Changes

Service was provided by "My Guy HVAC" They were on time and professional. The only issue was the technician struggled a little with the unconventional connections in the shop system. The were working on a flat service fee so no extra cost was incurred because of his confusion.

Service was provided by "My Guy HVAC" They were on time and professional. The only issue was the technician struggled a little with the unconventional connections in the shop system. The were working on a flat service fee so no extra cost was incurred because of his confusion.

Above notes are accurate except there is no thermostat at all and the unit doesn't' supply outside air. The unit on the roof is wired for cooling only. Connect the small (22ga?) red wires to the left of pp1-1 to trigger the contacter for the compressor on the roof. There is no control board for the air handler and the blower is wired directly to the switches. The switches on the bottom of the air handler are each switching one leg of the 240v circuit for the blower. This should be changed to a DPST switch at a minimum. A disconnect would be better. The blower circuit is taken from 2 legs of the 3 phase circuit used for the compressor. This is a potential safety issue. As well as confusing as one would expect a separate breaker for the blower. The service tech indicated that the unit is low on refrigerant, estimated 2-3 lbs. due to the other issues, I chose not to have the the refrigerant topped off at this time.The unit uses R-22 refrigerant.

Above notes are accurate except there is no thermostat at all and the unit doesn't' supply outside air. The unit on the roof is wired for cooling only. Connect the small (22ga?) red wires to the left of pp1-1 to trigger the contacter for the compressor on the roof. There is no control board for the air handler and the blower is wired directly to the switches. The switches on the bottom of the air handler are each switching one leg of the 240v circuit for the blower. This should be changed to a DPST switch at a minimum. A disconnect would be better. The blower circuit is taken from 2 legs of the 3 phase circuit used for the compressor. This is a potential safety issue. As well as confusing as one would expect a separate breaker for the blower. The service tech indicated that the unit is low on refrigerant, estimated 2-3 lbs. Due to the other issues, I chose not to have the the refrigerant topped off at this time.The unit uses R-22 refrigerant.

My recommendation is that we leave the unit alone unless or until there is a 24v control added to the blower, a separate circuit with a disconnect is run to the blower and a filter setup is arranged.

My recommendation is that we leave the unit alone unless or until there is a 24v control added to the blower, a separate circuit with a disconnect is run to the blower and a filter setup is arranged.