Installation Instructions for White-Rodgers 1F51N-619 Evaporative Cooler Thermostat

Quick guide from the manual

This document provides installation and operation instructions for the White-Rodgers 1F51N-619 Low Voltage Evaporative Cooler Thermostat. Important: Always disconnect electrical power at the main fuse or circuit breaker box before beginning installation to prevent electrical shock or equipment damage. This thermostat is designed to operate with the White-Rodgers 8A18Z-2 Evaporative Cooler Control.

Installation

Follow these steps to install the thermostat:

1. Route wires: Pull wires from the cooling equipment through the hole in the wall, leaving approximately 6 inches of cable protruding.
2. Connect wires: Pull wires through the opening near the center of the subbase and connect them beneath the terminal screws as indicated in the wiring diagram.
3. Seal opening: Push excess wiring back into the wall and plug the hole with fire-resistant material (e.g., fiberglass insulation) to prevent drafts from affecting the thermostat.
4. Mount subbase: Fasten the subbase loosely to the wall using two mounting screws. Use a level against the bottom of the subbase to adjust until level, then tighten the screws.
5. Attach thermostat: Attach the thermostat base to the subbase, ensuring all captive screws are tightened snugly, as these serve as electrical connections.
6. Finish: Snap the cover onto the thermostat base and set the temperature lever to the desired setting (1 to 5 scale).

Operation

The thermostat features a subbase switch for system control and a fan switch for speed selection.

• System Switch: Allows selection of VENT, COOL, or OFF positions.
• Fan Switch: Allows selection of LOW or HIGH fan speed.
• Temperature Scale: Numbers 1 to 5, where lower numbers represent cooler temperatures and higher numbers represent warmer temperatures.

The system function depends on the combination of switch positions. For example, in COOLING MODE, both the pump relay and fan timer relay are energized by the thermostat, and the fan starts on low or high speed depending on the fan switch setting.

Safety and Precautions

• Electrical Safety: Do not use on circuits exceeding 30 volts. Higher voltage will damage the control and cause shock or fire hazards.
• Wiring: Do not short out terminals on the gas valve or primary control to test. Incorrect wiring will burn out the heat anticipator.
• Mercury Warning: This product does not contain mercury, but it may replace a unit that does. If replacing a mercury-containing unit, do not discard it in household trash; follow proper disposal procedures as outlined at www.white-rodgers.com.