Honeywell CT87N Manual

Honeywell CT87N Owners Manual

Honeywell CT87N Subbase and base installation

  1. Pull wires through wire hole. Position coverplate on wall, level and mark hole positions.
  2. Drill holes (3/16” for drywall, 7/32” for plaster) and tap in supplied wall anchors.
  3. Pull wire through coverplate and subbase, position over anchors, then insert and tighten mounting screws. Check level if desired.
  4. Apply the large-print labels to the coverplate, matching the labels on the subbase.

Honeywell CT87N Subbase and base installation

Honeywell CT87N Wiring

  1. Match each labeled wire with same letter on terminal.
  2. Use a screwdriver to loosen screw terminals, insert bare wire into slots, then tighten screws.
  3. Push any excess wire back into the wall opening.

Honeywell CT87N Wiring

Labels don't match?
If labels do not match letters on thermostat, see table below.
Existing wires Connect to:
R • RH • 4 • V Terminal “R” [1]
Rc Terminal “Rc” [1]
O Terminal “O” [2]
B Terminal “B” [2]
G • F Terminal “G”
W • W1 • H Terminal “W”
Y • Y1 • M Terminal “Y”
C • X • B Do not use [3]

[1] If wires will be connected to both R and Rc terminals, remove metal jumper.
[2] Do not connect both O and B if you have a heat pump. Connect only the O wire. Wrap B wire with electrical tape and do not use.
[3] Do not use C, X or B. Wrap bare end of wire with electrical tape.
[4] If you have two wires, connect wires to R and W.

Honeywell CT87N Fan operation settings

Honeywell CT87N Fan operation settings

Move the switch to the proper setting for your system:
F: For gas or oil heating systems, leave the fan operation switch in this factory-set position (for systems that control the fan in a call for heat).
E: Change the switch to this setting for heat pump or electric heat systems. (This setting is for systems that allow the thermostat to control the fan in a call for heat, if a fan wire is connected to the G terminal.)

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Honeywell CT87N Manual