LT-S-(L) Technical manual
8.1.2
Check list during operation
1
）
Start up compressor for 0.5~1 second. Confirm the rotation direction through
monitoring suction and discharge pressure.(correct rotation direction: suction
pressure goes down and discharge pressure goes up at the same time)
2
）
Check if the lubricant of the oil sight glass on external oil line is full after
start up. In case of abnormal, please check pressure differential between high and
medium pressure (oil pressure differential supply), oil filter and oil line solenoid
valve.
3
）
There will be some oil foams in the oil separator during start up but only in a
short time. When working under rated working condition, the foam will disappear.
Otherwise it means the system is without sufficient oil or there is oil carryover
problem.
4
）
The operating conditions of the compressor should be adjusted in the
following ways: R404A exhaust temperature should be higher than 15K
condensation temperature, R22 exhaust temperature should be higher than 25K
condensation temperature;
5
）
The whole system should pass vibration test, especially the piping. If there is
abnormal vibration and noise from compressor, please contact HANBELL.
6
）
Below items need to be checked every day, when compressor is operating in
a long time: Compressor running data such as 3 phase voltage, current, etc. Oil
temperature, oil level, all the sensors, wiring junctions, and oil line sight glass.
7
）
When condensing unit operates in job site, we should be aware of its
complementary devices and the maintenance schedule after first commissioning.
8
）
To keep the lubricant viscosity normal at low ambient temperature and to
ensure the function of bearing lubrication, it is suggested to keep the oil heater in
the external oil separator “on” after compressor is turned off. This is to prepare
for the next start up.
9
）
In the running state of the compressor, the liquid supply valve shall not be
closed for evacuation.
