Q539 Subbases—provide system and fan switching and cool-
ing anticipation (unless otherwise specified) for T87F heat-
ing, cooling and heating-cooling thermostats.
TG587F1008 Thermostat Guard Key Lock Cover with window.
TG587F1016 Thermostat Guard Key Lock cover without
3. Installer must be a trained experienced service techni-
4. After installation is complete, check out product opera-
tion as provided in these instructions.
04456B Two terminal heat only T87 Wallplate.
37421AE-T87 Taupe Wallplate with positive Off.
37421K-T87 Taupe Wallplate without positive Off.
37421R-T87 White Wallplate.
Locate the thermostat about 5 ft (1.5m) above the floor in an
area with good air circulation at average temperature.
98170A Designer Beige Adapter Kit.
Do not install the thermostat where it can be affected by:
— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
98172 Cover Ring for T87 Designer Beige models.
99933 Cover Ring for Taupe T87 models.
14855-00029 Cover Ring for Gold T87 models.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
37421A-T87 Gold Wallplate without positive Off.
37421B-T87 Gold Wallplate with positive Off.
21886A Easy-to-Use™ Clear Ring. Durable plastic ring
snaps on Easy-to-See models.
— unheated (uncooled) areas such as an outside wall behind
202687A Premier White® Adapter Kit includes 6 in. cover
assembly and adapter ring to mount on outlet box or cover
marks from old thermostats.
This thermostat is a precision instrument and was carefully
adjusted at the factory. Handle it carefully.
32005439-001 Taupe Adapter Kit includes 6 in. cover assem-
bly and adapter ring to mount on outlet box or cover marks
from old thermostat.
Mount Wallplate or Subbase
Use a spirit level to accurately level the wallplate or
subbase as shown in Fig. 1. Inaccurate leveling may
cause the thermostat to deviate from setpoint.
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.
When using the T87F with a Q539 Subbase, follow
the mounting and wiring instructions for the subbase.
Contact your local waste management authority for
instructions regarding recycling and the proper
disposal of an old control.
Use the cover ring (if desired), adapter plate (if needed),
wallplate or subbase, T87F and screws as shown in Fig. 2 and
Before mounting the thermostat, see Setting and
Checkout section, Heat Anticipator Adjustment sub-
1. Place the cover ring on the wall at the desired location
with the cable entrance holes to the left.
Can cause electrical shock or equipment damage.
NOTE: If an outlet box is used, place the cable entrance
holes toward the bottom. The side showing MADE IN
U.S.A. must be against the wall.
Disconnect power before beginning installation.
Pull the thermostat cable through the entrance hole of
the cover ring and the entrance hole of the wallplate or
subbase and adapter plate (if used).
Equipment Damage Hazard.
Improper installation can burn out thermostat heat
3. Fasten the cover ring, adapter plate (if used), and the
wallplate or subbase.
On systems using a low voltage gas valve, do not
apply a jumper across the valve coil terminals.
4. Level the wallplate as shown in Fig. 1 and tighten the
After wiring the subbase or wallplate, plug the hole to
prevent interior wall drafts from affecting the thermostat.
When Installing this Product. . .
Read these instructions carefully. Failure to follow them
could cause a hazardous condition.
6. Align the thermostat over the wallplate and tighten the
three captive mounting screws.
Check the ratings given in the instructions and on the
product to make sure the product is suitable for your