EVCO c-pro CLIMA sistema Installer manual - Manual (Page 74)

C-PRO CLIMA SISTEMA INSTALLER MANUAL
Page 74
9.2.3 Management of the utility set-up for cooling delivery water: the chiller
(MCCT module)
During summer regulation, once water has been made to circulate in the system, whenever the
delivery temperature is above the Summer delivery work set-point of the hysteresis value, then a
chiller activation request will be sent.
Correct chiller functioning is controlled via a chiller-heat pump digital input alarm which, whenever
activated, will block the utility immediately.
Important parameters:
MCCT: Installer menu
General parameters CH-HP type
MCCT: Maintenance Menu Delivery lines Pump management CH-HP delay
9.2.4 Delivery work set-point (MCCT module)
The summer/winter delivery work set-point is established in manual mode in the installation phase
of the system by authorised staff and differs according to the type of system is installed, i.e. due to
High Temperature line (H.T. at radiators) or Low Temperature line (L.T. at floor).
The delivery work set-point corresponds with the effective regulation set-point only when the
mixing valve is not present in delivery.
Important parameters:
MCCT: Maintenance Menu
Delivery lines Temp. Regulation Setpoint S LT
MCCT: Maintenance Menu Delivery lines Temp. Regulation Setpoint W LT
MCCT: Maintenance Menu Delivery lines Temp. Regulation Setpoint S HT
MCCT: Maintenance Menu Delivery lines Temp. Regulation Setpoint W HT
9.2.5 Output of the delivery mixing valve (MCCT module)
The thermal power plant controller can regulate a mixing valve for every delivery line, via two 0-
10V proportional analogue outputs.
If the mixing valve check is enabled, the regulation set-point of the delivery line will be given by
the regulation set-point calculated for the valve
The mixing valve control can be enabled individually for each delivery line.
Normally the mixing valve is used for low temperature delivery lines in high-low temperature
systems.
It is possible to set the functioning mode of the mixing valve for the distinct summer and winter
functioning mode among the following possibilities:
- Valve forced closed: the valve remains always closed during the entire functioning
independently from the system functioning conditions.
- Valve forced open: the valve remains open at the percentage set until the regulation is
active, with regulation off the valve is closed.
- Valve in modulation: the opening of the mixing valve is controlled on the measurement of
the delivery water temperature with respect to the regulation set-point.
In the installation phase it is necessary to set a proportional regulation band and, if
necessary, an integration constant for a PI control, on the basis of system features.