EVCO c-pro mega RACK - Manual (Page 90)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 90
6.6 Fan management
The program is capable of managing up to a maximum of 12 fans (8 if using C-PRO MEGA)
divided according to circuit. A digital input for safety devices and a digital output for switching
on/off may be associated with each fan.
The number of fans that can be used is further limited by the number of compressors (and stepped
compressors), i.e. the number of free digital outputs remaining after the compressors have been
configured.
By setting the relevant parameter, it is possible to use a unique condensation device, i.e. achieved
by means of a single circuit.
The fans are managed by means of a set Point and differential that can be set by means of a
parameter, and by reading a pressure value from the supply probe. Switching on/off is guaranteed
by a thermoregulation block and by certain time settings, protecting the various startup operations.
6.6.1 Fans per circuit
Depending on machine type, there are precise configurations relating to the fans to be used for each
circuit.
Single-circuit
All 12 (8 if using C-PRO MEGA) fans can be used without limitations. Indeed the circuit is unique.
Dual-circuit and triple-circuit
The sum of the fans used in the two/three circuits, including the inverters, must not exceed 12 (8 if
using C-PRO MEGA); which is the maximum number of fans managed by the program.
The digital outputs and inputs assigned to the fans and the corresponding operation alarms are
correctly assigned on the basis of the above guidelines.
In the case where it is decided to use condensation on a single circuit (Unique condensation
parameter) the only available and configurable fans will be those of the first circuit.
Please note. By enabling the inverter for fan regulation, the FIRST fan (for each circuit) will be the
one controlled by the inverter, while any other additional fans will be hermetic in nature and will
be controlled by digital outputs using relays.
6.6.2 Fan status
Each fan has an associated fan state, which identifies its relative status during system operation.
A fan can assume 7 different states:
1. Disabled: the fan has not been configured for the system. In this state, the user interface
displays the symbol “ - ”.
2.
Off: the fan is off. In this state, the user interface displays the message “OFF”.
3. Awaiting switch off: the fan is about to be switched off, and is currently waiting protective
device waiting times. In this state, the user interface flashes the message “WOFF”.