Daikin EKHH2E200AAV3 Installation And User Manual page 18

The following illustration (Fig. 8) shows an example of a
water supply connection.
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

alv
ola
 Water inlet pipe;
 Shut-off valve;
 Automatic thermostat mixing equipment
 Heat pump
 Ricirculation pump
 Spring check valve
 Hot w ater outlet pipe
 Safety valve
 Inspectionable end of discharge pipe
 Drain tap
Expansion vessel
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.
PLEASE NOTE!
It is advisable for the system installer to install a 7-
bar safety valve on the cold water intake pipe (Fig.
8a).
Page 18
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Cold water inlet
Drain tap connection
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 pipe connected to the equipment for
protection against overpressure must be installed
sloping continuously downwards and in a place
where it is protected against the formation of ice
(Fig. 8a)
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).
Installation and user manual