Evco c-pro 3 nano CHIL User Manual

EVCO S.p.A. c-pro 3 nano CHIL | Application manual ver. 1.0 | Code 144CP3NCHE104
page 54 of 90
PC42). The solenoid valve opens in the same instant the compressor starts up. To enable this function, you must set the following
parameters:
PC41 = 1. Enable function
PC42: Pump-down time
Note: In the event of an alarm, the system must ignore the compressor switch-off delay.
8.7.4 Relative Pump-down Threshold
If low pressure transducers are available, you can perform the pump-down procedure by leaving the compressor on just for the time
needed to properly discharge part of the coolant. At the end of the last compressor’s request to be turned on by the relevant
evaporator, the value of the evaporation pressure is memorised, the solenoid valve disabled, and when the value of the evaporation
pressure has dropped to the Pump-down pressure differential PC43, the compressor switches off.
In the event that the switch-off pressure threshold is not reached or if the evaporation probes don’t work, there is always a Compressor
switch-off delay in pump-down.
To enable this function, you must set the following parameters:
PC41 = 2. Enable function
PC42: Pump-down time
PC43: Pump-down differential
Note: In the event of an alarm, the system must ignore the compressor switch-off delay.
8.7.5 Protection Periods
The purpose of these periods is to protect the mechanical units from the different start-up voltages they are subjected to.
PC04 = Minimum compressor switch-on time. Once activated, a compressor must remain on for this time interval before being able to
be turned off again.
Ultima richiesta
compressore
Evap. P
Valvolasoleno
ide
Compressor
e
PC43
Differenziale
pressione
pump-down
PC42 Ritardo disabilitazione pump-down
t
t
t
t

Evco c-pro 3 nano CHIL Specifications

General

Brand	Evco
Model	c-pro 3 nano CHIL
Category	Controller
Language	English