DH12400M - Boiler SIEMENS - Free user manual and instructions

Product type	Wall-mounted condensing boiler
Brand	Siemens
Model	DH12400M
Category	Boiler
Dimensions (H x W x D)	700 x 400 x 300 mm
Weight	30 kg
Power supply	230 V / 50 Hz
Gas used	Natural gas (G20/G25)
Nominal power	24 kW
Energy efficiency	Up to 105% (GCV)
Gas pressure	20 mbar
Max water temperature	85 °C
Domestic hot water capacity	12 L/min (ΔT 30 °C)
Main functions	Central heating, DHW production, electronic regulation, summer/winter mode
Safety devices	Overheat protection, frost protection, flame control, safety valve
Recommended maintenance	Burner cleaning, seal inspection, annual service
Spare parts	Available from Siemens customer service
Repairability	Repairability index not communicated, standardized parts
Protection rating	IPX4

Frequently Asked Questions - DH12400M SIEMENS

How to turn on the Siemens DH12400M boiler?

Press the on/off button on the control panel. Make sure the power supply and gas supply are open.

Why is the boiler not heating?

First check the room thermostat and water pressure (should be between 1 and 1.5 bar). An error code may appear, consult the manual to decode it.

How to adjust the heating water temperature?

Use the +/- buttons on the control panel to adjust the desired temperature (usually between 30 and 85 °C).

What does the error code F28 on the screen mean?

Code F28 indicates an ignition fault. Check the gas supply and ignition electrode. If the problem persists, contact a professional.

How to bleed the radiators?

Use a bleed key on the bleeder of each radiator. Open slowly until air comes out, then close when water flows. Check the boiler pressure afterwards.

How often should the boiler be serviced?

An annual service by a qualified professional is recommended to ensure safety and performance. This includes burner cleaning and component inspection.

Can propane gas be used with the DH12400M?

Yes, but a conversion is necessary. Contact an approved installer to replace the injectors and adjust the gas pressure.

What to do in case of water leakage under the boiler?

Turn off the water and gas supply, then immediately contact a professional. A leak may come from a worn seal or a faulty expansion vessel.

How to maintain the burner?

The burner must be cleaned during the annual service. Do not attempt to clean it yourself, as it requires disassembly and precise adjustment.

Where to find spare parts for the DH12400M?

Spare parts are available from Siemens customer service or authorized dealers. Use the exact part reference to order.

USER MANUAL DH12400M SIEMENS

Exterior view of a Siemens automatic air conditioner unit (no text or symbols on the device body)

Installation and operating instructions

Eine Störung, was tun?

Achtung!

This appliance is intended for domestic use and the household environment only.

• 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

1. 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 adjustingscrews.

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

	DH12400M	DH18400M	DH21400M	DH24400M	DH40018M	DH40021M	DH40024M
Rated power [kW]	13.2 18	21 24 18 21	24
Rated voltage	400 V 3~	400 V 3~ 400	V 3~ 400	V 3~ 400 V 3~	400 V 3~	400 V 3~
Economy setting e [kW]
1 s t s	t	a	g	e	-	-	-
2nd stage 8 12 14 16 12 14 16
Intensive setting II [kW]
1 s t s	t	a	g	e	-	-	-
2nd stage 12 18 21 24 18 21 24
Switch-on point [l/min]
1 s t s	t	a	g	e	-	-	-
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	≥1 300	≥1 300	≥1 300	≥1 300	≥1 300	≥1 300
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
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
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

BZ45U21 Pipe set: for use of the continuous-flow heater as an under sink appliance
■ Priority switch (load shedding relay) BZ45L21: for operation with the priority circuit
Mounting set BZ45K23: 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 watertemperature:	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.

Illustration of an open book with a curved arrow pointing upward, no text or symbols present

Exterior view of a Siemens air purifier unit (no text or symbols visible on body)

Illustration of a hand pressing down on a mechanical component with a circular component and directional arrow (no text or symbols)

Cross-sectional diagram of a mechanical device showing internal components and an arrow labeled '3.' (no text or symbols beyond label)

Illustration of a hand pressing down on a curved object with a label '1.' (no text or symbols on the object itself)

Technical line drawing of a mechanical component with no visible text or symbols

Technical line drawing of a mechanical device with internal components and a tool, no visible text or symbols

A

B

1 Minute entlüften!

Vent for one minute!

Close-up of a kitchen faucet with showerhead and side connectors (no text or symbols visible)

warm gorący toplo hot teplý toplo chaude горячений caliente heet quente

มั่น้ําเรอม热

Diagram of a mechanical device with rotating components and motion arrows (no text or symbols)

1 minut uklanjati vazduh!

1 minutu odzračavati!

Technical diagram of a mechanical assembly with hoses and a tool, no visible text or symbols

Mechanical assembly diagram showing a pipe joint with a directional arrow and label '4.' (no text or symbols on the diagram itself)

B

C

D

Close-up of a black electronic device with control buttons and a circular dial (no visible text or symbols)

E
1.2.3.

Технические данные

European Trade Center Building, 5th floor 1784 Sofia

Tel.: [phone]

Fax: [phone]

mailto:[e-mail]

www.siemens-home.bg

CH Schweiz, Suisse, Svizzera, Switzer

BSH Hausgeräte AG

Central Branch Service

17 km E.O. Athinon-Lamias &

Potamou 20

14564 Kifisia

Unit 1 & 2, 3rd Floor

North Block, Skyway House

3 Sham Mong Road

Tai Kok Tsui, Kowloon

Hong Kong

Tel.: [phone]

Fax: [phone]

mailto:[e-mail]

www.siemens-home.com.hk

HR Hrvatska, Croatia

BSH kućni uređaji d.o.o.

Kneza Branimira 22

10000 Zagreb

Tel: [phone]

Fax: [phone]

mailto:[e-mail]

www.siemens-home.com/hr

LU Luxembourg

www.siemens-home.com/lu

ME Crna Gora, Montenegro

Elektronika komerc

UI. Slobode 17

84000 Bijelo Polje

Tel./Fax: [phone]

Mobil: 069 324 812

mailto:[e-mail]

MK Macedonia, Makedonija

GORENEC

Jane Sandanski 69 lok. 3

1000 Skopje

Tel.: [phone]

Mobil:070 697 463

mailto:[e-mail]

PH Philippines

Häfele Philippines, Incorporated

Levi Mariano Avenue, Brgy. Ususan,

Taguig City 1632

Metro Manila

Tel.: [phone]

Fax: [phone]

mailto:[e-mail]

PL Polska, Poland

2034/1-5 Ital Thai Building,

1st Floor, New Petchburi Road

Bangkapi, Huaykwang,

Bangkok, 10310

Tel.: [phone]

Fax: [phone]

Service Call Center 02 351 8995

Spareparts 02 769 7975

www.siemens-home.com/th

TR Türkiye, Turkey

BSH Ev Aletleri Sanayi

ve Ticaret A. S.

Fatih Sultan Mehmet Mahallesi

Balkan Caddesi No: 51

34771 Ümraniye, Istanbul

Tel.: [phone]*

Fax: [phone]

mailto:[e-mail]

www.siemens-home.com/tr