Maintenance, Trouble Shooting, Service; Installation Instruction For Flow Switch; Components; Pumps/Motor - ECOLAB Hybrid MU421 Gebrauchsanweisung

9. Maintenance, Trouble shooting,
Service
Service may only be carried out by authorized and
qualified personnel.
CAUTION
The system must only be serviced when
there is no voltage or pressure on the sys-
tem
.1. Turn off the main switch at the control box
2. Open a water outlet to depressurise the system
.

9.1. Installation Instruction for Flow Switch

There is a dot on one of the nut surfaces on the
sensor. This is used to position the contact point of
the sensor in relation to the direction of flow of the
medium.
This marking must be located within an angle of +/-
30° perpendicular to the direction of flow, as shown in
the example.
Mark
Flow
Diagram of sensor fitted in a pipe.
20
30°
Loctite 577 is used at the factory to seal the thread,
but packing yarn/packing tape can also be used.

9.2. Components

9.2.1.

Pumps/motor

Pumps/motor are maintenance free.
9.2.2.

Control system

Maintenance free
If defective: Call a service technician
9.2.3.

Flow switch

Maintenance-free.
If defective, replace the flow switch.
110000973
110002490
30°
110002491