STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous Water Heater Instruction Manual

June 13, 2024
STIEBEL ELTRON

STIEBEL ELTRON logo OPERATION AND INSTALLATION Hydraulically controlled
compact instantaneous water heater
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Special Information

  • The appliance may be used by children aged 3 and older and persons with reduced physical, sensory or mental capabilities or a lack of ex- perience and know-how, provided that they are supervised or they have been instructed on how to use the appliance safely and have understood the potential risks. Children must never play with the appliance. Cleaning and user maintenance must not be carried out by children without supervision.
  • During operation, the tap can reach temper- atures in excess of 60 °C. There Is a risk of scalding at outlet temperatures in excess of 43 °C.
  •  The appliance is not suitable for supplying a shower (shower operation).
  • Ensure the appliance can be separated from the power supply by an tsolator that discon- nects all poles with at least 3 mm contact separation.
  • The specified voltage must match the power supply.
  • The appliance must be connected to the earth conductor.
  • The appliance must be permanently connect- ed to fixed wiring.
  • Secure the appliance as described in chapter “Installation / Installation’.
  • Observe the maximum permissible pressure (see chapter “Installation / Specification / Data table”).
  • Drain the appliance as described in chapter “Installation / Maintenance / Draining the appliance’.
  • This appliance is not approved for reheating preheated water.

General information

The chapters “Special information” and “Operation” are intended for appliance users and qualified contractors.
The chapter “Installation” is intended for qualified contractors.
Ri
Read these instructions carefully before using the appli- ance and retain them for future reference.
Pass on these instructions to a new user if required.
1.1 Safety instructions
1.1.1 Structure of safety instructions
KEYWORD Type of risk
Here, possible consequences are listed that may result from failure to observe the safety instructions.

  • Steps to prevent the risk are listed.

1.1.2 Symbols, type of risk

Symbol Type of risk
Injury
Electrocution
Burns (burns, scalding)

1.1.3 Keywords

KEYWORD Meaning
DANGER Failure to observe this information will result in serious injury or

death.
WARNING| Failure to observe this information may result in serious injury or death.
CAUTION| Failure to observe this information may result in non-seri- ous or minor injury.

1.2. Other symbols in this documentation

Note
**** General information Is identified by the adjacent symbol.

  • Read these texts carefully.
Symbol Meaning
Material losses (appliance damage, consequential losses and environmen- tal

pollution)
****| Appliance disposal

  • This symbol indicates that you have to do something. The ac- tion you need to take is described step by step.

1.3 Units of measurement
Note
All measurements are given in mm unless stated oth- erwise.

Safety

2.1 Intended use
This pressure appliance is designed to heat DHW. The appliance can supply one or more draw-off points.
The appliance is intended for domestic use. It can be used safely by untrained persons. The appliance can also be used in non-do- mestic environments, e.g. in small businesses, as long as It Is used in the same way.
Any other use beyond that described shall be deemed inappro- priate. Observation of these instructions and of the instructions for any accessories used is also part of the correct use of this appliance.
Note
This appliance is not approved for reheating preheated water.
2.2. General safety instructions
** CAUTION Burns
During operation, the tap can reach temperatures in ex- cess of 60 °C.
There is a risk of scalding at outlet temperatures in ex- cess of 43 °C.
WARNING Injury
The appliance may be used by children over 3 years of age and persons with reduced physical, sensory or men- tal capabilities or a lack of experience and expertise, provided that they are supervised or they have been instructed on how to use the appliance safely and have understood the potential risks. Children must never play with the appliance. Cleaning and user maintenance must not be carried out by children without supervision.
Material losses
The user should protect the appliance and Its tap against frost.
2.3 Test mark
** See type plate on the appliance.

