27
1ZSE 5492-128 en, Rev. 4
fm_00117
3 Repairs and adjustments
3.6.3 Spare parts required
■ Pressure relay
■ O-ring (17.1 x 1.6 mm)
3.6.4 Procedure
Replacement of pressure relay:
1. Set the three-way valve handle to the test position (see Fig. 13 and the information plate
on the pressure relay for information).
2. Disconnect the cable.
WARNING
Disconnect all power sources before any work is carried out. Check that the power is
disconnected by using a Voltmeter.
3. Loosen the hexagon-headed connection nut on the quick coupling and remove the
pressure relay.
4. Install a new O-ring (17.1x1.6 mm).
5. Lubricate the threads of the connection nut with grease.
6. Mount the new pressure relay. Tightening torque 25 Nm.
7. Carry out the testing procedure according to section 2.2 Pressure Relay.
8. Connect the cable. Tighten with care, max 5 Nm torque. The seal between the cable
gland and the pressure relay housing includes an O-ring. If the cable gland has to be
changed to another type, the seal against the housing must be secured by a gasket or
by gluing.
9. Set the three-way valve handle back to the service position.
Connection nut
Three-way
valve handle
Quick coupling
Test tap (R 1/8”)
Fig. 13. Pressure relay
Information
plate
Pressure relay
To Next Page
Loading...
Need help?
General
