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APPLICATION
The T834B,C,J Heating-Cooling Thermostats provide 24
to 30 Vac control in heating-cooling systems. An spdt
mercury switch makes R to W on a temperature fall for
heating, and R to Y on a temperature rise for cooling.
Integral switches control H
system operation and AUTO-ON or ON-AUTO fan
operation (fan switch on T834C,J only). In heat pump and
some electric heat systems, fan operation is controlled by
the thermostat during heating. Check the electric heat
manufacturer specifications for fan control requirements. If
fan control from the thermostat is necessary in an electric
heat application, use the T834C Thermostat model (dual
fuel) with optional fan control. Jumper terminals 1 and 2 to
control fan operation from the thermostat during heating.
TERM INALS 1 AN D 2 FOR AUTOM ATIC FAN CONTROL IN HEATING
AN D COOLIN G.
A
IN GAS-AND OIL-FIRED A PPLICATIONS, JUMPER TERM INALS 1
AN D Y FOR AU TOM ATIC FAN CONTROL IN COOLING.
Fig. 1. Jumpering terminals for fan control.
®U.S. Registered Trademark
Copyright © 1999 Honeywell Inc.
Heating-Cooling Thermostats
A
-OFF-COOL or COOL-OFF
e
t
All Rights Reserved
T834B; T834C; T834J
®
RECYCLING NOTICE
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 the trash.
Contact your local waste management authority
for instructions regarding recycling and the proper
disposal of this control, or of an old control
containing mercury in a sealed tube.
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.
A
CAUTION
Damage to Heating/Cooling System Possible.
Be careful when handling wires during
installation.
Disconnect power at furnace or at main breaker/
fuse before starting installation.
Location
Locate the thermostat about 5 ft (1.5m) above the floor on
an inside wall in an area with good air circulation at
M8675
average temperature.
Do not mount the thermostat where it may be affected by:
—
drafts or dead spots behind doors or in corners.
—
hot or cold air from ducts.
—
radiant heat from the sun, fireplaces, or appliances.
Honeywell
INSTALLATION INSTRUCTIONS
69-0444-10
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Related Manuals for Honeywell T834J
Summary of Contents for Honeywell T834J
- Page 1 Do not mount the thermostat where it may be affected by: — drafts or dead spots behind doors or in corners. — hot or cold air from ducts. — radiant heat from the sun, fireplaces, or appliances. ®U.S. Registered Trademark 69-0444-10 Copyright © 1999 Honeywell Inc. All Rights Reserved...
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Page 2: Wiring And Mounting
The T834 may be m ounted directly on a wall or vertical bottom mounting hole. D o not tighten. outlet box. U se Honeywell part no. 193121A M ounting Level the thermostat exactly using a spirit level or Plate Assembly (ordered separately) to mount on horizon... - Page 3 T834B; T834C; T834J HEATING-COOLING THERMOSTATS IN ELECTRIC HEAT APPLICATION, JUMPER 1 AN D 2 FOR A UTO FAN IN HEATING. M2035A Fig. 4. Internal schem atic and typical hookup for T834C dual fuel model in a gas- or oil-fired, or central electric heat system.
- Page 4 T834B; T834C; T834J HEATING-COOLING THERMOSTATS Fig. 8. Internal schem atic and typical hookup for T834C with terminal for defrost relay in heat pump system . 69-0444— 10...
- Page 5 Fig. 10. Internal sch em atic and typical hookup for T834B in standard heating-cooling system with no fan switching. Fig. 11. Internal schem atic and typical hookup for T834B in heating-cooling sy ste m with zon e valve. Fig. 12. Internal schem atic and typical hookup for T834J cooling only system . 69-0444— 10...
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Page 6: Settings And Adjustment
Disconnect the am m eter, reconnect the W wire, T834J and mount the therm ostat. Continue with system The T834J features SYSTEM and FAN switches for checkout. control of the cooling and fan system s. NOTE: The heat anticipator may require further adjust... - Page 7 T834B; T834C; T834J HEATING-COOLING THERMOSTATS Electric Systems (with auto fan in heat) Cooling Set adjustable anticipator to combined current draw of heating and fan relays. CAUTION Damage to C om pressor P ossible. Other Systems (without auto fan in heat)
- Page 8 T834B; T834C; T834J HEATING-COOLING THERMOSTATS RECALIBRATION These thermostats are calibrated at the factory and should M ove the setting lever to a low setting. Wait at not need recalibration. If the thermostat seems out of least five minutes for temperature to stabilize.