Appliance description

The hydraulically controlled instantaneous water heater heats the water as it flows through the appliance. When a tap is opened, the appliance starts heating automatically at the selected output as soon as the starting flow rate is exceeded (see chapter “Installa- tion / Specification / Data table”). You can adjust the DHW amount and temperature at the tap by mixing in cold water.
You can choose between 2 output stages. At stage 2, the hydraulic control system regulates the electrical output automatically in two output stages, subject to the flow rate.
The flow meter compensates for pressure fluctuations. The flow meter ensures largely stable temperatures. The control unit limits the flow rate, thereby ensuring an adequate increase in the DHW temperature at all times.
Heating system
The tubular heater heating system has a pressure-tested copper cylinder. The heating system is suitable for soft water areas (for application range, see chapter “Installation / Specification / Data table”).

Settings

![STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous Water Heater

  • Seatting](https://manuals.plus/wp-content/uploads/2023/09/STIEBEL-ELTRON- DHF-18-C-Hydraulically-Controlled-Instantaneous-Water-Heater-Seatting.png)

    1. 1 Partial output:
      This setting is suitable for hand washing at a basin, for ex- ample. At low flow rates, the appliance starts heating at half the selected output.

    2. Full output:
      This setting is suitable for showers and washing up, for ex- ample. At low flow rates, the appliance starts heating at half the selected output and at higher flow rates, the full selected output.

      Click the output selector into the required position.

For starting flow rates, see chapter “Specification / Data table / ON”.
4.1 Recommended tap/valve settings
**Note
If the outlet temperature is not high enough when the draw-off valve is fully open at full output, then more water Is flowing through the appliance than can be heat- ed by the heating system (appliance is at its output limit).
Reduce the water volume at the draw-off valve.
Low draw-off rate = high outlet temperature
High draw-off rate = low outlet temperature
Twin lever tap**

Output stage Application range
Partial output Washbasin
Full output Bath, sink

Add cold water if the temperature is too high when the tap Is fully open.
Mono lever tap

Output stage  Application range
Full output All

Turn the tap lever to the highest temperature.
Fully open the tap.
Increase the outlet temperature by closing the tap slowly.
Reduce the outlet temperature by adding cold water or open- ing the tap further, if possible.
Recommended setting for operation with a thermostatic valve
Set the output selector to full output.
Following an interruption of the water supply
Material losses
To ensure that the tubular heater heating system is not damaged following an interruption to the water supply, the appliance must be recommissioned by taking the fol- lowing steps.
Disconnect the appliance from the power supply by removing the fuses/tripping the MCBs.
Open the tap for one minute until the appliance and its upstream cold water supply line are free of air.
Switch on the power supply again.

Cleaning, care and maintenance

Never use abrasive or corrosive cleaning agents. A damp cloth is sufficient for cleaning the unit.
Check the taps regularly. Limescale deposits at the tap out- lets can be removed using commercially available descaling agents.
Troubleshooting

Problem Cause Remedy
The appliance will not Start despite the DHW valve being fully open. There is
no power. Check the fuses / MCBs in  your fuse box / distribu-  tion board.

The flow rate is too low heating at the selected
output. The aerator in the tap is scaled up or dirty| Clean and/or descale the for the appliance to start aerator.

lf you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial number from the type plate (000000-0000-00000).STIEBEL ELTRON DHF 18 C Hydraulically
Controlled Instantaneous Water Heater - Trableshutting

Safety
Only a qualified contractor should carry out installation, commis- sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational reliability only if original accessories and spare parts intended for the appliance are used.
Material losses
Observe the maximum inlet temperature. Higher tem- peratures may damage the appliance. You can limit the maximum inlet temperature by installing a central ther- mostatic valve.
7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations and instructions.
Protection rating IP 24 (splashproof) can only be guaranteed with a correctly fitted cable grommet.

