EVCO S.p.A.
Vcolor 679/689
| Installer manual ver. 1.0 | Code 144VC679E104
page
40
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70
10.3.1
EVDFAN1 module management (only for the Vcolor 679 version with PWM):
To adapt the phase-cutting regulation (T.D.F.) to all types of 230 Vac single-phase motors, a manual evaporator fan calibration
procedure is recommended.
1.
Set F23 at 0% and F24 at 100%.
2.
Carry out a manual cycle and vary the fan speed, check the minimum percentage below which the fan switches off and
the maximum percentage above which the fan runs at maximum.
3.
Set these values for F23 and F24 respectively.
10.3.2
Management by EVCO inverter
The evaporator fans are managed in modulating mode by the EVCO inverter which can be integrated via the RS-485 serial port. The
connected inverter can be replaced by a different model or version at any time.
The controller can automatically detect the presence of an EVCO inverter. By setting parameter E10=2 (or E10=3 if there is also a relay
expansion) and E7=2, the system starts up again on the HOME page.
The parameters relating to the inverter can be set from the page SERVICE – PARAMETERS – INVERTER CONFIGURATION.
Similarly to what happens in the phase cutting management mode (E7=3), up to 10 speeds can be selected for the evaporator fans
when managed by the inverter. In this case, the 10 steps are set by parameters F27 - F36 (from speed 1 to speed 10 respectively) at
the discretion of the user and the speeds are expressed as a percentage of the interval between the maximum speed of the motor in
RPM (S204) and the minimum speed of the motor in RPM (S205).
Below is the formula for determining speed 1, for example: S205 + [(S204-S205)*(value of parameter F27)]/100
10.4
Defrost management (for retarding-proofing only)
Defrost is active during the automatic BLOCKING and HOLDING phases and during the MANUAL COOLING phase and it can be either
automatic (time intervals) or manual. Manual defrost is activated by accessing the
menu from the On/Stand-by screen or during a
cycle in progress.
Depending on the value of parameter d1, the machine will perform either electric or hot gas defrost cycles or when the compressor
stops.
If the evaporator probe is enabled (parameter P3=1), the defrost will end when it reaches the end-of-defrost temperature (parameter
d2) within a maximum time interval set by parameter d3. If the evaporator probe is not enabled (P3=0) or if it is out of order, defrost
will end at the time set by parameter d3.
At the end of a defrost cycle, the controller will allocate a drip time (d7) during which all the regulation outputs will be switched off.
When the dripping time finishes, the refrigeration plant will begin working again but activation of the evaporator fan will be further
delayed by the time set by parameter F12.
If a hot gas defrost is being carried out, in order for the defrost to start, the compressor must be activated for at least the time set by
parameter d15.
If type “B” defrost is enabled (parameter d00), traditional defrost is carried out alongside another defrost mode which is activated
according to the cabinet setpoint (see parameter d01).
10.5
Heater management
When heat is required, the heater output will be activated, also making it possible to manage a switch-on and off duty cycle controlled
by parameters rH6 and rH7.
10.5.1
Cabinet step heating management
The required setpoint in the re-awakening and proofing phases can be reached gradually, setting the number of steps for reaching the
setpoint and the setpoint percentage increase for each step.
In the re-awakening phase, the number of steps is set by parameter rr0, while the setpoint percentage increases are set by parameters
rr1 - rr10.
In the proofing phase, the number of steps is set by parameter rL0, while the setpoint percentage increases are set by parameters rL1 -
rL10.
N.B.:
the user is required to check the consistency of the number of steps set and the correct number of setpoint percentage
increases. E.g. if rr0 equals 4, only parameters from rr1 to rr4 should be set.
N.B.:
if the setpoint is changed while the cycle is in progress, the steps are disabled.
