EVCO S.p.A.
Vcolor 679/689
| Installer manual ver. 1.0 | Code 144VC679E104
page
42
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70
10.8
Dehumidification management
Dehumidification management is only active when humidity is managed by a humidity probe/transducer (rU0 = 0).
Dehumidification can be managed in the first mode described below when configuring proofing and in both modes when configuring
retarding-proofing:
-
using an extraction fan with “uxc=15” (in this case parameter “u3” will not be considered, irrespective of the assigned value);
-
by activating the refrigeration plant (compressor and pump-down solenoid valve if fitted) with “u3 = 1” and “uxc ≠ 15”.
Dehumidification management is deactivated with “u3 = 0” and “uxc ≠ 16”.
10.8.1
Extractor fan/dehumidifier management
When managed by an extractor fan/dehumidifier, the output will be activated when the humidity rises above the dehumidification
neutral zone value (rU6) plus the differential value (rU5) and it is deactivated when the humidity returns to within the dehumidification
neutral zone value.
10.8.2
Management by refrigeration plant activation
(for retarding-proofing only)
When pump-down solenoid valve management is not enabled, the output will be activated when the humidity rises above the
dehumidification neutral zone value (rU6) plus the differential value (rU5) and it is deactivated when the humidity returns to within the
dehumidification neutral zone value.
If, however, pump-down solenoid valve management is enabled, there will be a first attempt at dehumidification by activating the
pump-down solenoid valve (to make use of the high pressure generated when the compressor is switched off), for a time period set by
rU7. After this time has elapsed, the compressor output will be activated.
Once the humidity returns to within the dehumidification neutral zone value, the pump-down solenoid valve will be deactivated, after
which the compressor will be deactivated by the pump-down algorithm.
10.9
Condenser fan management (for retarding-proofing only)
The condenser fan is managed by assigning a value of “3” to one of the relay outputs.
If the condenser probe is enabled (see parameters Pr1, Pr2, Pr3), the condenser fan will be activated when the condenser temperature
rises above the value of parameter F16 plus the differential value (F16 + 2.0 °C / 4 °F), based on the configuration of parameter F18.
The condenser fan will switch off when the condenser temperature falls below the value of parameter F16.
If the condenser probe is not configured, the condenser fan will be activated in parallel with the compressor, while deactivation will be
delayed for the time set by parameter F17.
During CONDENSER OVERHEAT or COMPRESSOR LOCKED alarm, the condenser fan will stay on.
The fans will be switched off during defrost.
10.10
Cabinet light management
The cabinet light will switch on/off if the door is opened or closed, if the
key is pressed while manual and/or automatic cycles are
being carried out or if the controller is in the Stand-by screen.
Switching on with the key has priority over the door switch.
If the light is off, opening and closing the door will activate and deactivate the relative output.
If the light has been switched on with the key, opening or closing the door will have no effect on the light (the light will stay on until it
is switched off from the key or the controller is put in in stand-by).
10.11
Door frame management (for retarding-proofing only)
The door frame heater output, if configured, is activated when the cabinet temperature goes below parameter u5; it is deactivated
when the cabinet temperature is higher than u5+rC0.
10.12
On/stand-by relay configuration
This output does not depend on any regulation; it is activated when the controller is ON and deactivated when the controller is in
STAND-BY.
10.13
Output testing
The password to enter this mode is -19.
In this mode, all the outputs (digital and analogue) in the controller can be manually activated/deactivated independently of the
regulation in progress. Every output can be activated/deactivated individually.