10 Commissioning
Installation manual
19
50A9
R32 Split series
3P600450-8T – 2022.09
3
Turn ON the main power supply.
10
Commissioning
NOTICE
General
commissioning
checklist.
Next
to
the
commissioning instructions in this chapter, a general
commissioning checklist is also available on the Daikin
Business Portal (authentication required).
The general commissioning checklist is complementary to
the instructions in this chapter and can be used as a
guideline and reporting template during commissioning and
hand-over to the user.
NOTICE
ALWAYS operate the unit with thermistors and/or pressure
sensors/switches. If NOT, burning of the compressor might
be the result.
10.1
Checklist before commissioning
1
After the installation of the unit, check the items listed below.
2
Close the unit.
3
Power up the unit.
The
indoor unit
is properly mounted.
The
outdoor unit
is properly mounted.
The system is properly
earthed
and the earth terminals
are tightened.
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.
The
stop valves
(gas and liquid) on the outdoor unit are
fully open.
Drainage
Make sure drainage flows smoothly.
Possible consequence:
Condensate water might drip.
The indoor unit receives the signals of the
user interface
.
The specified wires are used for the
interconnection
cable
.
The
fuses, circuit breakers,
or locally installed protection
devices are installed according to this document, and
have NOT been bypassed.
Check if marks (room A and B) on the wiring and piping
match for each indoor unit.
Check if the priority room setting is set for 2 or more
rooms. Keep in mind that the DHW generator for Multi or
the Hybrid for Multi shall not be selected as the priority
room.
10.2
Checklist during commissioning
To perform a
wiring
check.
To perform an
air purge
.
To perform a
test run
.
10.3
Trial operation and testing
Before starting the test run, measure the voltage at the
primary side of the
safety breaker
.
The
piping and wiring work
match.
The
stop valves
(gas and liquid) on the outdoor unit are
fully open.
Initialization of the Multi system can take several minutes depending
on the number of indoor units and options used.
10.3.1
To perform a test run
INFORMATION
If the unit runs into an error during commissioning, see the
service manual for the detailed troubleshooting guidelines.
Prerequisite:
Power supply MUST be in the specified range.
Prerequisite:
Test run operation may be done in cooling or heating
mode.
Prerequisite:
Test run should be done in accordance with the
operation manual of the indoor unit to make sure that all functions
and parts are working properly.
1
In cooling mode, select the lowest programmable temperature.
In heating mode, select the highest programmable temperature.
2
Measure the temperature at the indoor unit inlet and outlet after
running the unit for about 20 minutes. The difference should be
more than 8°C (cooling) or 15°C (heating).
3
First check operation of each unit individually, then check
simultaneous operation of all indoor units. Check both heating
and cooling operation.
4
When test run is finished, set the temperature to a normal level.
In cooling mode: 26~28°C, in heating mode: 20~24°C.
INFORMATION
▪ Test run can be disabled if necessary.
▪ After the unit is turned OFF, it cannot be started again
for 3 minutes.
▪ During cooling operation, frost may form on the gas
stop valve or other parts. This is normal.
INFORMATION
▪ Even if the unit is turned OFF, it consumes electricity.
▪ When the power turns back on after a power break, the
previously selected mode will be resumed.
