Water Connections - Bosch WR 400-3.K Série Mode D'emploi

DRIP TRAY
If the water heater is being mounted above a floor of
combustible construction the drip tray (shipped loose in the
carton with the water heater) must be attached to the bottom
of the front cover of the water heater at the time of
installation. The drip tray should be attached to the front
cover, using screws provided, as shown in Figure 3.
Failure to use drip tray when installing unit above a floor of
combustible construction will cause an unsafe condition and
possible fire and will be in violation of A.G.A and C.G.A.
certification of the unit.
INCANDESCENT PARTICLE TRAY
Figure 3
VENTING
The BOSCH instantaneous water heaters have built- in draft
diverters and are designed for indoor installation only. The
draft diverter outlet must be connected to a clear, unob-
structed vent of the same size, or lager, refer to:
- in Canada, CAN/CGA – B149 Installation Code for
detailed requirements.
- In U.S.A., ANSI Z223. 1 - latest edition, National Fuel
Gas Code for detailed requirements.
The flue connection for the WR 400-3.K.. is 130mm (5
inches); however, in Canada for installation at high altitude
(2.000-4.500 ft, above sea level) a six inch (6'') flue is re-
quired, in Canada a 5''x 6'' adapter is required with the
WR400-3.K.. high altitude installations.
Figure 4
SCREWS
5" X 6" ADAPTOR
USED ON HIGH ALTITUDE
For high altitude use the adapter must be installed as shown
in Figure 4, without alteration, before connecting the six
inch flue to the unit. The adapter must be secured to the
draft diverter outlet with a minimum of two screws.
Also, in Canada, the gas pressure regulator supplied with
the water heater is factory preset to deliver gas to the water
heater at the proper pressure setting for high altitude op-
eration, see PRESSURE REGULATION section of this
manual, table 1 on page 8.
WARNING!
Failure to increase vent size on WR400-3.K.. to six inches
and/or to assure that manifold is set to proper value listed
on rating plate for applications at altitudes in range 2.000
to 4.500 ft. above sea level will cause unsafe venting, as-
phyxiation, and voids C.G.A. certification.

WATER CONNECTIONS

The BOSCH instantaneous water heaters are provided with
two S-bend water connectors/adapters that must be
connected to inlet and outlet connections on water valve
assembly, see figure 5 below.
Figure 5
The purpose of the S-bend water connectors/adapters is to
provide threaded water connections that meet standards
used in North America, ANSI Standard Taper Pipe Thread
(1 ½" NPT).
The cold water should be connected to S-bend attached to
inlet of water valve and hot water connection should be
made to S-bend attached to outlet of water valve.
If plastic piping is to be used, a 1.5 meter (approx. 5 feet)
length of metal piping must first be attached to both the
cold water inlet and hot water outlet of the water heater.
Note: A shut-off valve should be placed in the cold water
supply line to the heater to facilitate servicing the
heater.
5