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INTRODUCTION
A feedwater pump supplies the steam generator with water from an inte-
gral water tank with air trap. The water level of the steam generator is
sensed by a device which controls the operation of the pump so that the
level is kept almost constant. Boil-dry protection cuts off the supply of
electric power to the elements when the water level is low.
See also “Steam generator settings and controls” under Advice and
instructions in the TECHNICAL MANUAL.
Control switch
The steam generator and sterilizer are controlled by the same switch. On
sterilizers with med double steam systems there is an extra shutoff but-
ton marked Steam generator.
Pressure regulation in power stages
The system prevents wear of the element contacts by switching the
power in and out in two stages at different pressure levels and with a
time offset between switch-on and switch-off for the first stage.
Spark-reduction connection
As well as shortening the life of electrical contacts, sparking at the con-
tacts may also cause interference with nearby electronic equipment.
The anti-spark protection is based on fast-acting auxiliary relays taking
over the load from the slow-breaking contacts of the pressure switch for
operating pressure, so largely eliminated sparking.
Safety valve, steam generator
The mandatory periodic check of the operation of the steam generator
safety valve can be done simply by means of the keyswitch described
below. See also the Maintenance chapter in the TECHNICAL MAN-
UAL.
Keyswitch “Test pressure limiter”
When the key is in the safety valve check position, steam is produced
continuously and regardless of the setting of the operating pressure
switch.
Water level regulation
Version with conductive measurement
The Getinge conductive level system is designed for water with a con-
ductivity above 2 μS/cm.
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