Alfa Laval Mini ECO
Installation, service and operating instruction
7
2 Operating instructions
General operation2.1
The temperature and pressure of the incoming heating network water are very high. The heat from the heating
network water is transferred to the heating and hot water systems of the building in the heat exchangers. The
heat is transferred through thin plates of acid-resistant stainless steel which keep the heating network water
completely separate from the systems in the building.
Mini ECO has automatic temperature control for hot water. This measures the temperature of the hot water in
the heat exchanger and automatically controls the primary flow.
The hot water temperature is controlled by a temperature control system which is set to about 50 ºC.
If the temperature is set too high, there is a risk of scalding. Setting the hot water temperature too low may
result in unwanted bacteriological growth in the hot water system.
The heating circuit is controlled in relation to outdoor temperature and/or desired room temperature by means
of a controller and temperature sensor.
When no heating flow is required, the heating circulation pump stops automatically, but is run occasionally to
prevent seizing up due to standing still for a long time.
After adjustment, the Mini ECO operates completely automatically. However, in hard water areas it is advisable
to be attentive and to remedy any faults in good time if the temperature of the hot water is too high; otherwise
the risk of lime deposits in the heat exchanger may increase.
The energy supplier registers the use of energy. Measurement is done by recording the flow of heating network
medium through the system, and by measuring the temperature difference between the medium’s supply and
return flow.
Safety equipment/inspection2.2
•Daily inspection to check for leaks from pipes or components.
•Weekly inspection to make sure that the operation of the heating and hot water control systems is
stable and that the temperature does not fluctuate. Temperature hunting causes unnecessary wear of
valves, thermostats and heat exchangers.
•Every three months check the safety valves and the pressure in the heating system.
To check the operation of a safety valve, turn its wheel/knob until water escapes from the waste pipe of the
valve, then close the wheel/knob quickly. Occasionally a safety valve may open automatically to release excess
pressure. After a safety valve has been open it is important that it closes properly and does not drip.
