Installation
instructions
Hot water storage tank for air-water heat pumps and
solar panels
Installation instructions
Hot water storage tank for air-water heat pumps and solar panels
EKHWP300A
EKHWP500A
English
Contents
1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1
1.2
1.3
1.4
1.5
2
Design and components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brief description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories for the hot water storage tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non return valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scalding protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
11
11
11
11
12
17
17
17
Start-up and taking out of service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1
Initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2
Taking out of service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1
Temporary shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.2
Final shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
7
8
8
9
9
9
Set-up and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1
Hydraulic system connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2
Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2
Overview of connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.4
Filling the hot water heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.5
Filling the storage tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.6
Filling the heating system and the storage tank charging circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
4
5
5
5
Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
2.2
2.3
2.4
2.4.1
2.4.2
3
Observing Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning signs and explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Avoid danger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instructions for operating safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
19
19
19
Operation and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1
5.2
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Service and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7
List of keywords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
Installation instructions
3
1 x Safety
11.1
Safety
Observing
Instructions
These instructions are intended for authorised and trained heating and sanitation experts who have experience in the proper
installation and maintenance of heating systems and hot water storage tanks by virtue of their technical training and knowledge.
This manual provides all the necessary information for installation, start-up and maintenance, as well as basic information on
operation and settings. Please go through the attached documents for a detailed description of operation and control.
Please read this manual carefully and thoroughly before proceeding with the installation or modification of the heating system.
Relevant documents
– For connection to the EKHBRD* air-water heat pump; the associated installation and operating instructions.
– For connection to the EKSRPS3 solar control and pump unit; the associated installation and operating instructions.
– For connection to the solar system; the associated installation and operating instructions.
1.2
Warning signs and explanation of symbols
Meaning of the warnings
Warnings in this manual are classified according into their severity and probability of occurrence.
DANGER!
Draws attention to imminent danger.
Disregarding this warning can lead to serious injury or death.
WARNING!
Indicates a potentially dangerous situation.
Disregarding this warning can result in serious injury or death.
CAUTION!
Indicates a situation which may cause possible damage.
Disregarding this warning can lead to damage to property and the environment.
This symbol identifies user tips and particularly useful information, but not warnings or hazards.
Special warning symbols
Some types of danger are represented by special symbols:
Electrical current
Danger of burning or scalding
Handling instructions
•
Instructions on actions are shown as a list. Actions of which the sequential order must be maintained are numbered.
Î Results of actions are identified with an arrow.
Installation instructions
4
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
1 x Safety
1.3
Avoid danger
The DAIKIN EKHWP300/500A hot water storage tank is state-of-the-art and is built to meet all recognised technical
requirements. However, improper use can lead to serious injuries or death, as well as cause material damage.
To prevent such risks, install and operate Hot water storage tank for air-water heat pumps and solar panels only:
– as stipulated and in perfect condition,
– with an awareness of the safety and hazards involved.
This assumes knowledge and use of the contents of this manual, the relevant accident prevention regulations and the recognised
safety-related and occupational medical rules.
1.4
Proper use
The DAIKIN EKHWP300/500A may only be used as a hot water storage tank. The DAIKIN EKHWP300/500A must be installed,
connected and operated only according to the information in this manual.
Any other use outside the above-mentioned use is considered as improper. Any resulting damages will be borne by the user/owner
alone.
Proper use also includes observing the relevant maintenance and servicing conditions. Replacement parts must at least satisfy
the technical requirements defined by the manufacturer. This is the case, for example, with genuine replacement parts.
1.5
Instructions for operating safety
Before working on the hot water storage tank and the heating system
•
•
•
•
Work on the hot water storage tank and heating system (e.g. installation, connection and initial start-up) should only be
carried out by authorised and trained heating experts.
Switch off the mains supply before starting any work on the hot water storage tank and heating system and secure it
against unintentional switch-on.
Lead tamper-proof seals must not be damaged or removed.
Ensure that the safety valves connected on the domestic water side conform to the requirements of EN 12897.
Electrical installation
•
•
Electrical installation may only be carried out by qualified electrical technicians under observance of the relevant electrical
guidelines and the regulations of the electric utilities company.
Compare the mains voltage indicated on the nameplate with the supply voltage before connecting to the mains.
