E-comfort instant water heater
DEX Next L

Energy efficiency class A

(Scale: A+ to F)

DEX Next L: 18/21/24/27 kW, 400 V

Technical data
Downloads
Accessories

This is where the DEX Next L is used.

Handwashbasin
Shower
Bath tub
Kitchen sink

Beautiful views: stepless hot water.

New product
The DEX Next L is conveniently controlled via an LED display with sensor buttons. The two memory keys are preset to 38 °C and 42 °C and can be individually adjusted. Unit parameters can be read out and set via a service menu.

Awards E-comfort instant water heater DEX Next L

Electronically controlled comfort instantaneous water heater with sensor control panel and LED display
Precise temperatures between 20 °C and 60 °C thanks to TWIN TEMPERATURE Control TTC.
Particularly air-resistant heating system thanks to innovative heating channel arrangement
Bare-wire heating system IES ensures a longer service life, less calcification and is efficient and easy to maintain
Electronic safety system with air bubble detection, temperature and pressure shut-off
Multiple Power System MPS determines the maximum power consumption at installation: 18, 21, 24 or 27 kW, 400 V
Easy installation thanks to free installation space and variable connection options
Suitable for water-saving fittings: particularly low switch-on water quantity from 1.5 l/min thanks to innovative water flow technology
Dimensions (height × width × depth): 46.8 × 23.9 × 9.6 cm

Technical data

Data. Values. Facts.



DEX Next L

Part number

Nominal power rating ¹⁾ (variably adjustable due to MPS) at 400 V [kW]

Permissible operating pressure [MPa (bar)] ²⁾

Water connections (thread connections)

Hot water output at Δt = 28 K ³⁾ [l/min]

Switch-on flow rate [l/min]

Maximum flow rate ⁴⁾ [l/min]

Supply voltage [3~ / PE 400 V AC] Permanent connection ⁵⁾

Nominal current at 400 V [A]

Required cable diameter [mm²]

Maximum inlet temperature [°C]

Protection class

Specific water resistance at 15 °C [Ωcm] ≥

Weight filled with water [kg], approx.

3200-36451
18	21	24	27
1 (10)	1 (10)	1 (10)	1 (10)
G ½"	G ½"	G ½"	G ½"
9.2	10.7	12.3	13.8
1.5	1.5	1.5	1.5
8.0	8.0	8.0	8.0

26	30	35	39
4.0	4.0	6.0	6.0
30	30	30	30
IP 25	IP 25	IP 25	IP 25
1100	1100	1100	1100
4.2	4.2	4.2	4.2

1) The selected power rating determines the values of nominal current, cable diameter and hot water output

2) Also approved for pressureless operation

3) Temperature increase e.g. from 12 °C to 40 °C, mixed water

4) Limited flow amount for optimal temperature increase

5) Alternatively connectable to 380 V

Downloads

	Media type	Title	Date	Size
Operating and installation instructions DEX-Next-L-Online-GMA-de-en-fr-nl-pt-es-pl-ru-cs-sk-bg-sr-03-2023.pdf 15.03.2023 > download	Operating and installation instructions	DEX-Next-L-Online-GMA-de-en-fr-nl-pt-es-pl-ru-cs-sk-bg-sr-03-2023.pdf	15.03.2023	38,8 MB > download
Quick guide DEX-Next-L-KA-de-en-fr-nl-pt-es-pl-ru-cs-sk-bg-sr.pdf 13.01.2023 > download	Quick guide	DEX-Next-L-KA-de-en-fr-nl-pt-es-pl-ru-cs-sk-bg-sr.pdf	13.01.2023	6,4 MB > download
Energy label DEX-Next-L-Energielabel-2023.pdf 28.03.2023 > download	Energy label	DEX-Next-L-Energielabel-2023.pdf	28.03.2023	231 kB > download
ErP product sheet DX3.1-DEX-Next-L-ErP-Produktdatenblatt.pdf 27.03.2023 > download	ErP product sheet	DX3.1-DEX-Next-L-ErP-Produktdatenblatt.pdf	27.03.2023	98 kB > download

Accessories

RDX 3 (optional)

If required, the universal mounting frame RDX 3 is available as an accessory, with which the electrical connection can be made at any point behind the device. The IP protection class of the device with RDX 3 is IP24. With electrical wiring and pipe extensions. For difficult installation conditions, e.g. replacement of a flow heater with different connections. Compensates for tile projections or wall unevenness. Installation only by a specialist.

RDX 3: Part no. 3200-36100