Air Purge Function - Daikin Altherma 3 H MT F Installer's Reference Manual

11 | Commissioning

11.4.2 Air purge function

Installer reference guide
210
1 Check with the hydraulic configuration which space heating
loops can be closed by mechanical, electronic, or other valves.
2 Close all space heating loops that can be closed (see previous
step).
3 Create a thermo request on the main zone only.
4 Wait 1 minute until the unit is stabilized.
5 If the additional pump is still assisting (the green LED on the
right hand sided pump is ON) increase the flow until the
additional pump is not assisting anymore (LED is OFF).
6 Go to [8.4.A]: Information > Sensors > Flow rate.
7 Read out the flow rate and modify the bypass valve setting to
reach the minimum required flow rate + 2 l/min.
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 safety valve 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.
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 circuit (the
position of the 3-way valve) to Space or Tank. Air purge must be performed for
both space heating and tank (domestic hot water) circuits.
▪ Automatic: The unit automatically changes the pump speed and switches the
position of the 3-way valve between the space heating and the domestic hot
water circuit.
INFORMATION
When air purging in automatic mode, the first air purge is always for the main zone,
the second started air purge is always for the additional zone. To air purge the
domestic hot water tank circuit, choose [A.3.1.5.2] Circuit=Tank at the start of
the manual air purge of the main zone or additional zone.
Typical workflow
Purging the air from the system should consist of:
1 Performing a manual air purge for both zones
2 Performing an automatic air purge for both zones
EPRA08~12EAV3+W1 + ETVZ12S18+23EA6V+9W
Daikin Altherma 3 H MT F
4P634887-1 – 2021.03
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