EVCO EPH4DXP1CT Installer manual - Manual (Page 69)

Evco S.p.A. c-pro 3 CLIMA sistema | Installer manual ver.1.1 | Code 144CP3CSE114
page 69 of 74
8.5.3 Management of the solar panels circuits circulation (MCPS
module)
The controller for the MCPS solar panels can manage up to 2 thermal solar panel circuits, each with relative circulation
pump.
The circulation pump is activated on temperature request of the DHW tank, whenever the conditions described in
previous paragraph 9.5.4. are satisfied.
As well as the request by the DHW tank, the solar panels circuits circulation pumps
will be activated for the following special cycles:
- periodic activation cycle for uniformity of temperatures
- solar panels circuits low temperature protection
- anti-stagnation emergency
- anti-grip cycle
The correct functioning of the circulation pumps is controlled via a digital input that can be configured as pump
protection input (thermal switch) or delivery flow switch (consult the relative explanatory paragraph).
8.5.4 Control of the high and low temperature of the solar panel
circuits (MCPS module)
Whenever the temperature of one of the solar panels circuits exceeds or drops below the minimum and maximum
temperature values accepted for the system of the hysteresis value, then the c-pro 3 hecto MCPS solar panels
regulator will start special management cycles for these emergencies:
- High temperature protection: after a fixed delay of 60 seconds, the high temperature protection intervention
will start an anti-stagnation emergency cycle (described in the following paragraph), in order to dispose of the
overheated water and to take the temperature of the water back within the system safety conditions.
- Low temperature protection: after a fixed delay of 60 seconds, the intervention of the low temperature
protection will cause the activation of the solar panels circuit circulation pump in order to ease heating of the
water in the circuit. The pump will remain on until the minimum temperature conditions are recovered.
8.5.5 Management and setting the stagnation emergency for solar
panels circuits (MCPS module)
Whenever the temperature of the water in one of the solar panels circuits exceeds the maximum temperature value
accepted for the system of the hysteresis value, then the regulator for c-pro 3 hecto MCPS solar panels will start a
special stagnation emergency cycle.
The emergency condition must remain at least for a fixed time of 60 seconds and will be managed in the following
way, according to the value set for the Stagnation emergency parameter:
- ON/OFF: the stagnation emergency will be managed via the activation of a solenoid vent valve, which will
dispose of the hot water.
The heat disposal relay will remain enabled until the temperature of the solar panels circuit has gone back
below the maximum temperature value accepted of the hysteresis value (differential).
As well as the heat disposal relay, the circulation pump of the corresponding solar panels circuit is activated
at the same.
- Cover1: the stagnation emergency will be managed by the opening of a motorised cover (servomotor with
spring return) which will cover the surface of the solar panels from solar exposure.
The cover opening relay will remain enabled until the temperature of the solar panels circuit has gone back
below the maximum temperature value accepted of the hysteresis value (differential).