Checklist During Commissioning; To Perform A Wiring Error Check; To Check The Minimum Flow Rate; Air Purge Function - Daikin CHYHBH05AA Installer's Reference Manual

10 Commissioning
The minimum water volume is guaranteed in all
conditions. See "To check the water volume" in
"6.4 Preparing water piping" on
INFORMATION
The software is equipped with an "installer-on-site" mode
([4‑0E]), that disables automatic operation by the unit. At
first installation, setting [4‑0E] is by default set to "1",
meaning automatic operation is disabled. All protective
functions are then disabled. If the user interface home
pages are off, the unit will NOT operate automatically. To
enable automatic operation and the protective functions,
set [4‑0E] to "0".
36 hours after the first power-on, the unit will automatically
set [4‑0E] to "0", ending "installer-on-site" mode and
enabling the protective
installation – the installer returns to the site, the installer
has to set [4‑0E] to "1" manually.
10.4

Checklist during commissioning

The order mentioned in following commissioning checklist MUST be
followed.
To perform a wiring check.
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
To perform an air purge.
To perform a test run when the hybrid is in heating
mode.
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.
To perform a test run on the airconditioning DX unit in
cooling mode.
10.4.1

To perform a wiring error check

INFORMATION
▪ You only have to perform a wiring error check if you are
not sure that the electrical wiring and piping is
connected correctly.
▪ If you perform a wiring error check, the hybrid for multi
indoor unit will not operate by heat pump for 72 hours.
During this time, the gas boiler will take over the hybrid
operation.
Prerequisite: Indoor and outdoor unit must be installed and
connected.
Prerequisite: Make sure that the water temperature in the system is
>25°C.
1 Heat up the water temperature in the system >25°C.
NOTICE
If the water temperature in the system is ≤25°C, the plate
heat exchanger will freeze and damage occurs.
Installer reference guide
70
page 18.
functions. If – after first
page 18.
2 Proceed with the steps as described in the outdoor unit
installation manual or outdoor unit installer reference guide to
perform a wiring error check.
NOTICE
Make sure that the minimum required water flow in the unit
is guaranteed.
10.4.2

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
actuator test run" on page 72).
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
Modify the bypass valve setting
to reach the minimum required
flow rate + 2 l/min
Minimum required flow rate
05+08 models
10.4.3

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
Daikin hybrid for multi heat pump – heat pump module
"10.4.5 To perform an
No
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.
9 l/min
CHYHBH05+08AA + EHYKOMB33A
4P471761-1A – 2017.10