marc5180
19-06-2009, 07:10 PM
Last year i posted about a lennox unit we had inherited on a maintenance contract.
KVHK48.DVFC
http://www.refrigeration-engineer.com/forums/showthread.php?t=15910&highlight=lennox
Since that post we have had so many problems with it it's untrue.
I got called to it the other day and circuit 2 was tripping on HP ( which is controlled by dampers ).
I checked the dampers and they were closed when the pressure was 24 bar. The dampers aren't seized and the actuator does move.
I can't find a service manual anywhere for this model and i tried to contact lennox but got no answer.
Does anyone know the range the dampers are supposed to work between?
Also what controlls it? I noticed a pressure transducer on circuit 1 but nothing on circuit 2.
There is only 1 actuator that controlls the dampers for both circuit 1 and 2.
KVHK48.DVFC
http://www.refrigeration-engineer.com/forums/showthread.php?t=15910&highlight=lennox
Since that post we have had so many problems with it it's untrue.
I got called to it the other day and circuit 2 was tripping on HP ( which is controlled by dampers ).
I checked the dampers and they were closed when the pressure was 24 bar. The dampers aren't seized and the actuator does move.
I can't find a service manual anywhere for this model and i tried to contact lennox but got no answer.
Does anyone know the range the dampers are supposed to work between?
Also what controlls it? I noticed a pressure transducer on circuit 1 but nothing on circuit 2.
There is only 1 actuator that controlls the dampers for both circuit 1 and 2.