DH24400 - Electric water heater SIEMENS - Free user manual and instructions

Brand	Siemens
Model	DH24400
Type	Instant electric water heater
Nominal power	24 kW
Nominal voltage	400 V 3~ three-phase
Energy efficiency class	A
Draw profile	S
Annual energy consumption	483 kWh
Nominal pressure	1 MPa (10 bar)
Minimum flow pressure (with limiter)	0.09 MPa (0.9 bar)
Heating positions	Two: Economy (e) and Intensive heating (II)
Main functions	Instant water heating, two power levels
Frost protection	Yes, do not expose to frost
Protection class	I (requires grounding)
Electrical connection	Power cable, section adapted to power, all-pole disconnection device
Water connection	Pressure-resistant closed circuit, cold water pipe
Cleaning	Damp cloth, no aggressive detergents or steam cleaner
Descaling	Only by a specialist
Spare parts	Filters, flow limiter, seals, cables
Optional accessories	Piping BZ 45U20, priority switch BZ 45L21, mounting kit BZ 45K23
After-sales service	E and FD numbers on the device, contact approved installer

Frequently Asked Questions - DH24400 SIEMENS

How to start the water heater after a water outage?

After a water outage, turn off the device by unscrewing the fuses. Leave the hot water tap open until the air has escaped, then screw the fuses back in. The device is then ready to operate.

What to do if the water is not hot enough?

First check the fuse of the domestic installation. If the automatic circuit breaker has tripped, have it checked by a specialist. Reduce the water flow if the power limit is reached or if the inlet temperature is too low.

How to adjust the water temperature?

To increase the temperature, close the hot water tap slightly. To decrease the temperature, open the cold water tap. Use the Economy (e) position for reduced power and Intensive heating (II) for full power.

What regular maintenance is required?

Clean the device with a damp cloth without abrasive detergent. Descaling must be done only by a specialist. Regularly check the filters and the flow limiter.

What to do in case of a water leak?

In case of a leak, immediately shut off the cold water supply and disconnect the mains voltage. Contact an approved installer for repair.

Can I install the water heater myself?

Installation must be carried out by an approved installer. The device must be permanently connected to the fixed water pipes and to the electrical network with grounding. Non-compliance can lead to risk of electric shock.

How to save energy with this device?

Use the Economy (e) position as often as possible. For the washbasin, open the angle regulator valve so that only the small heating power switches on.

Why is the water not hot enough in winter?

In winter, the water supply temperature may drop. To compensate, reduce the water flow at the tap until the desired temperature is achieved.

What to do if the water flow is too low and the device does not start?

Clean or descale the screen of the tap or shower head. If the problem persists, have the screen of the angle regulator valve cleaned by a specialist.

What is the warranty of this device?

The warranty conditions are those published by the distributor in the country of purchase. For any claim, provide the proof of purchase and contact the retailer.

USER MANUAL DH24400 SIEMENS

Installation and operating instructions

Eine Störung, was tun?

Achtung!

This appliance is intended for domestic use or for household-based, non-commercial applications. Household-based applications include, e.g. usage in employees catering facilities for shops, offices, agricultural and other commercial operations, as well as usage by guests of guest houses, small hotels and similar residential establishments.

• Install and operate the appliance as described in the text and illustrations. We do not accept liability for damage resulting from failure to heed these instructions.
  This appliance is intended for use up to an altitude of 2000 m above sea level.
  The appliance may only be installed and stored in a frost-free room (due to residual water).

Risk of electric shock! Switch off the mains voltage supply immediately if a fault occurs. Immediately shut off the cold water supply to the appliance should it leak.

The continuous-flow heater may only be connected and put into operation by a qualified professional.
In order to avoid potential sources of danger, repairs and maintenance may only be undertaken by a suitably qualified specialist.

- Never open the appliance without disconnecting the power supply beforehand.

The statutory regulations of the respective country, as well as those of the local electricity and water suppliers, must be adhered to.

The continuous-flow heater is a Class I appliance and must be connected to the protective earth.

The appliance must be permanently connected to installed pipes. The conductor cross-section must comply with the installed appliance power.

Caution: Earthed water pipes may give the appearance of a connected protective earth.

To guarantee compliance to relevant safety regulations, an all-pole separator must be fitted during installation. The contact opening must be at least 3 mm.

The continuous-flow heater is only suitable for closed (pressurised) operation.
The tap and outlet fittings must be approved for operation with closed (pressurised) continuous-flow heater systems.
- Only connect the continuous-flow heater to a cold water line.
The continuous-flow heater is suitable for connection to DVGW-tested plastic pipes.
■ Disconnect the electrical connection cable from the supply and shut off the water supply before connecting the appliance!
■ Connect the water supply and then connect the electrical supply.
Only make the openings which are required for installation on the rear of the appliance. If the appliance is reinstalled, the unused openings must be provided with watertight sealing.
- Do not touch electrically live parts after installation.
The appliance should be disconnected from the electrical mains supply when working on the water supply. After service work is complete, proceed as during the first-time appliance start-up.
No changes may be made to the appliance.
The appliance may only be used for heating drinking water for household use.
This appliance can be used by children aged 8 years and older as well as by persons with diminished bodily, sensory or mental perception, or those who lack knowledge or experience, if they are monitored or have received instruction concerning use and comprehend the possible dangers that can result. Children may not play with the appliance. Cleaning and maintenance by the user may not be performed by unsupervised children.
- Keep children away from the appliance.
- Please monitor children to ensure that they do not play with the appliance.
The mixer and the warm water pipe may be hot. Please inform and instruct children appropriately.

