Honeywell T812C1000 Installation Instructions

Honeywell Thermostats Installation Instructions - T812C1000.
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Copyright © 2004 Honeywell International Inc.  •  

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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

0.647747s