For servicing access, a 2ft clearance is recommended to the
The following specialized tools may be required for installation:
Combustion Gas Analyzer
940 ES – 6 720 644 930 (2019/09)
Model 940 ES
Please follow these instructions. Failure to follow
instructions may result in:
▶ Damage or injury.
▶ Improper operation.
▶ Loss of warranty.
▶ The water heater 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
Thermotechnology Corp. is not responsible for improperly
Common installation practice is to first determine the venting/
combustion air point of termination, then design the piping
layout back to the heater.
▶ Do not reduce the exhaust or combustion air vent pipe
▶ Do not common vent with any other vented appliance or
Flue gas poisoning!
▶ Failure to vent the exhaust gases to the outside with sealed
stainless steel vent pipe (AL29-4C) may result in
dangerous flue gases filling the structure in which it is
▶ Do not mix vent pipe or joining methods from different