CB MQXL 173046 01 IMO
3
Connection to mains
1. e duct heater is designed to operate on three phase alternating current. See further the wiring diagram
for the particular heater and the electrical data on the ratings plate, placed on the lid of the duct heater.
2. e duct heater must be connected to the mains supply with a xed installed round cable. Appropriate cable glands must be
used to retain the electrical protection class. e standard design is IP43. e IP55 design can be manufactured if required,
in which case this is specied on the rating plate. e IP55 design is delivered with factory mounted cable glands.
3. Duct heaters of type -MQ... has a built in electronic interlocking airow sensor that ensures that the heating elements will not
actuate, unless there is an appropriate airow through the duct heater. e inlet air must be ltered to reduce the risk of
contamination of the airow sensor
4. An all phase switch must be included in the xed installation.
5. e installation must be carried out by an authorized electrician.
6. e heater is S-marked, CE-marked and EMC-marked and designed in accordance with the following standards:
SEMKO 111 FA 1982 / EN 60335-1 / EN 60335-2-30 / EN 61000-6-2 / EN 61000-6-3 / EN 61000-3-11 .
7. e duct heater is equipped with two overheating cut-outs (of which one is manual reset), to prevent overheating
when the airow is too low or in case of a fault in the system.
8. A drawing must be attached inside the fuse box or on the wall of the service room. e 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.
9. is 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. e heater is designed for insertion into standard spiral ducting and is xed to the ducting with screws.
2. e air must ow through the heater in the direction indicated by the arrow on the side of the connection box.
3. e heater can be tted in either horizontal or vertical ducting. e heater may only be tted in ducts that are made of
incombustible and heat-and-cold resistant material. e connection box can be freely placed facing upwards or sideways
to a maximum angle of 90°. Fitting with the connection box facing downwards is NOT allowed.
4. e access opening to a room must be equipped with a xed 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. e distance from (to) the heater to (from) a duct bend, valve, lter, etc., Should correspond to at least twice the duct diameter.
Otherwise there is a risk that the airow through the heater will be uneven which can cause activation of the
overheating cut-out. Example: CV 16 result in a distance of at least 320mm, CV 40 result in a distance of at least 800mm, etc.
7. e duct heater may be insulated in accordance with valid regulations for ventilation ducting. However, the
insulation must be incombustible. e 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. e duct heater must be accessable for replacement and inspection.
9. e distance from the heater metal casing to any wood or other combustible material must be less than 30mm.
10. e maximum ambient temperature allowed is 30°C.
11. e 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. e mains supply voltage must be switched o.
3. Investigate carefully the reason for activation of the cut-out.
4. When the fault has been eliminated, the cut-out can be reset.
GB