EVCO EPU2LXP1CH Installer manual - Manual (Page 81)

EVCO S.p.A. c-pro 3 micro CHIL | Application manual ver. 1.0 | Codice 144CP3CHE104
page 81 of 120
8.21 Manual operation
The program allows the setting of manual operation for compressors, fans and pumps. In this condition, devices are not involved in
rotations, nor in thermo control calculations, although they do remain sensitive to any alarms.
Manual operation of devices proves useful when functional tests are to be carried out on the machine, to ascertain its integrity and
correct functioning.
8.21.1 Compressors
Manual operation of compressors is guaranteed by parameter Compressor enable PM1x:
If set to Auto, it defines the normal behavior of the device;
If set to Manu, it disables the compressor, switching it to manual operation.
A compressor in manual operation mode does not take part in controls, and can be forced in its number of steps that it can provide, by
acting on the property Compressor forcing PM2x (present in the MAin->MAnumenu).
As already previously mentioned, however, the compressor remains sensitive to any alarms and related consequences.
In order to bring the compressor back to normal operation, parameter Compressor enable PM1x must be re-set to Auto (Automatic)
value; otherwise, the compressor in question would continue to operate manually, thus failing to comply with any start/stop requests
calculated by the configured control.
8.21.2 Fans
Manual or automatic operation of the two condensing fans and free-cooling dedicated fan is guaranteed by parameters PM51 (Circuit #
1) , PM52 (Circuit # 2) and PM65 (Free-Cooling Fan):
• If set to Auto, it defines the normal behavior of the device;
• If set to Manu, it disables the fan, switching it to manual operation.
A manually-operated fan does not take part in controls, and can be forced ON/OFF acting on parameters PM63,PM64,PM67 and
modulation acting on parameters PM61 ,PM62 and PM66.
As already previously mentioned, however, the fan remains sensitive to any alarms and related consequences.
In order to bring the fan back to normal operation, parameter PM51/PM52/PM65 must be re-set to “A” (Automatic) value; otherwise,
the fan in question would continue to operate manually, thus failing to comply with any start/stop requests calculated by the
configured control.
8.21.3 Pumps
Manual or automatic operation of the circulating pump and source pumps is guaranteed by parameters PM35(Pump# 1) , PM36 (Pump#
2) and PM45 (Source Pump# 1) , PM46 (Source Pump# 2):
• If set to Auto, it defines the normal behavior of the device;
• If set to Manu, it disables the fan, switching it to manual operation.
A manually-operated pump does not take part in controls, and can be forced ON/OFF acting on parameters PM37, PM38 and on
parameters PM47, PM48 for source pumps.
As already previously mentioned, however, the pump remains sensitive to any alarms and related consequences.
In order to bring the pump back to normal operation, parameter PM35/PM36/PM45/PM56 must be re-set to “A” (Automatic) value;
otherwise, the pump in question would continue to operate manually, thus failing to comply with any start/stop requests calculated by
the configured control.