Table of Contents
Advertisement
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.emersonclimate.eu. The wiring diagram in Figure 20
below relates to an option using a 7-wire cable.
Figure 20
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".
Mechanical oil pressure switch – Alco Control FD-113ZU (A22 - 057)
4.6.2.2
Specifications for electro-mechanical oil pressure switches are as follows:
Cut-out pressure: 0.63 ± 0.14 bar
Cut-in pressure:
Time delay:
The Alco Control FD-113ZU mechanical oil pressure switch operates with the above set points.
Figure 21
Protection class of the module: IP30.
20
Wiring:
Brown (BN) = Power supply input
Violet (VT) = Running signal from compressor
Grey (GY) = Input changeover contact from daisy
chain
Orange (OG) = Output changeover contact linked
to compressor contactor
Pink (PK) = Output changeover contact linked to
alarm
Blue (BU) = Power supply output
0.9 ± 0.1 bar
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
C6.3.2/0416-0716/E
Advertisement
Table of Contents
