EVCO c-pro mega RACK - Manual (Page 93)

C-PRO MEGA RACK & C-PRO GIGA RACK APPLICATION MANUAL
Page 93
Neutral zone timings
These parameters are used to time the switching on and off requests for the various condensation
devices.
Minimum switch on/off request time - TOn/Off
For these parameters, please refer to the description given in section 2.5.2.
Protective device timings
These times are required to protect the fans from the various startup operations to which they are
subjected.
TOnOther – Minimum different fan switch on time (PF07). This establishes the minimum time that
must elapse before the subsequent fan can be switched on. If greater than zero, this allows avoiding
any simultaneous startup operations.
TOffOther – Minimum different fan switch off time (PF08). This establishes the minimum time that
must elapse before the subsequent fan can be switched off. If greater than zero, this allows avoiding
any simultaneous startup operations.
SpeedUp time. If regulation by means of inverter is set, then this parameter, if other than zero, keeps
the inverter output at maximum value (100.0%) each time another fan switch on is requested.
6.6.5 Safety device inputs
The program envisages the management of a single “fan thermal” safety device for each of the fans
configured within the application. Enabling or disabling this characteristic is managed by the
parameter enable fan safety device (PG08).
In order to enable the “fan thermal” alarms, besides setting the relevant parameter, it is also
essential to set the positions where the digital inputs pertaining to the various selected fans will be
connected, from within the System builder -> Hardware menu. Where there is no desire to set an
alarm, simply set the parameter to the value zero.
6.6.6 Inverter configuration
For each inverter used must be selected a position of the digital output for the command/consent to
the inverter start; for the configuration are used the same parameters of the fans digital ouputs,
parameters HF01..HF12. The inverter is virtually the first fan of each circuit, then, according to the
quantity of fans and the quantity of circuit must be set the correct parameter, according to this logic.
- 1 circuit: The inverter (if enabled) is virtually the fan 1; is necessary to configure the
first fan parameter, then must be configured always the parameter HF01.
- 2 circuits: The circuit 1 inverter (if enabled) is virtually the fan 1 (then, must be set
the parameter HF01), the circuit 2 inverter (if enabled) is virtually the first fan after
the circuit 1 fans
- 3 circuits: The circuit 1 inverter (if enabled) is virtually the fan 1 (then, must be set
the parameter HF01), the circuit 2 inverter (if enabled) is virtually the first fan after
the circuit 1 fans, the inverter of circuit 3 (if enabled) is virtually the first fan after
the circuit 1 and circuit 2 fans.
The selection of working modality and function setup of the parameters for the fans inverters is the
same for the compressors one, but are used the parameters PH21, HFxx (look at paragraph 6.4.8)