Evco c-pro nano CHIL Manual de usuario descargar pdf (Pagina 106)

C-PRO NANO CHIL AND C-PRO MICRO CHIL – APPLICATION MANUAL

Pag. 106

pressure value is stored, the fluid solenoid valve is disabled, and, once the evaporation pressure

value has fallen by the Pump-down pressure differential PC43, the compressor is switched OFF.

Anyway, there is always the Compressor switch-OFF delay in pump-down, should the switch-OFF

pressure threshold not be reached, or should evaporation probes be faulty.

In order to enable this function, the following parameters must be set:

- PC41 = 2: Function enable

- PC42: Pump-down time

- PC43: Pump-down differential

- HA07: Position of solenoid valve digital output, Circuit # 1

- HA08: Position of solenoid valve digital output, Circuit # 2

- PH44 = 4: Enabling of evaporation probe, Circuit # 1

- PH45 = 2: Enabling of evaporation probe, Circuit # 2

Note: In case of alarm, the system must ignore the compressor shutdown delay.

6.6.5 Protection timings

There now follows a list of all timings connected with the management of compressors.

Protection timings

The purpose of these timings is that of protecting mechanical units from the various start-up stresses

to which they are subjected.

Last

compressor

request

Evap. P

Solenoid

valve

Compressor

PC43

Pump-down

pressure

differential

PC42 Pump-down disable delay

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 151 152

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Evco c-pro nano CHIL Manual de usuario Pagina 106