clage DEX ELECTRONIC MPS User manual

Electronically controlled instantaneous water heater
DEX: 27931 - 60 °C models
Instructions for the user

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
1. Overview
When ordering spare parts, please always specify the appliance model and serial number.
Pos. Part.-No. Description
1 801097 Hot water connection
2 Outlet pipe
3 801107 DEX control panel
4 801098 DSX / DEX thermal sensor set 2.1
5 801100 Flow sensor
6 801101 Non-return valve
7 DEX hood
8 Wall bracket
9 Bottom part
10 DBX / DEX connecting pipe
11 801102 PCB cover 2.1
12 Control panel support
13 Connecting terminal
14 Inlet pipe
Pos. Part.-No. Description
15 Frame
16 801108 Flow limiter 8 l/min
17 801104 Fine filter
18 801105 Cold water connection
19 Water splash protection sleeve
20 Grommet
21 Screw-in nipples 1/2”
22 801109 Faceplate
not shown:
23 801106 Set of small spare parts
24 Operating foil
Parts in Bold Type are available as Spare Parts.
Other parts are available on request.
10
9
8
11
12
13
14
18
17
16
19
2021
15
7
6
5
4
4
3
2
1
MADE IN GERMANY
22

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
This symbol on the products and / or accompanying documents means that used electrical and electronic prod-
ucts should not be mixed with general household waste. For proper treatment, recovery and recycling, please take
these products to designated collection points. Alternatively, in some countries you may be able to return your
products to your local retailer upon the purchase of an equivalent new product. Disposing of this product correctly
will help to save valuable resources and prevent any potential negative effects on human health and the environment which could other-
wise arise from inappropriate waste handling. Please contact your local authority for further details of your nearest designated collection
point. Penalties may be applicable for incorrect disposal of this waste, in accordance with national legislation. If you are a business user
and you wish to discard electrical and electronic equipment, please contact your dealer or supplier for further information. This symbol is
only valid in the European Union.
2. Environment and recycling
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Environment and recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5. Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6. Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7. Description of appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
9. Additional features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
10. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
11. Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Contents

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
Installation, initial operation and maintenance of this appliance must only be conducted by an authorised professional, who will then be
responsible for adherence to applicable standards and installation regulations. We assume no liability for any damages caused by failure
to observe these instructions.
• Do not use the appliance until it has been correctly installed and unless it is in perfect working order.
• The appliance is suitable but not limited to domestic use and similar applications inside closed, frost-free rooms, and must only be
used to heat potable water from mains supply.
• The appliance must never be exposed to frost.
• The appliance must be earthed at all times.
• The minimal specific water resistance must not fall below the value stated on the label.
• The maximum water pressure must not exceed the value on the label.
• Before commissioning for the first time and each time the appliance is emptied (e.g. due to work on the plumbing system, if there is a
risk of freezing or in case of maintenance), the appliance must be vented correctly in accordance with the instructions in this manual.
• 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.
• 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.
• Water inlet temperature must not exceed 70 °C.
• In case of malfunction, disconnect the fuses immediately. In case of leaks, cut off the cold water supply instantly. Repairs must only be
carried out by the customer service department or an authorised professional.
• This appliance must not be used by any person (including children) with limited physical, sensorial or mental abilities or failing experi-
ence and/or knowledge unless they are supervised by a person responsible for their safety or received instructions about how to use
the appliance. Children should be supervised in order to make sure that they do not play with the appliance.
3. Safety instructions

