CIAT Magister 2 Series, Установка, Эксплуатация, Пусконаладка, Обслуживание

Страница: 75 / 101

73
The related parameters are as follows:
P145: P coefficient
P146: I coefficient
P147: D coefficient P148: T coefficient (polling time)
P150: Minimum compensation setpoint
P151: Compensation time
16.4 Adjustment of setpoint for the water supply and return temperatures (P141 = 1 or 2) if P7 = I
NVERTER
The difference between the control temperature the setpoint is compared to the stage differential and the interstage differential. Depending on
the result, it will be necessary to either turn on the compressor and increase its speed or to decrease its speed and turn it off.

In cooling mode
- A call will be made to turn on the compressor if: T > STP + Stage differential
- The compressor rotation speed will be progressively increased if (STP + Stage differential) < T < (STP + Stage differential + Interstage
differential)
Conversely, the compressor speed will be progressively decreased as the water return temperature approaches the setpoint value.
- The compressor will be shut off when T < STP

In heating mode
- A call will be made to turn on the compressor if T < STP + Stage differential
- The compressor rotation speed will be progressively increased if (STP - Stage differential - Interstage differential) < T < (STP - Stage
differential)
- The compressor will be shut off as soon as T > STP
Conversely, the compressor speed will be progressively decreased as the water return temperature approaches the setpoint value
The temperature used to adjust the setpoint is measured by the sensor on the water outlet or inlet of the heat exchanger based on the value of
P141.

In cooling mode:

In heating mode:

Correction management:
Correction is enabled if P7 = Inverter and if P141 = supply and return.
The correction factor is used to prevent the compressor from running during short-cycle protection and too-short runtimes caused by a lack of
inertia in the system.
The correction factor On/Off button is set to
„0‟ at power-up.
S U P P L Y T E M P . : - x x . x °
S E T P O I N T : - x x . x °
Corrected slope
Corrected slope
Csg = STP
Csg = STP