Remote Return Air Sensor (T5); Ambient Sensor (T6); Sensor Locations - Viessmann AirflowPLUS AH2A-213 Installation, Service And Operating Instruction

Installation

Remote Return Air Sensor (T5)

Ambient Sensor (T6)

Sensor Locations

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Viessmann AirflowPLUS AH2A Installation, Operating and Service
Remote sensor installation
Note: If the A/C coil is installed in the return air plenum.
• The remote return air sensor must be installed.
This sensor is then inserted into the return air duct at
a location approximately 15" (380 mm) upstream of
the A/C coil. (Pages 14 and 15)
• Set dip switches as per the system preference.
The remote return air sensor is preinstalled within the
Viessmann AirflowPLUS cabinet complete with a 10 ft.
(3 m) cable lead for remote sensor locations. Remove
the strap from the sensor lead and install in the required
location.
It should be noted that this is a precautionary measure
and is not designed to prevent water line freezing in
situations where the ambient temperatures may get too
low.
The ambient sensor provides air handler operation when
ambient temperatures outside of the air handler cabinet
are less than 40°F (4°C).
The sensor connector is plugged onto the control board
and routed through the cabinet fan tray openings up to
the top panel.
Legend
A Supply water temperature
B Ambient temperature
C Return air temperature
D Discharge air temperature
E Remote air temperature (not shown)