Commissioning; Overview: Commissioning; Precautions When Commissioning; Checklist Before Commissioning The Outdoor Unit - Daikin SERHQ020BAW1 Installer And User Reference Manual

8 Commissioning

O
U
T
ON
DS1
OFF
A B C
1 2 3 4
I
N
A B C
a
a Cool/heat selector
1 Press BS5 for 5 seconds to re-initialise communication of the
unit.
▪ Cooling: voltage free contact between terminals A and C is
open
▪ Heating: voltage free contact between terminals A and C is
closed
X1A
1
R1 C1 R3 R4 C2 R2
X1M
A B C
INFORMATION
Thermostat input has
temperature setpoint.
It is possible that the leaving water temperature becomes
lower than the setpoint if the unit is controlled by room
temperature.
8 Commissioning
8.1

Overview: Commissioning

This chapter describes what you have to do and know to
commission the system after it is configured.
Typical workflow
Commissioning typically consists of the following stages:
1 Checking the "Checklist before commissioning the outdoor
unit".
2 Checking the "Checklist before commissioning the indoor unit".
3 Performing a final check.
4 Performing a test run.
5 If necessary, correcting errors after abnormal completion of the
test run.
6 Operating the system.
8.2

Precautions when commissioning

DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
Installer and user reference guide
40
priority over leaving water
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT only the outdoor
unit, but the connected indoor unit will operate as well.
Working on an indoor unit while performing a test operation
is dangerous.
CAUTION
Do NOT insert fingers, rods or other objects into the air
inlet or outlet. Do NOT remove the fan guard. When the
fan is rotating at high speed, it will cause injury.
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
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
CAUTION
▪ Make sure that the circuit breaker on the power supply
panel of the installation is switched off.
▪ Make sure that the power wire is securely attached.
▪ Make sure there is no missing or wrong N-phase.
8.3 Checklist before commissioning
the outdoor unit
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit MUST be closed, ONLY then
can the unit be powered up.
You read the complete installation and operation
instructions, as described in the installer and user
reference guide.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Field wiring
Be sure that the field wiring has been carried out
according to the instructions described in the chapter
"6.9 Connecting the electrical wiring" on page
according to the wiring diagrams and according to the
applicable legislation.
Power supply voltage
Check the power supply voltage on the local supply panel.
The voltage MUST correspond to the voltage on the
identification label of the unit.
Earth wiring
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a
voltage of 500 V DC between power terminals and earth.
NEVER use the megatester for the transmission wiring.
SERHQ020~032BAW1 + SEHVX20~64BAW
26,
Split packaged air-cooled water chiller
4P508020-1B – 2018.04