My house has older thermostats and two hydro-air fan coil units for both heat (Oil fired H.W.) and A/C (condensers outside). FCU has 4 wires coming out and being used.
I'm assuming Red is common, White is heat, Green is fan, Brown is A/C. Here's the current wiring schematic.
![New Thermostat & Hydro Air Fan Control Relay wiring Help New Thermostat & Hydro Air Fan Control Relay wiring Help](/talk/proxy.php?image=http%3A%2F%2Fi21.photobucket.com%2Falbums%2Fb294%2Fsierradmax%2FExistingWiringSchematic_zps03a9b642.jpg&hash=25d4ec628202f2fddeab9e57aa1db823)
I've decided to join the 21st century with touch screen, programmable thermostats. Specifically, the Honeywell WIFI 9000. Now, when the wife asks me what's it like outside today, I can tell her to look at the thermostat. Here's what I bought.
http://www.homedepot.com/p/t/203926327#.Uo9m4uIgM7c
I've also purchased new Hydro-Air Fan Control's. I always had to play with the aquastat on the FCU's and could never get them tuned properly. I would always have false calls for heat and often had the fan coils blowing cold air at the end of each cycle. I purchased these guys to help solve the problem.
http://s3.pexsupply.com/product_files/Taco - HAFC201-4 - Install Instructions.pdf
I think I have the wiring figured out. Any thoughts?
![New Thermostat & Hydro Air Fan Control Relay wiring Help New Thermostat & Hydro Air Fan Control Relay wiring Help](/talk/proxy.php?image=http%3A%2F%2Fi21.photobucket.com%2Falbums%2Fb294%2Fsierradmax%2FProposedWiringSchematic_zps0cf76b08.jpg&hash=29937a1f8b2f578df52c843febac602a)
I'm assuming Red is common, White is heat, Green is fan, Brown is A/C. Here's the current wiring schematic.
![New Thermostat & Hydro Air Fan Control Relay wiring Help New Thermostat & Hydro Air Fan Control Relay wiring Help](/talk/proxy.php?image=http%3A%2F%2Fi21.photobucket.com%2Falbums%2Fb294%2Fsierradmax%2FExistingWiringSchematic_zps03a9b642.jpg&hash=25d4ec628202f2fddeab9e57aa1db823)
I've decided to join the 21st century with touch screen, programmable thermostats. Specifically, the Honeywell WIFI 9000. Now, when the wife asks me what's it like outside today, I can tell her to look at the thermostat. Here's what I bought.
http://www.homedepot.com/p/t/203926327#.Uo9m4uIgM7c
I've also purchased new Hydro-Air Fan Control's. I always had to play with the aquastat on the FCU's and could never get them tuned properly. I would always have false calls for heat and often had the fan coils blowing cold air at the end of each cycle. I purchased these guys to help solve the problem.
http://s3.pexsupply.com/product_files/Taco - HAFC201-4 - Install Instructions.pdf
I think I have the wiring figured out. Any thoughts?
![New Thermostat & Hydro Air Fan Control Relay wiring Help New Thermostat & Hydro Air Fan Control Relay wiring Help](/talk/proxy.php?image=http%3A%2F%2Fi21.photobucket.com%2Falbums%2Fb294%2Fsierradmax%2FProposedWiringSchematic_zps0cf76b08.jpg&hash=29937a1f8b2f578df52c843febac602a)