STIEBEL ELTRON CNS 50 S 11.05.2009 - 28.02.2010 - Manual (Page 8)

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C26_07_31_0037
1 Operation instructions
for the user and the professional
Use of electrical equipment in principle re-
quires care to exclude any potential risks
from fire, electrical shock or injury. Therefore
the unit should only be used as described in
these instructions, where any use outside the
manufacturer‘s recommendations can lead to
damage or injury.
The correct match between the heat require-
ment of the room and the heating power of
the unit must be observed.
Before use of the unit, read the entire instruc-
tions and follow the information given on pro-
per handling of the unit.
!
These instructions should be kept
carefully and handed to any subse-
quent user of the unit. Please show them to
the engineer performing any repair work.
1.1 Description
The CNS is an electric direct heater exclusi-
vely for wall installation. It is suitable e.g. for
heating a bathroom or as transitional or addi-
tional heating for small rooms such as hobby
rooms or guest rooms.
Series CNS-S
After wall mounting and electrical connection
via a plug and socket, the unit is ready for use.
Series CNS-U
After wall mounting and electrical connection
via a fixed connection through a junction box
(note national regulations), the unit is ready
for use.
Function
The air in the convector is heated by a heating
element and emerges by natural convection
at the top through the air outlet grille (
4). The
openings in the underside of the unit provide
it with cool room air
Safety device
The convector has a protective thermostat
(STR) which switches the appliance off on
overheating. After eliminating the cause (e.g.
covered air outlet or inlet opening), after a
cooling down period of a few minutes the unit
resumes operation.
1.2 Operation
The convector is switched on and off via the
switch (
1) on the right-hand side. The desired
room temperature is set via the temperature
selector (
2) anywhere between around +6°C
and +30 °C. As soon as the set room tem-
perature has been reached, it is maintained
constantly by intermittent heating (the heating
power of the unit must correspond at least to
the heat requirements of the room).
If several heaters are fitted in a room, the tem-
perature setting on each unit may vary.
To avoid excessive energy consumption with
the windows open, the unit should be swit-
ched off during ventilation at the switch (
1).
Frost protection
If the unit is used as a frost guard, set the tem-
perature selector (
2) to the far right stop (*). In
this position the thermostat switches the hea-
ting on automatically if the room temperature
falls to around +6°C.
Limiting the thermostat
Using the two pins on the back of the switch
housing (
3), the thermostat can be fixed in a
particular setting.
a
b
b
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3
2
C26_07_31_0038
To fix a desired temperature, push pin a into
the hole opposite.
To limit the temperature adjustment range,
set the minimum and maximum values on the
selector knob and mark these by inserting pin
b into the opposite, slightly offset hole each
time.
1.2.1 External room thermostat
If necessary the unit can be operated with a
commercial external room thermostat. The
temperature selector (
2) must be turned to the
right stop ( MAX). The room thermostat should
be located as far as possible from the unit and
at least 1.5 m high.
1.2.2 Shutting Down
To shut down the unit, move the switch to the
OFF position and remove the mains plug from
the wall socket (do not pull out the plug using
the lead).
1.3 Safety notes
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.
 Installation (electrical installation), first
operation and maintenance of this unit
may only be performed by an accredited
expert according to these instructions.
 The unit must not be operated if in the
same room work is performed such as
floor laying, grinding, sealing, cleaning
with petrol and care (spray, beeswax) and
similar.
 The housing surfaces of the unit and the
emerging air are hot during operation
(over 80 °C).
 If it is intended that children or persons
with restricted physical, sensory, or mental
capacity should operate the appliance,
it must be ensured that this is only done
after appropriate instruction has been
provided by the person responsible for
their safety. Children should be supervised
to ensure that they do not play with the
device.
Risk of burns!
 Keep small children away from the unit.
Do not Cover!
 Do not place objects on the unit, lean
objects against it or store anything bet-
ween the heater and the wall (e.g. drying
washing).
Also do not place in the immediate vicinity
of the unit any flammable, combustible or
heat-insulating objects or substances such
as laundry, blankets, newspapers, contai-
ners of beeswax or petrol, spray cans or
similar. Risk of explosion!
To prevent overheating of the unit, it
must not be covered.
 A For objects of all types e.g. furniture,
curtains, hangings or textiles or other
flammable or non-flammable materials,
the following minimum distances from the
unit must be observed:
To the air outlet grille
⇒ 500 mm
To the sides ⇒ 100 mm
To the top ⇒ 250 mm
To the underside ⇒ 100 mm
To the back wall ⇒ 22 mm
Hot air must be able to escape
Important features in brief
1 On/off switch
2 Temperature selector button
3 Locking pin
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