Kioto Solar FWS 20 E Quick guide

InstallatIon and InstructIon manual FRESH watER Station
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Installation and Instruction manual
FRESH WATER STATION EN
October 2015
FWS 20 E FWS 30 E
FWS 35 E FWS WP E
Tank- and Wall fastening

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Table of contents
Usage 3
Terms of warranty 3
Safety instructions and symbol legend 3
Safety instructions 3
Symbol legend 4
Scope of delivery 4
Provisions 5
Statutory provisions 5
 Manufacturer’sspecications 5
Technical data 6
Installation 7
Installation on buffer tank 7
Wall fastening 8
Hydraulic installation 9
Circulation unit (optional) 9
Design of circulation unit 9
Installation of circulation unit 10
Electrical connection of circulation unit 10
Operating modes of circulation unit 11
Initiation 12
Malfunctions 12
Constant circulation mode 12
Fresh Water Station leaks 12
No hot water 13
Kein Zirkulationsbetrieb 13
No/wrong switching times 13
Drilling plan for wall fastening 14
Overview connections FWS+HKG+SST fresh water tank 15
Cascade circuit 16
Notes 17
Inhaltsverzeichnis

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Usage
The Fresh Water Station is used to heat up tap water in connection with a buffer tank.
It will be installed next to the buffer tank at the wall or directly onto the buffer tank at special system solutions.
Another use or installation is not intended.
The manufacturer is not liable for damages due to inappropriate use and the operator bears the risk.
Do not connect the Fresh Water station directly to any heat generator.
TheFreshWaterStationincludesaself-sufcientregulationandcanbeupgradedwithanoptionalcirculationunit
Safety instructions and symbol legend
Safety instructions
• Theinstallation,initiationandmaintenancemustonlybeaccomplishedbyqualiedtechnicalprofessionals.
The operation of this device is not allowed to persons (including children) with limited physical, sensory or intellectual
abilities. Uninformed or unacquainted persons may operate the device only under the supervision or at a trained
person’s disposition.
• Replacements or repairing of electrical parts like the power cord must be conducted by a professional electrician.
• Follow the instructions in this manual closely to ensure proper functioning.
• Exclusively use the Fresh Water Station for heating up tap water.
• Only install the device in dry and frost-free locations.
• Operate the device only at ambient temperatures between +2°C and +40° C.
• Interrupt the power supply of the heating system (230 V/AC) prior to installation.
• During operation the device can heat up and burns are possible.
• The device must be connected to an external circuit breaker to allow a shutdown at any time.
• Installation and operation must be performed according to regional laws, regulations and common practice
• At the occurrence of malfunctions – regardless of nature – please contact your authorized technical professional.
Terms of warranty
The Manufacturer issues a warranty of two years from the invoice date on the device and its constituent parts.
Without proper installation and use of the device the warranty is void.

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Symbol legend
Safety instructions
are marked with a warning triangle as illustrated on the left.
Safety instructions indicate important information for potentially dangerous situations for person and device. Additional
buzzwords describe nature and severity of the danger.
Advices
are marked with an information sign as illustrated on the left.
Advices highlight important information for situations without severe danger for person and device.
Screw wrench
indicates the maximum tightening torque and the rotational direction. max. tightening tourque [Nm]
Scope of delivery
Fresh Water Station
Connection Set
Mounting Set

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Mounting Set
Statutory provisions
TheDevicemustbeinstalledandoperatedaccordingtothefollowingnormsandcountryspecicdirectivesandprovisions:
DIN EN 12828
DIN 1988
DIN 4708
DIN 4753
DIN 4757
DIN 18380
DIN 18381
DIN 18382
DIN EN 12975
VDE 0100
VDE 0185
VDE 0190
ÖNORM H5195
Material damage
Deviations from the values stated in table 1 may lead to damages and functional limitations of the device.
Noncompliance with these values leads inevitably to a loss of guarantee.
ForoperatingtheFreshWaterStation,thefollowingspecicvalueshavetobeadhered:
Dissolved matter Unit Speci c values (copper brazed)
pH-value 7-9 (considering Saturation index)
Saturation index (delta pH-value) -0,2 < 0 < +0,2
Degree of hardness °dH 6-15
Conductivity μS/cm 10...500
Filterable matter mg/l <30
Free chlorine mg/l <0,5
Hydrosulde(H2S) mg/l <0,05
Ammoniac (NH3/NH4+) mg/l <2
Sulfate mg/l <100
Hydrocarbonate mg/l <300
Hydrocarbonate/Sulfate mg/l >1,0
Sulde mg/l <1
Nitrate mg/l <100
Nitrite mg/l <0,1
Iron, solute mg/l <0,2
Manganese mg/l <0,1
Free aggressive carbonic acid mg/l <20