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
4. Technical specifications
Model DEX ELECTRONIC MPS®
Part no. 27931 - 60 °C models
Rated capacity / rated cur-
rent 18 kW..27 kW (26 A..39 A)
Chosen capacity / current 18 kW (26 A) 21 kW (30 A) 24kW (35 A) 27kW (39 A)
Electrical connection 3/PE 380..415V AC 3/PE 400V AC
Min. required cable size See note 1)
Hot water (l/min)
max. at Δt = 28 K 9,2 2) 10,7 2) 12,3 2) 13,8 2)
max. at Δt = 38 K 6,8 7,9 9,0 2) 10,2 2)
Rated volume 0,4 l
Type Pressure type 1 MPa (10 bar)
Heating system Bare wire heating system IES ®
Required spec. water
resistance @ 15°C ≥ 1100 Ωcm
Spec. electrical conductivity ≤ 90 mS/m
Inlet temperature ≤ 70 °C
Flow rate to switch on – max.
flow rate 2,5 – 8,0 l/min 3)
Pressure loss 20kPa at 2,5 l/min 130kPa at 9,0 l/min 4)
Temperature choice 20 °C – 60 °C
Water connection G ½“
Weight (when filled with
water) 3,70 kg
VDE class of protection I
Noise level test certificate PA-IX 6762/I
Type of protection / safety
1) The cross sectional area of the connection cable must be in accordance with the power rating of the appliance and the specific
requirements of AS/NZS 3000.
2) Mixed water
3) Flow rate limited to achieve optimum temperature rise
4) Without flow regulator
5. Dimensions
231
170
466
56
100
363
231
97
Dimensions in mm
WMKA30016
AS 3498
IP25

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
6. Typical installations

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
6. Typical installations
466
36356
100
170
231
upper edge of the shower cabin approx. 1950
alternative
rear cable entry
depth of
the unit: 97
rear
cable
entry
min.10
shut-o
valve
upper edge of the wash basin approx. 850
dimensions in mm
550

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
7. Description of applicance
The instantaneous water heater DEX is a microprocessor-controlled, pressure-resistant water heater for a decentralised water supply to
one or more tap connections.
Its electronic control regulates the power consumption depending on the selected outlet temperature, the respective inlet temperature
and the flow rate, thus reaching the set temperature exactly to the degree and keeping it constant in case of pressure fluctuations. The
required outlet temperature can be entered between 20 °C and 60°C and is indicated on the digital display.
This appliance may be able to be used with a Thermostatic Mixing valve or where serving a fixture that does not require temperature limi-
tation such as a commercial Kitchen sink or Cleaners sink. Refer to AS/NZS 3500.4.
8. Operation
Temperature setting
The required hot water temperature can be increased or decreased in incre-
ments of 1°C by briefly pressing the up arrow and down arrow function keys.
Depressing the function key for a longer time changes the temperature continu-
ously.
The temperature can be adjusted between 20°C and 60°C.
Note. Reducing the temperature below 20°C displays ‘- -’ and the heating func-
tion will not operate.
Program buttons
The two program keys allow a preset temperature to be selected quickly.
The factory setting is 35°C for program 1 and 48°C for program 2.
The preset temperature can be changed to the current temperature setting by
prolonged pressing of the program key.
The display changes from ‘P1’ or ‘P2’ to the new temperature value which be-
comes available each time the corresponding program key is pressed.
Set temperature
-1°C +1°C
Select preset temperature
A2
A1
B1 B2
Store temperature
Press > 3 seconds
Set required
temperature
12
3
4

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
9. Additional features
Reset to factory settings
To reset to factory settings press the up arrow and down arrow
function keys simultaneously.
The display will count backwards from ‘10’ to ‘00’ in one second
intervals.
The appliance is reset when the counter reaches ‘00’.
Releasing the function keys earlier will cancel the process.
Energy saving
Set the required hot water temperature on the appliance.
If the water is too hot reduce the temperature on the appliance instead of
mixing with cold water.
Adding cold water wastes valuable energy that has been used producing
excessively hot water.
Also, any cold water added is not controlled by the electronic circuitry meaning
that precise temperature control can no longer be guaranteed when supplying
more than one outlet.
Power limit
If the maximum power available from the DEX heater is insufficient to heat the
volume of hot water being drawn off to the required temperature, this will be
indicated by the LCD decimal point on the display.
Reducing the flow rate will enable the required temperature to be delivered
indicated by the decimal point remaining solid.
Operation with solar systems
Type DEX are suitable for use with solar heating systems providing
appropriate controls are in place to ensure that the temperature of the water
entering the unit does not exceed 70°C.
If the inlet temperature exceeds the set point, the flashing decimal point on the
display indicates that the heating power is switched off.
Press + hold
Reset complete
Reset to factory settings
1 2
3
Unit provides no output
Power limit

