Features - Viessmann AirflowPLUS Installation And Operating Instructions Manual

Product Description

Features

8
Viessmann AirflowPLUS AH2A Installation, Operating and Service
Pump exercise function
If the internal circulating pump has not run in the previous
24 hours, the control will turn the pump on for 1 minute
to flush the lines and heat exchanger. This will help
ensure that the water lubricated pump does not seize
during long periods of inactivity.
Home freeze protection
The Viessmann AirflowPLUS AH2A series air handlers
have an integrated sensor which will help prevent the
home from freezing due to a faulty thermostat. Should
the ambient temperature get too low, the control will turn
the air handler on automatically and maintain the home
at approximately 40°F (4°C).
Note: this feature will only work if the boiler is turned on
and the air handler has power. While in Home
freeze protect mode the alarm relay and red light
will be on. Refer to page 42.
Status and alarm indicators
A bicolor LED indicator is installed in the air handler
housing and is used to indicate alarm, test mode, and
normal operation. The indicator will display temperature
readings of the sensors during normal operation.
Alarms
Should service problems arise the Viessmann AirflowPLUS
AH2A series will notify the user with a housing mounted
LED. Dry contacts are provided on the controller which
can be connected to an external device such as a warning
light or home security system.
Customizing
The heating and cooling features can be field customized
to provide maximum comfort for almost any home or
location. Refer to page 28, 33, 34 and 35.