Bosch 940 ES Installation And Operating Instructions Manual page 16

Installation instructions
WARNING:
▶ Approved terminators must be used for inlet and exhaust
vent systems to prevent rain from entering the appliance.
Failure to do so may result in damage to the appliance. This
failure is not covered under the manufacturer's warranty.
CAUTION:
▶ The vent system must be installed by a qualified installer in
accordance with these instructions. If improperly installed,
a hazardous condition such as explosion or carbon
monoxide poisoning could result. Bosch Water Heating will
not be responsible for improperly installed appliances.
NOTICE:
▶ In areas where outside temperatures routinely come close
to freezing, sealed combustion operation is required.
Concentric termination or separate terminations for
combustion and vent, must be installed on the same wall or
roof surface; however, never facing the direction of
prevailing winds. Failure to do so may result in heat
exchanger freezing and bursting. This failure is not covered
under the manufacturer's warranty.
WARNING:
Appliance malfunction!
▶ Protect the exhaust and inlet from leaves and debris by
installing a screen on the end of the termination.
¼" mesh minimum opening recommended on screen.
4.3.1 Vent material
This appliance can be installed as direct vent or Category III.
Establish vent clearances that comply with the vent
manufacturer's specifications. In all cases, follow local codes.
See table 5:
Item Diam.
Exhaust Vent 3 or 4 inches Sealed single wall stainless
Intake Vent PVC
Table 5 Venting Specifications
16
Material
steel (AL29-4C)
Sealed PVC or any other rigid
pipe
Horizontal venting systems only:
An optional stainless concentric vent/air intake termination can
be used to provide only one penetration point through the
exterior wall (see fig. 8, 9 & 10). The concentric vent/air
intake kit can be ordered from your local wholesaler. (Part#
ESHCK). Note: Only tee terminals are approved for use with the
concentric vent/air intake kit (see table 6). Vent piping and tee
terminal used with kit must be from the same vent pipe
manufacturer. The appliance can also be installed with
separate air intake and exhaust piping (see fig. 16).
Fig. 8 Concentric kit part # ESHCK
Fig. 9 Concentric kit vent assembly
940 ES – 6 720 644 930 (2019/09)