WH-DEX-M-18(5) Instantaneous Electric Water Heater

Specifications

Model: DEX Instantaneous Electric Water Heater

Energy Efficiency Class: A

Power Rating: 18 kW (26 A) to 27 kW (39 A)

Voltage: 3~ / PE 380-415 V AC

Wire Sizes: 4.0 mm2 to 6.0 mm2

Water Flow Rate: 8 l/min

Product Usage Instructions

1. Installation

Installation site

Choose a suitable location for installation following the
provided guidelines.

Mounting accessories

Ensure you have all the necessary mounting accessories before
proceeding with installation.

Installing the wall bracket

Mount the wall bracket securely according to the instructions
provided.

Installing connection pieces

Connect the necessary pipes and components as per the
installation manual.

Installing the appliance

Follow the step-by-step instructions to install the water heater
correctly.

2. Electrical Connection

Wiring diagram

Refer to the wiring diagram to correctly connect the electrical
components.

Structural prerequisites

Ensure the electrical connections meet the structural
prerequisites for safe operation.

Load shedding relay

If required, install a load shedding relay as per the
manufacturer’s instructions.

Electrical connection from below/above

Follow the specific instructions for electrical connection based
on your setup.

3. Initial Operation

Selection of power rating

Select the appropriate power rating based on your
requirements.

Shower application

If using for showering, adjust settings accordingly for optimal
performance.

Reinstallation

If reinstallation is needed, follow the provided guidelines
carefully.

Remote control

If applicable, set up and use the remote control as
instructed.

Frequently Asked Questions (FAQ)

Q: Can I install the water heater myself?

A: Part1-11 of the safety instructions are intended for
specialists responsible for installation. For end users, it is
recommended to seek professional installation services.

Q: How do I register my warranty?

A: Refer to the last page of the user manual for warranty
registration information.

DEX Instantaneous Electric Water Heater

Online Warranty Registration

A EU ENERGY EFFICIENCY CLASS A
Please read these instructions and warranty information carefully before use and keep them handy for future reference.

Printed in Germany

USER MANUAL

WH-DEX-M-18(5)

Please register your warranty information now ! For Warranty Terms & Conditions,
please refer to the last page of this user manual.

Contents

1. Overview

04

2. Safety instructions

05

3. Technical specifications

08

4. Dimensions

09

5. Installation

10

Installation site

10

Mounting accessories

11

Installing the wall bracket

12

Installing connection pieces

13

Installing the appliance

13

6. Direct connection

14

7. Electrical connection

15

Wiring diagram

15

Structural prerequisites

15

Load shedding relay

15

Electrical connection from below

16

Electrical connection from above

17

8. Initial operation

18

Selection of power rating

18

Shower application

19

Reinstallation

19

Lock level

19

Remote control

19

9. Service menu

20

10. Maintenance work

21

Cleaning and replacing the filter strainer

22

Cleaning and replacing the filter strainer if direct connected

23

11. Environment and recycling

23

12. How to use

24

13. Troubleshooting

27

Note: Carefully read the enclosed safety instructions through in full before using the appliance and

follow them during use.

P.3

1.Overview
When ordering spare parts, please always specify the appliance model and serial number.

DEX hood Non-return valve
Flow sensor Thermal sensor set

Heating element including safety pressure cut-out
Thermal sensor set
Safety thermal cut-out DEX control panel Outlet pipe
Hot water connection

Screw-in nipples ½”

Grommet
P.4

Wall bracket Bottom part
Connecting pipe
PCB PCB cover
Control panel support Connecting terminal Inlet pipe Fine filter Flow limiter 8 l/min Frame
Cold water connection Water splash protection sleeve

2.Safety Instructions
Notice Please read these instructions carefully before installing or using the appliance! Keep the instructions handy with the appliance for future use!
Part1-11 is intended for the specialist who is responsible for the installation of the appliance. Part2, 12 and 13 are for the end user. The provided manuals correspond to the technical specifications of the appliance. The latest version of the instructions can be found online at www.germanpool.com.
– Do not use the appliance until it has been correctly installed and unless it is in perfect working order.
– Do not remove the front cover under any circumstances before switching off the mains electrical supply to the unit.
– Never make technical modifications, either to the appliance itself or the electrical leads and water pipes.
– The appliance must be earthed at all times. – Pay attention to the fact that water temperatures in excess of approx. 43°C are perceived
as hot, especially by children, and may cause a feeling of burning. Please note that the fittings and taps may be very hot when the appliance has been in use for some time. – The appliance is only suitable for domestic use and similar applications inside closed rooms, and must only be used to heat incoming water from the mains supply. – The appliance must never be exposed to frost. – The values stated on the rating plate must be observed. – In case of malfunction, disconnect the fuses immediately. In case of leaks, cut off the mains water supply instantly. Repairs must only be carried out by the customer service department or an authorised professional. – This appliance can be used by children aged from 3 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
P.5

