i-MAX Industrial inverter air/water heat pump with axial fans
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− If H10 = 2/4/6, the remote on-off function disenables the production of domestic hot water and also the operation of the
heat pump in heating and cooling on plant side.
9.5.1 MEMORIZATION OF THE SENSOR IN HEATING MODE
In the case of commutation from water users to the domestic hot water, the temperature sensor commutates from a "water
outlet temperature sensor" to a "water tank temperature sensor". For such reason, in heating mode, the last value read by the
sensor will be memorised before changing to DHW mode.
When the DHW thermoregulation is achieved, the reference temperature on the plant side will take the value which is previously
memorised.
The memory function will be interrupted:
- When the temperature detected by the sensor becomes lower than the memorized value;
- Or after a period equal to b06 seconds (default 45 seconds).
9.5.2 SANITARY MODE CALLING FROM DIGITAL INPUT
In the case where a digital input is configured for sanitary water mode call (instead of the sensor), the system will be placed in
sanitary mode when the digital input is closed (the same behaviour is obtained when DHW temperature sensor < (G03 – Pa b03)
and exits from the DHW production when the digital input is open.
Note: If a DHW temperature sensor is installed and configured, this management will be ignored and the thermoregulation will be
done according to the temperature detected by the sensor.
Sanitary calling from thermostat (ST6E).
Deactivation of DHW temperature sensor
In the case where a digital input is configured for sanitary water function calling (instead of the sensor), the heat pump will be
placed in sanitary mode when the digital input is closed and exits from the DHW production when the digital input is open.
The DHW setpoint of the heat pump is not considered here, its management is the designer’s responsibility, who must take into
consideration the DHW protection and the configuration of the whole system.
Note: It is possible to invert the polarity of the digital input, to do that, please contact our technical office.
9.5.3 HEATING MODE ON DOMESTIC HOT WATER TANK
If the following setting H83=1, the unit employs the tank of domestic hot water also for plant side heating. In these conditions,
therefore the relay which controls the DHW valve which will be energized during heating operation and not only in DHW mode.
During defrost period and in cooling mode the valve will be de-energized.
9.6 SUMMER/WINTER MODE ROMOTE COMMUTATION
With the possibility of controlling remotely the heating/cooling mode operation of the heat pump unit.
To enable this function, enter at the parameters PRGPSSPRG(introduce the maintainer password)PRGPAr PRGCnF
See paragraph See paragraph 11.2.
H57 Num 3
Digital input for operation mode management.
Open contact heat pump in ”heating” mode,
unit operates in “cooling” mode.
ID3E- ID3E
Voltage free digital
input
9.7 PLANT REMOTE SENSOR
In some plant solutions (e.g.: installed heat pump in parallel configuration with a boiler on the same hydronic circuit and diverter
valve) It is possible to enable a plant temperature sensor for allowing the on-board unit controller to correctly manage the
regulation.
To enable this function, enter at the parameters PRGPSSPRG(introduce the maintainer password)PRGPAr PRGCnF
Enablement of the plant remote temperature sensor
The plant circuit remote sensor adjusts the heat pump temperature only during the startup period of the compressor(s), the
shutdown is managed by the outlet temperature sensor of the heat pump. For more explanation herein below is reported an
illustrating table regarding the operation of the system:
Active call of the heat pump
Heating
Temperature detected by the outlet sensor of the heat pump < setpoint Hea - b05
and
Temperature detected by the plant circuit remote sensor < water setpoint Hea - (b22 - b05)
Cooling
Temperature detected by the outlet sensor of the heat pump > setpoint Coo + b05
and
Temperature detected by the plant circuit remote sensor > setpoint Coo + (b22 - b05)
Note: b05=1°C; b22=5°C.
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