3
2014
SMOKE EXTRACTOR SAFEK
INSTRUCTIONS FOR INSTALLATION, USE AND MAINTENANCE
Checking list in case of malfunction
Switch off the smoke extractor before checking, detach the cover plate (4 screws) and lift the upper part of
the casing off! The extractor can be turned aside on a hold-open hook, if it is necessary to check the pipe or
the impeller.
1. The smoke extractor vibrates: Check
- that there are no ice or impurities in the impeller causing unbalance.
- that there is no obstacle in the duct or on the unit that restricts the air current.
- that the dampers of the pipe are operating properly.
- that the fastening screw of the impeller is in place and tightened.
- that the blades of the impeller are undamaged.
- that there are no loose balancing pieces.
2. The smoke extractor operates but the rates do not correspond those given in the data sheet: Check
- that the impeller rotates in the right direction (arrow in the motor clip plate).
(The rotation direction can be changed by transforming the coupling, for further information please contact
Koja Ltd.)
- that the valves are open.
- that all air terminal devices have been installed.
- that the dampers are open.
- that the pressure loss of the ductwork is not bigger than estimated.
- that the extractor operates by all phases.
- that the frequency converter operates.
- that the voltage of the frequency converter corresponds that of the motor (400V)
- that there is no fault in the frequency converter by ignoring the converter with another coupling.
3. The extractor do not start: Check
- that the fuses and thermal relays are undamaged and right dimensioned.
- that the coupling is right (see the instructions in the side of unit).
- that there is a voltage in the extractor.
- that the impeller rotates freely. (Ice or some mechanical object may restrain the rotation.)
- that the adjuster is actuating.
4. There is a strange noise in the extractor: Check
- that the impeller rotates freely. (Ice or some mechanical object may restrain the rotation.)
If the roof extractor does not operate properly in spite of these acts, write down
the unit code:
e.g. T41400348WL
the order number:
e.g. 901371 / 1001 / 10
shown in the type plate and contact Koja:
Tel:
+358 50 5417 500
E-mail:
NB. We check all smoke extractors returned. If the return is unfounded we shall charge the price of the
substitute product we sent.
