MAXA i-32V5C MIDI 0121, Manual

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13
Controllo per i-32V5 MIDI
Air/water inverter chillers and heat pumps with axial fans
NOTE:
The circulator switches off immediately in case of a pump blockage alarm, including a manual reset flow switch alarm
The circulator remains on with automatic reset flow switch alarm even if the compressor is switched off.
The circulator is always switched on if the anti-freeze resistors are operating or if the anti-freeze hydraulic pump operation is
activated.
8.1 CONTINUOUS OPERATION
The factory configuration of the unit is for continuous operation (P03 = 0). In this mode, the circulator is only switched off with the unit in OFF,
in all other cases it is on. When the unit goes into stand-by, the circulator is switched off with a delay that can be set by parameter P02 in tenths
of a minute (default P02 = 20, i.e. 2 minutes).
8.2 OPERATION ON CALL BY TEMPERATURE CONTROLLER
Subsequently, the compressor is also switched on, after a delay time of P01 seconds (default P01 = 30) since the pump was switched on. In the
switch-off phase, the pump is switched off with a delay time of P02 minutes (default P02 = 2) from the switch-off of the compressor.
OPERATION ON CALL FROM TEMPERATURE CONTROLLER
Temperature controller
ON
OFF
�me
Compressor
�me
Pump
�me
P01 P02
ON
OFF
ON
OFF
8.3 OPERATING ON CALL BY TEMPERATURE CONTROLLER WITH PERIODIC ACTIVATION
With P03 = 1, you can also configure the circulator to run periodically according to the following parameters:
•
P16
= Periodic activation time interval (in minutes)
• P17 = Pump activation time (in seconds)
In practice, when the pump is turned off for satisfied thermoregulation, the countdown defined by parameter P16 begins and at each interval of
time P16 the circulator is turned on for a time equal to P17 seconds.
The function is disabled with P17 = 0 (default). The periodic function is suspended in the case of antifreeze mode intervention.
8.4 OPERATION WITH INTEGRATION RESISTOR ACTIVE
If parameter r33 > 0, the circulator can also be switched on when the system and/or sanitary heating element is activated.
8.5 ANTIFREEZE HYDRAULIC PUMP OPERATION
In this mode, the circulator is always on. Antifreeze operation is enabled if the control temperature falls below P04 (default P04 = 5.0°C), it is
disabled if the control temperature rises above P04 + P05 °C (default P05 = 2.0°C).
8.5.1 PROPORTIONAL REGULATION
In cooling or heating mode, the speed of circulator changes depending on the temperature difference between the inlet water and outlet water
of the heat exchanger according to the diagram below, where:
• P06 = Set ΔT water inlet/outlet in heating mode (default P06 = 4,0°C)
•
P07
= Maximum speed (100%)
• P08 = Minimum speed
• P09 = Set ΔT water inlet/outlet in cooling mode (default P09 = 2,0°C)
• P10 = Modulating pump Delta (default P10 = 3,0°C)