Installation room
•
•
•
Only erect the DAIKIN EKHWP300/500A hot water storage tank if a ground load-bearing capacity of 1050 kg/m² plus safety
factor is guaranteed. The ground must be flat and level.
Erection outdoors is only possible to a limited extent. The hot water storage tank must not be continuously exposed to direct
sunlight.
The hot water storage tank must be protected from frost.
Corrosion protection
In a few regions, the water utility company supplies corrosive domestic water, which can result in corrosion damage even if highquality stainless steel is used. Ask your water utility whether using hot water storage tanks made from stainless steel can result
in corrosion problems in your area.
Suitable water treatment may be required.
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
Installation instructions
5
1 x Safety
Sanitary connection
With sanitary connection the following must be observed
•
•
•
•
•
EN 1717 - Protection of domestic water from contamination in domestic water installations 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, in addition, the country-specific legal regulations.
During operation of the hot water storage tank, the tank temperature may exceed 60 °C, particularly when solar power is
used. Therefore, some form of scalding protection needs to be included when you install the system (hot water mixing
device).
Use a pressure reducer if the cold water connection pressure >6 bar.
Operation
•
•
Do not operate the hot water storage tank if the storage tank is filled to above the overflow level.
Operate the hot water storage tank only with a set pressure reducer (max. 6 bar).
Instructing the user/owner
•
•
Installation instructions
6
Before you hand over the heating system and the hot water storage tank, explain to the owner how he/she can operate and
check the heating system.
Document the hand-over by filling in and signing the checklist in Chapter 4 "Start-up and taking out of service“, together
with the operator.
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
2 x Product description
22.1
Product
Designdescription
and components
Fig. 2-1
1
2
3
4
5
6
7
10
11
12
13
14
15
16
EKHWP300/500A - Connections and Dimensions
Solar: Flow (1“ union nut)
Cold water supply (1“ male)*
Hot water (1“ male)*
Storage tank charging flow (1“ male)*
Storage tank charging return (1“ male)*
Solar support return (EKHWP500A only) (1“ male)*
Solar support flow (EKHWP500A only) (1“ male)*
Storage tank ( polypropylene double walled jacket with PUR
hard foam heat insulation)
Fill and drain connection (Tr. 32x3 male) (Solar: return)
Not used
Corrugated stainless steel pipe heat exchanger for domestic
hot water heating
Corrugated stainless steel pipe heat exchanger for storage
tank charging
Corrugated stainless steel pipe heat exchanger for solar
support ( EKHWP500A only)
Heat-insulating jacket for solar support heat exchanger
(EKHWP500A only)
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
17
18
19
20
21
22
23
24
25
26
27
Not used
Solar: Stratification pipe flow
Fill level indicator
Not used
Sensor pocket for tank temperature sensor
Pressure-free storage tank water
Solar zone (EKHWP500A only)
Hot water zone
Type plate
Safety overflow connection (Tr. 32x3 male)
Handle
X
Y
*
Recommended wall distance 200 mm
At least 800 mm
Recommended accessory: EKSGB non-return valves (2 ea.)
Installation instructions
7
2 x Product description
2.2
Brief description
The EKHWP300/500A hot water storage tank is a combination of heat storage tank and instantaneous water heater.
The pressureless storage water serves as heat storage medium. Useful heat is supplied and removed via the spiral corrosionresistant heat exchanger, which is made from a corrugated stainless steel pipe (1.4404), and is completely immersed in the
storage tank water. In the heat exchanger for domestic hot water there are approx. 24 litres (19 l for the EKHWP300A) of
domestic water stored at the temperature level of the standby zone.
The cold water which flows in when the hot water is drawn off is first routed to the storage tank at the very bottom of the heat
exchanger, where it cools the lower zone of the storage tank down as much as possible. The standby zone is heated up by the
EKHBRD* air-water heat pump. Water flows through the heat exchanger for storage charging (SL-WT) from top to bottom.
On its way to the top, the domestic water continuously absorbs the heat of the storage tank water. Since the flow direction
makes use of the counter flow principle, and the heat exchanger is shaped like a spiral, there is definite temperature stratification
within the storage tank. As high temperatures can be maintained for a very long time in the upper section of the storage tank, a
high hot water output is achieved even if water is drawn off over a long period of time.
