Honeywell T834L1004 Installation Instructions - Page 3
Settings And Adjustments, Checkout - thermostat
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SETTINGS AND ADJUSTMENTS T834C HEATING AND COOLING THERMOSTAT Temperature Setting Push the temperature setting lever to the desired control point on the temperature scale. The same lever controls the temperature setting for either heating or cooling. System and Fan Switching The T834C has System and Fan switches to control the heating-cooling systems and fan. The System switch controls system operation: Heat: Operates only heating system. Off: Both heating and cooling systems are disconnected. Cool: Operates only cooling system. The Fan switch controls fan operation: Auto: For gas-or oil-fired systems; the fan operates in response to the thermostat in cooling and in response to the plenum fan control in heating. On: The fan runs continuously. To switch positions, use thumb and index finger to slide lever to desired position. Stop switch lever in detent directly over desired position. Stop switch lever in detent directly over desired function indicator mark for correct circuit operation. Heat Anticipator Setting IMPORTANT The T834C Thermostat has an adjustable heat anticipator and operates correctly only if the anticipator is adjusted to match the current draw of the primary control. Use this thermostat only on systems with current draw that falls within the range of the heat anticipator. Do not use this device on Powerpile® Systems (millivolt). Look for the current rating stamped on the nameplate of the primary control. Set the adjustable heat anticipator indicator to match the value shown on the nameplate. If the current rating is not available, proceed as follows to determine the rating: 1. Turn off the power. 2. Wire the thermostat, but do not mount it on the wall. 3. Connect the ammeter between the W wire and the W terminal on the thermostat (in series with the primary control). 4. Prepare the system for operation. 5. Turn on the power. 6. Turn the System switch to Heat. 7. Increase the thermostat setpoint, as necessary, to begin operating the system. 8. With the system operating through the ammeter, wait one minute, then read the ammeter. 9. Turn the System switch to Off and turn off the power. 10. Adjust the heat anticipator to match the ammeter reading. 11. Disconnect the ammeter, reconnect the W wire, and mount the thermostat. NOTE: For best performance, the heat anticipator may require further adjustment. To lengthen burneron time, move the indicator in the direction of the longer arrows but not more than one-half scale marking at one time. To shorten burner-on time, move the indicator in the opposite direction. CHECKOUT CAUTION Equipment Damage Hazard. Heat anticipator can be damaged. Do not check operation by shorting across system control terminals. IMPORTANT To assure accurate temperature control, do not touch or breathe on bimetal or thermometer. Heating With System switch set at Heat, and Fan switch set at Auto, move the temperature setting lever about 10°F (6°C) above room temperature: Gas or oil-fired systems: heating should start; fan should start after a short delay. Move the temperature setting lever about 10°F (6°C) below room temperature: Gas or oil-fired systems: heating should shut off and fan should shut off after a short delay. 3 69-1688