Air Purge Function - Daikin Altherma 3 R ECH2O Installer's Reference Manual

12 | Commissioning

12.4.2 Air purge function

Installer reference guide
254
4 Read out the flow rate
▪ Do air purge.
▪ Check the function of the valve motor of M1S and M2S.
Replace the valve motor if necessary.
(a)
During pump test run, the unit can operate below the minimum required flow rate.
Purpose
When commissioning and installing the unit, it is very important to remove all air in
the water circuit. When the air purge function is running, the pump operates
without actual operation of the unit and the removal of air in the water circuit will
start.
NOTICE
Before starting the air purge, open the two manual air purging valves and check if the
circuit is sufficiently filled with water. Only if water escapes the valve after opening it,
you can start the air purge procedure.
NOTICE
For safety reasons the air purge function does not work for very high storage tank
temperatures.
Manual or automatic
There are 2 modes for purging air:
▪ Manual: You can set the pump speed to low or high. You can set the position of
the two mixing valves (tank and bypass valve). Air purge must be performed for
both space heating and tank (domestic hot water) circuits.
▪ Automatic: The unit automatically changes the pump speed and fixes the two
mixing valves (tank and bypass valve) at middle position.
Typical workflow
Purging the air from the system should consist of:
1 Purging the air out of the unit with the manual air vent valves
2 Performing a manual air purge
3 Performing an automatic air purge
4 Purging the air out of the unit with the manual air vent valves
INFORMATION
Start by purging the air out of the unit with the manual air vent valves. Only if water
escapes the valve after opening it, you can start the manual air purge function. When
almost all the air is removed, perform an automatic air purge. If necessary, repeat
performing the automatic air purge until you are sure that all air is removed from the
system. During air purge function, pump speed limitation [9‑0D] is NOT applicable.
Finally open the two manual air purging valves and check if the circuit is sufficiently
filled with water.
The air purge function automatically stops after 30 minutes.
(a)
. If the flow rate is too low:
ERLA11~16DAV3+W1 + EBSH/X(B)11+16P30+50DF
Daikin Altherma 3 R ECH₂O
4P663482-1B – 2022.07
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