MAXA i-32V5C MIDI 0121, Manual

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Controllo per i-32V5 MIDI
Air/water inverter chillers and heat pumps with axial fans
16
Parameter VALUE Function
H10
0 (default) Function disabled
1
Function active in heating and cooling mode.
The remote on/off function does not disable DHW production.
2
Function active in heating and cooling mode.
The remote on/off function disables DHW production.
3
Function active only in heating mode
The remote on/off function disable DHW production.
4
Function active only in heating mode
The remote on/off function disable DHW production
5
Function active only in cooling mode
The remote on/off function not disable DHW production
6
Function active only in cooling mode
The remote on/off not disable DHW production
If the DHW temperature is lower than the DHW set (set to 48°C by default), the machine activates the DHW valve and the compressor is set to
the maximum frequency, starting the modulation one degree before the set and switching off one degree after the set. Once the set point has
been reached, the valve returns to rest mode and the compressor starts to regulate normally. Switching from winter operation to domestic hot
water operation, the compressor does not switch off, while switching from summer operation to domestic hot water operation the compressor
is switched off to wait for the safety time.
If H10 = 1/2/3, switching the unit off remotely (remote on/off, see paragraph 13.1) does not affect the DHW operation
If H10 = 2/4/6, the remote on/off function disables domestic hot water production and operation of the unit in heating or cooling mode.
NOTE: defrosting during winter operation is always performed on the user side, never on the domestic hot water tank.
12.1.1 MEMORISING THE PROBE IN HEATING MODE
When switching from the system to DHW, the reference probe changes from "water outlet probe" to "DHW probe". The display on the machine
shows the temperature read by the probe located inside the DHW tank; once the DHW cycle is over, the display returns to show the water outlet
temperature. In heating mode, before entering DHW mode, the last value read by the flow probe of the heat pump is memorised. Once the DHW
temperature control is satisfied, the reference temperature on the system side returns to the previously memorised one.
La funzione di memoria si interrompe:
• when the temperature read by the probe becomes lower than the stored value;
• or a time equal to b06 seconds has elapsed (default b06 = 45).
12.1.2 HEATING MODE ON DHW STORAGE TANK
If parameter H130 = 1, the machine also uses the DHW storage tank for heating on the system side. Under these conditions, the DHW valve
output is also active during hot operation. The valve is deactivated during defrosting and in cold mode. In this mode (H130 = 1) it is possible to
make the domestic hot water integration resistor also act as integration resistor on the system side.le to make the DHW integration resistor also
act as an integration resistor on the plant side.
13. REMOTE FUNCTION
The terminal block has digital inputs to control the unit via an external consent (see chapter "5. SYSTEM RESOURCES").
13.1 ON/OFF
The function is enabled by default on digital input DI3 (parameter H47 = 2 ), to activate it, the electrical bridge must be removed from the terminal
block. With the contact open, the unit will be in stand-by mode, in this state the message E00 will appear on the display on the machine. When
the contact is closed, the machine comes out of stand-by and the circulator is activated for 2 minutes.
The function is disabled by reinserting the electrical bridge or setting parameter H47 = 0.
NOTE: If the remote off command is activated during defrosting, the unit finishes defrosting and then switches to OFF mode.
13.2 SUMMER/WINTER MODE CHANGE
The control offers the possibility to remotely manage the operating mode of the machine in heating or cooling mode.
The function can be set on digital input is settable DI2 via parameter H46 :
Parameter VALUE Function
H46
0 (default) Function disabled
3
Open contact -> cooling mode
Clesd contact -> heating mode
The polarity of the digital input DI2 can be reversed by setting H75 = 2.