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
10. Maintenance
Cleaning and replacing the filter strainer
The cold water connection of the appliance is fitted with an integral
shut-off valve and filter strainer. Soiling of the strainer may reduce
hot water output from the unit.
The strainer should be cleaned or replaced as follows:
1. Isolate the electrical supply to the unit.
2. Remove the appliance cover and close the shut-off valve (see
Fig 12) in the cold water connection piece to position II.
3. Unscrew the screw plug (A) from the cold water connection
piece and take out the strainer (B) (see Fig 13).
4. The strainer can now be cleaned or replaced.
5. After re-fitting the strainer tighten the screw plug.
6. Slowly open the shut-off valve in the cold water connection
piece to position 1.
7. Vent the unit by carefully opening and closing the hot water tap
several times until all air has been eliminated from the water
heater and no more air emerges.
8. Re-fit the appliance cover and restore power to the unit.
Fig 13
Fig 12
N.B. Maintenance work must only be carried out by a qualified tradesperson familiar with instantaneous water heaters.
Plastic surfaces and sanitary fittings should only be wiped with a damp cloth.
Never use abrasive or chloric cleaning agents or solvents.
Outlet fittings (tap nozzles and shower heads) should be unscrewed and cleaned at regular intervals.
The electrical and plumbing components should be inspected regularly by a competent person to ensure proper functioning and opera-
tional safety. Water quality should be considered when determining the frequency of inspection.
Each time the appliance is emptied (e.g. due to work on the plumbing system, if there is a risk of freezing or in case of maintenance), the
appliance must be vented by opening and closing the hot water tap until all air has been eliminated from the water heater and no more
air emerges before re-connecting to the electrical supply.

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Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
Problem Cause Solution
Water stays cold
Digital display does not light up
Circuit breaker tripped Reset circuit breaker
STCO tripped Contact Zip Service to reset STCO
Display flashes error
message ‘ER’ Control system has switched off Switch power supply off and on. If ‘ER’ still flashes
contact Zip Service
Poor hot water flow rate
Outlet fitting dirty or
calcified Clean shower head or tap nozzle
Fine filter dirty or calcified Contact Zip Service to clean fine filter
Selected temperature not achieved
Decimal point flashes Excessive water flow rate Reduce water flow rate at the outlet
Selected temperature not achieved
Decimal point does not flash Cold water has been added at the outlet Set for required
temperature and tap hot water only
Decimal point flashes Inlet temperature exceeding set point Reduce inlet temperature
No response to key press Appliance cover not fitted correctly Contact Zip Service
11. Fault finding
Repairs should only be carried out by qualified tradespersons familiar with electric instantaneous water heaters.
All service work should be performed by an authorized Zip service technician – for details of the full range of services available call Zip
Service on 1800 460 222.
When calling for service, please always specify the appliance model and serial number.
The following table will be helpful in determining the causes of some common problems and their solutions.

Instructions for user - 9120-34313 - DEX - 801047 - November 2012 v1.00
Quick reference guide
Head Office
Zip Heaters (Aust) Pty. Ltd.
ABN: 46 000 578 727
67 Allingham Street
Condell Park NSW 2200
Postal: Locked Bag 80
Bankstown 1885 Australia
Website: www.zipheaters.com
Facsimile: [phone]
Telephone: [phone]
Free Call: 1 800 638 633
As Zip policy is one of continuous
product improvement, changes
to specifications may be made
without prior notice. Images in this
booklet have been modified and
may not be true representations of
the finished goods.
Set temperature
1
–1 °C +1 °C
Select preset temperature
A1 A2
B1 B2
Power limit
+
Reset
1
Press + hold!
Reset completed
3
2
Unit provides no output
Arrow keys up and down
Programme button 1 Programme button 2
Store temperature
2
Press
≥ 3 secs
Display of new value (e.g. 43 °C)
Set required
temperature
(e.g. 43 °C)
4 3
1