EVCO c-pro mega RACK - Manual (Page 69)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 69
The same wizard also sets the number of compressors and fans for each circuit, the presence of an
inverter, compressors and fans, the number of increments and compressor safety devices and
enables fan safety devices.
Note: Enabling the inverter for the compressors regulation, the FIRST compressor will be that
commanded by the inverter, the other following compressors will be hermetic type (without
capacity stages) and will be commanded by a relay digital output.
Likewise, enabling the inverter for the fans regulation, the FIRST fan will be that commanded by
the inverter, the other following fans will be commanded by a relay digital output.
For each inverter in necessary to configure the digital outputs position for the consent at device
activation.
6.2 Machine and individual circuit status
There are several procedures for switching the unit or individual circuits on/off:
1) Using the relevant On/Off key (parameter enabled function)
Machine/circuit on: press and hold the relevant key for approx. 2 seconds: if all other
enabled conditions are present, the machine or individual circuit will be switched “ON”.
Machine/circuit off: press and hold the relevant key for approx. 2 seconds: the machine or
individual circuit will be switched “OFF”.
2) Using the digital input On/Off command (parameter enabled function)
Machine/circuit on: close the remote On/Off contact: if all other enabled conditions are
present, the machine or individual circuit will be switched “ON”.
Machine/circuit off: if the remote On/Off contact is open, the machine or individual circuit
is switched “OFF by digital input” (indicated by the wording “OFF_D” for the individual
circuit status).
3) By means of the supervision protocol (parameter enabled function)
Machine/circuit on: activate the on state by means of the protocol: if all other enabled
conditions are present, the machine or individual circuit will be switched “ON”.
Machine/circuit off: if the on state is deactivated from the protocol, the machine or
individual circuit is switched “OFF by supervision protocol” (indicated by the wording
“OFF_S” for the individual circuit status).
The status of “On/Off by key” overrides the other two, indeed, the “On/Off by digital input and
supervision protocol” statuses can only be achieved when the machine is switched on using the
appropriate key.
A machine that is switched off by digital input can:
⋅
be switched to the OFF status by key (by pressing the ESC key).
⋅
be switched to the OFF by supervisor state if fulfilling the “OFF by digital input”
conditions, and the “OFF by supervisor” status is set.
⋅
be switched to the ON state if fulfilling the “OFF by digital input” conditions, and the “OFF
by supervisor” status is not set.
A machine that is switched off by supervision protocol can:
⋅
be switched to the OFF status by key (by pressing the ESC key).
⋅
be switched to the “OFF by digital input state” if fulfilling the “OFF by supervisor”
conditions, and the “OFF by digital input” status is tripped.