Appliance description

8.1 Standard delivery
The following are delivered with the appliance:

  • Wall mounting bracket
  • Installation template (in the centre section of these instructions)
  • 2twin nipples
  • 3-way ball shut-off valve for cold water
  • Tee for domestic hot water
  • Flat gaskets
  • Strainer
  • Plastic profile washer
  • 2 cover guides (for surface-mounted installation)

8.2 Accessories
Taps

  • MEKD mono lever kitchen pressure tap
  • MEBD mono lever bath pressure tap
  • WSH 10 / WSH 20 washbasin sensor tap

Water plugs G 1/2 A
lf you use surface-mounted pressure taps other than those recom- mended in the accessories, please use the water plugs.
Installation set, surface-mounted

  • Solder fitting – copper pipe for a ∅ 12 mm solder connection
  • Press fitting – copper pipe

Load shedding relay (LR 1-A)
The load shedding relay for installation in the distribution board provides priority control for the instantaneous water heater when other appliances, such as electric storage heaters, are being op- erated simultaneously.

Preparation

9.1 Installation site
Material losses
Install the appliance in a room free from the risk of frost.
Always install the appliance vertically and near the draw-off point.
The appliance is suitable for undersink and oversink installation.
Undersink installationSTIEBEL ELTRON DHF 18 C Hydraulically Controlled
Instantaneous Water Heater - Preparation

  1. Cold water inlet
  2. DHW outlet

Oversink installationSTIEBEL ELTRON DHF 18 C Hydraulically Controlled
Instantaneous Water Heater - Preparation 1

  1. Cold water inlet |
  2. DHW outlet

Note
Mount the appliance on the wall. The wall must have sufficient load bearing capacity.
9.2 Minimum clearances
![STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous Water Heater

Maintain the minimum clearances to ensure trouble-free op- eration of the appliance and facilitate maintenance work.

9.3. Water installation

Never operate with preheated water.

Flush the water line thoroughly.

Flow rate

Ensure that the flow rate required to switch on the appliance is achieved (see chapter “Installation / Specification / Data table / ON”). If the required flow rate is not achieved when the draw-off valve is fully opened, increase the water line pressure.

Taps

Use appropriate pressure taps. Open vented taps are not per- missible.

Thermostatic pressure valves must be suitable for hydraulically controlled instantaneous water heaters.

Note

Never use the 3-way ball shut-off valve in the cold water

inlet to reduce the flow rate. The 3-way ball shut-off valve

is intended only to shut off the cold water inlet.

Permissible water line materials

– Cold water supply line:

Pipes made from galvanised steel, stainless steel, copper or plastic

Material losses

If you use plastic pipework in the cold water supply line, you must observe the following condition:

Install a metal pipe approx. 1 m in length at the ap- pliance cold water connection. Then you can install the plastic pipework.
– DHW outlet line:
Stainless steel pipe or copper pipe
Material losses
The instantaneous water heater is unsuitable for installa- tion with plastic pipework in the DHW outlet line.
Flexible water connection lines.
Note
If installing the appliance with flexible pipe connections, you must secure the back panel with an additional screw.

Installation

10.1 Standard installation

  • Electrical connection from below, flush-mounted

  • Water connection, flush-mounted
    For further installation options, see chapter “Installation / Instal- lation / Installation alternatives’:

  • Electrical connection, surface-mounted

  • Connecting a load shedding relay

  • Water installation, surface-mounted

Opening the applianceSTIEBEL ELTRON DHF 18 C Hydraulically Controlled
Instantaneous Water Heater - Preparation 3 Turn the cap anti- clockwise. Remove by pulling it forward.
Undo the screw.
Pivot open the appliance cover.
Preparing the power cable
![STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous Water Heater

  • Preparation 4](https://manuals.plus/wp-content/uploads/2023/09/STIEBEL- ELTRON-DHF-18-C-Hydraulically-Controlled-Instantaneous-Water-Heater- Preparation-4.png) Installing the twin nipples
    Material losses
    Carry out all water connection and installation work in accordance with regulations.STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous
Water Heater - Preparation 5 Seal and insert the twin nipples.
    Making the water connectionSTIEBEL ELTRON DHF 18 C Hydraulically
Controlled Instantaneous Water Heater - Preparation 6

    1. HW with tee
    2. Gasket
    3. Cold water with 3-way ball shut-off valve
    4. Strainer
    5. Plastic profile washer
      Secure the tee and 3-way ball shut-off valve, each with a flat gasket, to the twin nipple.
      Fit the supplied strainer and the plastic profile washer in the 3-way ball shut-off valve.

