Alfa Laval AquaMicro, Installation And Service Instruction

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Alfa Laval Micro
Installation and service instruction
56
Change the heating actuator 15.3
1. Disconnect the electrical power supply.
2. Unscrew the heating actuator from the valve.
3. Disconnect the cable from heating actuator in the
connection box.
4. The cable to the heating actuator is held by straps, cut
them off. Replace the old actuator and cable with a new.
Attach the cable with new straps.
Picture 51
Change the heating valve 15.4
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
1. Unscrew the heating actuator from the control valve.
2. Use a spanner to remove the control valve.
Note the arrow
direction on the valve.
3. Mount a new valve; and take especially care to the arrow
direction.
4. Fasten the actuator.
Picture 52
Change the pump 15.5
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.
Picture 53