2.Safety Instructions
· If the appliance is factory equipped with a power supply cable, it must be replaced with an original spare cable from the manufacturer in case of damaged by an authorized technician in order to avoid any hazards.
· In accordance with VDE 0700, a circuit breaker with a contact opening gap of at least 3 mm for each pole must be provided on the mains side of the connecting box for appliances with a fixed connection.
· The wall bracket must be secured with the supplied screws and dowels. The appliance must be secured to the wall bracket. The appliance may only be operated if it has been properly mounted on the wall bracket.
· The prescribed nominal pressure stated on the rating plate may not be exceeded at any time.
· The required water resistance may not fall below the value stated on the rating plate at any time. To observe additionally for pressure less installation:
· The water outlet behind the devices must not be blocked, an d the water flow must not be restricted.
· The water outlet facilities, such as shower head, jet control and other outlet unit, must be decalcified regularly. Deposits must be removed in regular intervals.
· Only the fittings recommended by the manufacturer may be used. · If the appliance is exclusively connected to a single shower, only the shower heads
recommended by the manufacturer may be used. No other fittings or appliances which decrease the water flow to the shower may be installed.

1-1121213

www.germanpool.com
– – – () – – 43()
– – – –
3

P.6

P.7

3.Technical Specifications

18 kW (26 A)

DEX ELECTRONIC MPS® A #)
18 kW..27 kW (28 A..39 A) 21 kW (30 A) 24 kW (35 A)

3~ / PE 380..415 V AC

4.0 mm2

4.0 mm2

6.0 mm2 2)

27 kW (39 A) 3~ / PE 400V AC 6.0 mm2

9.2 3) 6.8

10.7 3) 7.9

12.3 3) 9.0 3)

13.8 3) 10.2 3)

0.4 l Pressure type 1 MPa (10 bar) pressure-resistant / pressureless Bare wire heating system IES ®
1100 cm 90 mS/m
70 °C
2.5 ­ 8.0 l/min 4)
0.2 bar at 2.5 l/min 1.3 bar at 9.0 l/min 5) 20 °C ­ 60 °C G ½” 3.70 kg I PA- IX 6762/I

Model Energy efficiency class Rated capacity / rated current Chosen capacity / current
Electrical connection
Min. required cable size 1) Hot water (l/min) max. at t = 28 K max. at t = 38 K Rated volume
Maximum Static Pressure Connecting type Heating system
Required spec. water resistance @ 15 °C
Spec. electrical conductivity Inlet temperature
Flow rate to switch on ­ max. flow rate
Pressure loss Temperature choice
Water connection Weight (when filled with water)
VDE class of protection Noise level test certificate

Type of protection / safety

) The declaration complies with the EU regulation No 812/2013 1) Maximum

applicable cable size is 10mm2. 2) Mixed water. 3) Flow rate limited to achieve optimum temperature rise. 4) Without flow regulator
· Specifications are subject to change without prior notice. · If there is any inconsistency or ambiguity between the Chinese version and the English version, the
English version shall prevail. · Refer to www.germanpool.com for the most up- to-date version of the User Manual. · Under normal working conditions, incoming pressure should not exceed 0.6 MPa. Otherwise, a separate
pressure control device is necessary. When incoming water pressure exceeds 0.6 MPa, German Pool will not provide any repair service until a pressure control device is installed.
P.8

466

56

363

4.Dimensions
231 170
100

97

Dimensions in mm 231
P.9

35.T.IencshtanlilcaatiloSnpecifications

The following regulations must be observed: – VDE0100 – EN806 – Installation must comply with all statutory regulations, as well as
those of the local electricity and water supply companies.
– The rating plate and technical specifications.
– Only intact and appropriate tools must be used.

Based on the national constitution guidelines a general test certificate concerning the evidence of applicability of noise behaviour is granted.

Installation site
– Appliance must only be installed in frost-free rooms. Never expose appliance to frost. – The Appliance must be wall mounted and has to be installed with water connectors downward. – The appliance complies with protect-ion type IP25 and may therefore be installed in protection zone 1 according to VDE 0100 part 701. – In order to avoid thermal losses, the distance between the instantaneous water heater and the tapping point should be as small as possible. – For maintenance work, a shut-off valve should be installed in the supply line. The appliance must be accessible for maintenance work. – Plastic pipes may only be used if they conform to DIN16893, Series2. The hot water pipes must be thermally insulated. – The specific resistance of the water must be at least 1100 cm at 15°C. The specific resistance can be asked for with your water distribution company.

