Air Purge Function - Daikin Altherma ERLQ004-006-008CA Reference Manual

9 Commissioning
2 Close all space heating loops that can be closed (see previous
step).
3 Start the pump test run operation (see
actuator test run" on page 61).
4 Go to [6.1.8]: > Information > Sensor information > Flow rate
to check the flow rate. During pump test run operation, the unit
can operate below this minimum required flow rate that is
needed during defrost/backup heater operation.
Bypass valve foreseen?
Yes
Modify the bypass valve setting
to reach the minimum required
flow rate + 2 l/min
Recommended procedure for the main zone
5 Confirm according to the hydraulic configuration which space
heating loops can be closed due to mechanical, electronic, or
other valves.
6 Close all space heating loops that can be closed (see previous
step).
7 Create a thermo request on the main zone only.
8 Wait 1 minute until the unit is stabilized.
9 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).
10 Go to [6.1.8]: > Information > Sensor information > Flow rate
to check the flow rate.
Bypass valve foreseen?
Yes
Modify the bypass valve setting
to reach the minimum required
flow rate + 2 l/min
Minimum required flow rate during defrost/backup heater
operation
04+08 models
16 model
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 pumps operate 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:
Installer reference guide
60
"9.4.4 To perform an
No
In case the actual flow rate is
below the minimum flow rate
(required during defrost/backup
heater operation), modifications
at hydraulic configuration are
required. Increase the space
heating loops that can NOT be
closed or install a pressure
controlled bypass valve.
No
In case the actual flow rate is
below the minimum flow rate
(required during defrost/backup
heater operation), modifications
at hydraulic configuration are
required. Increase the space
heating loops that can NOT be
closed or install a pressure
controlled bypass valve.
12 l/min
15 l/min
▪ Manually: the unit will operate with a custom pump speed and in a
custom position of the 3-way valve (space heating/domestic hot
water). The custom position of the 3-way valve is a helpful feature
to remove all air from the water circuit in the space heating or the
domestic hot water heating mode. The operation speed of the
pump (slow or quick) can also be set.
▪ Automatic: the unit automatically changes the pump speed and
the position of the 3-way valve (space heating/domestic hot water)
between the space heating or 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.
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 on both zones.
When almost all the air is removed, perform an automatic
air purge on both zones. 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.
Make sure the user interface shows the home screens and that the
space heating and domestic hot water demands are turned off.
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.
Prerequisite: Make sure the user interface shows the home screens
and that the space heating and domestic hot water demands are
turned off.
1 Set the user permission level to Installer. See
permission level to Installer" on
2 Set the air purge mode: go to [A.7.3.1]
Commissioning > Air purge > Type.
3 Select Manual and press
4 Go to [A.7.3.4] > Installer settings > Commissioning > Air
purge > Start air purge and press
function.
Result: The manual air purge starts and the following screen
appears.
Tue
Air purge
Flow rate 0.5 l/min
Speed Low
Circuit SHC
Stop Adjust Scroll
5 Use the and buttons to scroll to Speed.
6 Use the and buttons to set the desired pump speed.
Result: Low
Result: High
"To set the user
page 39.
> Installer settings >
.
to start the air purge
01:18
ERLQ004~008CA + EHVZ04+08S18CB
Daikin Altherma – Low temperature split
4P401676-1 – 2015.02