7
a. If result is greater than or equal to 50 ft³ per 1,000
Btuh, space is considered an
unconfined space
.
b. If result is less than 50 ft³ per 1,000 Btuh, space is
considered a
confined space
.
4. Determine building type. A building of
unusually
tight construction
has the following characteristics:
a. Walls and ceiling exposed to outside atmosphere
have a continuous water vapor retarder with a
rating of 1 perm or less with openings gasketed
and sealed, and
b. Weather-stripping has been added on openable
windows and doors, and
c. Caulking or sealants applied in joints around
window and door frames, between sole plates
and floors, between wall-ceiling joints, between
wall panels, at plumbing and electrical
penetrations, and at other openings.
5. For boiler located in an
unconfined space in a
building of
other than unusually tight construction
,
adequate combustion and ventilation air is normally
provided by fresh air infiltration through cracks
around windows and doors.
6. For boiler located in an
unconfined space in a
building of unusually tight construction
or in a
confined space
, provide outdoor air through
permanent opening(s) which communicate directly
or by duct with the outdoors or spaces (crawl or
attic) freely communicating with the outdoors.
Minimum dimension of air opening(s) is 3" (7.6cm).
a. Two permanent openings: Locate one opening
within 12 " (30.5cm) of top of space. Locate
remaining opening within 12" (30.5cm) of bottom
of space. Size each opening per following:
i
.
Direct communication with outdoors.
Minimum free area of each opening must be
1 square inch per 4,000 Btu per hour input
of all equipment in space.
ii
. Vertical ducts. Minimum free area of each
opening must be 1 square inch per 4,000
Btu per hour input of all equipment in
space. Duct cross-sectional area shall be
same as opening free area.
iii
. Horizontal ducts. Minimum free area of
each opening must be 1 square inch per
2,000 Btu per hour input of all equipment
in space. Duct cross-sectional area shall be
same as opening free area.
b. One permanent opening shall be permitted where
the boiler has clearances of at least 1" (2.5cm)
from the sides and rear and 6" (15.2cm) from the
front. Locate the opening within 12 " (30.5cm) of
top of space. Size opening per following:
i
.
Minimum free area of 1 square inch per 3,000
Btu per hour input of all equipment in space.
ii
. Free area shall not be less than the sum of
the areas of all vent connectors in the
confined space.
Alternate method for boiler located within confined
space
. Use indoor air if two permanent openings
communicate directly with additional space(s) of
sufficient volume such that combined volume of all
spaces meet criteria for unconfined space. Size each
opening for minimum free area of 1 square inch per
1,000 Btu per hour input of all equipment in
spaces, but not less than 100 square inches.
7. Ventilation Duct Louvers and Grilles. Equip
outside openings with louvers to prevent entrance
of rain and snow, and screens to prevent entrance of
insects and rodents. Louvers and grilles must be
fixed in open position or interlocked with
equipment to open automatically before burner
operation. Screens must not be smaller than ¼ inch
mesh.
Consider the blocking effect of louvers, grilles and
screens when calculating the opening size to
provide the required free area. If free area of louver
or grille is not known, assume wood louvers have
20-25 percent free area and metal louvers and
grilles have 60-75 percent free area.
8. For Specially Engineered Installations. The above
requirements shall be permitted to be waived where
special engineering, consistent with good
engineering practice and approved by the authority
having jurisdiction, provides an adequate supply of
air for combustion, ventilation, and dilution of flue
gases.
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Summary of Contents for 805B
Page 13: ...13 Figure 8 Jacket Assembly...
Page 14: ...14 Figure 9 EP OP Control Installation...
Page 17: ...17 Figure 10 Schematic Gas Piping 24V Standing Pilot 806B 807B...
Page 18: ...18 Figure 11 Main Gas Piping Intermittent Ignition EI...
Page 19: ...19 Figure 12 Schematic Pilot Piping Honeywell EI USA...
Page 20: ...20 Figure 13 Schematic Pilot Piping Honeywell EI Canada Natural Gas 805B 810B LP Gas 806B 807B...
Page 21: ...21 Figure 14 Schematic Pilot Piping Johnson EI USA...
Page 22: ...22 Figure 15 Schematic Pilot Piping Johnson EI Canada Natural Gas 805B 810B LP Gas 806B 807B...
Page 23: ...23 Figure 16 Schematic Gas Piping OP Control System 806B 810B...
Page 24: ...24 Figure 17 Schematic Gas Piping OP CSD 1 Control System 808B 810B...
Page 25: ...25 Figure 18 Schematic Gas Piping EP Control System Natural Gas Only 806B 810B...
Page 26: ...26 Figure 19 Schematic Gas Piping EP CSD 1 Control System 808B 810B...
Page 30: ...30 Figure 25 Recommended Boiler Piping for Circulator Zoned Heating Systems...
Page 39: ...39 Figure 31 Wiring Diagram Standing Pilot 24 USA and Canada Continuous Circulation...
Page 40: ...40 Figure 32 Wiring Diagram Standing Pilot 24V USA and Canada Intermittent Circulation...
Page 42: ...42 Figure 33 Wiring Diagram OP OP CSD 1 Ignition System Continuous Circulation...
Page 43: ...43 Figure 34 Wiring Diagram OP OP CSD 1 Ignition System Intermittent Circulation...
Page 45: ...45 Figure 35 Wiring Diagram Honeywell EI USA Continuous Circulation...
Page 46: ...46 Figure 36 Wiring Diagram Honeywell EI USA Intermittent Circulation...
Page 47: ...47 Figure 37 Wiring Diagram Honeywell EI Canada Continuous Circulation...
Page 48: ...48 Figure 38 Wiring Diagram Honeywell EI Canada Intermittent Circulation...
Page 50: ...50 Figure 39 Wiring Diagram Johnson EI USA Continuous Circulation...
Page 51: ...51 Figure 40 Wiring Diagram Johnson EI USA Intermittent Circulation...
Page 52: ...52 Figure 41 Wiring diagram Johnson EI Canada Continuous Circulation...
Page 53: ...53 Figure 42 Wiring Diagram Johnson EI Canada Intermittent Circulation...
Page 55: ...55 Figure 43 Wiring Diagram EP EP CSD 1 Ignition System USA Continuous Circulation...
Page 56: ...56 Figure 44 Wiring Diagram EP EP CSD 1 Ignition System USA Intermittent Circulation...
Page 60: ...60 Figure 49 Lighting Instructions 24V Standing Pilot...
Page 61: ...61 Figure 50 Operating Instructions EI...
Page 62: ...62 Figure 51 Lighting Instructions OP...
Page 63: ...63 Figure 52 Operating Instructions EP...
Page 71: ...71 Honeywell EI Trouble Shooting Guide...
Page 72: ...72 Johnson EI Trouble Shooting Guide...
Page 73: ...73...
Page 74: ...74 SERVICE RECORD DATE SERVICE PERFORMED...
Page 94: ...94...
Page 97: ...97...