5.Installation
RDX VDX UDX

Mounting accessories
For installations under difficult conditions, these mounting accessories are available:
Mounting kit RDX
(Art. no. 34100)
The instant water heater can be installed by means of this mounting kit in the below situations. The power supply cable is coming out of the wall at any place from behind the unit, but the wall has unusual surface conditions, making it difficult for installing the water heater. The power supply cable is coming from elsewhere and has to be connected to the back of the unit.
Extension kit VDX
(Art. no. 34120) ­ RDX is necessary!
The instant water heater can be installed by means of this extension kit if the water pipes are coming displaced or exchanged out of the wall or if they are coming edgewise on the wall to the unit. The power supply could come out of the wall at any place under the unit or the wiring could be installed surfacemounted.
Extension kit UDX
(Art. no. 34110) ­ RDX is necessary!
The instant water heater can be installed by means of this extension kit if the water-connections are expiring above the unit. The power supply could come out of the wall at any place under the unit or the wiring could be installed surface-mounted.

P.10

P.11

5.Installation
Installing the wall bracket Note If you install this instantaneous water heater in exchange for a conventional instantaneous water heater, there is generally no need to drill holes for the wall bracket, in this case step 2 would not be necessary.
Thoroughly rinse the water supply pipes before installation to remove soiling from the pipes. 1. Using a 12 mm hexagon socket screw key, screw the screw-
in nipples into the wall connections. The seals must be fully screwed into the thread. After tightening, the double nipples must protrude by at least 12 mm. 2. Hold the included mounting template on the wall and align it so that the holes in the template fit over the connections. Mark the drill holes according to the template and drill them using a 6mm drill. Insert the included dowels. 3. Screw in the wall bracket.Offset tiling or uneven surfaces can be compensated by up to 30 mm with the aid of the spacers supplied. The spacers are fitted between the wall and the wall bracket.
P.12

5.Installation

Installing connection pieces
Note
Fasten the screw nuts with caution, to avoid damage to the valves or the piping system.
1. As shown in the illustration, screw the cold water connection piece with the union nut and the ½” seal onto the cold water connection.
2. Screw the hot water connection piece with the union nut and the ½” seal onto the hot water connection.
Installing the appliance
1. To open the appliance hood, take off the faceplate and unscrew the main hood screw. When replacing an appliance, the electrical power supply cable may be connected in the upper part. Only in such case, follow the instructions “Electrical connection from above”.
2. Place the appliance on the heater bracket so that the threaded rod of the wall bracket fits in the provided hole of the appliance. If necessary, slight corrections are possible by carefully bending the threaded rod of the wall bracket. However, it must be possible to screw on the water connection pipes of the appliance without applying force.
3. Screw the two ” union nuts of the appliance`s water connection pipes, each with the ” seal, onto the fittings.
4. Screw the plastic knurled nut onto the threaded rod of the wall bracket.
5. Open the water supply line to the unit and slowly open (position “open”) the shut-off valve (a) in the cold water connection piece. Check all connections for leaks.
6. Next, open and close the hot water tapping valve several times until no more air emerges from the line and all air has been eliminated from the instantaneous water heater.
Closed

P.13

(a) Open

6.Direct Connection
Note Fasten the screw nuts with caution, to avoid damage to the valves or the piping system. For direct connection, the two ½” screw-in nipples and the ½” seals must be screwed into the ½” union nuts of the hot-water and cold-water connectors. The two ½” caps of the side outlets of the hot-water and coldwater connectors must be removed and screwed onto the open end of the screw-in nipples. The hot-water and cold-water connectors must then be screwed into the 3/8″ union nut of the appliance and delivery pipe, together with the 3/8″ seals. For direct connection, it is advisable to mount the appliance at a distance as illustrated alongside, using the spacer sleeves supplied. It should therefore be noted that the two fixing holes near the lower pipe connections are also used. The flared end of the pipes must be screwed into the ½” side outlets of the hot-water and cold-water connectors with ½” union nuts and ½” seals. The holes required for the pipes must then be broken out of the housing with the aid of a blunt instrument. In case of direct connection please note: Put the strainer into the cold water connection!
P.14

7. Electrical Connection
Wiring diagram

1

5

1.Electronic circuitry

2

2.Heating element

3.Safety pressure cut-out

3

4.Terminal strip

5.Safety thermal cut-out
4

Only by a specialist!
Please observe: – VDE 0100 – The installation must comply with current IEC and national local regulations or any particular regulations, specified by the local electricity supply company. – The rating plate and technical specifications.
– The unit must be earthed!

Structural prerequisites – The appliance must be installed via a permanent connection. Heater must be earthed! – The electric wiring should not be injured. After mounting, the wiring must not be direct accessible. – An all- pole disconnecting device (e.g. via fuses) with a contact opening width of at least 3mm per pole should be provided at the installation end. – To protect the appliance, a fuse element must be fitted with a tripping current commensurate with the nominal current of the appliance.

Load shedding relay
If further three-phase appliances are connected, a load shedding relay designed for electronic instantaneous water heaters can be connected to phase conductor L2.

LCD

Description

0

Operation without load shedding relay,manufacturer`s setting

1

Operation with normal load shedding relay

2

Operation with sensitive load shedding relay

A special operating mode must be selected on the appliance for this purpose.
To change the operating mode, press the four keys ( , , and ) simultaneously and wait until the desired mode (0, 1 or 2) is shown on the display, then release the keys. Operating mode 1 must be selected first, thus to check the correct operation of the load shedding relay at low appliance output (35°C setpoint and low water flow rate). Mode 2 must be selected if the load shedding relay flickers.

