Bosch GWH 345 ESR-N Manual page 14

Installation instructions
Vent pipe
Fig. 14 Maximum vent and combustion air lengths
Vent material
The GWH-345/450-ESR requires 3 inch sealed single
wall stainless steel vent pipe (AL29-4C). Use of any
other vent material will void the manufactures warranty
and may result in a hazardous condition. For specific
questions concerning vent material, specifications,
usage or installation, contact the vent manufacturer
directly.
Company Contact information
Z-flex www.z-flex.com
800-654-5600
ProTech www.protechinfo.com
Industries 800-766-3473
Heat-Fab www.heatfab.com
800-772-0739
Table 4 Vent manufacturer contact information
14
3" Horizontal
terminator
3" Vertical
terminator
90°
Condensate
drain Tee
Horizontal
Condensate
drain
Condensate
Combustion
Drain Tube
air intake
Table 5 Approved vent termination and condensate
6720607909-14.3JS
Contact your Bosch supplier for stocked vent material.
Vent Safety System
The GWH-345/450-ESR 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 34. Correct the problem and then reset the heater
before operating.
3.6.2
Exhaust vent connection
B Attach the flue gas exhaust accessory (8 705 504
B Insert 3" single wall stainless steel vent pipe into
Note: Failure to fully insert and tighten vent pipe may
cause flue gas leakage or condensate damage that is
not covered under the manufacturer's warranty.
Fig. 15 Exhaust vent connection
Z flex
TEE only
2SVSRCF03
2SVEVWCF03
2SVEDWCF03
2SVEDTK
drain part numbers (subject to change)
Vent connections and combustion air inlet
restrictors
142) to the top of the unit (position 1) using the 4
screws and gasket provided
exhaust vent adapter 1.5" and tighten the clamp
(position 2).
Protech Heat Fab
TEE only 9390 TEE
FSRC3 5300CI
FST3 &
93PLSTEE
FSDF3
FSHD03 9321
N/A 7000TUBE
6 720 607 909