Rio69
23-06-2009, 09:55 AM
Hi,
I have interesting situation.
We have installed air cooler of Hans Guentner company , and after few days of operation, customer reported cooler break-down.
After inspection, we have tried to claim from manufacturer warranty, in order to get the new cooler for replacement.
We have got the answer that the cooler was broken because of freezing from inside.
I have reminded them that cooling medium is 30% mixture of ethylene glycol and water, and in the room is +8degC, so there is no way to freeze it from outside.
The glycol is cooled by ammonia at -8deC, by plate heat exchanger, and glycol temperature is -5/-1degC, so if glycol is frozen, it will be in plate heat exchanger.
In the same cooling system, there is 15 air cooler, working fine.
Anyway, they said that according to pictures, it must be destroyed by frozen medium inside the cooler, and believe it or not, that warranty can not be accepted, and that we are free to order new cooler...
Please see pictures enclosed, and please tell me that I am not crazy....
Rio
I have interesting situation.
We have installed air cooler of Hans Guentner company , and after few days of operation, customer reported cooler break-down.
After inspection, we have tried to claim from manufacturer warranty, in order to get the new cooler for replacement.
We have got the answer that the cooler was broken because of freezing from inside.
I have reminded them that cooling medium is 30% mixture of ethylene glycol and water, and in the room is +8degC, so there is no way to freeze it from outside.
The glycol is cooled by ammonia at -8deC, by plate heat exchanger, and glycol temperature is -5/-1degC, so if glycol is frozen, it will be in plate heat exchanger.
In the same cooling system, there is 15 air cooler, working fine.
Anyway, they said that according to pictures, it must be destroyed by frozen medium inside the cooler, and believe it or not, that warranty can not be accepted, and that we are free to order new cooler...
Please see pictures enclosed, and please tell me that I am not crazy....
Rio