Material losses
The strainer must be fitted for the appliance to function.
When replacing an appliance, check whether the strainer is installed.
Fitting wall mounting bracket and applianceSTIEBEL ELTRON DHF 18 C
Hydraulically Controlled Instantaneous Water Heater -
Instalattion

  1. Wall mounting bracket
  2. Threaded stud
  3. Threaded bush

Remove the wall mounting bracket.
 Mark out the drill holes with the installation template (in the centre section of these instructions). If the appliance Is to be installed with surface-mounted water connections, also mark out a fixing hole in the lower part of the template.
Drill the holes and secure the wall mounting bracket with 2 screws and 2 rawl plugs. The screws and rawl plugs are not part of the standard delivery.
Fit the wall mounting bracket.
Mount the appliance on the threaded stud.
Push the back panel firmly against the wall. Secure the back panel using the threaded bush. You can compensate for a tile offset with the nut on the threaded stud.
Installation with offset tilesSTIEBEL ELTRON DHF 18 C Hydraulically
Controlled Instantaneous Water Heater - Instalattion 1 Fitting the cable grommetSTIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous
Water Heater - Instalattion 2

  1. Cable grommet
    Fit the cable grommet.

![STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous Water Heater

  • Instalattion 3](https://manuals.plus/wp-content/uploads/2023/09/STIEBEL- ELTRON-DHF-18-C-Hydraulically-Controlled-Instantaneous-Water-Heater- Instalattion-3.png) Remove the transport protection plugs from the appliance pipe connections.
    Fit the pipe connections with flat gaskets onto the water connections.
    Making the electrical connection
    WARNING Electrocution Carry out all electrical connection and installation work in accordance with relevant regulations.
    WARNING Electrocution Connection to the power supply is only permissible in the form of a permanent connection in conjunction with the cable grommet. Ensure the appliance can be separated from the power supply by an isolator that disconnects all poles with at least 3 mm contact separation.
    WARNING Electrocution Ensure that the appliance is connected to the earth con- ductor.
    Material losses
    Observe the type plate. The specified rated voltage must match the power supply.
    Connect the power cable to the mains terminal (see chapter “Installation / Specification / Wiring diagram’).
    10.2 Installation alternatives
    10.2.1 Electrical connection, surface-mounted
    Material losses
    If you break open the wrong knock-out in the appliance cover by mistake, you must use a new appliance cover.
    Cleanly cut or break out the required cable entry in the ap- pliance cover (for positions, see chapter “Installation / Spec- ification / Dimensions and connections’). If necessary, use a file.
    Route the power cable through the cable grommet. Connect the power cable to the mains terminal.
    10.2.2 Connecting a load shedding relay
    Install a load shedding relay in the distribution board in conjunc- tion with other electric appliances, e.g. electric storage heaters.
    The relay responds when the instantaneous water heater starts.
    Material losses
    Connect the phase that switches the load shedding relay to the indicated terminal of the mains terminal in the ap- pliance (see chapter “Installation / Specification / Wiring diagram’).
    10.2.3 Water installation, surface-mountedSTIEBEL ELTRON DHF 18 C
Hydraulically Controlled Instantaneous Water Heater - Instalattion
4 To seal the flush-mounted connection, fit the water plugs with gaskets.
    Fit a suitable pressure tap.STIEBEL ELTRON DHF 18 C Hydraulically
Controlled Instantaneous Water Heater - Instalattion 5

    1. Openings
    2. Cover guides
    3. Lower fixing screw

Material losses
If you cut open the wrong knock-out in the appliance cover by mistake, you must use a new appliance cover.
Secure the back panel with an additional screw at the bottom.
Secure the connection pipes to the tee and the 3-way ball shut-off valve.
Cleanly break out the knock-outs in the appliance cover. If necessary, use a file.
Click the cover guides into place in the openings.
10.3 Completing the installation
Open the 3-way ball shut-off valve and (if installed) any shut- off valves in the cold water supply line.

