Honeywell CT87N Programmable Thermostat Owner’s Manual
- June 6, 2024
- Honeywell
Table of Contents
Honeywell CT87N Programmable Thermostat Owner’s Manual
Getting started
Check package contents:
- Thermostat
- Large print subbase switch labels
- Coverplate
- Wall anchors & screws (2 each)
- Wire labels
Thermostat is for 24 Vac heating and cooling systems.
This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Material—special handling may apply, See www.dtsc.ca.gov/hazardouswaste/perchlorate.
Before you begin, make sure you have:
- No. 2 Phillips & small pocket screwdrivers
- Hammer
- Level (optional)
- Pencil
- Drill and bit (3/16” for drywall, 7/32” for plaster)
Remove your old thermostat
CAUTION: TURN OFF POWER
Turn off power to system at the furnace, or at the fuse/circuit breaker
panel before you begin.
Remove cover and thermostat, but leave wallplate with wires attached.
Leave wallplate in place.
Is there a sealed tube containing mercury? If so, see mercury notice below.
MERCURY NOTICE
If your old thermostat contains mercury, contact your local waste management
authority for proper disposal instructions.
Label wires and remove old wallplate
Use a screwdriver to disconnect wires one by one. As you disconnect each wire, wrap it with the label matching the letter on your old thermostat.(Adhesive labels are supplied in your thermostat package.)
Remove the old wallplate only after all wires are labeled. Be careful not to let loose wires fall into the wall opening.
Wrap supplied labels securely around each wire.
Do not let wires fall into wall opening!
IGNORE WIRE COLORS: Use only
letter designations to identify wire types.
If your old thermostat has 7 or
more wires (not counting terminals C or C1), you may have purchased the wrong
replacement thermostat. Stop now and call 1-800-468- 1502 for advice.
Mount thermostat base
- Pull wires through base.
- Level base if desired.
- Mark positions of both screw holes.
Subbase and base installation
- Pull wires through wire hole. Position coverplate on wall, level and mark hole positions.
- Drill holes (3/16” for drywall, 7/32” for plaster) and tap in supplied wall anchors.
- Pull wire through coverplate and subbase, position over anchors, then insert and tighten mounting screws. Check level if desired.
- Apply the large-print labels to the coverplate, matching the labels on the subbase.
Wiring
- Match each labeled wire with same letter on terminal.
- Use a screwdriver to loosen screw terminals, insert bare wire into slots, then tighten screws.
- Push any excess wire back into the wall opening.
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]
0| 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]
- If wires will be connected to both R and Rc terminals, remove metal jumper.
- 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.
- Do not use C, X or B. Wrap bare end of wire with electrical tape.
- If you have two wires, connect wires to R and W.
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.)
Cycle rate settings
Move the cycle rate switches to the proper setting for your system (see table
below).
Heating System
|
Switch 1
|
Switch 2
---|---|---
Steam or gravity| On| On
High efficiency warm air (90% plus efficiency), hot water, or heat pump| Off|
On
Gas or oil warm air (factory setting)| Off| Off
Electric warm air| On| Off
Thermostat mounting
- Align the slots on the base with tabs on the thermostat, then push gently until the thermostat snaps into place.
- Restore electrical power at the heating/cooling system, or at the fuse/circuit-breaker panel.
Operation
System switch
- Cool: Controls the cooling system.
- Heat: Controls the heating system.
- Off: All systems are off.
Fan switch
- On: Fan runs continuously.
- Auto: Fan runs only when heating or cooling system is on.
CAUTION: EQUIPMENT DAMAGE HAZARD
Do not operate cooling system when outdoor temperature is below 50°F.
1-year limited warranty
Honeywell warrants this product, excluding battery, to be free from defects in
the workmanship or materials, under normal use and service, for a period of
one (1) years from the date of purchase by the consumer. If at any time during
the warranty period the product is determined to be defective or malfunctions,
Honeywell shall repair or replace it (at Honeywell’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the
place from which you purchased it; or
(ii) call Honeywell Customer Care at
1-800-468-1502. Customer Care will make
the determination whether the product should be returned to the following
address: Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden
Valley, MN 55422, or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs. This warranty
shall not apply if it is shown by Honeywell that the defect or malfunction was
caused by damage which occurred while the product was in the possession of a
consumer.
Honeywell’s sole responsibility shall be to repair or replace
the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR
ANY LOSS OR DAMAGE OF ANY
KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM
ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED,
OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do
not allow the exclusion or limitation of incidental or consequential damages,
so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT.
THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE
ONE-YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on
how long an implied warranty lasts, so the above limitation may not apply to
you.
This warranty gives you specific legal rights, and you may have other rights
which vary from state to state.
If you have any questions concerning this warranty, please write Honeywell
Customer Relations, 1985 Douglas Dr., Golden Valley, MN 55422 or call
1-800-468-1502.
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