P.15

7. Electrical Connection
Electrical connection from below
Note
If necessary, the connecting terminal can be displaced to the upper part of the appliance. If you want to do so, please follow the instructions in the next chapter.
Check that the power supply is switched off prior to electrical connection!
1. Dismantle approximately 6 cm off the connecting cable above the wall outlet. With the smaller opening ahead, slide the water splash protection sleeve over the connecting cable so that the sleeve is flush with the wall. This prevents any leaking water from coming into contact with the electrical leads. It must not become damaged! The protection sleeve must be used!
2. Open the control panel rightwards.
3. Strip the cables and plug them in the connecting terminals according to the wiring diagram. The appliance must be earthed.
4. Pull the protective sleeve over the connecting cables until the sleeve fits perfectly in the recess of the intermediate panel. Adjust the water splash protection sleeve as illustrated. Reinsert the control panel and lock it on the heating element.
5. Place the hood on the appliance and screw in the fastening screw. After that you can reinsert the faceplate.

7. Electrical Connection
Electrical connection from above
Switched off prior to electrical connection!
1. Open the prepared breaking point (S) in the upper part of the appliance by pressing with a blunt implement (e.g. screwdriver).
2. Slit the grommet to match the cable size. The opening in the grommet should be slightly smaller than the cross-section of the cable in order to ensure optimum protection against water. Fit the grommet into the opening. The protection grommet must be used!
3. Dismantle the cable roughly 6 cm above the point where it emerges from the wall. Hold the prepared appliance so that you can route the cable into the grommet with the other hand.
4. Place the appliance on the heater bracket so that the threaded rod of the wall bracket fits in the provided hole of the appliance.
5. Open the control panel rightwards. 6. Unscrew the fastening screw of the connecting
terminal. Displace the connecting terminal to the upper foot. Affix the connecting terminal again.
7. Strip the cables and plug them in the connecting terminals according to the wiring diagram. The appliance must be earthed.
8. Reinsert the control panel and lock it on the heating element.
9. Place the hood on the appliance and screw in the fastening screw. After that you can reinsert the faceplate.

P.16

P.17

8. Initial Operation

Multiple Power System MPS®:
The rated capacity (max. power consumption) is 27kW/400V and can be changed internally to 24kW, 21kW or 18kW.

Before making the electrical connection, fill the mains and the appliance with water by carefully opening and closing the hot water tap in order to vent completely.
To ensure a maximum flow, remove any existing aerator from the faucet. Flush the warm and cold water pipes each at least for one minute.
After every draining (e.g. after work on the plumbing system or following repairs to the appliance), the heater must be re-vented in this way before starting it up again.
If the water heater cannot be put into operation, the temperature cut-out or the pressure cut-out may have tripped during transport. If necessary, reset the cut-out.
Selection of power rating
Only by authorised specialist, otherwise lapse of guarantee!
Upon first connection of the appliance to the supply voltage, select the maximum power rating. Only after having set the power rating, the heater provides its standard operation mode.
The maximum allowable power rating at installation site depends on the local situation. It is imperative to observe all data shown in the table “Technical specifications”, in particular the required cable size and fuse protection for the electrical connection. Moreover, the electrical installation must comply with the statutory regulations of the respective country and those of the local electricity supply company (Germany: DIN VDE 0100).
1. Switch on the power supply to the appliance. The digital display on the appliance must light up.
2. When switching on the supply voltage for the first time, the value “18” flashes in the display. If not, please follow the below note “Reinstallation”.
3. Select the maximum allowable power rating depending on the local situation via the up . and down arrow keys (18 kW, 21 kW, 24 kW or 27 kW).
4. Press key to confirm the setting. The appliance starts operating.
5. Mark the set power rating on the rating plate.
6. Open the hot water tap. Check the function of the appliance.
7. After having set the maximum allowable power rating, the heating element will be activated after approx. 10-30 sec of continuous water flow.
8. Explain to the user how the instantaneous water heater works and hand over the user manual.
9. Fill in the warranty card and return to German Pool according to the instructions.
P.18

8. Initial Operation

Shower application
The water heater’s temperature must be limited to 55 °C, if it is connected to a shower. The service menu parameter Temperature Limit (“tL”) must be set to avalue less or equal 55 °C, in consultation with the customer and the lock level must be activated.
When the device is operated with preheated water, it must be ensured that this temperature is limited to 55 °C as well.
Lock level The operating mode of the appliance can be restricted.
Activation of the Lock level 1. Disconnect the appliance from the power supply
(e.g. by switching off the fuses). 2. Insert the jumper on the power electronics (see
picture). 3. Put the appliance into operation again.
Deactivation of the Lock level 1. Disconnect the appliance from the power supply
(e.g. by switching off the fuses) 2. Remove jumper 3. Put the appliance into operation again
Reinstallation In case the appliance will be commissioned again under different installation conditions than during its initial operation, it may be necessary to adapt the maximum power rating. A temporary short-circuit of the two pins, e.g. with a screwdriver acc. to EN 60900 (see figure), will reset all heater parameters to works setting and lock the heating. Value “18” flashes in the display until the maximum power rating has been selected. This condition will maintain when activating and deactivating the supply voltage.