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Technical data
1 Thermostatic head
2 Electricity box
3 Plate heat exchanger
4 Flow-Switch
5 HE Charge pump
6 Coiled probe
7 Push-in connection for circulation unit
(incl. blind cap)
8 Circulation unit (optional)
A Cold water
B Hot water
CFrombuffertank(ow)
D To buffer tank (return)
E Circulation pipe (not included)
D
A
C
B
4
5
63
2
8
7
1
E
Fresh water station FWS 20 E FWS 30 E FWS 35 E FWS WP E
Output [l/min] 20 30 35 30
Heat exchanger [plates] 21 29 41 49
Weight [kg] 15 17 19 21
Charge pump
Voltage [V (Hz)] 230 V (50 Hz)
Rotation speed [U/min] 800 - 4660
Power input [W] 3 - 45
Nominal current [A] 0,03 - 0,44
Circulation unit
Voltage [V (Hz)] 230 V (50 Hz)
Power input [W] 8
Nominal current [A] < 0,1
Max. operating pressure
Tap water circuit [bar] 10
Buffer water circuit [bar] 3
Insulation [material] EPP
Temperatures min. - max.
Ambiance [°C] 2 - 40°
Buffer water [°C] 2 - 95
Dimensions W x H x D [mm] 400 x 800 x 330
Connections
Cold water G1" IG
Hot water G1" IG
Bufferow G1" AG
Buffer return G1" AG
Circulation G½" IG

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90°
90°
45°
Installation
Material damage
Avoid tightening torque and force effects on already installed parts and connections of the device.
Regulation
TheFreshWaterStationincludesaself-sufcientregulation.Anadditionalexternalregulationisnotintendedandnotallowed.
Installation on buffer tank
1
2
3
4
Installation of Fresh Water Station Installation of water piping
Shaping of exible hosesInstallation of connection set
Schnitt A-A
M1 : 1
AA
ca. 10 ca. 40
max. 10 Nm
A
1
max. 70 Nm
2
max. 70 Nm
3

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5
Final assembly of shaped connection set
Wall fastening (Drilling plan for wall fastening on page 14)
max. 70 Nm
5
Schnitt A-A
M1 : 3
AA
12
12
12

80min.
60 90
10
M
36
0
max. 70 Nm
20
A
1
2
A
1
2
3
4
max. 10 Nm

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Hydraulic installation
Install the hydraulic piping according to the instructions in chapters "Installation on buffer tank" and "Wall fastening".
Piping
Piping between buffer tank and Fresh Water Station ought to be as short as possible.
When using different piping materials take care of the installation sequence to avoid electrochemical corrosion
Personal and material damage
Thetapwatersupplyneedstobeconstructedaccordingtospecication(Picturebelow).
9
13
14 10
15 16 14 K
17
Specication of tap water supply
9 Expansion vessel (optional)
10 Manometer
13 Security valve (6 bar)
14 Cut-off valve
15 Backowpreventer
16 Pressure reducer (necessary if K >= 6 bar)
17 Finelter
K Tap water main connection
Circulation unit (optional)
This chapter is only relevant for Fresh Water Stations with a circulation unit.
Design of circulation unit
1 Circulation pump
2 Gasket ring
3 Plug-in adapter
4 Non-return valve
5 Flat gasket
6 Cut-off cock
7 Swivel nut
8 Eccentric tappet
9 Circulation pipe
(not included)
optional
1
3
8
9
7
6
2
5
5
4

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Installation of circulation unit
Personal and material damage
Sufcientexpansionandoverpressuresafetydevicesmustbeinstalledinthecirculationcircuit
A rinsing port needs to be installed in the circulation circuit.
Electrical connection of circulation unit
Danger to life
Manipulation of electrical parts must be conducted by a professional electrician.
Deenergize the device before opening it. Local regulations must be observed!
Connect the circulation unit according to the desired operating mode.
Detail A
M1 : 2
Detail B
M1 : 2
A
B
1
2
3
4
5

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Operating modes of circulation unit
Circulation shutdown temperature
The circulation will be deactivated when the shutdown temperature is reached.
The preset temperature at the temperature dial (A) must be at
least 10 K below the set temperature at the Fresh Water Station to avoid
non-stop operation of the circulation unit
Set the temperature dial to the desired temperature.
Manual deactivation of circulation unit
Set operation mode selector ( C ) to “OFF”.
70°C
A
B
C
Circulation unit
Connector assignment pulsed circulation
Pulsed circulation
The circulation unit is activated by a short actuation of a
hot water tapping point
Set operation mode selector (C ) to “ON”.
Connector assignment time-dependent circulation
Time-dependent circulation (factory presetting)
Set the switching times of the circulation unit with
on the timer clock (B)
Set operation mode selector (C) to “TIMER”.
Circ HE
~
=
=
~~
235
1
4
Circ HE
=~
=
~~
235
1
4
A Temperature dial
B Timer clock with switching segments
C Operation mode selector
1 Power supply (230 V / 50 Hz)
2 Flow-Switch (FLS)
3 Charge pump Fresh Water Station (HT PUMP)
4 PWM signal HE pump
5 Circulation pump (CIRC PUMP)
1 Power supply (230 V / 50 Hz)
2 Flow-Switch (FLS)
3 Charge pump Fresh Water Station (HT PUMP)
4 PWM signal HE pump
5 Circulation pump (CIRC PUMP)
Timer clock switching segments (B) Circulation unit status
Up Activated
Down Deactivated

