Daikin ALTHERMA, Installer'S Reference Manual

Page: 223 / 280

12 | Commissioning
Installer reference guide
223
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
4P620241-1 – 2020.06
3 Start the pump test run (see "Actuator test run" [ 4 226]). —
4 Read out the flow rate
(a)
and modify the bypass valve setting to
reach the minimum required flow rate + 2 l/min.
—
(a)
During pump test run, the unit can operate below the minimum required flow rate.
12.4.2 Air purge function
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.
Typical workflow
Purging the air from the system should consist of:
1 Performing a manual air purge
2 Performing an automatic air purge
NOTICE
For models with integrated backup heater : The unit contains an automatic air purge
valve on the backup heater. Make sure it is open. All automatic air purge valves in
the system (in the unit, and in the field piping –if any) must remain open after
commissioning.
For other models : The unit contains a manual air purge valve. Make sure it is closed.
Only open it when performing an air purge.
NOTICE
When purging air with the manual air purge valve of the unit, collect any fluid that
might leak out of the valve. If this fluid is NOT collected, it might drip on internal
components and damage the unit.