Vent-Axia sentinel Kinetic MVHR series User Instructions - page 14
Operation and Monitoring
Sentinel Kinetic MVHR User Instructions
14
Defrost Active Screen
The Antifrost screen is only displayed if a summer
bypass is fitted. In installations where a negative
pressure is not permitted during antifrost operation, set
this to bypass mode.
Available options: Airflow Mode (default) and Bypass
Mode.
Airflow Mode - When the supply air temperature is
between 0° and -20°C, antifrost will automatically
activate. This will reduce the supply airflow rate and
increase the extract airflow rate to prevent frost forming
on the heat exchanger. During antifrost operation the
supply motor can stop for 15 minutes and run for 45,
depending on the temperature below 0°C. If the supply
air temperature is -20°C or below the supply fan
switches off and the extract fan continues to run at
reduced rate to prevent frost forming on the heat
exchanger.
Bypass Mode - While the supply air temperature is
below 0°C, the antifrost mode will automatically
activate. This mode will open the bypass to prevent
frost forming on the heat exchanger.
Defrost Active
Airflow Mode
Room Too Cold Screen
The Room Too Cold screen displays the status of the
fan. If the heating system in the building fails or is
switched off and the internal temperature drops below
5°C, the unit will stop running so as to not bring cold air
into an already cold house. The unit will start up every
hour and will run for a short time to measure the
temperature of the property. When the temperature
rises, e.g. the heating system is switched back on, the
unit will restart and continue normal operation.
Bottom line of display may be ( Fan Off, Fan
Restarting).
Room Too Cold
Fan Off
BMS Screen
The BMS screen shows if a Fan Off command has
been received from a Building Management System
(BMS), if used.
A Fan Off command could be received from the BMS
in the event of a fire alarm.
BMS Mode
Fan Off