9. Commissioning & Recommissioning
Installer reference guide / Mono tank integrated type
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Checking-piping / Air purging
• It is recommended to install an inlet combination valve to feed small quantities of water to the system automatically,
replacing the minor water losses and maintaining the system pressure.
• Drain taps must be provided at all low points of the system to permit complete drainage of the circuit for maintenance use.
• Make sure that the check valves are correctly installed in the system (field supply).
• Flush pipes out with clean water to remove contaminants in pipes during installation.
• The strainer(water filter) must be cleaned after flushing the pipes, and it should be cleaned periodically.
Replace strainer when necessary.
• Charge the water until a pressure of 1.5~2.0bar by using make-up water assembly (Field supply).
(The water pressure indicated on the manometer will vary depending on the water temperature)
The nominal water pressure in the system should remain about 1.0 bar at all times to avoid air entering the water system.
• Make sure that air should be vented from the system at start-up or after installing/ servicing.
The air vent valve must be opened during charging the water circuit (at least 2 turns) in order to remove all air in the circuit,
and a inlet combination valve allows water into the system continuously.
• The mandatory service valves
– When using freeze protection valves also the valves and the required air vent and NC 2WAY VALVES.
Air purging
Regarding air purging :
• Make sure the pump is operating via the Self-Test Mode of the Service Menu. You can set the circuit (the position of
the 3WAY VALVE) to space or tank via the Self-Test Menu. Air purge must be performed for both space heating and
tank (DHW) circuits.
