Honeywell T812A1010 - Premier 1 Heat Stage Thermostat User Manual

® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc. • • All Rights Reserved
INSTALLATION INSTRUCTIONS
69-1606ESF-3
T812, TS812 Thermostats
APPLICATION
The T812 and TS812 Thermostats are low voltage,
controls for heat only, cool only or heating and cooling
systems. See Table 1.
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.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of the old thermostat.
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. 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.
CAUTION
Electrical Shock Hazard.
Can cause personal injury or equipment
damage.
Disconnect power supply before beginning
installation.
Location
Locate the thermostat about 5 ft (1.5m) above the floor in
an area with good air circulation at average temperature.
Do not mount 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) area such as outside wall behind
the thermostat.
Table 1. Model Descriptions.
Model Voltage System Anticipator
T812A 24 Vac Heat only Adjustable
.18A to 1.2A @
30 Vac
T812B 12 Vdc Heat only .18A to 1.2A @
12 Vdc
T812C 24 Vac Heat and
Cool
Adjustable
.18A to 1.2A @
30 Vac
T812D 24 Vac Cool only Fixed 24 Vac to
30 Vac
TS812A 750 mV Heat only .1A @ .75 Vdc

Honeywell T812A1010 - Premier 1 Heat Stage Thermostat Specifications

General

Model Number	T812A1010
Power Source	24V AC
Stages	1 Heat
Backlight	No
Temperature Range	40°F to 90°F
Compatibility	Single-stage heating systems
Voltage	24 VAC
Mounting	Wall

Summary

APPLICATION

INSTALLATION INSTRUCTIONS

Location

Guides where to place the thermostat for optimal performance and avoid interference.

Wiring and Mounting

T812 and TS812 Models Without Subbase

Instructions for wiring and mounting thermostats that do not use a subbase.

T812 Models With Subbase

Steps for wiring and mounting thermostats that include a subbase.

SETTING AND CHECKOUT

Temperature Setting

How to adjust the thermostat's temperature setpoint for desired comfort.

Heat Anticipator Setting (Select Models)

Adjusting the heat anticipator to match system current draw for accurate temperature control.

Cool Anticipator (Select Models)

Details on the fixed 24 Vac to 30 Vac anticipator for cooling models.

Checkout

Procedures for verifying the system operates as intended after installation.

Calibration

Information that the thermostat is factory calibrated and not field-adjustable.