P.19

9. Service menu

Open serivice menu Press

The service menu offers an overview of system parameters and is used for diagnostics. Press key and key simultaneously for at least 2 seconds to call up the service menu, the display confirms by “FL” and by a flashing point. Using the arrow keys and , you can switch between the individual menu items. Press key to see the value of the currently selected menu. The value flashes in the display. (The values of some menus can be switched over by using the arrow keys and .) You will get back to the drop-down-menu when pressing key again. With key you will get back to the standard display (nominal value). After two minutes without any key stroke the system automatically switches back to the standard display.

Individual menu items as follows:

“FL”: Flow Indication of current flow rate given in l/min.

“Po”: Power Indication of current power consumption (kW).

Menu item order of “Service menu”:
Flow
Power

“t1”: Temp in Indication of inlet temperature (°C). “t2”: Temp out Indication of outlet temperature (°C). “CA”: Control value Indication of calibration value of the control system. Regular range: 40 ­ 60.

Temp in Temp out Control value Power limit Diagnostics Lock level Software version Radio channel Received strength Backlight Temperature limit Signal

“PL”: Power limit Informs about the current maximum power rating (kW) of the appliance.
“Er”: Diagnostics Indication of the last ten diagnostic messages. The error code is indicated by the first displayed value after pressing key (refer to “Abstract for Trouble-Shooting & Diagnostics” in the hood). By using the arrow keys and the last 10 error codes are displayed chronologically. Tthheerceobrryetshpeodnidsipnlgayeirnrodri.cTahteeslainsttuerrnrosrtwheillebrerorrencuomrdbeedrastfrpoomsit”io0n” t”o0″”9a”nadntdhe former ones each shifted 1 position backwards.
“LL”: Lock level The operating mode of the appliance can be restricted. Setting Options: “0” no restriction (factory setting) “1” factory reset via key (countdown) not possible, parameters can be seen,
but not be modified in setup menu “2” same as “1”, additionally the setup menu cannot be opened “3” same as “2” additionally nominal value memory 1 and 2 not changeable “4” same as “3”, additionally nominal value not changeable
Note: When the setting 1, 2, 3 or 4 was chosen, the system parameters can no longer be modified in the service menu.
In order to modify these system parameters, it is necessary to remove the jumper on the power electronics, as specified in the chapter “Deactivation of the lock level”.
“nr”: Software version Information about installed software version.
P.20

9. Service menu
Menu item order of “Service menu”:
Flow Power Temp in Temp out Control value Power limit Diagnostics Lock level Software version Radio channel Received strength Backlight Temperature limit Signal

“Ch”: Radio channel (with wireless module only) Information about the current radio channel of the water heater and its remote control.
“rS”: Received strength (with wireless module only) Information about the current signal quality of the remote control as percentage. Depending on the distance between remote control and water heater the value varies between 10 % and 100 %.
“bL”: Backlight (optional) The display illumination can be activated and deactivated.
Setting options: »0« Backlight always on »1« Backlight switches on automatically, if button is pressed,
or water is heated (preset) »2« Backlight always off
“tL”: Temperature limit
The maximum setable temperature can be reduced to any value within the temperature limit. The Lock Level must be activated by placing the jumper to enable the limitation.
“IIC”: Signal Information about the quality of the radio contact when a diagnostic display is connected.

P.21

10. Maintenance work

(a)

(b)

(c)

Strainer

closed open

Maintenance work must only be conducted by an authorised professional.
Cleaning and replacing the filter strainer
The cold water connection of this instantaneous water heater is equipped with an integrated shutoff valve and a strainer. Soiling of the strainer may reduce the warm water output. Clean or replace the strainer as follows:
1. De-energize the instantaneous water heater (e.g. via deactivating the fuses) and prevent inadvertent reactivation of them.
2. To open the hood, take off the small face plate, loose the screw behind this cover and detach the hood.
3. Close the shut-off valve (a) in the cold water connection piece (position “closed”).
4. Unscrew the screw plug (b) from the cold water connection piece and take out the strainer (c).
5. The strainer can now be cleaned or replaced.
6. After fitting of the clean strainer tighten the screw plug.
7. Slowly reopen the shut-off valve in the cold water connection piece (position “open”).
8. Vent the unit by carefully opening and closing the affiliated warm water tap valve several times until air no longer emerges from the pipe.
9. Fit the hood of the unit. Then switch on the voltage again (e.g. via activating the fuses).

