Grizzly
09-02-2011, 07:55 PM
Can anyone help please.
I have been to a site today working with colleagues from another region.
Where there are 2 of the above chillers both with 2 systems. Danfoss Turbcor comps (1 on each system.)
Either system is only using 1 system due to the low ambients and load.
The lag chiller ramps up and down and on and off around it's set point. However the lead chiller will cut in at set point plus 2 degrees. Say 9.0c SP. Therefore at 11.0c it starts and pulls the leaving water temp down to 9.0c. ramping down as it approaches SP.
What it will not do is shut down it will trundle along on minimum load with the leaving temp going down to approx 7/8 degrees. Staying at this below set point temp with the comp gently loading slightly and then unloading.
Has anyone any ideas.
Secondly can anyone help with the controller settings or a manual for the above.
I have a code which allows me to check and change a lot of the control parameters.
But I feel there is info I am missing?
The controller is badged up RC, but is based upon a Carel Pco.
Any help or advise would be appreciated.
The main UK agents are Excel Refrigeration I am led to believe, but sadly apparently they choose to not assist in this instance. As it's not their site I do not blame them but can anyone help?
Grizzly
I have been to a site today working with colleagues from another region.
Where there are 2 of the above chillers both with 2 systems. Danfoss Turbcor comps (1 on each system.)
Either system is only using 1 system due to the low ambients and load.
The lag chiller ramps up and down and on and off around it's set point. However the lead chiller will cut in at set point plus 2 degrees. Say 9.0c SP. Therefore at 11.0c it starts and pulls the leaving water temp down to 9.0c. ramping down as it approaches SP.
What it will not do is shut down it will trundle along on minimum load with the leaving temp going down to approx 7/8 degrees. Staying at this below set point temp with the comp gently loading slightly and then unloading.
Has anyone any ideas.
Secondly can anyone help with the controller settings or a manual for the above.
I have a code which allows me to check and change a lot of the control parameters.
But I feel there is info I am missing?
The controller is badged up RC, but is based upon a Carel Pco.
Any help or advise would be appreciated.
The main UK agents are Excel Refrigeration I am led to believe, but sadly apparently they choose to not assist in this instance. As it's not their site I do not blame them but can anyone help?
Grizzly