EVCO EPH4DXP1SA - Manual (Page 6)

EVCO S.p.A. c-pro 3 hecto MCSA | User manual ver. 2.0 | Code 144MCSAE204
page 6 of 52
1.2 Foreword regarding regulation
As shown by the application layout, the control and regulation functions, with consequent I/O necessary for the MCSA,
are:
• Zone 1 temperature humidity request from sensors mounted on V-Room
• Zone 2 one temperature request from analogue probe
• Heating/cooling booster
• Modulating flow valve regulation also with climatic curve and dynamic set (external temperature)
• Remote ON – OFF consent (control) to – Chiller – boiler- etc. (and relative lock feedback)
• Remote ON - OFF consent (control) to pump
• Mixing circuit flow switch management
• Dew point calculation
• Management of flow/valve shifting set-point (climatic curve)
• Management of zone 1 and zone 2 distinct weekly time periods
• System anti-freeze protection
• High and low flow temperature management
• External thermostat management from digital input
• Auxiliary dehumidifier management from digital input
Example of connection sequence for heating mode:
- Collector heads ON.
- ON for flow line circulation pump (a parameter will define whether mounted in apartment or whether remote).
This aspect determines operation and control of the energy count solenoid valve (if present in the system) in
pump only operating mode (remote ON-OFF control in OFF mode). The start-up and successive piloting of the
pumps takes place considering the relative safety devices (flow switch) with the times and modes set.
- ON (with regulation) of the modulating valve, with possibility of selecting from parameter if initially all open -
with set opening/closed/modulating immediately. After a certain time following arrival at the flow
temperature, only the pump is active with unit and/or boiler OFF. A "valve activation delay time from pump
start" can be set with valve function modulating immediately on the basis of the flow temperature measured.
- Energy count solenoid valve ON (if present in the system).
- Remote consent ON (boiler-hp-chiller consent): the control will be treated at AUX level to control the other
sources present in the system (of which MCSA ignores type and composition) that produce hot or cold water.
On reaching environment temperature:
- Collector heads OFF: for zone temperature set-point reached or due to no zone request.
- Energy count solenoid valve OFF (if present in the system).
- OFF (regulation) of the modulating valve.
- OFF (remote consent) due to flow set-point reached or no request.
- Pump OFF.
On reaching the flow temperature, the zone circuit can also work in pump mode only: boiler stop (remote ON-OFF),
solenoid valve stop. Energy count valve, mixing valve in pump mode only, collectors pump and heads ON (the latter
are switched off when the environment temperature is satisfied). If the flow water temperature drops below the set
value in recirculation mode and the heating request remains, the sequence is re-started.
The same principles and sequences are used in heating and cooling modes and for dehumidification requests.