Safety Vibration Switch - Primus MB 90 Installation And Maintenance Manual

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BEFORE REMOVING TOP OR BACK PANEL OF THE MACHINE, SWITCH POWER OFF AND WAIT
!
FOR AT LEAST 10 MINUTES. BEFORE STARTING INSPECTION OF FREQUENCY INVERTER,
CHECK FOR RESIDUAL VOLTAGE ACROSS MAIN CIRCUIT TERMINALS + AND -. THIS VOLTAGE
MUST BE BELOW 30VDC BEFORE YOU CAN ACCESS THE INVERTER FOR INSPECTION.
3. Clean and remove dirt and dust from:
– the cooling fin of the inverter
– the motor cooling fins
– the internal ventilator of the inverter (if present)
– the external ventilator (if present)
– the external air relieves of the machine
– check if ventilator in coolfins of inverter (if present) is functional
– check if external ventilator (if present) is functional

5.6. SAFETY VIBRATION SWITCH

FUNCTION DESCRIPTION
Vibration switch is important safety element which must – in case of correct setting – stop the machine
at excessive vibration and oscillation caused by unbalancing, it means by small amount of linen load or improper
distribution of linen in the washing drum and in case of damage of air sacks for the machine spring mounting.
With respect to this component importance we recommend to verify a correct function of vibration switch or
possibly execute the setting – qualified worker should do that at first during the machine installation and
then once a year.
There are two vibration switches used on the machine, they are placed on the left and right frontal panel of
the machine outer tub.
Response of the machine and control system while switching over the vibration switch is described in manual
„Programming Manual".
The machine setting is executed by the manufacturer to maximal unbalancing 7 kg / 15,4 lb, applicable for
90 kg / 198 lb, 140 kg / 308 lb, 11 kg / 24,3 lb, applicable for 180 kg / 396 lb.
These 7 kg / 15,4 lb, 11 kg / 24,3 lb does not mean in any case, that you can load the machine with dry linen
having such unbalance. It means that wet linen can be distributed badly in the drum during spinning and this
can cause unbalancing max. 7 kg / 15,4 lb, 11 kg / 24,3 lb.
If unbalancing is higher than mentioned the machine turns off.
WARNING !
!
THIS SETTING MUST NOT BE CHANGED IN ANY CASE, OTHERWISE THE MACHINE IS DAMAGED
DEFINITELY.
VERIFICATION OF THE FUNCTION
Perform the verification as follows:
1. Remove side frontal panels.
2. Put the machine in operation (washing or spinning).
3. During the machine operation, carefully switch over the vibration switch by moving the flexible control
element manually.
WARNING !
!
DO THIS CAREFULLY TO AVOID INJURIES BY VIBRATING AND FIXED PARTS OF THE MACHINE !
AFTER YOU HAVE CHECKED THE FUNCTION, MOUNT ALL COVERS BACK TO ORIGINAL PLACE !
SENSIBILITY ADJUSTMENT
1. Vibration switch is set to max. unbalancing 7 kg / 15,4 lb, 11 kg / 24,3 lb at the manufacturing plant.
2. If the switch is re-set after all, it is necessary to proceed as follows:
– fix the wooden beam of dimension 10x10 cm, appropriate length and weight 7 kg / 15,4 lb, 11 kg / 24,3 lb
in the empty inner drum, on the outer case circuit
– close an inner drum and outer tub and set the machine for inter-spinning (400 turns/min)
– set the distance between flexible control element of vibration switch and limiter (supporting sheet) on the
limit, it means so that the machine would turn off, or possibly it would be still „in operation"
– To increase unbalancing up to (7,5 kg / 16,5 lb, applicable for 90 kg / 198 lb, 140 kg / 308 lb, 12 kg / 26,5 lb,
applicable for 180 kg / 396 lb) and to change slightly the distance between flexible control element of vibration
switch and the limiter in such a way, so that the machine „turns off" at the moment.
3. Tight the nuts and contra-nuts on the switch and limiter properly.
20 INSTALLATION AND MAINTENANCE MANUAL PUBLICATION DATE 07/04 513289