A.O. Smith TWI 35-200 Installation, User And Service Manual page 44

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44
Fig. Example concentric venting system
Caution
During installation, obey the instructions delivered with the sets of air supply components
and the flue gas discharge components. Make sure that the venting system does not
exceed the maximum number of 45º and 90º bends and the maximum pipe length.
Caution
Use a run-off of 50 mm per meter towards the water heater.
Refer to the table for the correct pipe dimensions of the C13 and C33 concentric systems.
Description
Diameter flue discharge/
air inlet
Maximum length
Maximum number of 45º and
90º bends
Unit TWI 35–200
TWI 45–200
mm/mm 80/125
m 20
- 5
Installation, Maintenance and Service part