Protection devices

Pressure limiters (HP + LP)

are required for securing the compressor's application range in order to avoid unacceptable operating conditions. Do not connect the pressure limiters to the service connection of the shut-off valve!

The open reciprocating compressors 4UFC(Y) .. 6NFC(Y) are primarily designed for use in vehicles and for systems with small volume and refrigerant capacity that are commonly used in these applications. In special applications with a widely branched system and a large refrigerant charge, a differential oil pressure switch should be installed and an oil heater should be used.

The open reciprocating compressors 4UFC(Y) .. 6NFC(Y) are primarily designed for use in vehicles and for systems with small volume and refrigerant capacity that are commonly used in these applications. In special applications with a widely branched system and a large refrigerant charge, a differential oil pressure switch should be installed and an oil heater should be used.

Differential oil pressure switch (option)

For the electrical connection and information on function testing, see KT-170.

Oil heater (option)

ensures the lubricity of the oil even after long shut-off periods. It prevents higher refrigerant concentration in the oil and thus reduction of viscosity. The oil heater should be switched on when the compressor is at standstill in case of

Discharge gas temperature sensor

For 4UFR(Y) .. 4NFR(Y), the installation of a discharge gas temperature sensor is recommended to ensure the maximum permissible operating temperature.