Jad Zeitouni
04-04-2015, 11:29 PM
Hello,
A cold room is designed to lower the temperature of tortilla bread from 0deg to below - 20deg
It is made of 4 cooling units (copeland compressors) of 10HP with Frigabohn evaporators ( I chose a slightly bigger evaporators to reach a lower temperature - 26deg (bakery storage specifications)) the system is build to freeze more than 8 tons of tortilla bread in around 24hrs.
The system worked well for two weeks before problems started to arise , The compressors started to ice up randomly as well as the evaporators
I put the cooling units on manual defrost several times but in each time one or two of the compressor started cooling cycle before defrost ends (45min defrost time)
I checked the defrost settings and all was electric defrost
Checked the valves and everything was okay
temperature setpoint is -27deg
during the problem the room was not fully loaded ( 4 tons and below)
Could the problem be because the room is not loaded as designed and the temperature is dropping quickly due to the high cooling capacity ?
should I turn off two compressors when the room is not fully loaded ( 8 tons)?
Can anyone please suggest a solution?
Thank you,
A cold room is designed to lower the temperature of tortilla bread from 0deg to below - 20deg
It is made of 4 cooling units (copeland compressors) of 10HP with Frigabohn evaporators ( I chose a slightly bigger evaporators to reach a lower temperature - 26deg (bakery storage specifications)) the system is build to freeze more than 8 tons of tortilla bread in around 24hrs.
The system worked well for two weeks before problems started to arise , The compressors started to ice up randomly as well as the evaporators
I put the cooling units on manual defrost several times but in each time one or two of the compressor started cooling cycle before defrost ends (45min defrost time)
I checked the defrost settings and all was electric defrost
Checked the valves and everything was okay
temperature setpoint is -27deg
during the problem the room was not fully loaded ( 4 tons and below)
Could the problem be because the room is not loaded as designed and the temperature is dropping quickly due to the high cooling capacity ?
should I turn off two compressors when the room is not fully loaded ( 8 tons)?
Can anyone please suggest a solution?
Thank you,