Kirky
03-04-2012, 08:42 AM
Hi all hope all is well
Got a on going problem with a Trane chiller unit ECGAN900 R407C. The unit has been in use for 6 years and from the very start has suffered with HP faults during summer ambients of 22 degC and above. There are two separate circuits on the chiller circuit one tripping as soon as the sun peers round the clouds. They have struggled by for the past 6 years on circuit 2. We routinely chemically clean the coils and regularly check the fans. We have had Trane in and they have changed the HP cutouts on both circuits. We have also put up a sun shade as the coil on circuit one sits in direct sunlight most of the day. This year things have gone from bad to worse both circuits are tripping during relatively low ambient conditions. 15-20 deg. I have cleaned the coils and fans are ok. We have good water flow. I have checked the HP cutouts they are ok tripping at 28 bar as set. The site is a papermill so going to clean coils again I suppose it could be non condensables but Trane usually send good engineers. Many have tried over the years to sort the problem and now it's my turn so any pearls of wisdom gratefully received
Got a on going problem with a Trane chiller unit ECGAN900 R407C. The unit has been in use for 6 years and from the very start has suffered with HP faults during summer ambients of 22 degC and above. There are two separate circuits on the chiller circuit one tripping as soon as the sun peers round the clouds. They have struggled by for the past 6 years on circuit 2. We routinely chemically clean the coils and regularly check the fans. We have had Trane in and they have changed the HP cutouts on both circuits. We have also put up a sun shade as the coil on circuit one sits in direct sunlight most of the day. This year things have gone from bad to worse both circuits are tripping during relatively low ambient conditions. 15-20 deg. I have cleaned the coils and fans are ok. We have good water flow. I have checked the HP cutouts they are ok tripping at 28 bar as set. The site is a papermill so going to clean coils again I suppose it could be non condensables but Trane usually send good engineers. Many have tried over the years to sort the problem and now it's my turn so any pearls of wisdom gratefully received