State Water Heaters DIRECT VENT GAS WATER HEATERS, Инструкция по эксплуатации

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7
FACTS TO CONSIDER ABOUT THE LOCATION
Whether replacing an old water heater or putting the water heater in a
new location, the following critical points must be observed.
This manufactured home gas-fired water heater is for use in a
manufactured home. You should carefully choose an indoor location
for the new water heater, because the placement is a very important
consideration for the safety of your occupants in the building and for
the most economical use of the appliance.
This water heater is for
use only in a manufactured home and not intended for outdoor
installation.
This water heater has been designed and certified as a direct vent
(sealed combustion) unit and no draft diverter is to be used.
Minimum clearances between the water heater and combustible and
noncombustible construction are 0” from sides, 0” from back, 4” from
front of jacket to closet door and 27” from top of jacket to combustible
material. Minimum vent clearances: 6”. Provide 24” front clearance for
servicing and adequate clearance between the jacket top and ceiling
for servicing the flue area.
The combustion and ventilation air flow must not be obstructed.
Combustion air must be supplied from outside the manufactured home
by way of the furnished 3” diameter (30 and 40 Gallon) or 4” diameter
(50 Gallon) air intake duct assembly. A 3 1/2” diameter (30 and 40
Gallon) or 4 1/2” diameter (50 Gallon) floor opening below the water
heater is required to accommodate the air intake duct assembly. Weight
of the water heater on duct gasket seals the water heater to air intake
duct assembly.
When a manufactured home is skirted, an air intake opening with a
minimum free area of 32 square inches must be provided in the skirt. If
the opening is covered by louvers or screen, the total free area must
be 32 square inches. Other gas fired appliance in the home will require
additional free air openings; consult these manufacturers for correct
sizing, see Figure 3.
FIGURE 3.
If the manufactured home is installed over a basement or crawlspace,
combustion air must be supplied from outside the manufactured home.
The combustion air intake piping can be 3” PVC for 30 and 40 gallon
models and 4” PVC for 50 gallon models. The air intake piping cannot
exceed a total of 30 feet including vertical and horizontal runs and
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have no more than 3 elbows. All horizontal runs require adequate
support at 3 1/2 feet intervals., see Figure 4.
FIGURE 4.
The water heater should be secured to the floor and to the wall of the
enclosure with the mounting brackets provided. For bracket location
refer to Securing Water Heater to Floor and Wall” in the “Installing the
New Water heater” section.
Installation of the water heater must be accomplished in such a manner
that if the tank or any connections should leak, the flow will not cause
damage to the structure. For this reason, it is not advisable to install the
water heater in an attic or upper floor. When such locations cannot be
avoided, a suitable drain pan should be installed under the water heater.
Drain pans are available at your local hardware store. Such a drain
pan must have a minimum length and width of at least 2 inches (51 mm)
greater that the water heater dimensions and must be piped to an
adequate drain. The pan must not restrict combustion air flow. When a
drain pan is required, see installation instructions on page 9.
Water heater life depends upon water quality, water pressure and the
environment in which the water heater is installed. Water heaters are
sometimes installed in locations where leakage may result in property
damage, even with the use of a drain pan piped to a drain. However,
unanticipated damage can be reduced or prevented by a leak detector
or water shut-off device used in conjunction with a piped drain pan.