The EKHWP300/500A hot water storage tank can also be heated by solar energy. In the EKHWP500A hot water storage tank,
the solar zone in the lower part of the tank is cooled by the cold water flowing in. Cooling also takes place on the heating side if
the heating return temperature is lower than the temperature of the storage tank water. This means that the solar energy
installation always operates at maximum efficiency and produces the maximum heat yield.
2.3
Advantages
Optimum water hygiene
Low flow or unheated zones on the domestic water side are completely eliminated with the EKHWP300/500A hot water storage
tank. It is impossible for sludge, rust or other sediments to be deposited, as can be the case with other large volume tanks. The
water which is fed into the system first is also discharged first (first in, first out principle).
Low maintenance and corrosion
The EKHWP300/500A hot water storage tank is made of plastic and is completely corrosion free. Sacrificial anodes or similar
anti-corrosion units are not necessary. This means that associated maintenance work, e.g. changing the sacrificial anodes or
cleaning the storage tank, does not need to be carried out. Only the fill level of the storage tank water needs to be checked.
The corrugated stainless steel pipe heat exchangers on the heating and domestic water side are made from high quality stainless
steel (1.4404).
Low scaling
On the storage tank side only one deposition of scale is possible. Consequently all the stainless steel heat exchanger pipes
immersed in the storage tank water remain clean. Thus no lime encrustations, which could constantly degrade the thermal
transfer performance (as with other designs of tank) in the course of operation, can build up.
The thermal and pressure expansion and high flow rates in the domestic water heat exchanger release any possible scale deposits,
which are then flushed away.
Economical operation
The full area heat insulation of the storage tank ensures very low heat losses in use and means that the best use is made of the
heat energy being applied.
Installation instructions
8
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
2 x Product description
2.4
Accessories for the hot water storage tank
2.4.1 Non return valves
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 circulation), you should fit EKSGB (optional) non-return valves in the connections to the hot water
storage tank.
2.4.2 Scalding protection
There is a danger of scalding at hot water temperatures over 60 °C. Fitting scalding protection (on-site) enables the hot water
temperature to be varied continuously and limited.
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
Installation instructions
9
3 x Set-up and installation
33.1
Set-up and installation
Hydraulic
system connection
Fig. 3-1
Standard design of a DAIKIN solar system with EKHWP300A (DAIKIN recommends a double-sided connection)
Fig. 3-2
Standard design of a DAIKIN solar system with EKHWP500A (DAIKIN recommends a double-sided connection)
1
2
3
4
5
6
7
8
9
Installation instructions
10
External unit
Internal unit
Refrigerant heat exchanger (1st stage)
Water heat exchanger (2nd stage)
Compressor
Heating pump
Stop valve
3-way diverter valve with drive motor
Hot water storage tank
(Fig 3-1: EKHWP300A, Fig 3-2: EKHWP500A)
10
11
12
13
14
15
16
17
18
19
Heating circuit distributor
Radiator
Heating flow
Storage tank charging flow
Return flow
Hot water storage tank for air-water heat pumps and solar panels
Solar panel field
Cold water supply pipe
Hot water distribution pipe
Safety overflow pipe connection
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
3 x Set-up and installation
3.2
Set-up
CAUTION!
•
•
•
•
Only erect the EKHWP300/500A hot water storage tank if a ground load-bearing capacity of
1050 kg/m² plus safety factor is guaranteed. The ground must be flat and level.
Erection outdoors is only possible to a limited extent. The storage tank must not be exposed to
continuous direct sunlight, as the UV radiation and the effects of the weather will damage the plastic.
The EKHWP300/500A hot water storage tank must be protected from frost.
Make sure that the supply company does not provide corrosive domestic water.
– Suitable water treatment may be required.
Incorrect set-up and installation would render the manufacturer's guarantee void.
If you have questions, please contact our Technical Customer Service.
•
•
•
3.3
Remove the packaging and dispose of it in an environmentally sound manner.
Transport the hot water storage tank carefully, using the handles provided.
Install the hot water storage tank at the installation site. Recommended wall distance of 200 mm must be observed.
Installation
3.3.1 Scope of delivery
– Hot water storage tank EKHWP300A or EKHWP500A
– Connection kit for air-water heat pump EKHBRD*
3.3.2 Overview of connections
1
2
3
4
5
6
7
10
Fig. 3-3
*
Recommended accessory: EKSGB non-return valves (2 ea.)
