LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01
- 15 -
4. Safety devices and warning notes
4.1 Safety devices
All cooling circuits are equipped with an overpressure monitor which switches off the compressor if the
condensation pressure is excessive. In addition all compressors are fitted with a combined
overtemperature/overcurrent cut-out which interrupts the compressor current and switches on again after
cooling down.
All pumps are fitted with winding temperature monitors or overcurrent circuit breaker.
One or more fuses or automatic circuit breakers (depending on the type of unit) are provided to protect the
electrical equipment.
4.2 Warning notes
It is essential that you observe the following instructions:
Connect the equipment only to a socket with protective earth connection (PE)!
Check the data on the rating label against the actual supply voltage and frequency!
Any work on the unit must only be carried out by a qualified electrician and with the supply plug
disconnected (except for cleaning the condenser behind the front grille)!
During starting-up it is essential to follow the sequence according to Section 6, 7 and 8!
Class A according to EMC standard EN 61326-1: Operation only at industrial areas.
Class B according to EMC standard EN 61326-1: Operation suitable for domestic areas.
Class B* according to EMC standard EN 61326-1: Thermostat fulfills class B, when a line >100 A is
available. With unfavorable net circumstances distrubing variations in line voltage can occur.
Values for temperature variation and indicating accuracy apply under normal conditions according to
DIN 58966. High-frequency electromagnetic fields may under special conditions lead to unfavourable
values. This does not affect safety.
WARNING: The equipment must only be used as intended and described in these Operating
Instructions.
This includes operation by suitably instructed and qualified personnel.
The units are not designed for use under medical conditions according to
EN 60601-1 or IEC 601-1!
At regular intervals check the condenser for any dirt deposit and also the level in the bath (see Sections 7
and 9.1)!
ATTENTION: In case of narrowed or closed circuit pressures which can destroy connected equipment
(Glass!!) can occur.
Protect the tubes with hose clips against slipping off!
Devices with side channel pump (all except for WK 230, WK 500, WK 600, WK 700, WK 1400, WK 2400)
must never be operated with bath level under minimal level since otherwise the pump bearings are
damaged.
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