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Connection to mains
1. The duct heater is designed to operate on single phase, two phase or three phase alternating current and comes in a variety
of versions with, or without, built-in control equipment.
2. The duct heater must be connected to the mains supply with a fixed installed round cable. Appropriate cable glands must
be used to retain the electrical protection class.
3. Duct heater versions CBMF, has a built-in electronic interlocking airflow sensor that ensures that the heating elements
will not actuate, unless there is an appropriate airflow through the duct heater. The electronic interlocking device is set for
an airflow limit of approximately 1.5 m/s. The inlet air must be filtered to reduce the risk of contamination of the airflow
sensor
.
4
. Duct heater versions CB and CBM,
to the heater unless the associated fan has been started in advance or started at the same time. Furthermore, it must not
be possible to switch off the associated fan unless the power supply to the heater has been turned off in advance or turned
off at the same time. The air speed through the heater must be at least 1.5 m/s.
5. A multi pole switch must be included in the fixed installation.
6. The installation must be carried out by an authorized electrician.
7. The heater is S-marked, CE-marked, EMC-marked and designed in accordance with the following standards:
SEMKO 111 FA 1982 /
8. The duct heater is equipped with two overheating cut-outs (of which one is manual reset), to prevent overheating when
the airflow is too low or in case of a fault in the system.
9. A drawing must be attached inside the fuse box or on the wall of the service room. The drawing shows the rating of the
duct heater and its location in the building, together with information about the measures to be taken if the overheating
cut-outs is activated.
10. Since the sensor circuitry, for heaters type CBM and CBMF, is not galvanic separated from the power supply, care must be
taken when the sensor are connected due to the mains voltage level.
11.
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the
appliance.
Fitting
1. The heater is designed for insertion into standard spiral ducting and is fixed to the ducting with screws.
2. The air must flow through the heater in the direction indicated by the arrow on the side of the connection box.
3. The heater can be fitted in either horizontal or vertical ducting. The heater may only be fitted in ducts that are made of
incombustible and heat-and-cold resistant material. The connection box can be freely placed facing upwards or sideways
to a maximum angle of 90°. Fitting with the connection box facing downwards is
4. The access opening to a room must be equipped with a fixed mesh or an intake air device
which makes it impossible to touch the heating elements.
5. A warning sign must be attached close to the air outlet, stating that the air outlet must not be covered.
6. The distance from (to) the heater to (from) a duct bend, valve, filter, etc., should correspond to, at least, twice the duct
diameter. Otherwise there is a risk that the airflow through the heater will be uneven which can cause activation of the
overheating cut-out.
measure the airflow.
Example: CB 100 result in a distance of at least 200mm, CB 160 result in a distance of at least 320mm, etc.
7. The duct heater may be insulated in accordance with valid regulations for ventilation ducting. However, the
insulation must be incombustible. The insulation must not cover the lid, since the rating plate must be visible
and the lid must be removable. Furthermore, the insulation must not cover any heatsinks, nor the side of the
connection box where the SCR's (Triac's) are mounted.
8. The duct heater must be accessable for replacement and inspection.
9. The distance from the heater metal casing to any wood or other combustible material must
30mm.
10.
The maximum ambient temperature allowed is 30°C
11.
The maximum output air temperature allowed is 50°C
Maintenance
No maintenance is required, except for a periodic functional test.
Overheating
If the overheating cut-out with manual reset has been activated, the following should be observed:
1. Only authorized electricians are allowed to remove the lid.
2. The mains supply voltage must be switched off.
3. Investigate carefully the reason for activation of the cut-out.
4. When the fault has been eliminated, the cut-out can be reset.
does not have any built-in interlocking device, so it must not be possible to supply power
EN 60335-1 / EN 60335-2-30
can cause the built-in interlocking device (heater versions CBMF) not being able to
Furthermore, it
/ EN 61000-6-2
/ EN 61000-6-3 / EN 61000-3-11
.
.
.
NOT
allowed.
NOT
be less than
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