Honeywell T8775A, T8775C User Manual

Honeywell

T8775A,C

TheDigitalRoundTM

Non-ProgrammableThermostats

The T8775A,C Thermostats provide single-stage
temperature control for 24V systems. The
T8775A,C models include a thermostat, wallplate

(for wiring and mounting thermostat), mounting
screws, wall anchors, and a 4074 FAB resistor.

MERCURYNOTICE

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 an old
control containing mercury in a sealed
tube.

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

can be affected by:

-- drafts or dead spots behind doors and in
corners.

-- hot or cold air from ducts.

-- radiant heat from the sun or appliances.

-- concealed pipes and chimneys.

-- unheated (uncooled) areas such as an outside

wall behind the thermostat.

MountingWallplatetoWall

Mount the T8775A,C wallplate, with the screws
provided. See Fig. 1.

INSTALLATION

WALL ANCHORS (2) --

When Installingthis Product...

1. Read these instructions carefully. Failure to
follow them could damage the product or
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 ser-
vice technician.

4. After installation is complete, check out prod-

uct operation as provided in these instruc-

tions.

z_ CAUTION

Electrical Shock or Equipment Damage
Hazard.

Dan shock individuals or short
equipment circuitry.

Disconnect power supply before
installation.

© U.S Registered Trademark ° Patents Pending
© 2004 Honeywell International inc.

All Rights Reserved _ 69-1677ES--1

WALL PLATE _

I

I INCI/SCREW (2) M_ ,>

z_WHEN USING WALL ANCHORS, DRILL 3,¸¸16 IN HOLES

FOR DRYWALL¸ 7/32 IN HOLES FOR PLASTER¸

Fig. 1. Mounting watlplate to wall.

T8775A, C THE DIGITAL ROUND TM NON-PROGRAMMABLE THERMOSTATS

Wiring

IMPORTANT

Use 18-gauge wire to wire the T8775A, C
Thermostats

All wiring must comply with local electrical codes
and ordinances. Disconnect the power supply to

prevent electrical shock or equipment damage.

Refer to Fig. 2 through 6 for typical wiring hookups.

AND OVERLOAD PROTEC[ ON AS REQU RED

Fig. 2. Typical hookup of T8775A in a heat-only system.

APOWEf_SUP>LY Pf_OVDE DSCONNECTMEANS

Fig, 3. Typical hookup of T8775C in heat-only system

with fan.

r4_{_ s

Fig. 4. Typical hookup of T8775C in heat=cool system

with single transformer.

A A

A;,OWE_ SUPPLY P_OWOE O_SCONN_CT MZANS

ANO OW_L OAO ;'_OTECT_ON AS _EOU_EO

A _EMOW _ACTO_Y _NSTAHEOJUMPZ_ BETWEEN _ ANO _C

Fig. 5. Typical hookup of T8775C in heat=cool system

with two transformers.

A

6g-1677ES--1 2

Fig. 6. Typical hookup of T8775C in single-stage heat

pump system.