Commissioning; Overview: Commissioning; Precautions When Commissioning; Checklist Before Commissioning - Daikin CHYHBH05AA Installer's Reference Manual

Domestic hot water operation
Not applicable for Switzerland
The domestic hot water supply has priority over space heating
performed by the gas boiler. If the flow sensor detects a domestic
hot water demand of more than 2 l/min, space heating by the gas
boiler will be interrupted. After the fan has reached speed code and
ignition is done, the boiler controller goes into domestic hot water
mode.
During the domestic hot water operation, the fan speed and hence
the appliance power are controlled by the gas boiler controller so
that the domestic hot water temperature reaches the domestic hot
water temperature setting.
The domestic hot water supply temperature must be set on the user
interface of the hybrid module. See the user reference guide for
more details.
Domestic hot water comfort function/Frost protection/Keep
hot function
Not applicable for Switzerland
appears on the display when either the domestic hot water comfort
function, the frost protection function or the keep hot function is
active.
space heating operation
When a space heating request is received from the indoor module,
the fan is started, followed by the ignition, and the space heating
operation mode. During the space heating operation, the fan speed
and hence the appliance power are controlled by the gas boiler
controller so that the space heating water temperature reaches the
desired space heating supply temperature. During the space heating
operation, the requested space heating supply temperature is
indicated on the operating panel.
The space heating supply temperature must be set on the user
interface of the hybrid module. See the user reference guide for
more details.
10

Commissioning

10.1

Overview: Commissioning

Typical workflow
Commissioning typically consists of the following stages:
1 Checking the "Checklist before commissioning".
2 Performing an air purge.
3 Performing a test run for the system.
4 If necessary, performing a test run for one or more actuators.
5 If necessary, performing an underfloor heating screed dryout.
10.2

Precautions when commissioning

INFORMATION
During the first running period of the unit, the required
power may be higher than stated on the nameplate of the
unit. This phenomenon is caused by the compressor, that
needs a continuous run time of 50 hours before reaching
smooth operation and stable power consumption.
NOTICE
NEVER operate the unit without thermistors and/or
pressure sensors/switches. Burning of the compressor
might result.
CHYHBH05+08AA + EHYKOMB33A
Daikin hybrid for multi heat pump – heat pump module
4P471761-1A – 2017.10
10.3

Checklist before commissioning

Do NOT operate the system before the following checks are OK:
You read the complete installation instructions, as
described in the installer reference guide.
The indoor unit is properly mounted.
The outdoor unit is properly mounted.
The gas boiler is properly mounted.
The following field wiring has been carried out according
to this document and the applicable legislation:
▪ Between the local supply panel and the outdoor unit
▪ Between indoor unit and outdoor unit
▪ Between the local supply panel and the indoor unit
▪ Between the indoor unit and the valves (if applicable)
▪ Between the indoor unit and the room thermostat (if
applicable)
▪ Between the indoor unit and the domestic hot water
tank (if applicable)
▪ Between the gas boiler and the local supply panel
(only applicable in case of hybrid system)
The communication cable between the gas boiler and
the indoor unit is properly mounted.
The system is properly earthed and the earth terminals
are tightened.
The fuses or locally installed protection devices are
installed according to this document, and have not been
bypassed.
The power supply voltage matches the voltage on the
identification label of the unit.
There are NO loose connections or damaged electrical
components in the switch box.
There are NO damaged components or squeezed
pipes on the inside of the indoor and outdoor units.
There are NO refrigerant leaks.
The refrigerant pipes (gas and liquid) are thermally
insulated.
The correct pipe size is installed and the pipes are
properly insulated.
There is NO water leak inside the indoor unit.
There is NO water leak inside the gas boiler.
There is NO water leak in the connection between the
gas boiler and the indoor unit.
The shut-off valves are properly installed and fully open
(field supply).
The stop valves (gas and liquid) on the outdoor unit are
fully open.
The air purge valve is open (at least 2 turns).
The pressure relief valve purges water when opened.
The gas boiler is switched ON.
Setting . is correctly set on the gas boiler. The setting
must be 0.
10 Commissioning
Installer reference guide
69