• Do not use aggressive or abrasive cleaning detergents!
• Do not use a steam cleaner.

The appliance is only to be descaled by a suitably qualified specialist.

Congratulations on purchasing this Siemens appliance. You have acquired a top-quality product, which will give you a lot of enjoyment.

Please read this installation and operating instruction manual carefully, then act accordingly! Store for future reference.

Installation instructions

Install the continuous-flow heater as described in the illustrated section. Observe the instructions in the text.

The illustrations can be found in the centre of the instruction manual.

Installation

I. Unpacking/removing the cover

• Unpack the appliance and check for transport damage.
  ■ Dispose of the packaging and, where applicable, the old appliance, in an environmentally conscious manner.

II. Preparation for installation

Important: Only use the enclosed installation set.

Shut off water supply. The electrical connection (connection cable) must be disconnected from the power supply. Unscrew the fuse or switch off the circuit breaker.

III. Wall mounting

The continuous-flow heater must be fitted securely to the wall. If required, secure the appliance using the lower adjusting screws.
The distance from the wall is variable. This allows you to compensate for any unevenness in the wall surface.
The sleeve must fit tightly round the connection cable. If the sleeve is damaged during installation, the holes must be sealed water-tight.

IV. Water connection

The continuous-flow heater must be vented. Open the warm water tap fully and flush out the appliance thoroughly for 1 minute.
- The flow-rate limiter must be installed in the old water regulating valve.

v. Electrical connection

The electrical supply terminal can be fitted at the top or bottom. The sheath of the connection cable must extend for at least 40 mm into the appliance.

Installation note

The installation of non plug-in ready appliances must be undertaken by the respective utility operator or by a qualified specialist company, who can also assist you when you are requesting the approval of the utility company for installation of the appliance.

VI. Startup

The device is compliant to IEC 61000-3-12.

At low water pipe pressure, check whether the II setting switches on even when water is drawn from several cold-water taps simultaneously. If not, remove the flow limiter (refer to additional information A).
- Instruct the user with regard to the operation of the continuous-flow heater.

A B Additional information

If the water pressure of the interior system is low, do not operate the continuous-flow heater at full power, but remove the flow limiter (Fig. A, 3.).
- Priority circuit for the combined operation of electric storage heaters (Fig. B).

Specifications

	DH12400	DH18400	DH21400	DH24400	DH40018	DH40021	DH40024
Rated power [kW]	13.2	18	21	24	18	21	24
Rated voltage	400 V3~	400 V3~	400 V3~	400 V3~	400 V3~	400 V3~	400 V3~
Economy setting e [kW]
1st stage	-	-	-	-	6	7	8
2nd stage	8	12	14	16	12	14	16
Intensive setting II [kW]
1st stage	-	-	-	-	9	10.5	12
2nd stage	12	18	21	24	18	21	24
Switch-on point [l/min]
1st stage	-	-	-	-	4.0	4.5	5.0
2nd stage	3.6	5.0	5.8	6.6	5.0	5.8	6.6
Mixed water [l/min] at rated power approx. 38 °C	6.6	9.9	11.6	13.2	9.9	11.6	13.2
approx. 50 °C (supply temperature 12 °C)	4.5	6.8	7.9	9.1	6.8	7.9	9.1
Minimum flow pressure of appliance* [MPa (bar)]
with flow limiter	0.03 (0.3)	0.07 (0.7)	0.08 (0.8)	0.09 (0.9)	0.07 (0.7)	0.08 (0.8)	0.09 (0.9)
without flow limiter	0.02 (0.2)	0.04 (0.4)	0.05 (0.5)	0.06 (0.6)	0.04 (0.4)	0.05 (0.5)	0.06 (0.6)
Application area in water specific electric resistance at 15 °C [Ωcm]	≥800	≥1300	≥1300	≥1300	≥1300	≥1300	≥1300
Rated pressure [MPa (bar)]	1 (10)	1 (10)	1 (10)	1 (10)	1 (10)	1 (10)	1 (10)
Maximum permissible supply temperature [°C]	20	20	20	20	20	20	20
Energy efficiency class	A	A	A	A	A	A	A
Load profile	S	S	S	S	S	S	S
Annual energy consumption [kWh]	480	481	483	483	481	483	483
Daily energy consumption [kWh]	2.213	2.215	2.228	2.232	2.215	2.228	2.232
Sound power level [dB]	15	15	15	15	15	15	15
Hot water heating energy efficiency [%]	38.4	38.4	38.2	38.1	38.4	38.2	38.1

* Plus any pressure loss at the tap mixer

Dimensions

Special accessories

BZ 45U20 Pipe set: for use of the continuous-flow heater as an under sink appliance
■ Priority switch (load shedding relay) BZ 45L21: for operation with the priority circuit
■ Mounting set BZ 45K23: for surface-mount installation

Operating instructions

Please read and observe the detailed safety instructions at the start of these instructions!

