haris
31-05-2012, 07:23 AM
Dear All,
I am an instrumentation engineer and have to look after a cold storage as well. This is an Ammonia unit with both freezer and chiller operations. I have an issue - there is a lot of icing right under the evaporators - they drip and eventually form ice on the floor which makes operations very difficult.
I got the evaporators checked, the drain trays were misaligned and also - there was icing on the drains. I believe it has to do with the drain heaters - they were 20Watts/M self regulating at 10C. My concern is, the room temperature stays between -18 or -26 C - wouldn't the drain heaters remain ON considering they are regulated at 10C.
Should I use non regulated heaters and control their switching using timers and contactors?
Also, I have started noticing ICE on the panel walls and ceiling - right where the blast hits; is it due to moisture?
Regards,
Haris
I am an instrumentation engineer and have to look after a cold storage as well. This is an Ammonia unit with both freezer and chiller operations. I have an issue - there is a lot of icing right under the evaporators - they drip and eventually form ice on the floor which makes operations very difficult.
I got the evaporators checked, the drain trays were misaligned and also - there was icing on the drains. I believe it has to do with the drain heaters - they were 20Watts/M self regulating at 10C. My concern is, the room temperature stays between -18 or -26 C - wouldn't the drain heaters remain ON considering they are regulated at 10C.
Should I use non regulated heaters and control their switching using timers and contactors?
Also, I have started noticing ICE on the panel walls and ceiling - right where the blast hits; is it due to moisture?
Regards,
Haris