DES 2427 - Boiler DIMPLEX - Free user manual and instructions

Product Type	Electronically controlled instantaneous water heater
Brand	Dimplex
Model	DES 2427
Rated Power	24 / 27 kW (selectable)
Rated Voltage	400 V three-phase
Fuse Protection	40 A
Minimum Cable Cross-Section	6 mm²
Hot Water Flow Rate (ΔT 30°C, without limiter)	13.0 / 14.6 L/min
Hot Water Flow Rate (ΔT 30°C, with limiter)	9.3 L/min
Activation Flow Rate	2.5 L/min
Activation Flow Pressure	0.009 MPa (0.09 bar)
Minimum Specific Water Resistance	1300 Ωcm
Rated Pressure	1.0 MPa (10 bar)
Maximum Inlet Temperature	55 °C
Energy Efficiency Class	A
Load Profile	S
Annual Electricity Consumption	479 kWh
Sound Power Level	15 dB
Hot Water Preparation Energy Efficiency	38.5 %
Protection Class	I (mandatory earth connection)
Installation Type	Wall-mounted, closed circuit (pressure-resistant)
Electrical Connection	All-pole disconnection device (min. 3 mm contact opening)
Maintenance	Clean with a soft cloth, no aggressive detergents or steam cleaners
Special Accessories	Plaster mounting kit, load shedding relay BZ 45L21, tubular assembly for under-sink

Frequently Asked Questions - DES 2427 DIMPLEX

What type of water should be used with the DES 2427?

The water heater can be connected to a cold water supply or preheated water (DES only). The specific water resistance must not be less than 1300 Ωcm. Ask your water utility operator for the value.

How to bleed the appliance before first use?

Fully open the hot water tap and let the water run for at least 1 minute. For safety reasons, the appliance does not heat during this period.

What is the maximum power of the appliance?

The DES 2427 offers two selectable rated powers: 24 kW or 27 kW. Set it using the power selector switch before electrical connection.

Can the appliance be installed outdoors?

No, the appliance must be installed and stored in a frost-free room. It is designed for use at up to 2000 m altitude maximum.

What to do if the appliance does not heat?

First check the flow rate: if it is below 2.5 L/min, the appliance does not activate. Remove the flow restrictor or shower head to increase the flow. If the problem persists, contact a technician.

What electrical cable should be used?

The minimum cable cross-section is 6 mm² for a 40 A fuse protection. Use a cable suitable for the power and installation type.

Is the appliance compatible with plastic pipes?

Yes, it can be used with certified DVGW plastic piping.

How to clean the water heater?

Do not use aggressive detergents or steam cleaners. Simply wipe with a soft, dry cloth.

What is the maximum inlet water temperature?

The inlet temperature must not exceed 55°C. If it reaches 60°C, the safety device will trip and cut off the appliance.

Can I use this appliance with water preheated by solar panels?

Yes, the DES 2427 is compatible with preheated water up to 55°C. For higher temperatures, a thermostatic mixing valve is required.

USER MANUAL DES 2427 DIMPLEX

White industrial water heater unit with 'ICDimplex Twin-power' label and control knob (no additional text or symbols)

BCDimplex twin-power solar 38.5°C

Dimplex

Montageanweisung

Installation Instructions

Electronically-regulated Continuous-flow heater

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.

Safety information

Please read this installation instruction manual carefully, then act accor dingly! Store for future reference. These installation instructions must be included when transferring this appliance to a new owner.

The appliance may only be connected and put into operation by a qualified professional.
- 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.
The supplied water connection nozzles must be used and installed as shown in the supplementary sheets. Make sure that a check valve is installed in the cold water supply line.
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. Disconnect the power supply before opening the appliance. Immediately shut off the cold water supply to the appliance should it leak.

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.

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

The appliance must be permanently connected to installed pipes. The conductor cross-section must comply with the installed appliance power.
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.
The continuous-flow heater can be operated with cold or pre-warmed water (only applies to DES). Observe the technical data and the special accessories for this purpose.
The water's specific electrical resistivity must not be less than 1 300 Ωcm. Ask the local water utility company regarding the electrical resistivity of the water.
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.
- Do not use aggressive or abrasive cleaning detergents!
- Do not use a steam cleaner.

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

Installation instructions

These installation instructions apply to various continuous-flow heater appliance models. Therefore the illustrations may deviate from the device you bought.

- Install the appliance as shown in the illustrations. The illustrations can be found in the centre of the instruction manual. Observe the instructions in the text.