External connections (shown on EKHWP500A)
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
17
19
21
25
26
Solar: Flow (1“ union nut)
Cold water supply (1“ male)*
Hot water (1“ male)*
Storage tank charging flow (1“ male)*
Storage tank charging return (1“ male)*
Solar support return (EKHWP500A only) (1“ male)*
Solar support flow (EKHWP500A only) (1“ male)*
Storage tank ( polypropylene double walled jacket with PUR hard foam
heat insulation)
Not used
Fill level indicator
Sensor pocket for tank temperature sensor
Type plate
Safety overflow connection (Tr. 32x3 male)
Installation instructions
11
3 x Set-up and installation
Instructions for water connection
CAUTION!
If the EKHWP300/500A hot water storage tank is connected to a heating system with steel pipes, radiators
or non-diffusion-proof floor heating pipes, slurry and swarf could enter the hot water storage tank and cause
blockages, local overheating or corrosion.
•
•
•
•
•
•
•
Flush the feed pipes before filling the heat exchanger.
Rinse out the heat distribution network (in the existing heating system).
Fit dirt filters in the heating system.
For domestic water pipes observe the stipulations of EN 806 and EN 1717.
The position and dimensions of the connections can be found in Fig 3-3.
Carefully lag the hot water pipes to prevent heat loss.
Install the hot water storage tank near to the removal point to dispense with the need for a circulation pipe. If a circulation
pipe is essential then it must be installed in accordance with the schematic drawing in Fig 3-1 or Fig 3-2.
WARNING!
There is a danger of scalding at water temperatures >60 °C. This can arise with solar energy utilisation, if
the Legionella protection is activated or if the target temperature is set to >60 °C.
•
Fit scalding protection (see Chapter 2.4.2 "Scalding protection“).
3.3.3 Installation
1.
When using non return valves (see Chapter 2.4.1 "Non return valves“), these should be fitted in the pipe connections to the
hot water storage tank.
2.
Connect the drain hose to the safety overflow connection (Fig 3-3 / ,connection 19).
– Use transparent drain hose (draining water must be visible).
– Connect the drain hose to an adequately dimensioned waste water installation.
– Drain should not be lockable.
3.
Check the water pressure at the cold water connection (<6 bar).
Î If the pressure in the domestic water supply is greater, fit a pressure reducer and limit the water pressure to <6 bar.
Installation instructions
12
4.
Establish a connection to the cold water supply (Fig 3-3, connection 2).
5.
Establish connections to the hot water distribution system; install scalding protection.
6.
Establish connections to the indoor module of the EKHBRD* air-water heat pump:
•
Check that all installation parts have been delivered.
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
3 x Set-up and installation
A1
F
Fig. 3-4
G
D
C
B
A2
H
I
J
L
K
Scope of supply of installation parts
A1
A2
B
C
D
E
Flow hose
Return hose
Sealing plug with gasket
Clamps
Clamp
Mounting bracket for 3-way diverter valve with fixing screws
•
Remove the front trim panel and the top cover on the internal unit. To
remove the front trim panel, remove the 2 bottom screws and then lift
off the panel.
Remove the upper runoff plate from the internal unit.
•
E
F
G
H
I
J
K
L
Valve actuator
Accessory parts for valve actuator
Connecting piece for 3-way diverter valve
Sealing lip for transition on rear panel housing
Grommet for cable transition on rear panel housing
Thermistor for hot water storage tank
3-way diverter valve
4x
Fig. 3-5
•
Installation position: The 3-way diverter valve must be installed in the
internal unit.
1
2
3
From internal unit
To hot water storage tank
To room heating
1
2
3
Fig. 3-6
•
•
1
2
3
4
Installation position for 3-way diverter valve
Remove the body and the actuator of the 3-way diverter valve from
the packaging.
Check the accessory parts (see Fig 3-4, Item G) which were supplied
with the actuator.
Hollow shaft
Actuator housing
Screw
Rotary knob
1
Fig. 3-7
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
Removing the cover
2
3
4
Accessory parts for valve actuator
Installation instructions
13
3 x Set-up and installation
•
Place the shaft on the valve and turn the valve so that
the shaft is positioned as shown in Fig 3-8.
Fig. 3-8
Position of 3-way diverter valve
If the valve is not positioned in this way before the actuator is fitted, it will allow water to flow both to the hot
water storage tank and to the heating system during operation.
