15
Unit Installation
5.2 Test run
Test run is testing whether the unit can run normally via preoperation. If the unit cannot run normally,
find and solve problems until the test run is satisfactory. All inspections must meet the requirements before
performing the test run. Test run should follow the content and steps of the table below:
The following procedure should be executed by experience and qualified maintenance men.
No.
Start up the pretest procedure
Notice: before test, ensure that all power must be cut off, including the far- end power switch, otherwise, it may cause casualty.
1
Ensure that the compressor of the unit is preheated for 8h.
Caution: heat the lubricating oil at least 8h in advance to prevent refrigerant from mixing with the lubricating oil, which may cause
damage to the compressor when starting up the unit.
2
Check whether the oil temperature of the compressor is obviously higher than the outdoor ambient temperature.
Caution: if the oil temperature of the compressor is obviously higher than the outdoor ambient temperature, it means that the heating
tape of compressor is damaged. In that case, the compressor will be damaged easily. Therefore, repair the heating tape before using
the unit.
3
Check whether the phase sequence of the main power supply is correct. If not, correct the phase sequence firstly.
Recheck the phase sequence before start-up to avoid reverse rotation of the compressor which may damage the unit.
4
Apply the universal electric meter to measure the insulation resistance between each phase and earth as well as between
phases.
Caution: defective earthing may cause electric shock.
No.
Ready to start
1
Cut off all temporary power supply, resume all the insurance and check the electricity for the last time.
Check the power supply and voltage of the control circuit; _____V must be ±10% within the range of rated operating power.
No.
Start up the unit
1
Check all the conditions needed to start up the unit: oil temperature, mode, required load etc.
2
Start up the unit, and observe the operation of compressor, electric expanding valve, fan motor and water pump etc.
Note: the unit will be damaged under abnormal running state. Do not operate the unit in states of high pressure and high
current.
Others:
Items for
acceptance after
debugging
Estimation or suggestion on the general running situation: good, modify
Identify the potential problem (nothing means the installation and debugging are in accordance with the
requirements.)
a. problem of power supply and electric control system:
b. problem of load calculation:
c. refrigerant system:
d. noise problem:
e. problem of indoor and piping system:
h. other problems:
During operation, it is needed to charge for the maintenance due to non-quality problems such as incorrect
installation and maintenance.
Acceptance
Is the user trained as required? Please sign. Yes( ) No( )
