EVCO c-pro mega RACK - Manual (Page 85)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 85
6.4.11 Refrigeration power incrementing at high pressures
In order to avoid tripping the condensation high pressure pressure-switch, with consequent blocking
of cold production, it is possible to reduce the refrigeration power and consequently the power to be
exchanged by the condenser, thus reducing condensation pressure. This reduction is only possible
with incrementable circuits (with at least two compressors or with one compressor with
incrementing devices).
The parameters pertaining to this function are as follows:
⋅
PC70 = Enable high pressure incrementing
⋅
PC71 = Condensation pressure-switch control setpoint limit (Circuit 1)
⋅
PC72 = Condensation pressure-switch control setpoint limit (Circuit 2)
⋅
PC73 = Condensation pressure-switch control setpoint limit (Circuit 3)
⋅
PC74 = Pressure-switch control differential
⋅
PC75 = Minimum pressure-switch increment maintenance time
⋅
PC76 = Percentage increment value
Supply
pressure
Set
Set-Diff
Increment
enabling
PC75 PC75
t
t