Specific to the chillers and heat pumps without liquid receiver with comparatively higher evaporator of the internal volume
In nominal terms, the condensing pressure and hypothermia may be normal
At low loads and low temperatures refrigerant boiling point more accumulates in the condenser, increase condensing temperature and subcooling, and in case of overload
Check the evaporator and condenser internal volumes
Specific to the chillers and heat pumps without liquid receiver
Low superheat suction gas and short running times to increase the amount of oil coming out of the compressor
Compressor oil charge may be more than capacitor internal volume
For collection of oil in the capacitor reduces the size of the condensation surface. This will increase the temperature of condensation
Check the oil level in the compressor, if possible.
Check the compressor running times and suction gas superheat
How to determine: non-condensable gases
Non-condensable gases have the same effect as excessive. Condensing pressure will rise and will not be freezing temperatures.
Pressure gauge can sometimes vibrate because of non-condensable gases
Non-condensable gases will collect in the top of the condenser, which makes it the best place to purge system
How to determine: the Dirt in the water capacitor
Of admixtures in water or in brine side may cause clogging or even block some water channels. This will increase pressure condensing
Capacitor can be cleaned by pumping water in the opposite direction compared to the normal operation. Cleaning agents can also be used
Recommended filters used for plate heat exchangers
How to determine: the Air in the water side of conden
The air in the direction of the condenser water heat transfer impai
The air in the circulation pump will reduce the water or brine flow
In addition to increasing the condensation temperature, air tours can lead characteristic noise, which will help to identify the cause of the problem
Verify that the expansion tank (A) is used on the discharge side of the circulating pump and pressure inside the tank properly
How to determine: High loads from the suction side
On a hot day with high humidity, download refrigerant from the system of air conditioning may exceed refrigerant cooler power of water
If the expansion valve (A) does not have the MOP function, the suction pressure (B) will be high. Refrigerant capacity will increase causing a high load on the condenser and the high condensing temperature (C)
Chillers