Installation

1. Unpacking/Removing the cover

• Unpack the appliance and check for transport damage. If any components are damaged, then do not connect the appliance.
  Check that your appliance contains all components included in the scope of delivery: appliance, installation set with supplementary sheets, installation instructions, operating instructions.
• Please dispose of the packaging and the old appliance in an environmentally-friendly manner.
• When removing the cover, please note the following: The cover is fastened by a central closure behind the serviceflap.

II. Preparations for installation

Important: Only use the supplied installation set.

The supplied water connection nozzles must be installed!

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.
- Install the water connection nozzles according to the instructions on the supplementary sheet.
The electrical connection cable can either be guided in at the top (X) or bottom (Y).
The rear panel must lie against the cold water connection nozzle in the position provided for such (Fig. II., 8.).

III. Wall mounting

The grommet must tightly surround the connection cable. If it is damaged during mounting, the openings must be provided with watertight sealing.
The electrical supply terminal can be fitted at the top (X) or bottom (Y). The sheath of the connection cable must extend for at least 40 mm into the appliance.
The distance to the wall is variable. You can compensate for any unevenness of the wall's surface. With a distance to the wall of 8–16 mm, insert the spacer and install the extender (Fig. III., 3. – 5.).
The appliance must be mounted securely on the wall. If necessary, attach it at the lower adjustable screws (Fig. III., 6.).

IV. Water connection

■ Connect the water supply, then open the cold water supply.
The appliance must be vented. To do so, open the warm water tap fully and flush out the appliance thoroughly for 1 minute.

v. Electrical connection/Mounting

Only for appliances with power selector switches: Set the power using the power selector switch before connecting the wires to the mains connection terminal: Nominal output power left, reduced output right (Fig. V., 1.) and the set output marked on the ratings plate.
- Screw the wires tightly into the mains connection terminal.
■ Switch on the safety limiter (Fig. V., 3.)
■ Install the cover (Fig. V., 4. -7.).

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.

First start-up

■ Switch on the fuses.
Setting the temperature.
Initial rinsing: Open the warm water tap fully and allow water to flow for at least 1 minute. Only then (for safety reasons) will the appliance begin to heat.

Tip: Should the appliance not start because of a reduced flow-rate, remove the perlator, shower head or similar before start and repeat the process.

- Explain the operation of the appliance to the user.

VII. Additional information

If the appliance does not have sufficient water flow due to low water line pressure in your domestic plumbing system, remove the flow-rate limiter (Fig. VII., 1. - 3.).
Priority circuit for the combination with electrical storage heaters: For operation with a priority circuit, a special load shedding relay BZ 45L21 (special accessory) is required. Other existing load shedding relays, with the exception of electronic load shedding relays, may malfunction (Fig. VII., Wiring diagram).
The control electronics must be coded when operated with a load shedding relay. Remove the keying nose on the electronics (Fig. VII., 4.).

Technical data

		DEE 1113 DEE 1821	DEE 2427
Rated output	[kW] 11/13 18/21 24/27
Rated voltage	[V] 400 400 400
Fuse protection [A]		16/25	32 40
Minimum conductor cross-section *	[mm2] 1.5/2.5	4 6
Warm water flow at rated output with temperature increase from 12 °C to 38 °C (without flow-rate limiter)	[l/min]	6.0/7.1	9.8/11.6	13.0/14.6
12 °C to 38 °C (with flow-rate limiter)	[l/min]	5	7.6	9.3
12 °C to 60 °C	[l/min]	3.3/3.8	5.3/6.2	7.1/7.9
Start-up flow	[l/min] 2.5 2.5	2.5
Start-up flow pressure **	[MPa (bar)]	0.009 (0.09) 0.009 (0.09)	0.009 (0.09)
Application area in water specific electric resistance at 15 °C	[Ωcm] ≥ 1 300	≥ 1 300	≥ 1 300
Rated pressure	[MPa (bar)]	1.0 (10)	1.0 (10)	1.0 (10)
Maximum permissible supply temperature	[°C]	20 20 20
Maximum mains impedance at connection point	[Ω]	0.433	0.067/0.104 0.067/0.104
Energy efficiency class		A	A	A
Load profile		S	S	S
Annual energy consumption	[kWh]	477 479 479
Daily energy consumption	[kWh]	2.196 2.203	2.207
Sound power level	[dB]	15 15 15
Hot water heating energy efficiency	[%]	38.6	38.5	38.5

