Daikin EHYKOMB33AA2 [82/136] 18 tue
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Daikin EHYKOMB33AA2 [82/136] 18 tue

Daikin EHYKOMB33AA2A [82/136] 18 tue
10 Commissioning
Installer reference guide
82
EVLQ05+08CAV3 + EHYHBH05AA + EHYHBH/X08AA +
EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1A – 2016.02
10.4 Checklist during commissioning
The minimum flow rate is guaranteed in all conditions.
See "To check the water volume and flow rate" in
"6.4Preparing water piping"on page18.
To perform an air purge.
To perform a test run.
To perform an actuator test run.
Underfloor screed dryout function
The underfloor screed dryout function is started (if
necessary).
To perform an air purge on the gas supply.
To perform a test run on the gas boiler.
10.4.1 To check the minimum flow rate
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 Start the pump test run operation (see "10.4.4 To perform an
actuator test run"on page83).
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.
Bypass valve foreseen?
Yes No
Modify the bypass valve setting
to reach the minimum required
flow rate + 2l/min
In case the actual flow rate is
below the minimum flow rate,
modifications at the hydraulic
configuration are required.
Increase the space heating loops
that can NOT be closed or install
a pressure‑controlled bypass
valve.
Minimum required flow rate
05 models 7l/min
08 models 8l/min
10.4.2 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:
▪ Manually: the unit will operate with a fixed pump speed (high or
low), which can be set. The position of the 3-way valve for the
optional domestic hot water tank as well as that of the gas boiler's
bypass valve can also be set. To ensure all air will be removed,
however, it is recommended NOT to adjust their custom position.
▪ Automatic: the pump alternates between high speed, low speed
and standstill position. The position of the 3-way valve
automatically alternates between that for space heating and that
for domestic hot water heating. The gas boiler is continuously
bypassed. To remove air from the gas boiler, perform a manual air
purge on the gas boiler.
Typical workflow
Purging the air from the system should consist of:
1 Performing a manual air purge
2 Performing an automatic air purge
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.
Air purge prerequisites
3 Install air purges on each part of the installation where the pipe
work goes down. (For example on a tank with connections on
top.)
4 Fill the circuit to ±2bar.
5 Purge all radiators and all other air purges installed on the
circuit.
6 Repeat steps 2 and 3 until purging the radiators and the other
points does NOT longer lead to a pressure drop.
7 Make sure that the leaving water temperature home page, room
temperature home page, and domestic hot water home page
are turned OFF.
When an air bubble blocks the pump and there is no flow, a 7H error
can occur. In this case, stop the air purge function and restart the
operation. This will cause the bubble to leave the pump. Make sure
the pressure in the circuit is ±2bar and refill if necessary.
To check if the air purge function is finished, monitor the flow rate. If
it stays constant when the pump is running at high or low speed, the
unit is properly purged. To monitor the flow rate, go to [6.1.8].
The air purge function automatically stops after 42minutes.
To perform a manual air purge
Prerequisite: Make sure that the leaving water temperature home
page, room temperature home page, and domestic hot water home
page are turned OFF.
1 Set the user permission level to Installer. See "To set the user
permission level to Installer"on page51.
2 Set the air purge mode: go to [A.7.3.1] > Installer settings >
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 to start the air purge
function.
Result: The manual air purge starts and the following screen
appears.
01:18
Tue
Air purge
l/min
Low
SHC
Yes
0.5
Flow rate
Speed
Circuit
Bypass
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

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