MAXA i-2V514T, Manual

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i-32V5
Pompe di calore inverter aria/acqua con ventilatori assiali
26
control.
10.13 COMPRESSOR CRANKCASE HEATER
The crankcase heater is activated if the compressor has been off for at least 30 minutes and if the discharge temperature is below a certain
threshold of 20 °C (with hysteresis of 2.0°C). The crankcase heater is disabled when the compressor starts back up.
10.14 DOUBLE SET-POINT
This function introduces a second working set-point on the plant side, both in cooling and heating mode.
The user terminal board allows a consent to be connected to switch from the first to the second set-point and configured at digital input DI9 with
parameter H53 = 26 . The valve, on the other hand, is connected in the terminal board to digital output DO7 and is configured via parameter H85 .
Parameter VALUE Function
H53
26 Second set-point call
H85
25 3-way valve for radiant panels
H129
0 Function disabled (default)
1 Function configured but not active
2 Enabled only in cooling mode
3 Enabled only in heating mode
4 Enabled in cooling and heating mode
H138
0 DHW second setpoint function disabled (default)
1 Enabled the second DHW set point in cooling mode
2 Enabled the second DHW set point in heating mode
3 Enabled the second DHW set point in cooling and heating mode
10.15 MINIMUM HZ FUNCTIONALITY
Configuring parameter L02=1 and L03≠0 reduces the nominal operating Hz of the compressor.
Parameter VALUE Function
L02
0 Function not active
1 Enabling minimum Hz
L03
0 Function not active
1 Function active only in cooling mode
2 Function active only in heating mode
3 Function active only in sanitary mode
4 Function active in cooling and sanitary mode
5 Function active in heating and sanitary mode
6 Function active in cooling and heating mode
7 Function always active
With the function active, the output and power of the unit are limited, for additional information see the installer user manual.
Configuring a digital input DI9 with parameter H53=21, the function can be managed.
Parameter VALUE Function
H53
0 (default) Function disabled
21
Open contact -> standard mode
Closed contact -> mode Hz min/max
10.16 MAXIMUM HZ FUNCTIONALITY
Activating the function increases the power of the unit, please contact us for information.
10.17 FLOWMETER
It is possible to connect a ratiometric flowmeter to CN7 terminals of the controller respecting the table below:
Connector PIN 1 PIN 2 PIN3
CN7
GND Voltage input +5V
Terminal block
X-22.1 X-22.2
Connect it directly to pin 3 of CN7
of the controller
Enable the parameter H22=45 (configuration ST11).
I/O Resource - Parameter Value Function
H22 45 Water flow