		DES 1821	DES 2427
Rated output	[kW] 18/21	24/27
Rated voltage	[V] 400	400
Fuse protection [A] 32	40
Minimum conductor cross-section *	[mm2]	4	6
Warm water flow at rated output with temperature increase from 12 °C to 38 °C (without flow-rate limiter) 12 °C to 38 °C (with flow-rate limiter) 12 °C to 60 °C	[l/min] [l/min] [l/min]	9.8/11.6 7.6 5.3/6.2	13.0/14.6 9.3 7.1/7.9
Start-up flow	[l/min] 2.5	2.5
Start-up flow pressure **	[MPa (bar)]	0.009 (0.09)	0.009 (0.09)
Application area in water specific electric resistance at 15 °C	[Ωcm] ≥ 1 300	≥ 1 300
Rated pressure	[MPa (bar)]	1.0 (10)	1.0 (10)
Maximum permissible supply temperature	[°C]	55	55
Maximum mains impedance at connection point	[Ω]	0.067/0.104	0.067/0.104
Energy efficiency class		A	A
Load profile		S	S
Annual energy consumption	[kWh]	479	479
Daily energy consumption	[kWh]	2.203	2.207
Sound power level	[dB]	15	15
Hot water heating energy efficiency	[%]	38.5	38.5

* Larger cable cross-sections may be required depending on the connection configuration.
** The pressure loss on the mixer must also be added.

Solar heated

Only for appliances that are suitable for solar heating systems:

The appliance can only heat prewarmed water to a max. of 60 °C . If the cold water supply exceeds a temperature of 55 °C , the water will not be warmed any further.

Important: The cold water supply temperature must not be higher than 55 °C!

If the cold water supply exceeds a temperature of 60 °C , a circuit breaker will trigger and shut the appliance off. Therefore, the residential plumbing must be equipped with a thermostatic premixer that will limit the cold water supply temperature to a max. of 55 °C by appropriately mixing in cold water.

Dimensions

Special accessories

• Pipe kit DLE 02RBS for use of the appliance as an undersink appliance
• Priority switch (load shedding relay) Siemens BZ 45L21: for operation with a priority circuit
  ■ Mounting kit DLE 02AP: for surface mount installation

Environmentally-friendly 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.

Subject to change without notice.

Product fiche concerning the "Commission delegated regulation (EU) No 812/2013"

Trade mark: Dimplex	Trade mark: Dimplex
Model Identifier: DEE 1113 / DEE 1821 / DEE 2427	Model Identifier: DES 1821 / DES 2427
Load profile: S	Load profile: S
Energy efficiency class: A	Energy efficiency class: A
Energy efficiency class: 38.6/38.5/38.5%	Energy efficiency class: 38.5 / 38.5 %
Annual electricity consumption: 477/479/479 kWh	Annual electricity consumption: 479 / 479 kWh
Further possible load profiles:Load profile: –Energy efficiency class: –Annual electricity consumption: –	Further possible load profiles:Load profile: M / MEnergy efficiency class: 39.0 / 39.0 %Annual electricity consumption: 1 321 / 1 324 kWh
Thermostat temperature settings (factory setting): 60 °C	Thermostat temperature settings (factory setting): 60 °C
Sound power level: 15 dB	Sound power level: 15 dB
All specific precautions that shall be taken when the water heater is assembled, installed or maintained are described in the installation and operating instructions.	All specific precautions that shall be taken when the water heater is assembled, installed or maintained are described in the installation and operating instructions.

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

1. 

1a.

1b.

2b. 2a. ca. 30°

3. 4. 4. 4.

3D mechanical assembly diagram showing internal components and wiring, labeled with number 5.1 (no readable text or symbols)

1. 2. 3a. 3b.

a b c 4.

b c 5.

6. 8. XY ca. 96 70 b+c 7. 44 332 388 100

2. a 1. X Y 1. Y 0 mm min. 40 mm !

X

ca. 2-8 mm 40 mm

X

ca.8-16mm 40 mm

3.

Ø 6 mm 4.

5. 6.

Technical diagram showing exploded view of a mechanical assembly with numbered components and labeled parts in Chinese

1 Minute entlüften!

Vent for one minute!

Illustration of a stainless steel faucet with water level indicator (no text or symbols)

Circular white knob with a black arrow pointing to the center, labeled '2.' (no text or symbols on the knob itself)

3. 4.

VII.

Close-up of a mechanical device with a circular arrow and cross mark, no visible text or symbols

Close-up of a mechanical component with a hand holding a tool, no visible text or symbols

Two mechanical components: a spherical component with cross-shaped features and an threaded cylindrical part, both without any visible text or symbols.

L 3 L 2 L 1 PE PE 3 2 1

4.

Exterior view of a white industrial water heater unit with control knob (no visible text or symbols)

Exterior view of a modern white appliance with a digital display showing 385°F, no visible text or symbols on the device itself.

236 20 472 332 388 100 42 99 21,3 (G1/2A) 115

Mode solaire