Alfa Laval Micro
Installation, service and operating instruction
62
Change the pump
20.5
Maintenance and repairs must be carried out by an authorized service technician.
Before starting out repairs always close the primary supply and return shutoff valves and drain
the system with the draining valves.
After finishing repair; open the shutoff valves. Start with primary supply and then the return lines,
in order to avoid pollutions in the system. Open up the valves slowly to avoid pressure surges.
Either change the complete pump or just change the pump motor.
1. Disconnect the electrical plug.
2. When changing the complete pump, release the brass nuts with a
spanner and replace the pump.
3. If only changing the motor, release it by unscrewing four sockets head
cap screws and replace the motor.
4. Connect the power plug and open the shutoff valves.
5. Check all the connections for leaks.
Change the heating circuit supply temperature sensor 20.6
Maintenance and repairs must be carried out by an authorized service technician.
1. Disconnect the electrical power supply.
2. Disconnect the quick-connect terminals and replace the
sensor with a new one.
Change the outdoor temperature sensor 20.7
Maintenance and repairs must be carried out by an authorized service technician.
1. Disconnect the electrical power supply.
2. Unscrew the lid of the outdoor temperature sensor by turning it anti-
clockwise.
3. Unscrew the cables.
4. Loosen the cable fitting.
5. Install a new outdoor temperature sensor.
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