72 EN/39B/06.2018 © STULZ SpA – all rights reserved
SAL
11.9. Voltage Monitoring – VCC
The voltage control relay, is an additional device which stops the power supply to prevent faults if
the voltage not in rated tolerance. The relays monitors according to the respective setting an voltage
whether it exceeds or falls below a specified value or is within a certain range (window monitoring)
The relay installed in the electrical box has a display and can be parametrized with three keys.
The display shows the present value and a symbol that indicates whether the relay is set to
monitor whether the voltage exceeds or falls below a specified value or whether it is set to window
monitoring. The setting range for the upper and lower threshold values extends from 17 V to 275 V.
Reset function: Auto- or manual reset selectable.
ATTENTION
Setting of this component is made in factory and must not be altered.
Maintenance:
• Check every 6 months the proper operation of the voltage control device.
11.10. Monitoring of phase sequence and phase loss (for 3-phase scroll
compressors) – PSCR
Protection relay for phase sequence and phase loss installed in the electrical box. In case of
incorrect phase sequence or phase loss, the relay automatically switch off the compressor to protect
them from damage . Automatic reset when failure is no longer present. LED indication for power on
and fault.
Maintenance:
• Check every 6 months the proper operation of the relay for control phase.
11.11. WIB1000 / WIB1485
The WIB1000 / WIB1485 is a single-point Ethernet interface and it’s used for the SNMP
supervision, web monitoring and OnBoard communication. It's also possible to update the firmware
and the parameters list through an USB key, formatted as FAT32. When present, WIB1000 /
WIB1485 is soldered directly on the SPI connector of the mother board. WIB1000 is the option
without the serial interface 485, while WIB1485 is the option with serial interface 485.
11.12. Stainless steel casing - PAKIN
With this option external panel and fixing flanges of the units are made of stainless steel AISI 304
sheet. As standard, with stainless steel casing,units are painted like the units with zinc plated sheet
casing.
11.13. Seaworthy case packaging - SEAPACK
Wooden packaging with special treatment suitable for sea freight. Option available for internal and
external unit.
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