Installation Instructions; Air Requirements - Bosch W 325 K**T1 Installation, Operation And Maintanance

FORWARD
This design complies with CAN1-4.3-77 and ANS1Z21. 1 0.3b
1994 as an instantaneous gas water heater. In addition the
unit complies with CAN1-2.17-M80 for use at high altitude,
2.000-4.500 feet above sea level.
Installation, operation and maintenance information is
provided in this manual. Installation and operation instrution
should be thoroughly reviewed before proceeding with
installation of the BOSCH instantaneous gas water heater.

INSTALLATION INSTRUCTIONS

Note: Proper plumbling, venting, gas connections and an
adequate supply of combustion air are required for safe and
reliable operatrion. Ability equivalent to that of a licensed
tradesman in the field involved is required for installation
and/or servicing of these heaters.
LOCATION
Before installation the BOSCH instantaneous gas water
heater consideration must be given to proper location.
Location should be as close to a chimney or gas vent as
practicable, in an area with an adequate air supply and as
centralized with the piping system as possible. The heater
should not not be located in area where it will be subject to
freezing. The heater should be located in an area where
leakage of the heater or its connections will not result in
damage to the area adjacent to the heater or to lower floors
of the structure.
In order to prevent corrosion, make sure that the combustion
air kept free of aggressive substances. Subtances that
especially contribute to corrosion are halogenated
hydrocarbons (e.g. chlorine and fluorine), which are
contained in solvents, paint, adhesives, propellant gases,
various house hold cleaners, etc. Take precautionary
measures as necessary.
If plastic pipes are used , a 1.5 m metal connection must be
provided on the cold and hot sides.
Note: When such loctions cannot be avoided, it is
recommended that a suitable drain pan, adequately
drained, be installed under the water heater. The pan
must not restrict combustion air flow.
The BOSCH instantaneous gas water heater is designedto
operate on natural or propane gas; however, make sure
that gas onwhich heater is to operate is to operate is the
same as specified on the heater's model/rating plate.
In addition to these instructions, the water heater shall be
installed in accordance with CAN1-B149 Installation Code
(in Canada) or ANSI Z223-1/NFFA 54 National fuel Gas
Code (in U.S.) and/or local installation codes.
These shall be carefully folowed in all cases.

AIR REQUIREMENTS

For safe operation ,sufficient air for combustion, ventilation
and dilution of flue gases must be available. An insufficient
supply of air will result in a yellow luminous burner flame,
causing carboning or sooting of the heat exchanger.
In unconfined spaces, in buildings of normal construction,
infiltration normally is adequate to provide air for combustion,
ventilation and dilution of flue gases. However, a confined
space must be provided with two permanent openings to
provide combustion and ventilation air to the appliance. Each
opening shall have a free area of one square inch per 1000
BTU/Hr* of total input rating os all appliances in the
enlosure.One opening shall be within 12 inches of the top
and one within 12 inches of the bottom of the enclosure.
* SPECIAL NOTE
When the W 400 K... T2 is installed in a confined space of
minimum size the openings described above must be
increased to a size of 1 ½ square inches per 1000 BTU/Hr.
In other words, for the W400 K..T2 installed in a minimum
sized confined space the two openings that are to be made
in the enclosure within 12 inches of the top and 12 inches
of the bottom must each have a minimum free area of, (11/
2") x (117) = 175.5 square inches.
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