Stiebel Eltron CNS 50 S 15.09.2008 - 25.01.2009: 2 Installation instructions

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 2  Installation instructions 

for the professional

This unit may only be erected and electrically 

connected by a specialist following the instal-

lation instructions.

First remove the packaging and check accesso-

ries and any enclosures, ensure that no acces-

sories remain in the packaging material.

2.1  Structure of unit

4

  Air outlet grid

5

 Wall 

bracket

6

 Closing 

bolt

7

  Mains connection cable

8

 Rating 

plate

2.2 Provisions  and  specification

The unit should not be  

operated 

–  in rooms at risk of explosion or fire from 

chemicals, dust, gas or vapour,

–  in the immediate vicinity of pipes or 

containers which transport or contain 

flammable or explosive substances,

–  if the minimum distances from adjacent 

object surfaces are not observed.

In workshops or other rooms in which ex-

haust gases, oil or petrol vapours etc. occur 

or where solvents and chemicals are used, 

persistent odour problems and where appli-

cable contamination can occur.

  The unit may not be used as a freestan-

ding unit.

  Do not stand on the unit.

  No changes may be made to the unit.

  The unit should never be left in operation 

accidentally.

  Special care is required if the unit is used 

in the presence of children, the infirm or 

animals. Risk of injury!

  If part of the unit is damaged, if the unit 

has fallen off or is malfunctioning, do not 

operate.

  In case the power mains supply is dama-

ged, it must be replaced by the manuf-

acturer, the customer service of the ma-

nufacturer or an authorized and qualified 

person. Mandatory for hazard prevention.

1.4  Care and maintenance

If the unit housing shows a slight brown dis-

colouration it should be cleaned as soon as 

  The unit may only be fitted to a verti-

cal wall, temperature-resistant up to at 

least 80 °C.

  Minimum distances from adjacent object 

surfaces must be observed.

  All electrical connection and installation 

work must be performed to VDE regula-

tions (0100), the regulations of a compe-

tent utility company and the correspond-

ing national and regional regulations.

  The unit must not be mounted directly 

below a wall socket.

  If the unit is permanently connected to 

an AC network (junction box) an isolation 

distance of at least 3mm is required on all 

poles for isolation from the network. For 

this, circuit breakers, LS switches, fuses 

etc. can be used.  

Installation with permanent connection 

cables is not permitted.

  The rating plate must be observed. The 

rated voltage must correspond to the 

nominal voltage. 

  On installation of the heater in rooms with 

a bath and/or shower, the protection area 

to VDE 0100 part 701 as specified on the 

unit rating plate must be observed.

  The unit must be mounted such that the 

switch and control units are out of reach of 

a person in the bath or shower.

  The mains connection cable may only be 

replaced with original Stiebel Eltron spare 

parts by experts.

2.3 Installation

2.3.1  Installation of wall bracket 

B

The wall bracket should be used as a template 

for fixing the appliance to the wall. It also 

helps to keep the necessary ground clearance. 

To attach the unit proceed as follows:

I

 Place the wall bracket (

5

) holding the 

centre point horizontally on the ground and 

mark the holes 

a

 and 

d

 on the assembly 

wall;

II

 Raise the wall bracket so that the 

holes 

b

 in the wall bracket coincide with 

the marks just made on the assembly wall;

 Mark 

holes 

c

 and 

d

 on the wall bracket on 

the assembly wall;

  At all four markings drill holes and attach 

the wall bracket to the wall using suitable 

fixing materials (wall plugs and screws) 

dependig on the type of wall. The vertical 

slots allow adjustment for an offset in the 

fixing holes.

2.3.2 Unit 

installation C

The convector is mounted by attaching the 

slots on the rear simultaneously to the four 

tabs of the wall bracket pressing down to 

lock. The closing bolt (

6

) of the wall bracket is 

then turned clockwise to the stop, locking the 

fixing. To remove the convector, unscrew the 

locking bolt and lift the unit slightly, pulling it 

forwards and out of the bracket.

Check that . . .

. . . 

the ON/OFF switch is turned on.

. . . 

in your fuse box, the corresponding fuse is intact or whether the breaker has tripped.

Eliminate cause!

If the heater still does not warm up, call customer service!

Check whether it is covered, so it could have overheated (e.g. covered air outlet or inlet opening).

Eliminate cause!

If it does not warm up again after a few minutes‘ cooling down period, call customer service!

Read the type (Typ) and number (Nr.) from the rating plate (

8

) on 

the unit and tell customer service!

•

the unit does not get hot?

•

the unit switches itself 

off?

•

customer service is 

called?

What to do if . . . ?

Typ: CNS . . .  . 

Nr.: . . . . . . – . . . . – . . . . . . 

possible with a damp warm cloth: 

When the appliance is cold it can be cleaned 

with normal cleaning agents.  

Avoid scouring or aggressive cleaning agents. 

Moisture must not penetrate the unit.  

Do not spray cleaning spray into the air slots. 

or regular maintenance we recommend che-

cking the control and adjustment elements. 

At the latest 10 years after first use, the safety, 

control and adjustment elements should be 

checked by an expert.