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INSTALLATION INSTRUCTIONS
69- 0579- 4
T87F Zone Thermostat and
137421N,P Wallplates; T87F Zone
Thermostat and Q539A,B Subbases
APPLICATION
The T87F Thermostat provides 24 Vac single-stage
temperature control of Honeywell Zone Control Panels.
The panel operates the heating or cooling systems and
zone dampers in response to the T87F Zone
Thermostats. The T87F is used with the 137421N or P
Wallplate (provided) or Q539A or B Subbase (ordered
separately), depending on application. See Table 1 for
thermostat/wallplate and subbase applications and
specifications.
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of an old control.
INSTALLATION
When Installing This Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Disconnect the power supply to prevent electrical
shock or equipment damage.
3. Check the rating given in the instructions and on
the product to make sure the product is suitable for
your application.
4. Installer must be a trained, experienced service
technician.
5. After completing installation, use these instructions
to check out the product operation.
Table 1. Thermostat/Wallplate and Subbase Applications and Specifications.
Thermostat
/Wallplate
or Subbase Application
Switching
CommentsSystem Fan
T87F3707/
137421N
T87F3715/
137421P
To control zones other than zone
1 using MM-2 or MM-3 Zone
Control Panels. To control zone
damper actuators in independent
heating-only systems.
None None Wallplate included with
thermostat. Terminals are
marked: W, R, Y.
T87F3715/
Q539A1436
T87F3707/
Q539A1428
To control any zone on TZ-3,
EZ-2, EZ-4, EMM-3 or EMM-3U
or zone one on MM-2 or MM-3
Zone Control Panels.
COOL-OFF-
HEAT
ON-AUTO Q539A ordered
separately. Terminals
marked: R,W,Y,G,O,B.
T87F3715/
Q539B1039
T87F3707/
Q539B1021
To control zone damper
actuators in independent zones
in heating-cooling systems.
HEAT__COOL None Q539B ordered
separately. Terminals
marked: 4,5,6.
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