laf100
04-06-2013, 12:02 PM
Hey all,
Retrofitting a Frascold screw to a Daikin chiller, because the Daikin screw is beyond repair, and a replacement is N/A - apparently! I just need to get to the bottom of the original load sequence/step control; I have a wiring diagram and a second working chiller to learn from, but something does not add up:
There are 3 loader SV marked on the wiring diagram as - 12, 40 & 70%.
After the SD start 12% is energised for around ten seconds, when the LCD controller shows "step 1/3" the 40% SV is on, at 2/3 both 40 AND 70% are energised, then finally at 3/3 we go back to just the 40% valve on its own again!
The fact that the machine is only achieving around 1.8°C Delta T, and is pulling circa 35 amps per phase, when the O/L is set for 75A, and the fuse rating fro the chiller is 160A - leads to me to believe that it really is only at 40% - which is a worry!
Model is an EUWA60KAXSDY1 on R134a, circa 1999.
Any help much appreciated.
LAF
Retrofitting a Frascold screw to a Daikin chiller, because the Daikin screw is beyond repair, and a replacement is N/A - apparently! I just need to get to the bottom of the original load sequence/step control; I have a wiring diagram and a second working chiller to learn from, but something does not add up:
There are 3 loader SV marked on the wiring diagram as - 12, 40 & 70%.
After the SD start 12% is energised for around ten seconds, when the LCD controller shows "step 1/3" the 40% SV is on, at 2/3 both 40 AND 70% are energised, then finally at 3/3 we go back to just the 40% valve on its own again!
The fact that the machine is only achieving around 1.8°C Delta T, and is pulling circa 35 amps per phase, when the O/L is set for 75A, and the fuse rating fro the chiller is 160A - leads to me to believe that it really is only at 40% - which is a worry!
Model is an EUWA60KAXSDY1 on R134a, circa 1999.
Any help much appreciated.
LAF