Commissioning

WARNING Electrocution Commissioning must only be carried out by a qualified contractor in accordance with safety regulations.
11.1 Initial start-upSTIEBEL ELTRON DHF 18 C Hydraulically Controlled
Instantaneous Water Heater - Instalattion 6

Open and close all connected draw-off valves several times, until all air has been purged from the pipework and the appliance.
Carry outa tightness check.
Fit the appliance cover. Check that the appliance cover Is seated correctly.
Secure the appliance cover with a screw.
Insert the cap. Turn it clockwise as far as it will go.
Latch the output selector into place. To do this, turn it fully anti- clockwise and clockwise.
Switch on the power supply.
Check the appliance function.
Remove the protective foil from the control fascia.
Appliance handover
Explain the functions of the appliance to the user. Show the user how to operate the appliance.
Make users aware of potential dangers, especially the risk of scalding.
Hand over these instructions.
11.2 Recommissioning
Material losses
To ensure that the tubular heater heating system is not damaged following an interruption to the water supply, the appliance must be recommissioned by taking the fol- lowing steps.
Disconnect the appliance from the power supply by removing the fuses/tripping the MCBs.
Open the tap for one minute until the appliance and its upstream cold water supply line are free of air.
Switch on the power supply again.

Shutting down the system

Isolate all poles of the appliance from the power supply.
Drain the appliance (see chapter “Installation / Maintenance’).

Troubleshooting

Fault Cause Remedy
No hot water. The fuse/MCB in the distribution board has blown/responded.

Check the fuse/MCB in your fuse box/distribu- tion board.
The heating system is faulty.|  Replace the tubular heat- er heating system.
The appliance does not Start| The mains water pres-sure is too low.| Descale/ clean the con-  nected aerator / shower head.
The strainer inthe cold water inlet is blocked.| Clean the strainer in the  _ water inlet.
The differential pressure switch (MRC contro! valve) with flow meter does not activate, even though the DHW valve is fully open.| The starting flow rate re- quired for the appliance  to start heating at the selected output has not been reached (see chap- ter “Specification / Data table”).|   Clean the strainer in the water inlet.
The appliance is not sup- plying hot water; the dif- ferential pressure switch has activated audibly.|  The high limit safety cut-out has switched the appliance off for safety  reasons. The appliance is not heating.| Check the cold water inlet temperature and reduce  it if necessary.
The MRC control valve has a contact fault.| Check the function of the  MRC control valve and replace it if necessary.
Flush the heating system and avoid overheating it while doing so.
The heating system is scaled up.|  Replace the heating  system.

Maintenance

WARNING Electrocution Before any work on the appliance, disconnect all poles from the power supply.
Draining the appliance
You can drain the appliance for maintenance work or to protect it from frost.
WARNING Burns Hot water may escape when draining the appliance.
Close the 3-way ball shut-off valve or the shut-off valve in the cold water supply line.
Open all draw-off valves.
Undo the water connections on the appliance.
Store the dismantled appliance free from the risk of frost, as water residues remaining inside the appliance can freeze and cause damage.
Cleaning the strainer
![STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous Water Heater

A strainer is fitted in the 3-way ball shut-off valve. In case of con- tamination, you can remove this strainer and clean it.
Close the 3-way ball shut-off valve or the shut-off valve in the cold water supply line.
Remove the plastic profile washer and the strainer and clean the components.
Fit the strainer and the plastic profile washer.

