5
a. If result is greater than or equal to 50 ft³ per
1,000 Btuh, space is considered an
unconfi ned
space
.
b. If result is less than 50 ft³ per 1,000 Btuh, space
is considered a
confi ned 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 fl oors, between wall-ceiling joints, between
wall panels, at plumbing and electrical
penetrations, and at other openings.
5. For boiler located in an
unconfi ned space in a
building of
other than unusually tight construction
,
adequate combustion and ventilation air is normally
provided by fresh air infi ltration through cracks
around windows and doors.
6. For boiler located within
unconfi ned space in
building of unusually tight construction
or within
confi ned space
, provide outdoor air through two
permanent openings which communicate directly or
by duct with the outdoors or spaces (crawl or attic)
freely communicating with the outdoors. Locate one
opening within 12 inches of top of space. Locate
remaining opening within 12 inches of bottom of
space. Minimum dimension of air opening is 3
inches. Size each opening per following:
a. Direct communication with outdoors. Minimum
free area of 1 square inch per 4,000 Btu per hour
input of all equipment in space.
b. Vertical ducts. Minimum free area of 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.
c. Horizontal ducts. Minimum free area of 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.
Alternate method for boiler located within confi ned
space
. Use indoor air if two permanent openings
communicate directly with additional space(s) of
suffi cient volume such that combined volume of all
spaces meet criteria for unconfi ned 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 fi xed 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.
I
.
Do not install boiler
where gasoline or other
fl ammable vapors or liquids, or sources of hydrocarbons
(i.e. bleaches, cleaners, chemicals, sprays, paint
removers, fabric softeners, etc.) are used or stored.
N
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II. Unpack Boiler
N
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A.
Move boiler to approximate installed position.
B.
Remove all crate fasteners.
C.
Lift outside container and remove with all other inside
protective spacers and bracing. Save two of the
wooden slats from the container sleeve for use in
Paragraphs E and F.
D.
Remove all boiler hold-down fasteners.
E.
Tilt the boiler to one side and slide a wooden slat under
the two raised feet.
F.
Tilt the boiler to the other side and slide another
wooden slat under the two raised feet.
G.
Slide the boiler forward or backward off the skid using
the two wooden slats as runners.
H
. Move boiler to its permanent location.
Summary of Contents for 2PV Series
Page 19: ...19 Figure 17 Operating Instructions...
Page 20: ...20...
Page 21: ...21...
Page 22: ...22...
Page 32: ...32...
