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1. Operation instructions
1.1 Unit description
The CBS 20 S is an electrically powered direct
heating unit for wall mounting. It is suitable for
full heating, for example in the bathroom, or
as transitional and supplementary heating for
smaller rooms, such as hobby rooms and guest
rooms.
To provide heating, ambient air is drawn in by
the unit fan through openings in the rear panel,
and is then heated by the heating element
and blown out evenly and without creating
draughts, through the air outflow grid (2) at
the bottom of the unit.
1.2 Operation
Using the thermostat knob (1), the desired
temperature can be adjusted between ap-
proximately 5 °C and 35 °C.
The thermostat within the unit then keeps
the ambient air constantly at the set value,
by repeatedly activating the heating for short
periods.
Frost protection
If the unit is used as a frost protection safe-
guard, the thermostat knob should be turned
fully anticlockwise until it reaches the end limit
stop. In this setting, the thermostat automati-
cally switches on the heating when the room
temperature falls to approximately 6 °C.
The electricity supply must be isolated
to take the unit out of operation.
External room thermostat
If required, the unit can be operated with a
generally available external room thermostat.
In these circumstances the thermostat knob
2. Installation instructions
Installation and electrical connection must be
carried out by a qualified installer, under ob-
servance of these installation instructions.
The CBS 20 S is supplied complete with a
connecting cable.
Only remove the packaging of the unit and
accessories at the place of installation, taking
note of the additional package.
When unpacking, take care to ensure that no
accessories remain behind in the packaging
material.
2.1 Unit design
1 Thermostat knob
2 Hot air outlet grille
3 Hanging bracket
4 Securing screw
F1 Safety thermal cut-out
M1 Fan
N1 Thermostat
N2 External thermostat
R1 Heating element
X1 Connecting block
X2 Connecting cable with mains plug
8
for the user and the professional
should be turned clockwise to the end limit
stop. The room thermostat should be fitted
as far away from the unit as possible and at a
height of at least 1.5 m.
1.3 Safety instructions
The appliance must not:
– Be operated in areas which are subject to
the risk of fire or explosion due to che-
micals, dust, gases or vapours;
– Be operated in the immediate vicinity of
pipes or containers which carry or con-
tain combustible or potentially explosive
substances;
– Be operated, at less as the minimum clea-
rance distances advised.
• Installation (electrical installation), as well as
the first start-up and maintenance of this
unit may only be undertaken by a registered
qualified installer in accordance with these
instructions.
• Under no circumstances must the unit be
operated if work such as the laying, sanding,
sealing, cleaning with petrol, and mainte-
nance (spraying, waxing) of floors and the
like is being carried out in the room where
the unit is installed.
• During operation the surface of the heater
and the outcoming air will be hot (more
than 85 °C). Danger of burning !
Keep children away from heater!
• No objects of any kind must be placed on
the unit, leaned against it, or put between
the heating unit and the wall (for example
to dry the washing).
for the professional
2.2 Provisions and regulations
The appliance must not:
– Be operated in areas which are subject to
the risk of fire or explosion due to che-
micals, dust, gases or vapours;
– Be operated in the immediate vicinity of
pipes or containers which carry or con-
tain combustible or potentially explosive
substances;
– Be operated, at less as the minimum clea-
rance distances advised.
In workshops or other areas in which the
odour of waste gases, oil, petrol, etc. might
occur, or in which work is carried out in-
volving solvents and chemicals, there is a
risk of sustained odour burdens being en-
gendered, and possibly of dirt contamination
occurring.
• The unit may only be fitted on a vertical
wall which is temperature resistant to at
least 85 °C.
• The minimum distances from adjacent ob-
jects must be observed.
In addition, no combustible, flammable, or
heat insulating objects or materials such
as washing, blankets, magazines, containers
holding floor wax or petrol, spray cans and
the like, should be placed in the immediate
vicinity of the unit. Danger of fire!
• For objects of all kinds, such as for example
furniture, drapes, curtains and textiles or
other flammable or non-flammable materi-
als, the following minimum distances from
the unit, particularly from the air outlet
grille, must be observed:
from the air outlet grille
from the unit sides
from the top of the unit
from the bottom of the unit
from the rear panel of the unit ⇒ 26 mm
The hot air must be able to exit un-
impeded!
1.4 Care and maintenance
If slight brownish discolouration should appear
on the unit housing, this should be rubbed off
as soon as possible with a damp cloth.
The unit should be cleaned in the cold condi-
tion, using customary cleaning agents.
Abrasive or corrosive cleaning agents should
be avoided.
Do not spray any cleaning sprays into the air
slots.
1.5 Important instruction
Keep these instructions carefully and
pass them on to your successor in the
event of a change in ownership.
In the event of any repair work, hand them
to the qualified installer for his attention.
• All electrical connection and installation
work is to be carried out in accordance
with the I.E.E Regulations, the provisions of
the appropriate electricity supply companies,
and the relevant national and regional pro-
visions.
• The unit must not be fitted directly beneath
an electrical wall socket.
• If the unit is permanently connected to the
a.c. mains network (unit connection box),
it must be possible to isolate it from the
mains network on all poles with an isolating
distance of at least 3 mm. Contactors, cir-
cuit breakers, fuses etc. can be used for this
purpose.
Installation using a permanently laid connec-
tion cable without a means of isolation is
not permissible.
• The unit rating plate is to be noted. The stated
voltage must correspond to the mains voltage
• If the heating unit is installed in rooms with
a bath and/or a shower, the range of pro-
tection according to the I.E.E. Regulations- in
conformity with the information on the unit
rating plate - must be taken into account.
⇒ 500 mm
⇒ 100 mm
⇒ 200 mm
⇒ 100 mm
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