Air Purge Function - Daikin ERGA08DAV3 Installer's Reference Manual

2 Close all space heating loops that can be closed
(see previous step).
3 Start the pump test run operation (see
perform an actuator test run" on
4 During pump test run operation, go to Sensors.
5 Select the flow rate information. During test run
operation, the unit can operate below the minimum
required flow rate.
6 Modify the bypass valve setting to reach the
minimum required flow rate + 2 l/min.
Recommended procedure for the main zone
INFORMATION
The pump of the additional zone ensures that the minimum
flow rate for correct operation of the unit is guaranteed.
1 Confirm according to the hydraulic configuration
which space heating loops can be closed due to
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 Modify the bypass valve setting to reach the
minimum required flow rate + 2 l/min.
Minimum required flow rate
12 l/min
9.4.2

Air purge function

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.
There are 2 modes for purging air:
▪ Manual: the unit operates with a fixed pump speed and in a fixed
or custom position of the 3-way valve. The custom position of the
3-way valve is a more than helpful feature to remove all air from
the water circuit in the space heating or the domestic hot water
heating mode. Air purge must be performed for both the space
heating and the domestic hot water circuit. The operation speed of
the pump (slow or quick) can also be set.
▪ 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 heating mode.
INFORMATION
For both manual and automatic air purge, 1 temperature
zone is purged with each air purge start. To purge the
other temperature zone, you have to restart the air purge
function. When performing an air purge for the first time,
the main temperature zone will be purged.
ERGA04~08DAV3(A) + EHVZ04+08S18+23DA +
EHVZ04+08S18+23DJ
Daikin Altherma 3 R F
4P495249-1B – 2019.06
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"9.4.4 To —
page 74).
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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
INFORMATION
Start by performing a manual air purge. 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.
The air purge function automatically stops after 30 minutes.
To perform a manual air purge
INFORMATION
When purging the main zone, make sure the setpoint for
the main zone is at least 5°C higher than the actual water
temperature inside the unit.
Conditions: Make sure all operation is disabled. Go to the
Operation menu and turn off Room, Space heating/cooling and
Tank operation.
1 Set the user permission level to Installer. See
change the user permission level" on
2 Go to [A.3]: Commissioning > Air purge.
3 In the menu, set Type = Manual.
4 Select Start air purge.
5 Select OK to confirm.
Result: The air purge starts. It will stop automatically
when air purge cycle is finished.
6 During manual operation, you can change the
desired pump speed. The position of the 3-way valve
must be changed between space heating and
domestic hot water. To change the settings during
the air purge, open the menu and go to Settings.
▪ Scroll to Circuit and set it to Space/Tank.
▪ Scroll to Pump speed and set it to Low/High.
7 To stop the air purge manually:
1 Go to Stop air purge.
2 Select OK to confirm.
INFORMATION
For both manual and automatic air purge, 1 temperature
zone is purged with each air purge start. To purge the
other temperature zone, you have to restart the air purge
function. When performing an air purge for the first time,
the main temperature zone will be purged.
To perform an automatic air purge
INFORMATION
When purging the main zone, make sure the setpoint for
the main zone is at least 5°C higher than the actual water
temperature inside the unit.
Conditions: Make sure all operation is disabled. Go to the
Operation menu and turn off Room, Space heating/cooling and
Tank operation.
1 Set the user permission level to Installer. See
change the user permission level" on
2 Go to [A.3]: Commissioning > Air purge.
9 Commissioning
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page 44.
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"To —
page 44.
Installer reference guide
73