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COSTAN TECHNICAL DOCUMENTATION
REVISION STATUS
TRUE COPY
PAGE 9 OF 8
PRODUCT:
EPTAGLOO
ORD
DATE
CHANGE ORDER
OF THE SIGNED
DATE OF 1st ISSUE
DOC. no.
QSM0000406A
CHAP.
No.:
050
A
23.Feb.2010
RANGE
EXTENSION
ORIGINAL
13/June/07
CHAPTER:
ELECTRICAL PANEL
TECHNICAL SPECS
ISSUED BY MKT
This is provided only when high pressure is controlled by the electronic regulator. This is
performed by safety pressure switch PSA (Danfoss KP2).
Operation: upon reaching its actuation threshold, pressure switch PSA turns all condenser
fans on. Its setting must be above the electronic processor’s threshold, but below the high
pressure value set for back up pressure switches KHP1/2, as per PED Directive (Danfoss
KP7B/S). PSA differential must be set to a value that may allow condenser cooling.
Back-up regulation, low-pressure especially, is an emergency condition that does not optimize
compressor and pressure management. Therefore regulation by the electronic control must be
restored as soon as possible.
6.12
Alarms: Diagram UTQ39050/sheet 5.
6.12.1 Red alarm warning lamps on the front of the electrical panel.
6.12.2 Remote transmission by clean contacts on the terminal board: Alarm contacts are closed
when on and open when in alarm status.
6.12.3
Only clean contacts and voltage below 50V can be led to the alarm terminal strip
and respective contacts.
For details on alarm signals, cfr. chapter 15 - Warning lamps .
6.13
Liquid level and general liquid injection: Diagram UTQ39060/sheet 6.
6.13.1
The refrigerant liquid level undergoes monitoring; alarm signaling is delayed by
a timer.
6.13.2 Liquid injection for low temperature units. Control of general liquid-injecting valve
through auxiliary contacts in parallel with all the compressors.
7. Compressor circuit: Diagram #UTQ39070/sheet 7.
7.1 Compact system SIEMENS SIRIUS S0/2
7.1.1 Overcurrent switch (Overload cutout) and circuit breaker that can be padlocked when
compressors are under maintenance (Siemens series S0/2)
7.1.2 Electrical panel versions with residual current device
Merlin Gerin RH99M
and
associated
Toroid TA30
operate the overcurrent circuit breaker (overload cutout) by way of a
release coil that ensures AC23 maneuvers and cuts off the electrical circuit.
7.1.3 Contactors: Siemens series S0/2, coordinated with their respective overcurrent device
following the tables supplied by SIEMENS
7.1.4 compressors are protected by overcurrent cutout switches performing the following
functions:
•
protection against short-circuit
•
protection against overcurrent
•
protection against phase loss
•
protection against phase displacement: this trips when current input differs by
30%-50% between phases.
7.1.5 Low oil level protection circuit. by pressure switch or oil electronic detector.
7.1.6 Overheating protection circuit monitored by thermistor probes connected to probe
monitor KRIWAN INT69VS / SE-BE according to DIN 44081 standards.
7.1.7 Maneuvers and life of contactors
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