4.
Indoor Air Opening Size and Location
: Openings
connecting indoor spaces shall be sized and located as
follows:
a.
Combining Spaces on the Same Floor
: Provide
two permanent openings communicating with
additional spaces that have a minimum free area
of 1 in
2
per 1000 Btu/hr (22 cm
2
per 1000 W) of
the total input rating of all gas fired equipment but
not less than 100 in
2
(645 cm
2
). One opening is to
begin within 12 inches (305 mm) from the top of
the space and the other is to begin within 12
inches (305 mm) from the floor. The minimum
dimension of either of these openings shall be 3
inches (76 mm), see Figure 1.2 for an illustration
of this arrangement.
b.
Combining Spaces on Different Floors
: Provide
one or more permanent openings communicating
with additional spaces that have a total minimum
free area of 2 in
2
per 1000 Btu/hr (44 cm
2
per
1000 W) of total input rating of all equipment, see
Figure 1.3 for an illustration of this arrangement.
5.
Outdoor Combustion Air
: Outdoor combustion air is
to be provided through one or two permanent
openings. The minimum dimension of these air
openings is 3 inches (76 mm).
a.
Two Permanent Opening Method
: Provide two
permanent openings. One opening is to begin
within 12 inches (305 mm) of the top of the space
and the other is to begin within 12 inches (305
mm) of the floor. The openings are to
communicate directly or by ducts with the
outdoors or with spaces that freely communicate
with the outdoors. The size of the openings shall
be determined as follows:
i.
Where communicating directly or through
vertical ducts with the outdoors each opening
shall have a minimum free area of 1 in2 per
4000 Btu/hr (22 cm
2
per 4000 W) of total
input rating for all equipment in the space, see
Figure 1.4 for openings directly
communicating with the outdoors or Figure
1.5 for openings connected by ducts to the
outdoors.
Figure 1.2:
Air Openings – All Air from Indoors
on the Same Floor
Figure 1.3:
Air Openings – All Air from Indoors
on Different Floors
Figure 1.4:
Air Openings – All Air Directly from
Outdoors
Figure 1.5:
Air Openings – All Air from Outdoors
through Vertical Ducts
4
PREINSTALLATION
Summary of Contents for PUREFIRE PFW-199
Page 20: ...18 WATER PIPING AND CONTROLS Figure 4 3 Schematic Piping One Boiler with a Single Storage Tank...
Page 60: ...58 Figure 13 2 Heat Exchanger Burner Assembly Repair Parts REPAIR PARTS...
Page 63: ...61 APPENDIX A STATUS SCREENS APPENDIX A STATUS SCREENS...
Page 64: ...62 APPENDIX A STATUS SCREENS...
Page 65: ...63 APPENDIX A STATUS SCREENS...
Page 66: ...64 APPENDIX B USER MENU APPENDIX B USER MENU...
Page 67: ...65 APPENDIX B USER MENU...
Page 68: ...66 APPENDIX C INSTALLER MENU APPENDIX C INSTALLER MENU...
Page 69: ...67 APPENDIX C INSTALLER MENU...
Page 70: ...68 APPENDIX C INSTALLER MENU...
Page 71: ...69 APPENDIX C INSTALLER MENU...
