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Vertiv I Liebert LPC I User Manual
3.3.4 Detecting the humidifier
On closing the humidifier breaker, change the set point of the humidity on the controller. This
will start the humidifier (or manual start) and then check each phase current to ensure the
humidifier function is on.
3.3.5 Condenser detection
Closing the condenser open space, the outdoor fan movable contact point, and to check
whether the normal running direction is detected by the input voltage.
3.3.6 Static charge
After the successful completion of vacuuming process, rapidly static charge the amount of
liquid refrigerant in the refrigeration system .
The high side and low side of the high and low pressure gauge are connected to the
composite needle and the electronic expansion valve needle ball valve at the mouthpiece
liquid respectively. The low-pressure valve is closed and the high-pressure valve is opened to
release most of the refrigerant charge to the condenser. If incase the condenser is unable to
accept the filling of refrigerant charge, the low-pressure valve is opened again, charging
refrigerant into the evaporator.
Static filling process to maintain the refrigerant container is placed upside down. Please keep
filling during warm-up state of the compressor.
3.3.7 Dynamic filling
If the compressor starting warm-up time is not enough, then one of the following methods
should be adopted to prevent compressor damage caused by flooding of the liquid
refrigerant:
Method 1: The open space open air conditioning compressor, and then adjust the set
temperature of the unit, the unit present cooling demand, the compressor contactor pull, and
then the compressor is turned off breaker is closed quickly after 1-2 seconds, wait five
minutes and then repeating the above steps (1-2 seconds to open the closed space, open
space disconnect, wait 5 minutes), repeated three times until the compressor and the liquid
is evaporated to form a film and can be started safely and operation of the compressor.
Method 2: Before starting the compressor housing lower portion with a blow dryer or other
heat source of about safety 30min, to vaporize any liquid refrigerant. By setting the
temperature / humidity, the unit has only cooling function activates the compressor (or
manual start) commissioned.
Compound pressure gauge valve fully closed, manually start the compressor operation
(output of the compressor 76%), when the system is operating normally, the low pressure
valve to maintain a small opening degree, reduce the risk of damage to the compressor.
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