Use and Care Manual

23
Increasers are required when using 3 in. flexible pipe.
3 in. Elbow
ISIS0203
(Centrotherm®)
H
V
Slope the Vents
Upward
Slope the Vents
Upward
6.3 Select a Vent Type
Combustion air is
supplied from the
outdoors. Combustion
air and exhaust are
seperate vent pipes.
Combustion
air
Exhaust
Direct Vent
Combustion air is
supplied from the
surrounding indoor air.
Combustion
air
Exhaust
Non-Direct Vent (with SV Conversion Kit SV-CK-2)
Combustion air is
supplied from the
surrounding indoor air.
Combustion
air
Exhaust
Non-Direct Vent (with Flex Vent 2 in. Conversion
Kit EZ2-CK)
The Water Heater can
be installed outside
using the Outdoor Vent
Cap (VC-6).
Combustion
air
Exhaust
Outdoor (with Outdoor Vent Cap VC-6)
This Water Heater is suitable for Common Vent
System. To make a Common Vent System, refer to
the Common Vent installation manual or contact
Noritz America at http://support.noritz.com/ or
1-866-766-7489 for details.
Common Vent
Combustion
air
Exhaust
Exhaust gasses and
combustion air must not
be combined into a single
PVC pipe using a “Y”
fitting.
WARNING
Combustion
air
Exhaust
Single
Pipe
Venting the Water Heater