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Initiation
Material damages
PutfreshWaterStationintooperationonlyaftercompletedlling.
• Check tightness of swivel nuts..
• Fill device and check for leak-tightness.
• Open valves on both buffer and tap water sides slowly to avoid pressure blows.
• Connect device to power supply.
• De-aerationandrinsingofdevice:
• Open a nearby hot water tapping point and turn thermostatic head to maximum.
• The buffer-side is de-aerated by the charge pump itself.
Thermostat settings
Temperature scala settings see p.16
Stream noises
in the charge pump are an indication of air in the system.
• Set the hot water temperature as desired by turning the thermostatic head.
• Set circulation unit (optional).
• Clip on insulation.
• After initiation the complete system needs to be checked for function and leak-tightness.
Malfunctions
Prior to malfunction diagnostics, make sure that the following parameters are met:
• Sufcientowtemperature,minimum55°Catmaximum45°Ctapwatertemperature
• Faultless electrical connection
Personal and material damage
Executefaultrepaironlywithadequatequalication.
Disconnect the device from power supply before opening it.
Adhere to regional norms and regulations!
Cause Relief
Circulation unit is not set properly • Check settings of circulation pump
Set timer clock
Set operation mode selector to desired mode
Set temperature on circulation unit is
higher than the set temperature on
the thermostatic head
Align the temperature setting of the circulation unit
(approximately 10°C below the set tap water temperature)
Constant circulation mode
Cause Relief
Fresh Water Station is leaking • Check connection of pipes and sealings at the leaking device.
Replace broken sealings
Fresh Water Station leaks

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Cause Relief
Buffer tank not hot enough • Increase temperature in buffer tank
Charge pump doesn’t
convey buffer water
• Check water level in buffer tank (extraction of buffer water for the
Fresh Water Station happens at the highest point of the tank)
• De-aerate buffer circuit and check system pressure
• Check, if all shutoffs (buffer and tap water side) are open. If not, open them
Check hydraulic resistance between buffer tank and Fresh Water Station
and reduce it, if necessary
• Check at initiation if the Fresh Water Station
is correctly connected to the buffer circuit and drinking water system
• Check Flow-Switch and electricity box
• Replace broken charge pump
Flow-Switch sends no signal
to charge pump
• Remove Flow-Switch
• Clean Flow-Switch housing
• Reintegrate Flow-Switch
• If the Flow-Switch still sends no signal to the charge pump, replace Flow-Switch
Electricity box broken • Check if power cord is connected to the electricity network
• Close shutoff valves
• Remove Flow-Switch
• Check the outlet L of the charge pump with a voltage detector for voltage.
Ifthereisnovoltagewhenoperatngtheowswith,changethePCB
Wrong hot tapping water temperature • Tap hot water. Turn the thermostatic head to max. temperature for a short time
• Hotwaterisprepared:setthenthermostaticheadtothedesiredtemperature
• Nohotwaterisprepared:
Check buffer water temperature
Check the heat exchanger for thermal furring.
Thermal furring of plate heat • Clean plate heat exchanger
No hot water
Cause Relief
Circulation pump doesn’t convey. • Check if shutoff at circulation connection is open
• Check electric connections
Circulation pump is not set properly. To check that, set the operation mode
selectorto“ON”:
If the pump conveys water, check settings on the pump
and eventually switch to “Timer Mode”
If no water is conveyed, replace circulation pump
Hydraulic resistance of tap water
piping is too big for circulation pump
• Check dimensioning of tap water piping
No circulation
Cause Relief
Circulation unit was switched to
time-independent circulation
• Reconnect wiring of circulation pump for time-dependent circulation
Timer clock misaligned • Set timer clock and switching times
No/wrong switching times

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Drilling plan for wall fastening
800
360,5
43,5
200
400

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Overview connections FWS+HKG+SST fresh water tank
A B
C
D
F
E
H
G
Fresh water station
A Feed fresh water station hot
B Return fresh water station cold
Heating circuit group
C Return heating circuit low temp. cold
D Feed heating circuit low temp. hot
E Return heating circuit high temp. cold
F Feed heating circuit high temp. hot
Solar station
G Feed collector hot
H Return collector cold

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Cascade Circuit
1 Fresh Water Station – Station 1
2 Fresh Water Station – Station 2
3 Fresh Water Station – Station 3
(max. 3 stations)
4 Circulation unit (optional)
5Overowvalve
A Buffer water return
BBufferwaterow(1300l/hperstation)
C Tap water (hot)
D Circulation return (optional)
E Tap water supply
A
B
C
D
4
E
1
2
3
5
35 kPa
5
25 kPa
Advices
Die domestic hot water (DHW) temperature is dependent from the buffer temperature, the tapping quantity and the cold
watertemperate.Themixingvalvecompensatesthetemperatureuctuations.Theadjustmentofthethermostatheadand
the DHW temperature shown in the table below are indicative. Actual DHW temperature may vary.
Thermostatic head 0 1 2 3 4 5
DHW-temperature 30 34 38 42 46 50 54 58 62 66 70
Thermostat settings

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Notes

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Notes

InstallatIon and InstructIon manual FRESH watER Station
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Notes

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Contact:
Art.nr:20000071