Vent Pipe System; Draft Hood Installation; Vent Pipe Size; Vent Connectors - Kenmore 153.337021 Use & Care Manual

CONFINED
SPACE
2000 BTUH
IMPORTANT: If you tack the necessary skills required to
properly install this venting system, you should not proceed, but
get help from a qualified technician.
Draft Hood Installation
Draft hood
Flue Damper
/
1 SQ. INCH PER
2000 BTUH
ALL AIR FROM OUTDOORS USING HORIZONTAL DUCTS
FIGURE 17.
CONFINED
SPACE
ALTERNATIVE
OPENING
LOCATION
1 SQ. INCH
PER 3000 BTUH
ALL AIR FROM OUTDOORS - USING A SINGLE PERMANENT OPENING
FIGURE 18.
Vent Pipe System
%
This water heater uses a non-direct, single-pipe vent system
to remove exhaust gases created by the burning of fossil fuels.
Air for combustion is taken from the immediate water heater
location or is ducted in from the outside (see "Combustion Air
Supply and Ventilation").
This water heater must be properly vented for the removal of
exhaust gases to the outside atmosphere. Correct installation
of the vent pipe system is mandatory for the proper and efficient
operation of this water heater and is an important factor in the
life of the unit.
The vent pipe must be installed according to all local and state
codes or, in the absence of local and state codes, the "National
Fuel Gas Code", ANSI Z223.1(NFPA 54)-current edition. The
vent pipe installation must not be obstructed so as to prevent
the removal of exhaust gases to the outside atmosphere.
IMPORTANT: The use of vent dampers is not recommended
by the manufacturer of this water heater. Although some vent
dampers are certified by CSA International, this certification
applies to the vent damper device only and does not mean they
are certified for use on this water heater.
U.L. recognized fuel gas and carbon monoxide (CO) detectors
are recommended in all applications and should be installed
using the manufacturer's instructions and local codes, rules, or
regulations.
2O
Leg Tips*
* Twist or bend the leg tips to secure the draft hood to the flue damper
FIGURE 19.
Align the legs of the draft hood with the slots provided. Insert
the draft hood leg tips into slots on the flue damper's flange
as shown in Figure 19. Secure the draft hood by twisting or
bending the leg tips. See Figure 19. Do not alter the draft hood
in any way. If you are replacing an existing water heater, be
sure to use the new draft hood supplied with the water heater.
Vent Pipe Size
It is important that you follow the guidelines in these instructions
for sizing a vent pipe system. If a transition to a larger vent size
is required, the vent transition connection must be made at the
draft hood outlet.
Vent Connectors
1. Type B, Double wall, U.L. Listed Vent Pipe.
2. Single walt Vent Pipe.
Maintain the manufacturer's specified minimum clearance from
combustible materials when using type B double wall vent
pipe.
Vent connectors made of type B, double walt vent pipe material
may pass through walls or partitions constructed of combustible
material if the minimum listed clearance is maintained.
Maintain a six inch minimum clearance from all combustible
materials when using single walt vent pipe.
IMPORTANT: Single walt vent pipe cannot be used for water
heaters located in attics and may not pass through attic spaces,
crawl spaces or any confined or inaccessible location. A single
wall metal vent connector cannot pass through any interior
walt.
When installing a vent connector, please note the following
(See Figures 20-22):
• Install the vent connector avoiding unnecessary bends,
which create resistance to the flow of vent gases.
• Install without dips or sags with an upward slope of at least
1/4-inch per foot.
• Joints must be fastened by sheet metal screws or other
approved means. It must be supported to maintain
clearances and prevent separation of joints and damage.
• The length of the vent connector cannot exceed 75% of the
vertical vent height.