- Important: The appliance may never be exposed to frost!

Risk of electric shock!

Switch off the mains voltage supply immediately if a fault occurs.

- Immediately shut off the cold water supply to the appliance should it leak.

Getting to know your appliance

The continuous-flow heater heats the water as it flows through the appliance. The appliance only consumes power during this period.

Operating elements

The continuous-flow heater has two heat settings:

e Economy setting – two thirds power
II Intensive setting – full power

The e setting is ideal for:

Wash basin

Shower

Bidet

The II setting is used in combination with a thermostatically-controlled premixer, for high temperatures or for large volumes of water, e.g. for:

Dishwashing

Cleaning

Bath tub

Operating the appliance

Turn on the hot-water tap

The continuous-flow heater switches on and heats the water when the hot-water tap is turned on (Fig. E, 1.).

It switches off again when the tap is turned off.

Notes (not applicable for DH12...): When the water tap is turned on only slightly, the continuous-flow heater will operate at half power in both of the preselected settings (e, II). When the water tap is turned on fully, the appliance will operate at full, preselected power.

Increasing the water temperature

Slightly close the hot-water tap (Fig. E, 2.).

Decreasing the water temperature

Turn on the cold-water tap (Fig. E, 3.).

Startup after a water cutoff

• Disconnect the appliance from the mains supply (remove the fuses in the fusebox).
  ■ Turn on the hot-water tap until the air is purged from the pipe.
  ■ Reinstall the fuses.

The appliance is ready for operation.

Saving energy

Use the "e" setting whenever possible.

For wash basins: Open the corner valve to such an extent that only the lower heat setting switches on.

Winter operation

Note: It is possible in winter that the supply temperature of the water is reduced and the required outlet temperature is no longer achieved.

In order to compensate for this temperature reduction, please reduce the water quantity on the tap until the required water temperature is achieved.

Cleaning

Simply wipe the appliance with a damp cloth.

Do not use acidic or abrasive cleaning materials.

Notes: It is normally not necessary to descale the appliance. However, extremely hard water and the frequent flows of very hot water can cause the appliance to scale up. In this case please contact our after-sales service.

After-sales service

If you call the after-sales service for assistance, please specify the E no. and FD no. of your appliance.

These numbers are found on the inside of the swing-out control panel of the continuous-flow heater.

A fault, what to do?

Attention!

Repairs must only be carried out by an authorised technician. Improper repairs can lead to risk of serious injury to the user.

If your appliance does not operate as required, it is often due to a very minor problem. Please check whether you can remedy the fault yourself by using the following guidelines. You will save yourself the costs of an unnecessary visit by customer service personnel.

Fault	Cause	Solution	Who
Water flow-rate is too low. The appliance does not switch on.	The filter in either the water tap or the showerhead is clogged.	Remove the filter and either clean it or descale it.	Customer
	The filter in the corner valve is clogged.	Get a servicing expert to clean the filter.	Servicing expert
	The corner valve is clogged.	Turn on the hot-water tap fully and open and close the corner valve several times. Then clean the filter in the water tap.	Customer
The water is not sufficiently warm.	The fuse in the house electrical installation has tripped/blown.	Check the fuse in the fusebox.	Customer
	The appliance's automatic circuit breaker has been tripped.	Get the appliance's automatic circuit breaker checked by an electrician. Check the permissible supply temperature.	Servicing expert
	The power limit has been reached. Water flow-rate is too high and/or the cold water supply temperature is too low.	Reduce the flow-rate on the tap.	Customer
		By a qualified professional: use the corner valve to regulate the flow-rate. Check the flow-rate limiter or replace it with a smaller one.	Servicing expert
	The second stage in the appliance does not switch on (the audible "clicking" is missing).	Remove the filter in the tap and either clean it or descale it.	Customer
		Clean the filter in the corner valve (Fig. A, 4.).	Servicing expert
The continuous-flow heater switches off during the drawing-off of water, resulting in a reduction in the water temperature:	Swelling seal in the warm water tap	A non-swelling sealing material must be used in the warm water tap.	Customer
Winter operation: The desired water temperature leaving the tap is no longer reached.	The supply temperature has reduced.	Reduce the water flow on the taps until the desired water temperature is reached.	Customer

If the fault could not be eliminated, please call customer service.

Disposal

This appliance is labelled in accordance with European Directive 2012/19/EU concerning used electrical and electronic appliances (waste electrical and electronic equipment – WEEE).

The guideline determines the framework for the return and recycling of used appliances as applicable throughout the EU.

Please ask your specialist retailer about current disposal facilities.

Guarantee

The guarantee conditions for this appliance are as defined by our representative in the country in which it is sold.

Details regarding these conditions can be obtained from the dealer from whom the appliance was purchased. The bill of sale or receipt must be produced when making any claim under the terms of this guarantee.

Subject to change without notice.

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