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4.4.
Safety devices, guards and safeguards
4.4.1.
High-pressure limiter
The high-pressure limiter (PZH) is a pressure switch with manual reset. The PZH limits the condensing
pressure and switches off all compressors via their load contactors when the maximum permitted system
operating pressure is reached. It is part of the safety chain. The PZH is installed on the refrigerant collector
for the chiller types cBoxX 40 – cBoxX 180 (see
Figure
10: Position of the high pressure limiter (PZH)
). If the
PZH has been activated, a message is output at the operating terminal. In this case, please following the
instructions in the Chapter Troubleshooting (see
Appendix Fehler! Verweisquelle konnte nicht gefunden
werden. Fehler! Verweisquelle konnte nicht gefunden werden.
)
Figure 10: Position of the high pressure limiter (PZH)
High pressure limiter (PZH)
cBoxX 40 – cBoxX 100
High pressure limiter (PZH)
cBoxX 120 -cBoxX 180
