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7 COMMISSIONING
7.1 Overview
After installation, and once the field settings have been
defined, the installation personnel is obliged to verify the
correctness of the operations. Follow the steps below to
perform the test run.
This chapter describes how the test run can be carried
out once the installation is complete, and other relevant
information.
The test run usually includes the following stages:
1. Review the "Checklist Before Test Run".
2. Implement the test run.
3. Correct the errors before the test run.
4. Run the system.
7.2 Precautions When Commissioning
WARNING
During the test run, the outdoor unit operates at
the same time with indoor units connected to it. It
is very dangerous to commission indoor units
during the test run.
Do not insert fingers, sticks, or other items into
the air inlet or outlet. Do not remove the fan
mesh cover.
NOTE
Note that the required input power may be
higher when this unit is run for the first time. This
phenomenon is due to the compressor which
needs to run for 50 hours before it can achieve a
stable operating and power consumption state.
Make sure the power supply is turned on 12
hours before operations so that the crankcase
heater is properly energized. This is also to
protect the compressor.
INFORMATION
i
The test run can be carried out when the
ambient temperature is within the required range
as Fig.7.1.
Avg. indoor temperature °C
43
35
Test run
(cooling)
12
Test run
(heating)
-25
-5
5
30
During the test run, the outdoor units and indoor units will
start at the same time. Make sure all the preparations for
the outdoor units and indoor units have been completed.
Out of
range
55
Min. outdoor ambient
temperature /°C
Fig.7.1
7.3 Checklist Before Commissioning
Once this unit is installed, check the following items first.
After all the following checks have been completed.
Installation
Check if the unit is installed correctly to prevent
strange noises and vibrations when the unit starts.
Field wiring
Based on the wiring schematic and the relevant
regulations, make sure the field wiring is based on
the instructions described in section 5.10 on
connecting wires.
Earth wirings
Make sure the earth wirings is connected
correctly, and the earthing terminal is tight.
Insulation test of main circuit
Use the megameter of 500V, apply a voltage of
500V DC between the power terminal and the
earth
terminal.
Check
resistance is above 2 MΩ. Do not use the
megameter on the transmission line.
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or locally
installed protection devices comply with the size
and type specified in section 4.4.2 on the
requirements for safety devices. Make sure you
use fuses and protection devices.
Internal wiring
Visually inspect if the connections between the
electrical component box and the interior of the
unit is loose, or if the electrical components are
damaged.
Piping dimensions and insulation
Make sure the installation piping dimensions are
correct, and the insulation work can be carried out
normally.
Stop valve
Make sure the stop valve is open on both the
liquid, low pressure and high pressure gas sides.
Equipment damage
Check for damaged components and extruded
piping inside the unit.
Refrigerant leak
Check for refrigerant leaks inside the unit. If there
is a refrigerant leak, try to repair the leak. If the
repair is not successful, please call the local
dealer. Do not come in contact with the refrigerant
leaking from the refrigerant piping connections. It
may cause frostbite.
Oil leak
Check if there is oil leaking from the compressor.
If there is an oil leak, try to repair the leak. If the
repair is not successful, please call the local
dealer.
Air inlet/outlet
Check for paper, cardboard or any other material
that may obstruct the air inlet and outlet of the
equipment.
Add additional refrigerant
The amount of refrigerant to be added to this unit
should be marked on the "Confirmation Table"
which is placed at electrical control box front
cover.
Installation date and field settings
Make sure the installation date is recorded on the
label of the electric control box cover, and the field
settings are recorded as well.
that
the
insulation
V.1
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