Specification

15.1 Dimensions and connections
![STIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous Water Heater

| | | DHF C
---|---|---|---
b02| Entry electrical cables| |
c01|  Cold water inlet| Male thread| G1/2A
c06| DHW outlet|  Male thread| G1/2A

Alternative connection optionsSTIEBEL ELTRON DHF 18 C Hydraulically
Controlled Instantaneous Water Heater - Instalattion 9

| | | DHF C
---|---|---|---
bo2|  Entry electrical  cables Ι| |
bo3|  Entry electrical cables II| |

15.2 Wiring diagram
3/PE ~ 400 VSTIEBEL ELTRON DHF 18 C Hydraulically Controlled Instantaneous
Water Heater - Instalattion 10

  1. Differential pressure switch (MRC control valve)
    Stage | for low flow rate
    Stage II for high flow rate

  2. High limit safety cut-out

  3. Tubular heater heating system & Mains terminal

Priority control with LR 1-ASTIEBEL ELTRON DHF 18 C Hydraulically
Controlled Instantaneous Water Heater - Instalattion 11

  1. Control cable to the contactor of the second appliance (e.g. electric storage heaters).
  2. Control contact drops out when switching the instantaneous water heater on.

15.3 DHW output
The DHW output Is subject to the mains power supply, the appli- ance connected load and the cold water inlet temperature. The rated voltage and rated output can be found on the type plate (see chapter “Installation / Troubleshooting’).

Connected load in kW 38 °C DHW output in 1/min.
Rated voltage Cold water inlet temperature
400 V 5 °C

DHF 13 C
6.6| 2.9| 3.4| 4.1| 5.2
13.2| 5.7| 6.7| 8.2| 10.5
DHF 15 C
7.5| 3.2| 3.8| 4.7| 6.0
15| 6.5| 7.7| 9.3| 11.9
DHF 18 C
9| 3.9| 4.6| 5.6| 7.1
18| 7.8| 9.2| 11.2| 14.3
DHF 21 C
10.5| 4.5| 5.4| 6.5| 8.3
21| 9.1| 10.7| 13.0| 16.7
Connected Load in kW| 50 °C DHW output in l/min.
---|---
Rated voltage| Cold water inlet temperature
400V| 5 °C| 10°C| 15°C| 20 °C
DHF 13 C
6.6| 2.1| 2.4| 2.7| 3.1
13.2| 4.2| 4.7| 5.4| 6.3
DHF 15 C
7.5| 2.4| 2.7| 3.1| 3.6
15| 4.8| 5.4| 6.1| 7.1
DHF 18 C
9| 2.9| 3.2| 3.7| 4.3
18| 5.7| 6.4| 7.3| 8.6
DHF 21 C
10.5| 3.3| 3.8| 4.3| 5.0
21| 6.7| 7.5| 8.6| 10.0

15.4 Pressure drop
Taps

Tap pressure drop at a flow rate of 10 1/min

Mono lever mixer tap, approx.| MPa.| 0.04 – 0.08
Thermostatic valve, approx.| MPa| 0.03 – 0.05
Hand shower, approx.| MPa| 0.03 – 0.15

Sizing the pipework
When calculating the size of the pipework, an appliance pressure drop of 0.1 MPa is recommended.
15.5 Energy consumption data
Product datasheet: Conventional water heaters to regulation (EU) no. 812/2013 and 814/2013 / (S.|. 2019 No. 539 / Schedule 2)

| | DHF 13 C| DHF 15 C| DHF 18 C| DHF 21 C
---|---|---|---|---|---
| | 074301| 074302| 074303| 074304
Manufacturer| | STIEBEL ELTRON| STIEBEL ELTRON| STIEBEL ELTRON| STIEBEL ELTRON
Load profile| | XS| S| S| S
Energy efficiency class| | B| B| B| B
Energy conversion efficiency| %| 38| 36| 36| 36
Annual power consumption| kWh| 489| 525| 525| 517
Sound power level| dB(A)| 15| 15| 15| 15
Special information on measuring efficiency| | None| None| None| None
Daily power consumption| kWh| 2,265| 2,478| 2,478| 2,428