•
Fit the body of the 3-way diverter valve into the
pipe system. To do this, proceed as follows (see
also Fig 3-9):
– Remove the clips from the flow hose (1).
– Separate the hose (2).
– Fit the connecting piece (see Fig 3-4, Item H) to
connection 2 on the 3-way diverter valve (3).
– Fit the 3-way diverter valve in the flow hose (4).
– Fit the securing clips (5, 6, 7).
– Attach the actuator (8). Slide the actuator on
to the shaft. Take care that the shaft is not
rotated while doing this and that the previously determined valve position is maintained.
A
3
1
4
2
A
8
5
6
7
Fig. 3-9
•
Fitting the 3-way diverter valve
Fit the rotary knob to the valve actuator housing - see Fig 3-10.
Room heating
Hot water storage tanks
Make sure that the rotary knob is fully pushed in so that is can
be actuated automatically by the unit. The rotary knob can be
operated manually if it is slightly lifted.
Fig. 3-10
Rotary knob on the valve actuator housing
3 x Set-up and installation
•
Fasten the power supply cable securely to the body of
the 3-way diverter valve with a customer-supplied cable
tie - see Fig 3-11.
Fig. 3-11
Power supply cable for the 3-way diverter valve
WARNING!
Live parts can cause an electric shock on contact and cause life-threatening burns and injuries.
•
Before beginning work on live parts, disconnect them from the power supply (fuse, switch off main
switch) and secure against switching on again.
The electrical connection should only be performed by electrical engineers in compliance with applicable standards and guidelines as well as the specifications of the energy supply company.
•
•
Establish the electrical connections in the switch box of the internal unit. See the following illustration for this:
X2M
3
4
5
Fig. 3-12
BLU
BLK
BRN
3-way switch valve
N
Y
L
Electrical connection of the 3-way diverter valve to the internal unit
Make sure that the cabling within the unit is carried out properly (you can find the diagram for this in the installation instructions
for the internal unit). See also the electrical circuit diagram supplied with the internal unit.
3 x Set-up and installation
•
Connect the flexible hoses as shown in Fig 3-13.
! First remove the blanking plug on the return connection on the unit.
A1
A2
B
C
D
E
A2
A1
!
J
Plan view (top)
Elevation
Rear cladding
A1
A2
B
C
D
E
Flow hose
Return hose
Sealing plug with gasket
Clamps
Clamp
Mounting bracket for 3way diverter valve with
fixing screws
Sealing lip for transition
on rear panel housing
Grommet for cable
transition on rear panel
housing
Thermistor for hot water
storage tank
I
1
I
1
2
3
J
3
K
J
A1
I
K
•
•
•
Connection of flexible hoses in the internal unit
Connect the thermistor cable to the switch box in the
internal unit. Make sure that the power supply is switched
off. See the electrical circuit diagram supplied with the
internal unit for this.
The distance between the thermistor cable and the mains
cable must always be at least 50 mm, so that the thermistor
cable is not subjected to any electromagnetic interference.
Plug the connector on the thermistor cable into socket X11A
on the PCB.
For strain relief, fasten the cable to the corresponding anchor
points with cable ties.
When laying the cables, take care that the cables do not
obstruct the attachment of the internal unit covers.
3-way
valve
N Y L
>50 mm
X2M
•
K
BLU
BLK
BRN
Fig. 3-13
2
A2
3
4
5
Note: Only the relevant on-site cabling is shown.
•
Insert the thermistor to a depth of 80 cm in the probe tube
(see EKSRPS3 operating and installation instructions).
A3P
X11A
Fig. 3-14
Installation instructions
16
Connection of the internal unit
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
3 x Set-up and installation
•
Optional: cable connection for solar priority
– Install the EKRP1HBAA solar module in the switch box in
the internal unit.
See the installation instructions accompanying the solar
module.
– Connect the EKS164110 solar priority cable to the solar
PCB (A7P).
– Parameter 6-03 on the internal unit must be set to "1".
Y3
YC
X1A
A7P
A7P
OFF ON
X2A/CN2
If there is sufficient solar yield, post heating by the heat pump can
be disabled.
EKS164110
EKHBRD*
EKSRPS3
Fig. 3-15
•
•
Cable connection for solar priority
Reattach the runoff plate to the internal unit.
