HS./OS.53 to 74

Example circuit: Single compressor HS.53 to 74 or OS.53 to 74 (except with R717) with water cooled condenser and oil cooler. Simplified representation.

Legend for refrigerant circuit HS./OS.53 to 85 (except with R717)
Legend
1	Compressor
2	Oil solenoid valve
3	Oil flow switch
4	Oil filter
5	Standstill bypass (if required)
6	Oil separator with heating and oil level switch
7	Differential pressure valve (if required)
8	Water cooled oil cooler (if required)
9	Condenser
10	Air cooled oil cooler
11	Oil pump (if required)
12	Mixing valve (if required)
	Suction gas filter
	Sight glass
	Control valve
	Solenoid valve
	Check valve
	Shut-off valve
PRV	Pressure regulating valve
LZ	Level monitor
FZ	Flow limiter
PC	Pressure-controlled
TC	Temperature-controlled

Legend contains connection positions that do not appear in every diagram.