Hydraulic System Connection - Daikin EKHWP300B Installation And Operating Instructions Manual

● Note tightening torque (see chapter 9.3 "Tightening
torque").
● Observe the requirements for the heating and filling water
(see chap. 2.4.4).
To prevent heat loss from the connection pipes when
the heating pump is switched off and during periods
when no domestic water is drawn off (gravity circu-
lation), you should fit circulation brakes (see
chap. 3.4.2) in the connections for the Daikin hot water storage
tank.

4.2.2 Hydraulic system connection

1. Only with connection of a EKHWP hot water storage tank to
a Daikin heat pump:
● Mount the storage tank kit "E-PAC" for the Daikin heat
pump to the EKHWP hot water storage tank (see the
individual installation and operating instructions included
for the storage tank connection kit).
2. When using circulation brakes, fit them into the pipe
connections on the Daikin EKHWP / EKHWC / EKHWD.
3. Connect the drain hose to the connector of the safety
overflow (fig. 3-1 to fig. 3-4, item 15) on the hot water storage
tank.
– Use transparent drain hose (draining water must be visi-
ble).
– Connect the drain hose to an adequately dimensioned
waste water installation.
– Drain should not be lockable.
Fig. 4-3 Installation of drain hose at safety overflow
4. Check the water pressure at the cold water connection
(<6 bar).

If the pressure in the domestic water supply is greater
then fit a pressure reducer and limit the water pressure to
<6 bar.
5. Establish connection of the cold water inlet to the hot water
storage tank (fig. 3-1 to fig. 3-4, item 25).
Daikin EKHWP/EKHWC/EKHWD
Daikin High-efficiency hot water storage tank
008.1618744 – 03/2017
4 x Set-up and installation
In order to be able to flush out the stainless steel corru-
gated heat exchanger for domestic hot water heating in
the event of bad water quality, install a removal facility
to each of the cold water and hot water connections on
the storage tank (T-piece with draw-off cock).
Above a hardness level of >3 mmol/l we recommend also fitting
a dirty water filter that can be back-flushed into the cold water
connection.
6. Connect the connections to the hot water distribution network
(fig. 3-1 to fig. 3-4, item 24).
7. Establish connections to the heating circuit.
You must always ensure proper de-aeration of the storage
tank lines (fig. 3-1 to fig. 3-4, items 26-29)
– EKHWC / EKHWD: Establish the drainage connection on
site.
– EKHWP: Use storage tank connection kit (E-PAC, see
price list).
8. Establish connections to the heat generator.
– EKHWC / EKHWD: Establish the connections to the heat
generator in accordance with the suitable system diagram
(chapter 7.1 "Connection diagrams").
– EKHWP: In combination with a Daikin heat pump, the
heating side connection of the hot water storage tank
must be carried out in accordance with the installation and
operating instructions of the respective storage tank con-
nection kit (E-PAC).
– With bivalent combustion, the connections need to be
carried out in accordance with the connection schematic
in the installation and operating instructions of the individ-
ual controllers.
– Optional: Create the connections to the solar system
(see solar installation and maintenance instructions).
9. Carefully lag the hot water pipes to prevent heat loss. Install
heat installation in accordance with country-specific
guidelines. Daikin recommends a lag thickness of at least
20 mm.
Installation and operating instructions
17