P.22

10. Maintenance work
Cleaning and replacing the filter strainer if direct connected The cold water connection of this instantaneous water heater is equipped with a strainer. Soiling of the strainer may reduce the warm water output. Clean or replace the strainer as follows: 1. De-energize the instantaneous water heater
(e.g. via deactivating the fuses) and prevent inadvertent reactivation of them. 2. Close the shut-off valve in the mains water supply of the instantaneous water heater. 3. To open the hood, take off the small faceplate, loose the screw behind this cover and detach the hood. 4. Unscrew mains water inlet from connection piece and take out the strainer. 5. The strainer can now be cleaned or replaced. 6. After refitting the clean strainer reconnect the mains water inlet to the connection piece. 7. Slowly reopen the shut-off valve in the mains water supply. 8. Vent the unit by carefully opening and closing the affiliated warm water tap valve several times until air no longer emerges from the pipe. 9. Fit the hood of the unit. Then switch on the voltage again (e.g. via activating the fuses).
11. Environment and recycling
Your product was manufactured from high-quality, reusable materials and components. Please respect in case of discarding that electrical devices should be disposed of separately from household waste at the end of their service life. Therefore, please take this device to a municipal collection point that accepts electronic scrap on a free of charge basis. Disposing it correctly will support environmental protection and will prevent any potential negative effects on human beings and the environment that could arise from inappropriate handling of these devices at the end of their service life. Please contact your local authority for further details of your nearest designated collection point or recycling site. Business customers: If you wish to discard electronic equipment, please contact your dealer or supplier for further information.
P.23

12. How to use

Set temperature
1

­1 °C

+1 °C

Select preset temperature

A1

A2

B1

B2

Store temperature

1

2

Set required temperature
(e.g. 43 °C)

Press

4

3

As soon as you open the hot water tap, the instantaneous water heater switches on automatically. When the tap is closed, the appliance automatically switches off.
Temperature setting You can set the required temperature gradually to a lower or higher value with the arrow keys and . The temperature changes by 1°C if key is pressed shortly one time. Pressing a key for a longer time changes the temperature continuously. You can select the outlet temperature from 20°C to 60°C.
Note If temperature is set below 20°C with arrow key
shows “–” and the appliance switches off the heating function. If the water heater supplies a shower, the maximum temperature was reduced during initial operation. This limitation cannot be exceeded.
Programme buttons The two programme buttons and allow to quickly select the preset temperature. When pressing a programme key, the preset temperature is selected and displayed. The factory setting for programme is 35°C and for programme it is 48°C. You can assign your own settings for the programme keys: Prolonged pressing of the programme key stores the previously selected temperature. The display changes from “P1” or “P2” to the newly stored temperature value. This newly set temperature is now available to you each time you press the corresponding program key.

Display of new value (e.g. 43°C)

P.24

12. How to use

Scalding protection on

1

2

Press

Scalding protection off

1

2

Press

Confirmation of deactivation

Temperature limitation The instantaneous water heater DEX is equipped with an optional temperature limiting function. This scalding protection is deactivated in the factory setting.
Switch on: Select the limit temperature, then press and simultaneously for at least 3 sec. The display briefly confirms the activation by “HI”.
Switch off: press program key and simultaneously for at least 3sec. The display briefly confirms the deactivation by “–“.
Note By activation of the temperature limit also the programme keys are limited. Therefore, the fixed values of the programme keys may be set again after deactivation of the temperature limitation.

1

Reset
2

Press + hold!
3

Reset to factory setting All factory settings can be recalled: Press and simultaneously. The display now counts backwards from “10” to “00” in second intervals. The appliance is reset at value “00” – if you stop pressing the keys earlier, you will cancel the process.

Reset completed

How to save energy
Set the exact temperature you need on the appliance and open the hot water tap. Once you feel that the water is too hot, do not add any cold water and, instead, enter a lower temperature on the appliance. If you were to add cold water, the water already heated would cool down again and valuable energy would be wasted. Moreover, the cold water added in the tap is not covered by the control range of the electronic circuitry, with the result that temperature constancy is no longer guaranteed.