Refit the upper cover and trim panel.
3.3.4 Filling the 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.
4.
After approx. 10 minutes' flushing, turn off the taps.
3.3.5 Filling the storage tank
1.
Connect the filling hose with return flow inhibitor (½") to the boiler filling and draining valve on the EKSRPS3 control and
pump unit.
2.
Fill the storage tank until water comes out of the safety overflow connection (Fig 3-3, Item 26).
3.3.6 Filling the heating system and the storage tank charging circuit
•
See the operating and installation instructions for the EKHBRD* air-water heat pump.
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
Installation instructions
17
4 x Start-up and taking out of service
44.1
Start-up
taking out of service
Initialand
start-up
Requirements
–
–
–
–
The EKHWP300/500A hot water storage tank is erected and fully connected up.
The heating and hot water system are filled and pressurised to the correct pressure.
The EKHWP300/500A hot water storage tank is filled to the overflow point.
Solar system: All hydraulic and electrical connections have been established in accordance with the installation
instructions.
Checks before start-up
• Check all connections for leaks.
Start-up
• Check all the points on the enclosed checklist. Make a record of the test results and sign it, together with the operator.
• Switch on the EKHBRD* heat pump and start and configure the hot water generation mode (see the EKHBRD* operating and
installation instructions).
Only if all points on the checklist can be answered with Yes may the EKHWP300/500A be started up.
Check list for start-up
1.
Is the hot water storage tank properly installed in accordance with a permitted set-up variant and without any discernible damage?
‰Yes
2.
Is the storage tank is filled with water to the overflow point?
‰Yes
3.
With restoration: Has the heat distribution network been cleaned?
‰Yes
4.
Is the safety overflow connection connected to an open drain?
‰Yes
5.
Is the water pressure in the system < 6 bar?
‰Yes
6.
Has the heating circuit been bled?
‰Yes
7.
Are all hydraulic connections tight (leaks)?
‰Yes
8.
Does the installation operate without faults?
‰Yes
9.
In the case of new installations: Has the operating manual been handed over, and has the owner been instructed?
‰Yes
Location and Date:
Signature of installer:
Signature of owner:
Installation instructions
18
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
4 x Start-up and taking out of service
4.2
Taking out of service
4.2.1 Temporary shutdown
CAUTION!
A heating system which is shut down can freeze in the event of frost and may suffer damage.
• Drain the heating system that is shut down if there is danger of frost.
If no water heating is required for a long period, the heating system can be temporarily switched off at the mains switch.
If there is a danger of frost:
– the heating system must be started again
or
– suitable antifreeze measures must be applied to the connected heating system and hot water storage tank (e.g. draining).
If there is a danger of frost for just a few days, the unit's excellent heat insulation means that the insulated tank
does not have to be drained, provided that the storage tank temperature is monitored regularly and does not fall
below +3°C. This does not, however, provide any protection against frost for the connected heat distribution
system!
Draining the hot water storage tank
• Switch off the main switch and secure against restarting.
• Connect a hose to the hose connection on the filling and draining valve on the solar return line.
• Drain the tank's water content.
4.2.2 Final shutdown
•
•
•
•
Take the EKHBRD* air-water heat pump out of operation (see the associated operating and installation instructions).
Take the EKSRPS3 solar control and pump unit out of operation (see the associated operating and installation instructions).
Disconnect the EKHWP300/500A hot water storage tank from all electrical and water connections.
Dismantle the EKHWP300/500A hot water storage tank in reverse order to the assembly instructions (Chapter 3 "Set-up and
installation“).
• Dispose of the EKHWP300/500A hot water storage tank professionally.
Recommendations for disposal
Thanks to the environmentally friendly design of the solar system, DAIKIN has complied with requirements for
environmentally sound disposal. During the disposal process, the only waste created is that which can be used
for material or thermal recycling.
The materials that are suitable for recycling can be separated so that they are unmixed.
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
Installation instructions
19
5 x Operation and Maintenance
55.1
Operation and Maintenance
Operation
No separate controller is required to operate the hot water storage tank. Control is effected by means of the connected
EKHBRD* air-water heat pump and, when a solar system is connected, also via the EKSRPS3 control and pump unit.
•
5.2
Check the level in the storage tank at regular intervals and top up with water if required.
