Honeywell CT87A Round Thermostat Instruction Manual
CT87A,B,J ROUND® THERMOSTAT
Wire the thermostat
6
1. Use the wiring cross-reference table below to match each old
thermostat wire with its corresponding terminal on the CT87 wallplate
or subbase. See Fig. 8 through 13 wiring diagrams.
Wiring Cross-reference
Connect to Connect to Connect to
Wire Label
R, RH, 4, V
Rc, R
CT87A
CT87B
CT87J
R
RH
R
Rc
W
W, W , H
W
Y
W
Y
1
Y, Y , M
Y
1
G, F
G
G
B
See Fig. 9
B*
O*
P
O
See Fig. 13
*Never attach wires to both the B and O terminals.
2. Strip the wire insulation as needed to fit the wires underneath the ter-
minal screws (Fig. 7).
Fig. 7. Fitting wires under the terminal screws.
FOR STRAIGHT
CONNECTION—
STRIP 5/16 in. [8 mm]
FOR WRAPAROUND
CONNECTION—
STRIP 7/16 in. [11 mm]
BARRIER
M1279
3. Loosen the terminal screws and slip each wire beneath its matching
terminal.
4. Securely tighten the terminal screws.
5. Push any excess wire back into the wall.
69-0274-6
6
firealarmresources.com
| General | Details |
|---|---|
| Name | Honeywell CT87A Round Thermostat Instruction Manual |
| Make | Honeywell |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.29 MB |

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