Installer manual Owner manual

C-PRO CLIMA SISTEMA INSTALLER MANUAL
Page 77
9.2.9 Delivery anti-freeze protection (MCDE module)
During the winter functioning mode when the system is not running (i.e. in OFF state or with time
bands enabled but in a day when the system is off), however an delivery anti-freeze protection
control remains active
If the external temperature goes below the predefined anti-freeze threshold, the system will function
with special circulation pumps activation in order prevent breakage in the system caused by frozen
pipes.
- External temperature lower than 4.0°C: delivery pumps always active;
- External temperature between 5.0 and 1.5 °C: delivery pumps active 10 minutes every 6
hours;
- External temperature over 1.5°C: delivery pumps off
When the external temperature is between -4.0 and -5.0°C the delivery pumps behaviour depends
on the previous situation.
9.3 Regulation of the zone humidity (MCZN, MCCT, MCDE modules)
9.3.1 Regulation principle
Whenever the function is enabled and a room humidity transducer is present in zone, during
SUMMER functioning mode when the relative humidity detected by the room humidity transducer
is over the active zone humidity set-point value plus the value of the differential, the MCZN
regulator will activate the corresponding manifold/zone dehumidification valve.
Whenever dehumidification makes use of the delivery water for its action (established via the
relative parameter), the activation of the manifold/zone dehumidification valve generates the same
sequence of activations/controls triggered with zone heating/cooling.
For its functioning, consult the zone temperature regulation part.
9.3.2 Management of the dehumidification manifold/valve (MCZN module)
The manifold/zone dehumidification valve is activated when the value of the room relative
humidity is over the active room humidity set-point + hysteresis value (differential).
Important parameters:
MCZN: Installer menu  Zones  Zone A(B)setup  Sensor type
MCZN: Installer menu  Zones  Zone A(B)setup  H. probe pos.
MCZN: Installer menu  Zones  Zone A(B)setup  Dehum. with H2O
MCZN: Installer menu  Zones  Zone A(B)setup  Zone probe signal  Probe type
MCZN: Installer menu  Zones  Zone A(B)setup  Zone probe signal)  Min H. value
MCZN: Installer menu  Zones  Zone A(B)setup  Zone probe signal)  Max H. value
MCZN: Maintenance Menu Zone A(B) Maintenance Regulation enabling  Humidity
MCZN: Maintenance Menu Zone A(B) Maintenance Humid. regulation Hysteresis