15.6 Data table

| | DHF 13 C| DHF 15 Ca| DHF 18 C| DHF 21 C
---|---|---|---|---|---
| | 74301| 74302| 74303| 74304
Electrical data
Rated voltage| V| 400| 400| 400| 400
Rated output stage I max.| kW| 6.6| 7.5| 9| 10.5
Rated output stage II min.| kW| 6.6| 7.5| 9| 10.5
Rated output stage II max.| kW| 13.2| 15| 18| 20.5
Rated current| A| 19.5| 21.7| 26| 29.6
Fuse protection| A| 20| 25| 32| 32
Phases| | 3/PE| 3/PE| 3/PE| 3/PE
Frequency| Hz| 50/60| 50/60| 50/60| 50/60
Connections
Water connection| | G 1/2 A| G 1/2 A| G 1/2 A| G 1/2 A
Application limits
Max. permissible pressure| MPa| 1| 1| 1| 1
Total hardness| mmol/I| 2.5| 2.5| 2.5| 2.5
Carbonate hardness| °dH| 14| 14| 14| 14
Hardness range| | 2 (moderately hard)| 2 (moderatel hard)| 2 (moderately hard)| 2 (moderately hard)
Values
°Max. permissible inlet temperature| °C| 20| 20| 20| 20
ON 1st stage| l/min| >2.5| >3.0| >3.9| >4.4
ON 2nd stage| l/min| >3.7| >4.5| >5.9| >6.4
Pressure drop at flow rate| MPa| 0.05| 0.055| 0.06| 0.06
Flow rate for pressure drop| l/min| 3.7| 4.5| 5.9| 6.4
DHW delivery| l/min| 6.7| 7.4| 9.2| 10.7
A0 on delivery| K| 28| 28| 28| 28
Hydraulic data
Nominal capacity| I| 0.6| 0.6| 0.6| 0.6
---|---|---|---|---|---
Versions
Protection class| | 1| 1| 1| 1
Pressure vessel material| | Copper| Copper| Copper| Copper
Heating system, heat generator| | Tubular heater| Tubular heater| Tubular heater| Tubular heater
Cover and back panel| | Plastic| Plastic| Plastic| Plastic
Colour| | white| white| white| white
IP rating| | IP 24| IP 24| IP 24| IP 24
Energy data
Energy efficiency class| | B| B| B| B
Dimensions
Height| mm| 370| 370| 370| 370
Width| mm| 220| 220| 220| 220
Depth| mm| 130| 130| 130| 130
Weights
Weight| | 4.10| 4.10| 4.10| 4.10

Guarantee

The guarantee conditions of our German companies do not apply to appliances acquired outside of Germany. In countries where our subsidiaries sell our products a guarantee can only be issued by those subsidiaries. Such guarantee is only grant- ed if the subsidiary has issued its own terms of guarantee. No other guarantee will be granted.
We shall not provide any guarantee for appliances acquired in countries where we have no subsidiary to sell our products. This will not affect warranties issued by any importers.

Environment and recycling

We would ask you to help protect the environment. After use, dispose of the various materials in accordance with national regulations.

Deutschland
STIEBEL ELTRON GmbH & Co. KG
Dr.-Stiebel-Stra&e 33 | 37603 Holzminden
Tel. 05531 702-0 | Fax 05531 702-480
info@stiebel-eltron.de
www.stiebel-eltron.de
United States of America
STIEBEL ELTRON, Inc.
17 West Street | 01088 West Hatfield MA
Tel. 0413 247-3380 | Fax 0413 247-3369
info@stiebel-eltron-usa.com
www.stiebel-eltron-usa.com

Subject to errors and technical changes!
A 169640-43587-9727

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