Ventilation & Combustion Air - UTICA BOILERS Gas-fired Boiler Operating Instructions Manual

VENTILA VENTILA VENTILATION & COMB
VENTILA VENTILA
WARNING: WARNING: WARNING: WARNING: WARNING:
OBSTRUCTED. BY FOLLOWING THE INSTRUCTIONS BELOW, ADEQUATE
COMBUSTION AIR CAN BE MAINTAINED
COMB COMB
COMB COMB COMBUSTION
OUTSIDE
MODEL COMBUSTION COMBUSTION
NUMBER AIR 1 SQ. IN
MGB /5000 BTU/HR
(SEE FIG. 4)
MGB 38
MGB 50
MGB 75
MGB 100
MGB 125
MGB 150
MGB 175
MGB 200
MGB 225
MGB 275
MGB 300
* * * * * Unconfined area: A space whose volume is not less than 50 cubic feet per
1000 BTU per hour of all appliances installed in that space (cubic feet of space = height x
width x length).
** **
** ** ** Confined area: A space whose volume is less than 50 cubic feet per 1000 BTU
per hour of all appliances installed in that space (cubic feet of space = height x width x
length).
1. Ventilation of the boiler room must be adequate to provide sufficient air to properly
support combustion per the latest revision of the National Fuel Gas Code, ANSI Z223.1
section 5.3.
2. When a boiler is located in an unconfined space in a building or conventional construction
frame, masonry or metal building, infiltration normally is adequate to provide air for
combustion and ventilation. However, if the equipment is located in a building of unusually tight
construction (See the national Fuel Gas Code, Ansi Z223.1 section 1.7), the boiler area
should be considered as a confined space. In this case air for combustion and ventilation shall
be provided according to part 5 on page 5. If there is any doubt, install air supply provisions
in accordance with the latest revision of the National Fuel Gas Code.
3. When a boiler is installed in an unconfined space, in a building of unusually tight
TION & COMBUSTION TION & COMB TION & COMB
TION & COMB
AIR OPENINGS TO COMBUSTION AREA MUST NOT BE
USTION USTION
USTION USTION AIR REQ
(MINIMUM SQUARE INCHES OPENING)
* * * * *
UNCONFINED AREA
INSIDE
AIR 1 SQ. IN.
/1000 BTU/HR
(SEE FIG. 3)
8 100
10 100
15 100
20 100
25 125
30 150
35 175
40 200
45 225
55 275
60 300
USTION USTION AIR USTION
USTION
AIR REQ AIR REQ UIREMENTS UIREMENTS
AIR REQ AIR REQUIREMENTS UIREMENTS UIREMENTS
OUTSIDE COMBUSTION AIR
VERTICAL
DUCTS
1 SQ. IN.
/4000 BTU/HR
10
13
19
25
32
38
44
50
57
69
75
PAGE 4
AIR AIR AIR
AIR
** ** ** ** **
CONFINED AREA
HORIZONTAL
DUCTS
1 SQ. IN.
/2000 BTU/HR
19
25
38
50
63
75
88
100
113
138
150