P.25

12. How to use
Power limit
Unit provides no output

Power limit
If the full output of the instantaneous water heater does not suffice to heat the tapped quantity of water, this will be indicated by the LCD decimal point (e.g. in winter time, when opening several taps at once). When you reduce the hot water flow rate, the LCD point stops indicating because the output of the appliance is again sufficient to reach the set temperature. You can use the full output to fill a bathtub, for instance.
Top-up heating
When operating with preheated water (e.g. with solar systems), you must ensure that the inlet temperature does not exceed 70°C. If the inlet temperature exceeds the set point, the flashing decimal point of the digital display indicates that the heating power is switched off.
Venting after maintenance work
The instantaneous water heater features an automatic air bubble protection to prevent it from inadvertently running dry. Nevertheless, the appliance must be vented before using it for the first time. Each time the appliance is emptied (e.g. after work on the plumbing system, if there is a risk of frost or following repair work), the appliance must be re-vented before it is used again. 1. Disconnect the instantaneous water heater from the
mains by disactivating the fuses. 2. Unscrew the jet regulator on the outlet fitting and open
the cold water tap valve to rinse out the water pipe and avoid contaminating the appliance or the jet regulator. 3. Open and close the hot water tap until no more air emerges from the pipe and all air. 4. Only then should you reconnect the power supply to the instantaneous water heater and screw the jet regulator back in. 5. The appliance activates the heater after approx. 10 seconds of continuous water flow.
Cleaning and maintenance – Plastic surfaces and fittings should only be wiped with a
damp cloth. Do not use abrasive or chlorine-based cleaning agents or solvents. – For a good water supply, the outlet fittings (special tap aerators and shower heads) should be unscrewed and cleaned at regular intervals. Every three years, the electrical and plumbing components should be inspected by an authorised professional in order to ensure proper functioning and operational safety at all times.

13. Troubleshooting

The instantaneous water heater was manufactured conscientiously and checked several times before delivery. Should malfunctions nevertheless occur, it is usually only due to a bagatelle. First attempt to switch the house fuses off and on again in order to reset the electronics. Next, try to remedy the problem with reference to the following table. In doing so, you will avoid unnecessary expense of customer service assistance.

Repairs must only be carried out by authorised professionals. If a fault in your appliance cannot be rectified with the aid of this table, please contact the Central Customer Service Department at GERMAN POOL. Please have the details of the typeplate at hand.
Hong Kong Sole Agent German Pool (Hong Kong) Limited Room 113, Newport Centre Phase II, 116 Ma Tau Kok Road, Tokwawan, Kowloon, Hong Kong Tel: +852 2773 2888 Fax: +852 2765 8215 Email: info@germanpool.com

Problem

Cause

Solution

Water stays cold, digital display does not light up

Master fuse tripped
Safety pressure cut-out tripped

Renew or activate fuse
Contact customer service

Water stays cold,

Safety thermal cut- Contact customer

digital display lights up out tripped

service

Display flashes error message “Er”

Control system has Switch fuse off and

switched off

on. If “Er” still flashes

contact customer

service

Flow rate of hot water too weak

Outlet fitting dirty or calcified Fine filter dirty or calcified

Clean shower head, jet regulator or sieves
Let clean fine filter by customer service

Selected temperature Water flow rate too Reduce water flow

is not reached ,

high

rate at the tap

decimal point lights up

Selected temperature Cold water has Tap hot water only;

is not reached,

been added via the set temperature for

decimal point doesn’t tap

use

light up

Decimal point flashes

Inlet temperature Reduce inlet exceeding nominal temperature

No response upon keypress

Hood is not fitted Refit the hood

properly

properly

P.26

P.27

29

07

30

31

32

33

34

34

35

35

36

37

37

37

37

38

39

40

40

41

41

41

42

44

44

45

45

46

48

P.28

DEX

DEX

PCB
PCB
8 /

P.29

18 kW (26 A)

DEX ELECTRONIC MPS® A #)
18 kW..27 kW (28 A..39 A)
21 kW (30 A) 24 kW (35 A)

3~ / PE 380..415 V AC

4.0 mm2

4.0 mm2

6.0 mm2 2)

27 kW (39 A) 3~ / PE 400V AC 6.0 mm2

9.2 3) 6.8

10.7 3) 7.9

12.3 3) 9.0 3)

13.8 3) 10.2 3)

0.4 l Pressure type 1 MPa (10 bar)
/
Bare wire heating system IES ® 1100 cm 90 mS/m 70 °C
2.5 ­ 8.0 l/min 4) 0.2 bar at 2.5 l/min 1.3 bar at 9.0 l/min 5)
20 °C ­ 60 °C

G ½” 3.70 kg
I

PA-IX 6762/I

/
/

1. (/) t = 28 K t = 38 K
   @15

VDE

)No.812/2013 1)10 2) 3) 4)

· · · www.germanpool.com · 0.6 MPa
0.6 MPa

P.30

466

56

363

4. 231 170
   100

97

231
P.31

– VDE 0100 – EN 806 –
– –
– – – VDE0100 part701IP25
1 – –
– DIN16893 Series 2
– 151,100cm

5. RDX VDX

UDX

RDX (34100)
VDX (34120) – RDX
UDX (34110) – RDX

P.32

P.33

2

1. 1.12 12
2. 6
3. 30

P.34

1. 1/2″
2. 1/2″
1. 1.
2.
3. 3/8″3/8″
4. 5. (a)(
6.

P.35

(a)

1/2″1/2″ 1/2″ 1/2″ 3/8″ 3/8″

1/2″1/2″ 1/2″
!

1

5

2

3

4

! – VDE 0100 – IEC – –

– – – 3 –

L2

LCD 0 1 2

/

– – 4( )
135
2

P.36

P.37

1. 2. 6
3. 4. 5. 6.

