Honeywell Round T8775A 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.
INSTALLATION
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.
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.
WALL ANCHORS (2) --
WALL PLATE _
I
I INCI/SCREW (2) M_ ,>
z_WHEN USING WALL ANCHORS, DRILL 3,¸¸16IN HOLES
FOR DRYWALL¸ 7/32 IN HOLES FOR PLASTER¸
Fig. 1. Mounting watlplate to wall.
© U.S Registered Trademark ° Patents Pending
© 2004 Honeywell International inc.
All Rights Reserved _ 69-1677ES--1

Honeywell Round T8775A Specifications

General

Brand	Honeywell
Model	Round T8775A
Category	Thermostat
Language	English

Summary

INSTALLATION

Location

Guidance on selecting an optimal installation location for the thermostat.

Mounting Wallplate to Wall

Instructions for physically mounting the wallplate to the wall using provided hardware.

Mercury Disposal Notice

Important instructions for the proper disposal of old controls containing mercury.

Wiring

General Wiring Requirements

Essential guidelines for wiring the T8775A,C thermostats, including wire gauge and safety.

Typical Hookups

Diagrams illustrating various wiring configurations for different heating and cooling systems.

CUSTOMIZE THERMOSTAT

Setting Fuel Switch (T8775C only)

How to set the fuel switch for different system types (gas/oil, electric, heat pump).

Fahrenheit/Celsius Indication

Instructions for setting the temperature display to Fahrenheit or Celsius using DIP switch 3.

Set Heat Cycle Rate

How to adjust the heat cycle rate using DIP switches 1 and 2.

Mounting Thermostat to Wallplate

Procedure for attaching the thermostat unit to the already mounted wallplate.

OPERATION

System and Fan Switch Settings (T8775C only)

How to manually set the system (Heat/Cool/Off) and fan (On/Auto) modes.

Checkout Procedure

Steps to verify thermostat functionality for heating, cooling, and fan operations.

Cooling Operation Precautions

Important warnings about operating cooling at low outdoor temperatures to prevent damage.