KKT cBoxX 30 - Safety Devices, Guards and Safeguards; High-Pressure Limiter

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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 30 – cBoxX 200 and on the fluid
pipe for the chiller types cBoxX 120 – cBoxX 200 (see Figure 8: Position of the high-pressure
limiter (PZH)). If the PZH has triggered, a message appears at the operator control terminal. In
this case, please follow the instructions in the Troubleshooting chapter (see Appendix 0).
High pressure limiter (PZH) High pressure limiter (PZH)
cBoxX 30 – cBoxX 100 cBoxX 100 – cBoxX 200
Figure 8: Position of the high-pressure limiter (PZH)
High-pressure limiter (PZH)