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4.3 CHANGE OVER FUNCTION
4 PIPE AUTOMATIC CHANGE OVER
The TAC controller allows for the control of reversible coil or both cooling and heating coil. The coils are equipped with
their motorised 3-way valves. The offset between the measured temperature (supply air or extract air, to be configured)
and the setpoint will determine if heating or cooling is automatically activated. When the unit is equipped with reversible
coil or with both a cooling and a heating coil, only one setpoint has to be configured: Comfort temperature. The neutral
band prevents the cooling and heating systems from counteracting each other. The neutral band is added to the
comfort setpoint for the activation of the cooling function. The neutral bands has to be configured in the advanced
setup.
13
Operation and maintenance
instructions – CLASS UNIT TAC5
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