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SV01 — Condenser Solenoid Valve
SV02 — Compressor Solenoid Valve
SV03 — Pumpout Solenoid Valve
SV04 — Drain Solenoid Valve
SV05 — Regeneration Solenoid Valve
SV06 — Vent Solenoid Valve
TS01 — Purge Compressor Inlet Temperature
Fig 30 – Purge system wiring
3TR — Transformer
4TR — Transformer
7TB 1,2 — 24VAC Low Voltage Wiring Terminal Block
7TB LL1, LL2 — Main One Phase Power
7TB PE — Ground
CC — Purge Compressor/Fan Contactor
HC — Purge Heater Contactor
HSR — High Level Switch Relay
LSR — Low Level Switch Relay
PR — Purge Vacuum Pump Relay
SIOB — Purge Input/Output Board
Fig 31 – Purge system control box
3.6.3 High pressure safety accessory: SRMCR – Chiller equipped with VFD LF2
3.6.3.1 General description :
The unit is equipped with a safety loop, also called measurement, control and regulation devices playing a role in
safety (SRMCR for protection against overpressure that could be created by the compressor).
Made of :
- 2 active pressure switches (HPS) at compressor discharge
- Safety relay K4 inside the control cabinet
- Power contactor K101 inside the LF2 VFD
- LF2 VFD
See chiller wiring diagram and bill of material (part numbers).
This SRMCR is designed in accordance with EN ISO 13849-1: 2016 according to the following characteristics:
- PL d
- Category 3.
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