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TABLE 1—THERMOSTAT MODELS AND APPLICATIONS.
Model Switching Anticipator See
Number Application System Fan Range Comments Fig.
T834C1137 For use in standard HEAT-OFF- ON-AUTO 0.18 to 1.0A TRADELINE; Beige. 3
T834C1541 For use in gas- or SUPER TRADELINE; 4
oil-fired, or central Beige.
T834C2267 For use in gas- or SUPER TRADELINE; 5
oil-fired, single-stage Premier White.
heat pump or central (Jumper included.)
T834C2309 For use in standard 0.3 to 1.2A TRADELINE; Beige. 3
In electric heat applications without fan sequencers, jumper terminals 1 and 2 to control the fan from the thermostat during
3. Installer must be a trained, experienced service tech-
4. After installation is complete, check out product op-
eration as provided in these Instructions.
Disconnect power supply before beginning instal-
lation to prevent electrical shock or equipment
Contact your local waste management authority for in-
structions regarding recycling and the proper disposal of this
control, or of an old control containing mercury in a sealed
If you have questions, call Honeywell Inc. at 1-800-468-
J. H. • Rev. 2-93 • • ©Honeywell Inc. 1993 • Form Number 69-0434—5
T834C Thermostats control 24 to 30 Vac single-stage heating-cooling systems. See Table 1 for specific models and
applications. An spdt mercury switch makes R to W on a temperature fall for heating, and R to Y on a temperature rise for cooling.
See Fig. 1.
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
WHEN INSTALLING THIS PRODUCT...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous condi-
2. Check the ratings given in the Instructions and on the
product to make sure the product is suitable for your applica-
Fig. 1—Internal view of T834C.