Daikin EKHH2E-AV3 Installation And User Manual page 19

The following illustration (Fig. 8) shows an example of a
water supply connection.
 Water inlet pipe;
 Shut-off valve;
 Automatic thermostat mixing equipment
 Heat pump
 Ricirculation pump
 Spring check valve
 Hot water outlet pipe
 Safety valve
 Inspectionable end of discharge pipe
 Drain tap
Expansion vessel
L Pressure regulator
M Pressure gauge
Fig. 8 – Example of the water supply system
Boiler connection
Fig. 8a – Example of heavy series safety valve
N.B.
It is compulsory to install a dirt filter on the cold
water inlet pipe. The equipment should not work
with water hardness lower than 12°F; on the
contrary, when the water hardness is particularly
high (higher than 25°F), it is recommended to use
a water softener, properly calibrated and
monitored; in this case the residual hardness
should not fall below 15°F.
Installation and user manual
Cold water inlet
Drain tap connection
PLEASE NOTE!
It is advisable for the system installer to install
a 7-bar safety valve on the cold water intake
pipe (Fig. 8a).
N.B.
The safety equipment for protection against
over pressure must be operated regularly in
order to remove limescale deposits and to
check that it is not blocked (Fig. 8a)
N.B.
For a proper installation of the equipment, a
hydraulic safety group in accordance to UNI
EN 1487:2002 standard should be provided. It
should include at least: a shut-off valve, a
check valve, a control device of the check
valve, a safety valve, a device to interrupt the
water load (Fig. 8a)
N.B.
The drain hose connected to the equipment
for overpressure protection must be installed
with a continuous downward slope (slope> 3
°) and in an area protected against the
formation of ice (Fig. 8)
WARNING!
In case an expansion vessel is not being
installed, make sure that in the cold water
intake there is not any non-return valve
installed.
WARNING!
The heat pump for the production of domestic
hot water is capable of heating water up to
more than 60°C. For this reason, as a
protection against burns, it is necessary to
install an automatic thermostat mixing
equipment to the hot water pipe (Fig. 8).
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