DX units in winter
DX units in winter
(OP)
IM new to this site, not HVAC experienced and expected to pick it up. I have 20-30 split DX units with R-22 refrigerant doing computer room year round cooling. I understand they have problems with the units in the winter. Is there anything I can do to prepare? What kinds of problems can I expect? I don't believe there are any crankcase heaters in any units, if that would help.





RE: DX units in winter
Crankcase heaters would be one. Head pressure control would also be essential. This is done with either condenser fan cycling, or a variable speed controller that slows the fan as head pressure drops. The safest bet would be to ask the manufacturer what you need to do to fit the units for the lowest ambient temperature that they will see.
---KenRad
RE: DX units in winter
RE: DX units in winter
Whos make units are these?
How many fans are you controlling on each unit?
RE: DX units in winter