jmd445
Senior Member
- Location
- Hamilton Twp., NJ
I don't know if this is the right forum but........ is there a standard for wiring a 3 phase rooftop HVAC unit for rotation? For example I'm working with a Carrier 48TJE three phase unit. Do I wire it Phase A,B,C to L1, L2, L3 CW rotation or do I wire it C,B,A to L1,L2,L3 for CCW rotation. I can't find any thing in the mfg's literature and I've asked several electricians / conractors and no one has an answer.
The only solution they offer is to check the blower motor and see what direction it is turning (should the blower be 3-phase). Note: reciprocating compressor will operate either way, scroll compressors will self destruct of operated in reverse.
The only solution they offer is to check the blower motor and see what direction it is turning (should the blower be 3-phase). Note: reciprocating compressor will operate either way, scroll compressors will self destruct of operated in reverse.