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1.5.3 Working on cooling systems (heat
pump)
The DAIKIN EKHHP requires fluorinated green-
house gas for its function.
For work on stationary refrigeration sys-
tems (heat pumps) and air conditioning
systems, proof of expertise is required in
the European Community according to the
F-Gases Directive (EC) No. 303/2008.
– up to 3 kg coolant fill quantity: Expert
certificate category II
– 3 kg coolant fill quantity or over:
Expert certificate category I
● Always wear safety goggles and protective
gloves.
● When working on the refrigerant circuit, ensure
that the workplace is well ventilated.
● Never carry out work on the refrigerant circuit in
closed rooms or work pits.
● Do not let coolant come into contact with open
fire, embers or hot objects.
● Never allow coolant to escape into the atmos-
phere (high pressure at the point of the leak).
● When removing the service pipes from the
filling connections, never hold the connections
in the direction of your body. Residual refrig-
erant could escape.
● Components and spare parts must at least
satisfy the technical requirements defined by
the manufacturer.
1.5.4 Site of installation
For safe and fault-free operation, it is necessary
that the installation location of the DAIKIN EKHHP
fulfils certain criteria.
Related information can be found in chapter 2.3.
Information on the installation site of other compo-
nents can be found in the associated documen-
tation supplied with them.
1.5.5 Sanitary connection
● You must comply with;
– EN 1717 - Protection of domestic water from
contamination in domestic water installa-
tions and general requirements concerning
safety equipment for the prevention of
domestic water contamination by back-flow
– EN 806 - Technical regulations for domestic
water installations (TRWI)
– and, as a supplement, the country-specific
legal requirements.
DAIKIN EKHHP(3/5)00AA2V3
DAIKIN Hot water heat pump
008.1423444_02 – 09/2015
A safety valve must be fitted in the domestic water
feed to the DAIKIN EKHHP. There should be no
isolating fitting between the safety valve and the
DAIKIN EKHHP.
Any steam or heating water which may escape
must be diverted by a suitable blow-off line with
constant gradient in a frost-protected, safe and
observable manner.
The storage tank temperature can exceed 60°C if
you connect a solar system.
● For this reason you should fit scalding
protection (e.g. VTA32 + Screw connection set
1") during installation.
The domestic water quality must comply
with the EU Guideline 98/83 EC and the
regionally-applicable regulations.
1.5.6 Requirements for the buffer tank water
Observe the current technological regulations to
prevent corrosion products and deposits.
Minimum requirements regarding the quality of
filling and supplementary water:
– Water hardness (calcium and magnesium,
calculated as calcium carbonate): ≤ 3 mmol/l
– Conductivity: 1500 (ideal: < 100) μS/cm
– Chloride: ≤ 250 mg/l
– Sulphate: ≤ 250 mg/l
– pH value: 6,5 - 8,5
Using filling water and top-up water which does
not meet the stated quality requirements can
cause a considerably reduced service life of the
equipment. The responsibility for this lies solely
with the operator.
1.5.7 Operation
The DAIKIN EKHHP:
● Do not operate until all installation and
connection work is completed.
● Only operate the ROTEX HybridCube with a
completely full storage tank (level indicator).
● Only connect with a pressure reducer on the
external water supply (supply line).
● Only operate the with the specified quantity of
coolant and the type of coolant specified.
● Only operate if the protective cover is installed.
The specified servicing intervals should be ad-
hered to and inspection work must be carried out.
1
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Safety
Installation and maintenance manual
7
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