EVCO S.p.A.
Vcolor 869
| Installer manual ver. 1.0 | Code 144VC869E104
page 58 of 92
11
ADJUSTMENTS
11.1
Door frame heating output
This function is only available if one of the relays is configured as door frame heating.
This function is activated automatically when the board is in “on” or “run” mode and the cabinet temperature falls
below the value set by parameter u5 minus the fixed hysteresis of 2°C (4°F). The output is deactivated when the
temperature rises above the u5 setting.
If there is a cabinet probe error, the heaters are not activated, or if already on, they are deactivated.
11.2
Compressor management
This function is only available if one of the relays is configured as compressor.
The management of the compressor varies according to the cycle activated, as specified below.
Blast chilling, blast-freezing, pre-cooling, conservation, ice cream hardening, sanitation
The compressor is activated if the cabinet temperature is above the set point for the type of cycle underway + the
hysteresis set by parameter r0. It is deactivated when the temperature falls below the set point for the phase
underway.
The compressor must be switched on and off according to the safety periods set by parameters C0, C2 and C3. The
drip periods must also be complied with if it is activated after a defrost cycle.
When the compressor is set to switch off, the pump down solenoid valve is first deactivated and once the delay set by
parameter u12 has elapsed, the compressor will also switch off.
If there is a fault with the cabinet probe during a conservation cycle, the compressor is activated on a cyclical basis
according to the values of parameters C4 and C5 if this is a conservation phase following blast chilling, or according to
the values of parameters C4 and C9 for conservation following blast-freezing.
Defrosting
During defrosting the compressor status depends on the value of parameter d1. If d1 equals 0, 2 or 3, the compressor
is switched off.
If d1 equals 1, the compressor will remain switched on for the entire duration of the defrost cycle and if it is switched
off when the defrost cycle is selected, it will be switched on for the period set by parameter d15 before defrosting
starts. When defrosting is finished the compressor remains off for the period set by parameter d7.
If parameter d16 is set to a value other than 0, when a hot gas defrost cycle starts the compressor remains off for the
pre-drip time set by parameter d16.
Proofing
The compressor is managed according to the neutral zone adjustment together with the heaters.
It is activated when the temperature rises above the neutral zone relative threshold (cooling). It remains active until
the temperature drops within the neutral zone value.
Slow cooking
The compressor is always switched off.
