I'm trying to figure out some problems at my company. I have a Trane Voyager 10 ton (circa 2008/2009) that has some problems.
First, whenever it rains during the summer and the A/C is on. The system proceeds to draw large amounts of outside air causing not only a positive pressure inside the building(doors won't close), but, also high amounts of humidity. Shoes squeak and papers are curling, general nasty wet feeling in the office.
I haven't looked at the unit yet so, I'm not sure if I have the relitel controls I keep seeing in the manuals provided. The system has two thermostats (th6220d1002 for upstairs) and (baystat050a for downstairs). Both wired the same way. I don't know if that matters. I've attached a few photos for determination.
The system also has a damper somewhere in the ducting to allow the heat/A/C to be directed to either up stairs or down stairs. It sounds like it is activated when either thermostat makes a call for heat/cool.
What I need help figured out right now is the humidity problem. What should I check for, functionality? Is there a known problem with these units that needs to be fixed? I saw something about Humidifier pad reminders on different thermostats, do these determine relative humidity and if it's old, cause such problems?
The system has an economizer, is there a sensor that may have gone bad? My boss says the system is over sized, I've done a load calculation and it's over sized by 2,000 BTU, no big deal if you ask me. Could the slight over sizing cause high humidity in the conditioned space?