Combustion Air And Ventilation Appliances; In Unconfined Spaces; In Confined Spaces - Kenmore 3314 - Power Miser 12 Owner's Manual

Donotapply insulation tothe topofthe water h eater, asthis
willinterfere withsafe operation ofthedrafthood.
Donotcover t heouter d oor, t hermostat ortemperature &
pressure r elief v alve.
Donotallow insulation tocome within 2"(50.8 mm) o fthe
floor t oprevent blockage ofcombustion airflow totheburner.
Donotcover t heinstruction manual. Keep itonthesideof
thewater h eater ornearby forfuture reference.
Doobtain newwarning a ndinstruction labels fromSears
forplacement ontheblanket directly over t heexisting labels.
Doinspect theinsulation blanket frequently tomake certain
it does notsag, t hereby o bstructing combustion airflow.
commence w ithin12inches (30cm)of thetop andone
commencing within 12inches (30cm)of thebottom ofthe
enclosures.
Combustion Air and Ventilation for
Appliances Located in Unconfined Spaces
UNCONHNED SPACE is space whose volume is not less than
50 cubic feet per 1,000 Btu per hour (4.8 m_ per kW) of the
aggregate input rating of all appliances installed in that space.
Rooms communicating directly with the space in which the
appliances are installed, through openings not furnished with
doors, are considered a part of the unconfined space.
In unconfined spaces in buildings, infiltration may be adequate
to provide air for combustion, ventilation and dilution of flue
gases. However, in buildings of tight construction (for example,
weather stripping, heavily insulated, caulked, vapor barrier, etc.),
additional air may need to be provided using the methods
described in Combustion Air and Ventilation for Appfiances
Located in Confined Spaces.
Combustion Air and Ventilation for
Appliances Located in Confined Spaces
CONFINED SPACE is a space whose volume is less than
50 cubic feet per 1,000 Btu per hour (4.8 m 3 per kW) of the
aggregate input rating of all appliances installed in that space.
A. ALL AIR FROM INSIDE BUILDINGS:
(See Figure 9 on page 9 and Figure 10 below)
The confined space shall be provided with two permanent
openings communicating directly with an additional room(s)
of sufficient volume so that the combined volume of all spaces
meets the criteria for an unconfined space. The total input of
al! gas utilization equipment installed in the combined space
shall be considered in making this determination. Each
opening shall have a minimum free area of one square inch
per 1,000 Btu per hour (22 cm2/kW) of the total input rating of al!
gas utilization equipment in the confined space, but not less
than 100 square inches (645 cm2). One opening shall
FIGURE 10.
B. ALL A_R FROM OUTDOORS: (See Figures 9, 11,12 and 13)
The confined space shall be provided with two permanent
openings, one commencing within 12 inches (30 cm) of the
top and one commencing within 12 inches (30 cm) from the
bottom of the enclosure. The openings shall communicate
directly, or by ducts, with the outdoors or spaces (crawl or attic)
that freely communicate with the outdoors.
ALT. HNL_=TAHR VENTHLATHON LOUVERS
FIGURE11.
When directly communicating with the outdoors, each opening
shall have a minimum free area of 1 square inch per 4,000 Btu
per hour (5.5 cm_/kW) of total input rating of all equipment in the
enclosure. See Figure 12.
When communicating with the outdoors through vertical
ducts, each opening shall have a minimum free area of
1 square inch per 4,000 BTU per hour (5.5 cm2/kW) of total
input rating of al! equipment in the enclosure. See
Figure 12.
11