EVCO EPH4DXP1SA - Manual (Page 32)

EVCO S.p.A. c-pro 3 hecto MCSA | User manual ver. 2.0 | Code 144MCSAE204
page 32 of 52
It is also possible to decide whether, following activation of the heating/cooling booster, to force the dehumidifier
output to ON status or not.
5.2 Regulation of the flow temperature
5.2.1 Management of the flow circulation pump
Via the appropriate pump parameter they can be managed in the following way:
EXTERNAL: the pump is not managed from the module.
CONTINUOUS: the flow pump will remain activated continuously with system in ON status and in absence of blocking
alarms.
TEMPERATURE REQUEST: the flow pump will be activated on request of at least one of the zone heating/cooling
collectors.
The activation/deactivation of the pump will follow the switch-on/off delay times established via the relevant
parameters.
As well as the request by the zone heating/cooling collectors, the flow circulation pump will be activated for the
following special cycles:
flow line low temperature protection
system anti-freeze protection
anti-grip cycle
The correct operation of the circulation pump is controlled via the digital input associated with the flow switch of the
mixed circuit (consult the relative paragraph for explanation)
5.2.2 Management of the utilities proposed for heating/cooling
Once the water is made to circulate in the system and whenever the flow work set-point is not satisfied, the system
will start a utilities activation request for heating/cooling of the flow water (On-Off remote consent). The request will
remain active until the set-point is satisfied or while the mixing valve remains open (selection from parameter PL21).
If PL21 = 0, the heating/cooling request is deactivated on reaching the flow set; if PL21 = 1, the heating/cooling
request is deactivated with delay defined by PL22 parameter, on complete closure of the mixing valve.
5.2.3 Management of the flow mixing valve
The controller can regulate a mixing valve via a 0-10V proportional analogue output, to control the flow temperature
control.
The mixing valve operating mode can be set for the distinct Summer and Winter operating modes from the following
possibilities:
Valve forced closed: the valve remains always closed during all operations independently from the system operating
conditions.
Valve forced open: the valve remains open at the percentage set while the regulation is active; with regulation off, the
valve is closed.
Valve in modulation mode: mixing valve opening is controlled on the measurement of the flow water temperature with
respect to the regulation set-point.
In the installation phase and on the basis of system features, it will be necessary to set a proportional regulation band
and, if necessary, an integration constant for a PI control.