10. Maintenance
Installer reference guide / Mono tank integrated type
180
10.1 Overview
The unit shall be checked and inspected regularly for correct operation and overall status.
NOTE
• Always switch off the unit and turn off the main power supply to the unit and switch off the power via
disconnect switch before carrying out any maintenance or repair works.
• Mentioned actions shall be carried out at least once a year by qualified personnel.
10.2 The components of maintenance
Yearly maintenance of the outdoor unit
Heat exchanger of the outdoor unit
• The heat exchanger of the outdoor unit can get blocked up due to dust, dirt, leaves, etc. It is recommended to clean
the heat exchanger annually or any sooner if dirt becomes visible. A blocked heat exchanger can cause performance
issues and poor energy efficiency.
Water filter
• Use a water filter which is available for cleaning and clean it regularly.
Yearly maintenance of the indoor unit
Water pressure
• Check if the water pressure is according to the pressure as stated in the commissioning sheet (calculation depending
on installation volume and height) If necessary, fill with more water. Also check the expansion vessel's pressure
(by Nitrogen). As a broken expansion vessel can cause a low system pressure when the system is cold.
Water pressure relief valve
• Check for correct operation of the pressure relief valve.
– The valve will work over the designated pressure.
– If there is leakage of water or water splashed in normal condition, please contact your local installer.
Pressure relief valve of the DHW (field supply)
• Open the valve
– Make sure that there is no water blockage inside the valve or between piping. The flow of water from the relief
valve must be sufficient.