A couple of things that I don't like about Dectron, although it is a good unit is:
1) In the ones I have services/set-up the compressor is located in the air circuit which is not a good thing should the refrigerant burn and exit the lines; and that location adds to compressor noise.
2)They seem to be set-up more towards dehumidification as a primary function and pool water heating as a secondary function. True that the microprocessor can be set to supply pool water heat as the primary but it just doesn't supply heat in the same quanity as other makes I have worked on.
3) The set up of the microprocessor head can be quite complicated requiring totaling the types of applications for that particular job. Should a new tech not know the accessories or system specs, it's can be time consuming to trace out or figure out the system.
4) They use a damper motor and a sensor to open/close the dehumidification by-pass damper for freeze control. That system and trouble shooting it can be complicated.
5) The room air sensor is actually located inside the return air of the unit and not in the microprocessor head itself. On a long run with heat gain/loss I have had to compensate.
6) I have had some problems with the air flow sensor, which is also located in the RA, in giving off false restricted air flow alarms so, usually, I reduce the air flow amount below 40% to help eliminate the alarms.
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