MAXA i-32V5C MIDI 0121 - System Venting; Compressor On;Off Logic; Regulation in Cooling Mode

Controllo per i-32V5 MIDI Air/water inverter chillers and heat pumps with axial fans
14
PROPORTIONAL REGULATION
ΔT
[°C]
Speed
[%]
P07
P08
P06/P09
P10
In pracce, in cooling mode, if the temperature dierence between the inlet and outlet is greater than P09 + P10, the circulator runs at maximum
speed, but if the dierence is less than P09 - 0.2°C, it runs at minimum speed; in the remaining cases, the pump modulates the speed propor-
onally. In heang mode, the same consideraons apply, replacing parameter P06 with parameter P09.
In sanitary producon the circulator always runs at maximum speed.
SYSTEM VENTING
The control allows the use of a manual system venng funcon with the circulator at maximum speed.
To enable the funcon the operaons to follow are:
• Set unit to OFF
• Access with maintenance privilege PRG -> PSS -> PRG -> (enter installer password) -> PRG
• Press UP and DOWN simultaneously for 3 seconds.
It is possible to exit the system venng cycle manually by pressing the MODE/ESC buon,or by pressing UP and DOWN keys simultaneously for
3 seconds.

water inside the system.
9. COMPRESSOR ON/OFF LOGIC
The restart of compressors is in operaon of a set point refered to the inlet and outlet water temperature. It is based on calculaon of  that
is the dierence between outlet and inlet water temperatures, detected while the compressor for thermoregulaon is turning o.
REGULATION IN COOLING MODE
• Tw,out,set = setpoint in cooling mode
•  = Tw,out,set – Tw,in,set
• b05 = compressor delta cut-o set = 0,2°C (default)
• b25 = delta cut-on regolazione compressor set = 2°C
RPM
Tw,out (outlet water temp.)
Tw,out,set
HzMaxReg
OFF
HzMin
b05
∆T,set + b25