White-Rodgers 1E30-373 Low Voltage Thermostat User Manual

Important Information

The White-Rodgers 1E30-373 is a low voltage room thermostat designed for various types of heating plants. It features an adjustable heater that can be calibrated to the primary control's current rating. This document provides essential guidance on installation, wiring, and maintenance.

Selecting the Location

Proper placement is critical for accurate temperature control. Follow these guidelines:

• Install the thermostat approximately 5 feet above the floor.
• Mount on an interior partition wall; avoid outside walls.
• Do not install near radiators, warm air registers, or in the direct path of heat.
• Avoid locations exposed to direct light from lamps, fireplaces, or other heat sources.
• Ensure the location is not in a room that is significantly warmer or cooler than the rest of the home.

Routing Wires

1. Before drilling, use a small guide hole to check for obstructions.
2. Probe for obstructions in the partition.
3. Drill a 1/2" hole through the wall at the selected location.
4. If there is no basement, drop the cable from the ceiling and snag it at the thermostat location.
5. Attach the thermostat cable to the cord and pull it through the hole in the wall so that 6 inches of cable protrudes.

Mounting the Thermostat

1. Pull the thermostat wires through the large hole in the center of the mounting plate.
2. Fasten the wires beneath the two terminal screws on the bottom side of the plate.
3. Push excess wire into the wall or switch box and plug the hole to prevent drafts from affecting the thermostat.
4. Level the mounting plate and mark the holes for mounting screws.
5. Attach the plate loosely to the wall with two screws, adjust for level, and tighten.
6. Remove the cover from the thermostat base by pulling outward.
7. Remove and discard the shipping protection for the switch.
8. Place the thermostat base onto the mounting plate and tighten all three captive screws.
9. Install the thermostat cover and secure it with the four provided allen screws using the included wrench to prevent tampering.

Wiring

All wiring must comply with local and national electrical codes and ordinances. Because of the many possible uses for these room thermostats, no specific wiring diagrams are provided. Use the wiring diagram that is packed with the primary control or the one supplied by the manufacturer of the heating equipment.

Heat-Anticipator Adjustment

The thermostat is equipped with an adjustable heater. Set the heater indicator to match the current rating of the primary control (adjustable from .15 to 1.0 Amps).

• Cycles too long: Set the adjustable heater to a slightly lower dial setting (1/2 division).
• Cycles too short: Set the adjustable heater to a slightly higher dial setting (1/2 division).

Calibration Adjustment

These thermostats are carefully adjusted at the factory and should not require re-calibration. If re-calibration is necessary:

1. Move the temperature adjustment lever to a setting about 5° above room temperature.
2. Remove the thermostat cover.
3. Slip a standard 7/32" wrench onto the hex nut beneath the bimetal.
4. Hold the temperature adjustment lever stationary and turn the hex nut clockwise until the mercury shifts to the right end of the tube.
5. Move the temperature adjustment lever to the lowest setting.
6. Replace the thermostat cover and wait 10 minutes for the bimetal to stabilize.
7. Move the temperature adjustment lever to correspond to the actual room temperature.
8. Remove the cover, slip the 7/32" wrench onto the hex nut, and hold the lever stationary.
9. Turn the hex nut counterclockwise until the mercury just barely shifts to the left end of the tube.
10. Replace the cover and set the thermostat to the desired temperature.

Technical Specifications

• Switch Rating: 1.0A at 30Vac max.
• Heating Anticipator: .15 to 1.0A.
• Temperature Range: 35°F to 75°F.