Honeywell T834C Installation Instructions Manual
Heating-cooling triple fuel
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APPLICATION
The T834C, T8034C Heating-Cooling Triple Fuel Thermo-
stats, see Fig. 1, control 24 to 30 Vac single-stage heating-
cooling systems. The adjustable heat anticipator setting
range of 0.15A to 1.2A and the two jumpers included make
Model
Application
T834C
For use in gas or oil-fired,
heat pump or central
electric heat systems.
T8034C
a
In electric heat applications without fan sequencers, jumper terminals 1 and 2 to control the fan from the thermostat
during heating.
b
Two jumpers included.
T834C
FAN
SWITCH
®U.S. Registered Trademark
Copyright © 2002 Honeywell •
T834C,T8034C Heating-Cooling
Table 1. Thermostat Models and Specifications.
Mounting
vertically
a,b
horizontally
MOUNTING HOLE
(THERMOSTAT
TO WALL OR
OUTLET BOX)
MERCURY BULB
BIMETAL ELEMENT
BEHIND SCALE
ADJUSTABLE HEAT
ANTICIPATOR
INDICATOR
SYSTEM
SWITCH
MOUNTING HOLE
TEMPERATURE
SETTING LEVER
Fig. 1. Internal view of T834C and T8034C.
• All Rights Reserved
Triple Fuel Thermostats
the T834C and T8034C Thermostats applicable to almost
all single-stage heating applications. 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.
Heat
Anticipation
System
0.15A to 1.2A
HEAT-OFF-COOL
BIMETAL ELEMENT
BEHIND HEAT
MOUNTING HOLE
ANTICIPATOR
(THERMOSTAT
SCALE
TO WALL OR
OUTLET BOX)
ADJUSTABLE HEAT
ANTICIPATOR INDICATOR
X-XX UL
INSTALLATION INSTRUCTIONS
Switching
Fan
AUTO-ON
T8034C
MERCURY
SYSTEM
BULB
SWITCH
.18
.9
.2
.7
.5
.25
.35
.3
FAN
TEMPERATURE
SWITCH
SETTING LEVER
Figure
Reference
3, 4
MOUNTING
HOLE
M11340
69-1628
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Summary of Contents for Honeywell T834C
- Page 1 T834C,T8034C Heating-Cooling Triple Fuel Thermostats INSTALLATION INSTRUCTIONS APPLICATION the T834C and T8034C Thermostats applicable to almost all single-stage heating applications. See Table 1 for The T834C, T8034C Heating-Cooling Triple Fuel Thermo- specific models and applications. An spdt mercury switch stats, see Fig. 1, control 24 to 30 Vac single-stage heating- makes R to W on a temperature fall for heating, and R to Y cooling systems.
-
Page 2: Mercury Notice
All wiring must comply with local codes and ordinances. instructions regarding recycling and the proper disposal of this control. The T834C Thermostat can be mounted directly on a wall or on a vertical or horizontal outlet box. The 209649A (taupe) Mounting Plate Assembly allows mounting on a... - Page 3 IN GAS-AND OIL-FIRED APPLICATIONS, JUMPER TERMINALS 1 AND Y FOR AUTOMATIC FAN CONTROL IN COOLING. M11341 JUMPER W-Y FOR SINGLE STAGE HEAT PUMP APPLICATIONS. Fig. 2. Jumpering T834C and T8034C terminals for fan control. FAN SWITCH FAN RELAY AUTO (HOT)
-
Page 4: Setting And Adjustment
System and Fan Switching If the current rating is not available, proceed as follows to determine the rating: The T834C and T8034C feature SYSTEM and FAN Turn off the power. switches for control of the heating-cooling and fan systems. Wire the thermostat, but do not mount it on the wall. - Page 5 T834C,T8034C HEATING-COOLING TRIPLE FUEL THERMOSTATS Adjust the heat anticipator to match the reading on Cooling the ammeter. Disconnect the ammeter, reconnect the W wire, and CAUTION mount the thermostat. Continue with system checkout. Do not operate cooling if outdoor temperature is below 50°F (10°C).
- Page 6 T834C,T8034C HEATING-COOLING TRIPLE FUEL THERMOSTATS Move the setting lever to a lower setting. Wait at COIL SHOWN WITHOUT least five minutes for the temperature to stabilize. HEAT ANTICIPATOR Slowly move the setting lever until it reads the same as the thermometer.
- Page 7 T834C,T8034C HEATING-COOLING TRIPLE FUEL THERMOSTATS 69-1628...
- Page 8 T834C,T8034C HEATING-COOLING TRIPLE FUEL THERMOSTATS Automation and Control Solutions Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, Ontario M1V 4Z9 69-1628 69-1628 G.H. 3-02 Printed in U.S.A www.honeywell.com/yourhome...