12
START UP AND TESTING
Before starting up the unit, carry out all hydraulic, aeraulic and electric connections. Also make
sure chilled water is available and that there are no water leaks from the connections and unit.
The electronic card has a red led and a green led that show the general status of the unit.
The functions available through digital inputs are:
- current season;
- exchange with heat recovery (yes, no, automatic with time slots);
- dehumidification in summer;
- cooling in winter;
- heating in winter;
- free-cooling;
- attenuation of air flow rates versus normal settings;
The settings available on the keypad are:
- function activation (as an alternative to digital input);
- current time;
- current season (as an alternative to digital input);
- delivery and exchange air flow rates
- normal and integration delivery temperature for each season;
- time slots for automatic exchange (max 4);
- time slots for flow rate attenuation (max 4).
The operator can also read the values of the unit temperature sensors which are useful during
testing or when checking the correct operation. For more details, refer to the “CONTROL
PANEL” section of this manual.
When tension is available, the green led turns
on for about 90 seconds while the card
performs the controls. Then the red led turns
on to indicate that there is tension; the unit will
be ready to receive the control panel inputs
and perform the required functions.
NOTE: After 90 seconds from activation, the
green led is intended as the input sent to the
cooling compressor: if the led is solid, it means
the compressor is controlled when on; if the led
flashes, it means there is an operation input
but the compressor is not on yet, as it is
waiting for the start timer or there may be a
failure.
