Emerson Copeland 4MI-30X, Application Manuallines

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AGL_Stream_ST_A2L_A1_4M_6M_EN_Rev00 29
The specifications for the OPS2 oil pressure switch from Alco Controls are as follows:
▪
Differential pressure: 0.95 ± 0.15 bar
▪
Time delay: 120 ± 15 sec
Where there is a 5-wire cable connection between the electrical control panel and the compressor
terminal box to the OPS module, the same wires can be applied to the OPS2 which will give the
functions of an OPS1 module.
To obtain use of all of the features of the OPS2 a 7-wire cable between the electrical control cabinet
and the compressor terminal box should be used. Wiring diagrams for OPS2 are shown in Technical
Information D7.8.3 "DWM Copeland
™ Semi-hermetic Compressor Oil Pressure Differential Switch
OPS2" available at www.climate.emerson.com/en-gb . The wiring diagram in Figure 34 below relates
to an option using a 7-wire cable.
Wiring:
Brown (BN) = Power supply input
Violet (VIO) = Running signal from the compressor
Grey (GR) = Input changeover contact from the daisy
chain
Orange (OG) = Output changeover contact linked to the
compressor contactor
Pink (PK) = Output changeover contact linked to the
alarm
Blue (BU) = Power supply output
Figure 34: Wiring diagram OPS2
NOTE: Where a 5- or 7-wire cable is stated a 4- or 6-wire cable is required. In some countries
only a 5- or 7-wire cable is available. See more information about OPS2 in Technical
Information D7.8.3 "DWM Copeland
™ Semi-hermetic Compressor Oil Pressure Differential
Switch OPS2".
Electro-mechanical oil pressure switch
– Alco Controls FD-113ZU
The oil differential pressure switch FD-113ZU from Alco Controls is released for A1 refrigerants only.
Application with A2L refrigerants is not possible.
The specifications for the FD-113ZU electro-mechanical oil pressure switch are as follows:
▪
Cut-out pressure: 0.63 ± 0.14 bar
▪
Cut-in pressure: 0.9 ± 0.1 bar
▪
Time delay: 120 ± 15 sec
Legend:
11 Voltage connection
21 Control voltage connection
22 Control circuit
24 Alarm connection
A2 Oil pressure switch
A5 Compressor terminal box
R Relay
N Neutral connection
t Time delay
Figure 35: Wiring diagram FD-113ZU
Protection class: IP30.