Daikin EKHWP300B [15/36] Buffer tank
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Daikin EKHWP300B [15/36] Buffer tank

Daikin EKHWP300B [15/36] Buffer tank
3 Set-up and installation
Installation and operating manual
15
EKHW(D/C/P)(300/500)(P)B
Daikin Altherma ST (Hot water storage tank)
008.1633099_00 – 06/2020
INFORMATION
In order to be able to flush out the stainless steel
corrugated 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 backflushed into the
cold water connection.
6 Connect the connections to the hot water distribution network
(" 2‒2 500l models"[48] to " 2‒5 300l P‑models"[411],
itemx).
7 Establish connections to the heating circuit.
You must always ensure proper de-aeration of the storage tank lines
(" 2‒2 500 l models" [4 8] to " 2‒5 300 l P‑models" [4 11],
itemsz-ae)
▪ EKHWD/EKHWC: De-aerating connection to be connected by
customer.
▪ EKHWP: Use storage tank connection kit (E-Pac, see price list).
8 Establish connections to the heat generator.
▪ EKHWD/EKHWC: Create the connections to the heat generator
in accordance with the suitable plant schematic
("6.1Connection schemata"[420].)
▪ EKHWP: In combination with a 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 individual storage tank connection 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 individual
controllers.
▪ Optional: Create the connections to the solar system (see
solar installation and maintenance instructions).
9 Insulate the hot water pipes carefully against heat loss. Install
heat installation in accordance with country-specific guidelines.
We recommend an insulation thickness of at least 20mm.
3.3 Filling / Topping up
INFORMATION
Any optional accessories must be fitted before filling.
INFORMATION
The heat exchangers must be filled before the buffer
storage tank.
3.3.1 Hot water-heat exchanger
1 Open the shutoff valve for the cold water supply pipe.
2 Open the hot water tap connections so that the draw-off volume
can be set as high as possible.
3 Once water has been discharged from the tap connections, do
not interrupt the cold water flow; this will ensure that the heat
exchanger will be fully vented and that any impurities or residue
will be discharged.
3.3.2 Buffer tank
DANGER: RISK OF ELECTROCUTION
Live parts can cause an electric shock on contact and
cause fatal burns or injuries.
▪ If there is an electric immersion heater or control and
pump unit installed in the hot water storage tank then
these components must be isolated from the power
supply before starting the work (e.g. fuse, main switch
switched off and secured against inadvertent switching
on again).
CAUTION: UK only
If filling or topping up the storage tank is done by means of
the boiler filling and drain valve, a temporary filling loop
must be used with the appropriate backflow prevention
device in accordance with clause G24.2, Guidance to the
Water Supply (Water Fittings) Regulations 1999.
INFORMATION
Fill the solar circuit, heating system and storage tank
charging circuit in accordance with the operating
instructions for the individual components.
EKHWC/EKHWP hot water storage tank without solar
system and without KFE filling connection (KFE BA):
1 Connect the filling hose with backflow prevention (1/2") to the
connection "DrainBack solar - feed" (" 3‒4 Filling the buffer
storage tank(1)"[416], itemb).
2 Fill the storage tank on the EKHWC/EKHWP until water comes
out of the safety overflow (" 3‒4 Filling the buffer storage
tank(1)"[416], itemc).
3 Disconnect the filling hose with backflow prevention (1/2")
again.

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