1. ()(S)
2.
3. 6
4.
5.
6.
7.
8.
9.

P.38

P.39

8. MPS®: 27kW/400V 24kW21kW18kW

1

DIN VDE0100
1. 2. 18
3.
(18kW21kW24kW27kW) 4. 1 5. 6. 7.
10-30 8.
9.
55 55 55
P.40

1. () 2. () 3. 1. () 2. 3.
EN60900( )18
P.41

1+

2

2

4

3

5

6

9

8

7

1 2 2FL
1 ( ) 1 2 ()
“FL” / “Po” (kW) “t1” () “t2” () “CA” 40­60 “PL” (kW) “Er” 1 ( ) 1009 01 “LL” 0 () 1
21 3212 43
P.42

1234

“nr” “Ch” “rS”() 10%100% “bL” – 0 – 1
– 2 “tL” “IIC”

P.43

10. (a)

(b)

(c)

1. ()

3. (a)

4. (b)(c)

9. ()

P.44

1. ()
2.
3.
4.
5.
6.
7.
8.
9. ()

PE
100%

P.45

1

­1

+1

A1

A2

B1

B2

1

2

(43)

4

3

(43)

1

2

1

2

1 2060
20″–“,
1 35248
P1 P2
DEX – 3
HI – 3 —

P.46

1

2
3

1000 00

( )LCD LCD
70
1. 2. 3.
4. 5.
P.47

12. – –

,, ,

116 2113 +852 2773 2888 +852 2765 8215 info@germanpool.com

“Er”

ER

P.48

For additional product information, please visit our website.
www.germanpool.com

Notes

()

Warranty Terms & Conditions
Under normal operations, the product will gurantee a 1-year full warranty provided by German Pool (effective from the date of purchase).

1. www.germanpool.com/ warranty

• This warranty is not valid until customer registration information is received by our Service Centre within 10 days of purchase via one of the following means:

1. Visit our website and register online: www.germanpool.com/ warranty
2. Complete all the fields on the attached Warranty Card and mail it back to our Customer Service Centre.

Please fill out the form below. This information and the originalpurchase invoice will be required for any repairs. Warranty will be invalidated if information provided is found to be inaccurate.
Model No. : DEX

Serial No. :

Invoice No. :

Purchased From :

Purchase Date :

1. 2. – – () –
   3. – – – –

1-3 10

145 3

+852 2333 6249 +852 2356 9798 repairs@germanpool.com

+853 2875 2699 +853 2875 2661

1. Customer who fails to present original purchase invoice will not be eligible for free warranty service.
2. Customer should always follow the operating instructions. This warranty does not apply to: – labour costs for on-site installation, check-up, repair, replacement of parts and other transportation costs; – damages caused by accidents of any kind (including material transfer and others); – operating failures resulting from applying incorrect voltage, improper usage, and unauthorized installations or repairs.
3. This warranty is invalid if: – the purchase invoice is modified by an unauthorized party; – the product is used for any commercial or industrial purposes; – the product is repaired or modified by unauthorized personnel, or unauthorized parts are installed; – the serial number is modified, damaged or removed from the product.
4. German Pool will, at its discretion, repair or replace any defective part.
5. This warranty will be void if there is any transfer of ownership from the original purchaser.

Customer Service & Repair Centre

Hong Kong, China

Macau, China

10/F, Kowloon Godown 1-3 Kai Hing Road, Kowloon Bay, Kowloon, Hong Kong Tel : +852 2333 6249 Fax : +852 2356 9798 Email : repairs@germanpool.com

3/F, Edificio Industrial Pou Fung, 145 Rua de Francisco Xavier Pereira, Macau Tel : +853 2875 2699 Fax : +853 2875 2661

This warranty is valid only in Hong Kong and Macau

Subject to errors, technical & design changes.9120-34533

German Pool (Hong Kong) Limited

Hong Kong, China Room 113. Newport Centre Phase II. 116 Ma Tau Kok Road. Tokwawan. Kowloon. Hong Kong. Tel: +852 2773 2888 Fax:+852 2765 8215

Mainland China 8th, Xinxiang Road, Wusha Industrial Park, Daliang, Shunde, Foshan, Guangdong Tel:+86 757 2980 8308 Fax:+86 757 2980 8318

Macau, China 3/F, Edificio Industrial Pou Fung, 145 Rua de Francisco Xavier Pereira, Macau Tel:+853 2875 2699 Fax:+853 2875 2661

HONG KONG TOP BRAND TEN YEAR ACHIEVEMENT AWARD
© All rights reserved. Copying, reproducing or using the contents of this manual is not allowed without prior authorization from German Pool, violators will be prosecuted.

www.germanpool.com

WH-DEX-M-18(5.1)

References

• 德國寶German Pool | 家庭電器、廚櫃、傢俬 | 香港十大名牌
• 德國寶German Pool | 家庭電器、廚櫃、傢俬 | 香港十大名牌

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