KOJA 0603, Instruction For Operation And Maintenance

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AIR HANDLING UNIT FUTURE
INSTRUCTIONS FOR OPERATION AND MAINTENANCE
Heat recovery section, rotor FRTR
2017-02-13 V. 2.0 21
6.3. First actions in case of an alarm, when the motor has stopped
• Switch off the main voltage supply upstream of the control unit, wait 10 seconds and switch the volt -
age on again. If the motor starts, the motor guard of the control unit was tripped. Make sure that the
exchanger rotates freely.
• Check the fuse upstream of the control unit.
• Check the fuse of the control unit.
• Check that the rotation guard is in place and in operation.
• When the control board of the HR rotor gives an alarm, check that the limit switch does not touch the
bottom of the unit (in units that use the Lenze angle gearbox motor).
• If the motor still does not work, leave further troubleshooting to an expert.
6.4. Maintenance
The maintenance interval is 6 months. It is advisable to have the unit serviced at the beginning (autumn) and at
the end (spring) of the heating season.
CAUTION
If maintenance work is neglected, the brush seals, belt and other components may become
worn and damaged. If this is the case, the warranty does not cover the spare parts.
CAUTION
Depending on the size, the heat recovery section is equipped either with a limit switch or
rotation guard with a magnet.
Twice a year
• Check and clean the heat transfer surfaces.
• Make sure that the brush seals lightly touch the surface of the heat exchanger. Replace damaged brush
seals.
• Check the sectorised rotor periphery plate bolts and tighten them to 50 Nm using a torque wrench.
• Check the drive belt. The belt stretches over a year, so shorten it. If the belt is worn, replace it. Check
the tightness of the belt after two weeks of use, and shorten the belt according to the tightening in -
structions so that the belt will have allowance for stretch with respect to the limit switch, if necessary.
• Use a spirit level on the face of the heat exchanger to ensure that the rotor is upright, and adjust it, if
necessary.
Once a year
• Check the drive motor and lubricate the transmission with grease or oil. For more detailed instruc -
tions, see the adhesive label attached to the transmission. Do not mix synthetic and mineral oils or
greases.
• Alter the control signal to ensure that the speed control operates properly and that the control signal
is connected correctly.
• In the case of a model equipped with a rotation guard with a magnet, check the correct positioning
of the rotation guard sensor and magnet by placing the heat exchanger magnet at the sensor. There
should be a distance of 5 to 8 mm between them. If the magnet does not give a signal to the sensor,
turn the magnet (the S mark must point to the sensor). If the sensor still does not receive a signal, re -
place the sensor.