–22–
Hydro Unit
Installation Manual
EN
▼ Control parts specifications
▼ Output line specifications
▼ Input line specifications
Earthing arrangements
The Hydro Unit and related equipment must be earthed in accordance with your local and national electrical regulations.
It is essential that the equipment is earthed to prevent the electric shock and damage to the equipment.
Power Maximum current Type
Motorized 3-way valve
(for hot water)
AC 230 V 100 mA
Default: 2-wire spring return valve or 3 wire SPST valve
Note: 3 wire SPDT valve can be used by changing DIP switch
13_1.
Motorized 2-way valve
(for cooling)
AC 230 V 100 mA spring return type (normally open)
Motorized mixing valve
(for 2-zone)
AC 230 V 100 mA
Default: Drive time = 60sec to 90°
Note: 3 wire SPST or SPDT valves, with drive times between
30 and 240 seconds, can be used. Valve drive time can be
changed using function code 0C
Description Output
Maximum
current
Max
voltage
Maximum
length
External pump No.1 AC230 V 1 A – 12 m
External boost heater AC230 V 1 A – 12 m
Output as required when outdoor air
temperature is -20 °C or less
Boiler control
Non-voltage
contacts
0.5 A AC230 V 12 m Output as required when outdoor air
temperature is -10 °C or less. The
outdoor air temperature, when the
boiler output is enabled, can be
changed using function code 23.
1 A DC24 V 12 m
ALARM Output
Non-voltage
contacts
0.5 A AC230 V 12 m
1 A DC24 V 12 m
Compressor operation
output
Non-voltage
contacts
0.5 A AC230 V 12 m
1 A DC24 V 12 m
Defrost Output
Non-voltage
contacts
0.5 A AC230 V 12 m
1 A DC24 V 12 m
Description Input Maximum length
Emergency stop control Non-voltage 12 m
Cooling thermostat input Non-voltage 12 m
Heating thermostat input Non-voltage 12 m
22-EN
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