Hitachi AQUAFREE RWM-3FSN2E1 Manuel D'installation page 39

ELECTRICAL WIRING
14.3.5. DHW TIME CLOCK
It is necessary to connect an external time clock to the
AquaFREE to provide time of day switching of the DWHT
storage.
7 8
AquaFREE Unit
Timer input
14.3.6. TARIFF-SWITCHING DEVICE
If a tariff-switching device (load shedding management) is
provided by electricity utility, it can be used to prevent the heat
pump switching on (for heating & cooling space, swimming, and
DHWT (except if SW5.5=ON)), and the AquaFREE will use the
boiler instead to satisfy the heating requirements.
9 10
AquaFREE Unit
Tariff input
14.3.7. DHW ELECTRIC HEATER
If DHW Storage tank contains a electric heater, the AquaFREE
can enable it if the heat pump cannot achieve the required DHW
temperature itself.
11 12 AquaFREE Unit
DHW Electric
Heater
14.3.8. DHW VALVE
The AquaFREE can be use to heat DHWT, this output will be on
when DHWT activation
L N
15 16
AquaFREE Unit
DHW Valve
PMML138A_R1-eng-fre.indb 39
Open Circuit Closed Circuit
DHWT is Blocked DHWT is Enabled
Open Circuit Closed Circuit
AquaFREE is AquaFREE is
Enabled Blocked

NOTE:
- In case of HITACHI
Domestic Hot Water Tank
(DHWT200/300(E/S)-2.5H1E)
the Terminal connections of
tank will be terminals 3 and 4.
14.3.9. SWIMMING POOL VALVE
The AquaFREE can be use to heat Swimming pool, this output
will be on when Swimming pool activation
N L
14 15
AquaFREE Unit
Swimming
Pool Valve
14.3.10. BOILER OUTPUT
The boiler can be used when the heat pump cannot achieve the
required DHW temperature itself
17 18
AquaFREE Unit
Boiler
14.3.11. TEMPERATURE SENSORS
All sensors used are of type NTC 20K (at 25ºC)
19 20 21 22 23 24
AquaFREE Unit
Outdoor DHWT Swimming
sensor sensor pool sensor

NOTE:
- Be aware that DHWT sensor location must be installed at
lowest location of the tank's sensor probe pipe.
PMML0138A-rev.1 - 11/2009
39
19/11/2009 14:46:04