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9 Performing maintenance
Caution
Maintenance may only by carried out by a approved service and maintenance engineer.
At each service, the dual service system must have a complete visual inspection and
mainly consists of detecting leakage. The maintenance should be carried out to the
following components:
•
DHW-pump;
Heating pump;
•
3-way mixing valve;
•
•
Temperature sensor S
Plate heat exchanger;
•
;
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