HONEYWELL T4054A (01) PDF Document

The HONEYWELL T4054A Industrial/Agricultural Line Voltage Thermostat has the following features:

• Suitable for mounting in any position.

• Spst or spdt snap-acting switch.

• Fast response, hydraulic temperature sensitive element.

• Compact size.

• Wide temperature range.

• Temperature setting knob and setting scale on front of thermostat.

• May be used in heating-cooling systems with external changeover switch (T6054A model).

The switch is actuated by a hydraulic temperature sensing element on change in temperature. The switching action varies by model:

• T4054A (spst switching): Makes R to B connection on temperature fall. This model is for heating applications.

• T4054B (spst switching): Makes R to W connection on temperature rise. This model is for cooling applications.

• T6054A (spdt switching): Makes R to B on temperature fall or R to W on temperature rise. This model provides control in ventilation, heating, cooling, or heating-cooling systems.

• Maximum Temperature Device May Be Exposed To: 125 F [52 C].

• Differential: 3/5 F [1.9 C] fixed.

• Scale Range (T4054A, B): +30 to +110 F [-1 C to +38 C] (scale marked in 2 F [1 C] increments).

• Scale Range (T6054A): -30 F to +100 F [-34 C to +38 C] (scale marked in 2 F [1 C] increments).

• Mounting: Mounts on wall with 3 screws.

• Color: Gray.

• Dimensions (T4054A, B): 7-5/8 x 2-5/8 x 2 in. [193.7 x 66.7 x 50.8 mm].

• Dimensions (T6054A): 7-1/4 x 2-5/8 x 2 in. [184.2 x 66.7 x 50.8 mm].

1. Read the instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.

2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.

3. The installer must be a trained, experienced service technician.

4. After installation is complete, check out product operation as provided in the instructions.

CAUTION: Disconnect power supply to prevent electrical shock and equipment damage.

Select a location about 5 ft [1.5 m] above the floor in an area with good air circulation at average temperature.

Do not mount the thermostat where it may 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) areas behind the thermostat.

The thermostat may be mounted in any position. To mount the thermostat, use the following procedure:

1. Remove the thermostat cover by unscrewing the single screw on the face of the control.

2. Remove the knockout from the case.

3. Mount the control at the selected location with three screws.

4. Run conduit between the thermostat, the power source, and the unit being controlled.

5. Run wiring through the knock out hole and make connections. NOTE: Wiring should not interfere with the adjusting knob.

After completing installation and wiring, check the controller operation as follows:

1. Turn on the power.

2. Turn the adjustment knob to move the temperature dial across the indicator and back again. If the wiring is correct, the controlled equipment will switch on and off as the temperature dial indicates the approximate space temperature.

EXAMPLE: When wired for heating (R to B), turning the dial counterclockwise to a higher setting simulates a space temperature drop and the heating equipment should come on. When the control is wired for a cooling or ventilating application (R to W), turning the dial clockwise to a lower setting simulates a rise in temperature and the cooling or ventilating equipment should come on.

If the controlled equipment does not start and stop as the thermostat dial is turned, disconnect the power supply and check the wiring and terminal connections.

If the controlled equipment operates opposite to the sequence desired, shut off the power and check for reversed leads on the switch.