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CONTROL
4.8.3 Fast DHW Operation
Fast DHW operation is used to quickly fulfil a requirement for domestic hot water when DHW priority has been set on
the user interface. Refer to installation manual of SPHERA EVO 2.0, Part 10 “Control”.
Component
Refer to wiring
diagram
Control functions and states
DC inverter compressor COMP Controlled according to load requirement
Fan FAN
Controlled according to outdoor heat exchanger
temperature
Electronic expansion valve EXV
Position (steps) from 0 (fully closed) to 480
(fully open), controlled according to discharge
overheating
4-way valve STF*/STF1** On
* Single-phase version
** Three-phase version
4.8.4 2-area control
The 2-area control function is used to control the temperature of each area separately.
In cooling mode, when the set temperature is reached in one of the two areas, the area pump switches o.
The same thing happens in heating mode, with the addition of the control function of the 3-way mixing valve (SV3)
which is activated to control the water temperature in the low temperature area.
The 3-way mixing valve (SV3) will only turn on when the control of the 2 areas is activated.
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