What is the reason of chiller trip?
This may be due to a dirty or blocked condenser, dirty air filter, failing or failed cooling fan, high ambient temperature, or over-charging of the refrigerant system. The refrigerant discharge pressure is too low.
What causes low suction pressure on a chiller?
If the suction pressure is low, it could indicate a brine flow problem, lack of refrigerant, plugged metering device, plugged filters, high oil level in the chiller, or a faulty gauge.
How do you fix low suction pressure?
Low suction pressure in a compressor
- Set the indoor temperature high if it is low.
- Clean or replace the filter, if it is chocked.
- Set the thermostatic valve at optimum superheat degree to avoid the low suction pressure.
- Clean the air duct.
What is the normal suction pressure?
The normal range of the suction pressure is 0.8–1.2 MPa. If the suction pressure is greater than 1.2 MPa, connect a rubber hose for the pressure gauge to the gas pipe needle valve for the outdoor unit, and rotate open the pressure gauge to slowly release refrigerant. Start the compressor.
What is antifreeze alarm in chiller?
Most chillers have an antifreeze alarm that will prevent this (if the setting is checked that is). Glycol (antifreeze) would prevent the evaporator splitting but the unit would still be running out side of its design, causing liquid to flood the evaporator and cause the compressor to fail.
What causes low suction?
Apart from refrigerant leaks causing loss of critical charge, the most common problem associated with low suction pressure is: LOW LOAD, i.e., not enough warm, moisture laden airflow across the evaporator coil. Classic causes: Undersized duct or poorly designed and/or poorly installed air distribution system.
What pressure is 410A?
An R-410A system may be operating at over 600 psi and not have the high-pressure safety switch open. Carrier has a unit with the high-pressure switch set at 610 psi. It resets at about 420 psi. The same model has a loss-of-charge liquid-line switch that opens at about 20 psi and resets at about 45 psi.
What happens if suction pressure is low?
Apart from refrigerant leaks causing loss of critical charge, the most common problem associated with low suction pressure is: LOW LOAD, i.e., not enough warm, moisture laden airflow across the evaporator coil.
What type of evaporator is used in York YVAA chiller?
The YVAA compres- sor is one of the most efficient and reliable screw compressors in the industry. The evaporator is a shell and tube, hybrid falling film type heat exchanger. It contains a balance of flooded and falling film technology to optimize efficiency, minimize refrigerant charge, and maintain reliable control.