page 6 .
If the space is smaller than
Figure 2, page 6 , provide
openings ONLY as shown on
page 7 and Figure 4, page 7 .
GV90+ boiler
WITHOUT other
appliances in room
Air openings
The required air opening sizes below are FREE AREA,
after reduction for louver obstruction. Note the ex-
ception below for large spaces.
GV90+ boiler
WITH other
appliances in room
TWO openings, each at least:
1 square inch per 1,000 Btuh
of all appliances in the room
TWO openings, each at least:
1 square inch per 4,000 Btuh
of all appliances in the room
TWO openings, each at least:
1 square inch per 4,000 Btuh
of all appliances in the room
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
of all appliances in the room
TWO openings, each at least:
1 square inch per 4,000 Btuh
of all appliances in the room
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
of all appliances in the room
TWO openings, each at least:
1 square inch per 4,000 Btuh
of all appliances in the room
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
of all appliances in the room
TWO openings, each at least:
1 square inch per 4,000 Btuh
of all appliances in the room
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
of all appliances in the room
TWO openings, each at least:
1 square inch per 2,000 Btuh
of all appliances in the room
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
of all appliances in the room
TWO openings, each at least:
1 square inch per 2,000 Btuh
of all appliances in the room
— OR —
ONE opening **, each at least:
1 square inch per 3,000 Btuh
of all appliances in the room
** NOTICE:
Requirements for using the SINGLE air opening
option.
A single combustion air opening can be used for cases b , c or d above, sized as listed, provided that:
• The single opening must communicate directly to the outdoors or to a space that communicates
directly with outdoors (NOT to an interior space).
• The top of the opening must be within 12 inches of the ceiling.
• The free area of the opening must be at least equal to the sum of the areas of all equipment vent
connectors in the space.
SPECIAL EXCEPTION FOR LARGE SPACES:
NO combustion air openings are needed when the boiler (and other appliances) are installed in a space
with a volume NO LESS than 50 cubic feet per 1,000 Btuh of all appliances in the space. That is, total
the input of all appliances in MBH (1,000’s of Btuh), then multiply this total times 50. The building MUST
NOT be of tight construction.
Example: For a total input of 500 MBH (500,000 Btuh), the minimum volume would be 50 x 500 = 25,000
cubic feet (3,125 square feet if ceiling height is 8 feet).
DIRECT EXHAUST — Boiler room air openings
(cont.)