This is an easy diy replacement of your old thermostat. When using the t87f with a q539 subbase follow the mounting and wiring instructions included with when installing this product the subbase. Page 1 mercury notice thermostat control deviation. The heat ac is a bryant unit with a ultra zone zone conrol pannel on the side. Do i assume that my black wire would be red for installation purposes. Use plumb line or spirit level to accurately level the wallplate as in fig. My hvac system has 3 zones. Update amazon now offers a free smart home consultation the trouble i m having is how to connect the nest gen2 thermostat to. I did the install on 2 last night and now my heating system seems to have no idea whats going on. Nest s compatibility checker on their site calls for wire names.

View profile view forum posts. A thermostat that knows when you want your home warmer or cooler can save you energy. Summary of contents for honeywell t87f. Honeywell t87f to nest conversion problems. There are 2 wires underneath my thermostat but no indication of labeling. I have seen that it is compatible but everything i read about 2 wires says that they are red and white my concern is that my 2 wires are white and black. Upstairs it s blasting to 79 degrees when it s set to 65 and downstairs it won t warm up 62 and set. One with heat only simple single red wire to rh and white to w. If you are looking for honeywell t87f thermostat nest and honeywell thermostat ba. Page 2 r8184 protectorelay oil.

A thermostat that knows when you want your home warmer or cooler can save you energy. Installation and setting 2. The heat ac is a bryant unit with a ultra zone zone conrol pannel on the side. Two for heat and cool using honeywell t87f thermostats. Page 2 r8184 protectorelay oil. Posted by 6 years ago. Has anyone swapped a t87f the round mercury thermostats to nest. Honeywell t87f to nest conversion problems. House was built in 1916. Honeywell comparison gives you the chance to look at how two of the leading manufacturers are letting you turn your home into a smart home.

Inaccurate leveling may cause thermostat control deviation. When using the t87f with a q539 subbase follow this control contains mercury in a sealed tube. Upstairs it s blasting to 79 degrees when it s set to 65 and downstairs it won t warm up 62 and set. Converting old honeywell t87f to nest. Do i assume that my black wire would be red for installation purposes. Page 2 disconnect power supply before connecting jumper operating control wiring to. I did the install on 2 last night and now my heating system seems to have no idea whats going on. One with heat only simple single red wire to rh and white to w. Page 2 r8184 protectorelay oil. I have seen that it is compatible but everything i read about 2 wires says that they are red and white my concern is that my 2 wires are white and black.

Has anyone swapped a t87f the round mercury thermostats to nest. Posted by 6 years ago. My hvac system has 3 zones. Inaccurate leveling may cause thermostat control deviation. Summary of contents for honeywell t87f. When using the t87f with a q539 subbase follow this control contains mercury in a sealed tube. Honeywell t87 to nest wiring issue i am looking to upgrade to a nest from a honeywell t87. Honeywell t87f to nest conversion problems. Hi first time post. Do not the mounting and wiring instructions included with place control in the trash at the end of its useful life.