Service and maintenance
The EKHWP300/500A hot water storage tank is practically maintenance free by virtue of its design. No corrosion protection
equipment is required (such as sacrificial anodes). This means that associated maintenance work, e.g. changing the protective
anodes or cleaning the inside of the storage tank, does not need to be carried out.
Regular inspection of the hot water storage tank guarantees a long working life and fault-free operation.
Tests performed during the annual service:
WARNING!
Live parts can cause an electric shock on contact and cause fatal burns or injuries.
•
If the EKSRPS3 control and pump station is installed on the hot water storage tank, then this component
must be disconnected from the power supply before starting the inspection and maintenance work
(e.g. fuse, main switch switched off and secured against inadvertent switching on again).
WARNING!
All work performed on live components must be carried out in accordance with the proper procedures,
otherwise there may be a danger to the life and health of individuals and the function may be impaired.
•
Rectification of damage to live components may only be carried out by heating engineers authorised and
recognised by the energy supply company.
– Visual inspection of the general condition of the hot water storage tank.
– Visual inspection of connections and pipes. In the event of damage, determine the cause.
Î Replace defective parts.
– Check all electrical components, connections, and cables.
Î Repair damaged parts or replace them.
– Check the water pressure of the cold water supply (<6 bar).
Î If necessary check the fitting or adjustment of the pressure reducer.
– Visual check of the water storage tank level (water level at the overflow point).
Î If necessary, top up the supply water to the overflow point.
– Check the connection of the safety overflow and drain hose for leaks, free drainage and gradient.
Î If necessary clean the safety overflow and drain hose and and re-route, replace damaged parts.
Clean the storage tank (annually)
•
•
Installation instructions
20
The low-maintenance plastic must only be cleaned with a soft cloth and a mild detergent.
Do not use cleaning agents containing aggressive solvents, as this will damage the plastic surface.
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
6 x Technical data
6
Technical data
EKHWP300A
EKHWP500A
Basic data
Unit
Total storage capacity
litres
300
500
Empty weight
kg
59
92
Total filled weight
kg
359
592
Dimensions (L x W x H)
cm
59.5 x 61.5 x 159
79 x 79 x 159
Maximum permissible storage tank water temperature
°C
85
85
kWh/24h
1.3
1.4
litres
27.8
28.4
bar
6
6
Heat consumption at readiness and at 60 °C
Domestic hot water (stainless steel)
Domestic water capacity
Maximum operating pressure
2
Domestic water heat exchanger surface
m
5.7
5.9
Average specific thermal output
W/K
2795
2860
Water content heat exchanger
litres
12.3
17.4
Heat exchanger surface area
m2
2.5
3.7
Average specific thermal output
W/K
1235
1810
Storage tank charging heat exchanger (stainless steel)
Solar heating support (stainless steel)
Water content heat exchanger
—
4.8
Heat exchanger surface area
2
m
—
1.0
Average specific thermal output
W/K
—
310
Hot and cold water
inches
1" ET
1" ET
Heating flow and return flow
inches
1" ET
1" ET
Pipe connections
Tab. 6-1
Basic data for the hot water storage tanks
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
Installation instructions
21
7 x List of keywords
C
Check list for start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Circulation pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connections and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Convection brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Corrosion protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
D
E
F
W
Wall distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Warning signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Water hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Water pressurekeywords
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7
List of
Danger of frost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Dangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Design and components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dirt filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Domestic water pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
EKSRPS3 Control and pump unit . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electronic control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Equipment installation room
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
H
I
Heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Connection kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Relevant documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Hydraulic system connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5, 15
Hydraulic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Instructions for operating safety . . . . . . . . . . . . . . . . . . . . . . . . . . 5
O
Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Overview of connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 11
P
Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
R
Relevant documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
S
Sacrificial anode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8, 20
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety overflow connection . . . . . . . . . . . . . . . . . . . . . . . . . 12, 20
Sanitary connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Scalding protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9, 12
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Set-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Final . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Temporary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
T
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Type plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 11
Installation instructions
22
EKHWP300/500A
Hot water storage tank for air-water heat pumps and solar panels
4PW55928-1
EKHWP300/500A
Warmwasserspeicher für Luft-Wasser-Wärmepumpen und
Solarkollektoren
4PW55928-1
Installationsanleitung
23
4PW55928-1
Copyright © Daikin
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