Ref.
Description
K2
Main relay for electric heater EH1
K3
Safety device for electric heater EH2
K4
Main relay for electric heater EH2
K5
Output (3A 250Vac) for domestic hot water accumulation electric heater relay**
M
Domestic hot water compressor motor
P1
Main pump
P2
Domestic hot water pump
PWM
Main pump speed signal output
Q P G
External unit communication port
T1
Main exchanger inlet water temperature probe
T2
Main exchanger outlet water temperature probe
T5
Domestic hot water compressor delivery temperature probe
T6
Domestic hot water condenser temperature probe
T7
Domestic hot water evaporator temperature probe
T8
Solar thermal system water temperature probe
TA
Thermostat remote control input (use free contact, close on L to activate)
TC
Domestic hot water compressor thermal protector
TS1
Electric heater EH1 safety thermostat
TS2
Electric heater EH2 safety thermostat
USB1
Power board software update USB input
USB2
Display board software update USB input
X1
Terminal for field lines connections
X2
Terminal for power supply connection*
X3
Terminal for auxiliary electric heaters power supply connection*
* Add an interruption circuit compliant with the local laws
** Output K5 cannot be connected directly to the heater, add an external relay with appropriate
electrical specifications.
The function Smart Grid is not available at the moment.
4 - INSTALLATION CHECKS
4.1 - PREPARATION FOR FIRST COMMISSIONING
The first commissioning of the air-water heat pump must be carried out by qualified technical
personnel.
EN - 21
AQUADUE BIG