Bosch GWH C 800 ES - Venting

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16
Installation instructions
3.12 Venting
An optional concentric vent/air intake termination can
be used for the installation of a vertical venting system
as well as for a horizontal venting system. (see Fig. 26,
page 20 and Fig. 29, page 21). The concentric vent/air
intake body can be ordered from your local wholesaler.
(Part# KGAVT0601CVT).
The appliance can also be installed with separate air
intake and exhaust piping (see Fig. 27, page 20. and
Fig. 30, page 21).
The termination shall be at least 3 ft (910mm) away from
a gas utility meter, service regulator or the like.
All vent pipes must be glued, except for the exhaust
accessory (see Fig. 23, page 16) which is screwed into
place on the top of the appliance. Slide the vent pipe
into the exhaust accessory. The exhaust pipe must be
properly supported and must be pitched minimum of a
1/4 inch per foot back to the appliance. This allows the
condensate to drain.
Vent Safety System
The GWH C 800 ES will shut down if inadequate
exhaust venting is detected or a lack of combustion air
is provided to the unit; see troubleshooting section on
page 37. See error code to confirm error, correct the
problem and then reset the heater before operating.
Attaching the exhaust and air inlet connection
adaptors to the top of the heater
Fig. 23 Exhaust connection
Fig. 24 Inlet connection
B Attach the flue gas exhaust accessory to the top of
the unit Fig. 23 (position 1) using the 4 screws and
gasket provided, and fully insert vent pipe into the
accessory. Take extra care that the blue gasket is
positioned properly.
B Attach the combustion air inlet accessory to the top
of the unit Fig. 24 (position 2) using the 3 screws and
gasket provided, and install 3" air intake pipe over the
accessory.
NOTE: The combustion air accessory can be
installed on the top right or on the top left side of the
heater. The combustion air inlet that is not used must
be kept sealed.
Warning: Do not reduce the vent
(exhaust and combustion) pipe sizes
and do not common vent with any other
vented appliance or stove.
Warning: Failure to vent the exhaust
gases to the outside (see Table 3 for
proper material) may result in
dangerous flue gases filling the
structure in which it is installed.
i
Observe the listed maximum lengths of
vent system, which vary depending on
type of termination used. The maximum
permissible lengths are listed in Table 9.
i
Ensure that exhaust vent pipe is fully
inserted in collar past the blue gasket for
a proper seal.