Honeywell T87F - Manual

CAUTION

1. Disconnect power supply to prevent electri-

cal shock or equipment damage.

2. To prevent interference with the thermostat

linkage, keep wire length to a minimum and
run wires as close as possible to the subbase.

3. Do not overtighten thermostat captive mount-

ing screws because damage to subbase threads
can result.

4. Do not short across coil terminals on relay.

This can burn out the thermostat heat antici-
pator.

IMPORTANT: An incorrectly leveled thermostat will

cause the temperature control to deviate from set
point.

LOCATION

Install the thermostat about 5 ft [1.5m] above the

floor in an area with good air circulation at average
temperature.

Do not install the thermostat where it may be affected

by:

— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall

behind the thermostat.

This thermostat is a precision instrument and was

carefully adjusted at the factory. Handle it carefully.

MOUNTING WALLPLATE OR SUBBASE (Fig. 2)

IMPORTANT:

1. Use a spirit level to accurately level the wallplate

or subbase as in Fig. 1. Inaccurate leveling may
cause thermostat control deviation.

2. When using the T87F with a Q539 Subbase, follow

the mounting and wiring instructions included with
the subbase.

1. Place the wallplate on the wall at the desired loca-

tion. Pull the thermostat cable through the entrance hole.

2. Fasten wallplate. Do not tighten the screws.
3. Level according to Fig. 1 then tighten screws.
4. After wiring wallplate, plug hole to prevent drafts

from affecting thermostat.

NOTE: To mount T87 Thermostat on an outlet box,

order 129044A Adapter Ring Assembly.

T87F

Universal Thermostat

Installation Instructions for the Trained Service Technician.

Application

The T87F Universal Thermostat provides tempera-

ture control for 24 to 30 Vac residential heating, cooling
or heating-cooling systems. For heating systems, the
T87F mounts on the wallplate provided. For cooling
only, or heating-cooling, order the 137421A (198170A
if textured designer model) Heating-Cooling Wallplate
with remote switching, or the Q539 Subbase, which
provides switching at the thermostat location.

The spdt switch makes one set of contacts on a tem-

perature fall to operate the heating system. The other set
of contacts make on a temperature rise to operate the
cooling system when the T87F is used to control cool-
ing.

Heat anticipation is adjustable, 0.1 to 1.2A.

Mercury Notice

This control contains mercury in a sealed tube. Do not

place control in the trash at the end of its useful life.

If this control is replacing a control that contains

mercury in a sealed tube, do not place your old control in
the trash.

Contact your local waste management authority for

instructions regarding recycling and the proper disposal
of this control, or of an old control containing mercury in
a sealed tube.

If you have questions, call Honeywell Inc. at 1-

800-468-1502.

Installation and Setting

WHEN INSTALLING THIS PRODUCT…

1. Read these instructions carefully. Failure to fol-

low them could cause a hazardous condition.

2. Check the ratings given in the instructions and on

the product to make sure the product is suitable for your
application.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

M3375

TRADELINE

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