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Installation-, Operating-, Maintenance-Manual, Spare Part List
Functional Characteristics of the EEx-Protection
Point 20.0
Explosion-protected control unit for the refrigerant compressor
Explosion protection acc. EN60079/ff; EEx de (ia) IIC T6
Protection rate acc. EN60529: IP54
Composed of pressure resistant encapsulated housing (Ex d) and shielded enclosure "Advanced
Security" (Ex e). The shielded enclosure "Advanced Security" contains rail-mounted terminals to
apply the electrical connection cables. Between pressure resistant encapsulated housing (Ex d)
and shielded enclosure "Advanced Security" (Ex e) special line bushing for EEx-area are installed.
The pressure resistant encapsulated housing (Ex d) contains:
EEx - i – Switch amplifier, relay output (A1)
Protection switch (F1)
Switch relay (K1)
Startup relay (K2)
Startup capacitor (C1)
Point 20.1
High-pressure and low-pressure limiter
The high-pressure limiter monitors the pressure of the refrigerant. If the pressure rises over the
permitted maximum pressure, it switches off the refrigerant compressor – defined acting point
20bar. After problem solving it needs a manual reset.
The high-pressure limiter monitors the pressure of the refrigerant. If the pressure falls below the
permitted minimum pressure, it switches off the refrigerant compressor – defined acting point
1bar. After problem solving it needs a manual reset.
Point 20.2
Safety temperature limiter 01
The safety temperature limiter is mounted on the pressure line at the outlet of the refrigerant
compressor. It monitors the operating temperature of the refrigerant compressor. If the
temperature rises over the permitted maximum temperature, it switches off the refrigerant
compressor – defined acting point 85°C. After problem solving it needs a manual reset.
Point 20.3
Safety temperature limiter 02
The safety temperature limiter is mounted on the housing of the refrigerant compressor. It
monitors the operating temperature of the refrigerant compressor. If the temperature rises over
the permitted maximum temperature, it switches off the refrigerant compressor – defined acting
point 85°C. After problem solving it needs a manual reset.
AGT-PSG GmbH & Co.KG
Errors and printing mistakes excepted
Translation - Manual BCR05 Rev. 06/2017
BCR05
Page 33
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