Robertshaw 9401 User Manual

Application
The Robertshaw 9401 is a single-stage thermostat designed to control
24 VAC gas or electric heating and cooling systems or single-stage heat
pump. The 9401 requires the use of a common wire.
Features
• Summer and winter setpoints
•Large back lit display
• Adjustable temperature differential: .5°F to 3.0°F (0.5°C to 1.5°C)
• Compressor short cycle protection
•Accuracy within ±1°
• Zone system compatible as a master thermostat
• Permanent memory retention
• Fahrenheit/Celsius display option
• Adjustable from 45°F to 90°F (7°C - 32°C)
• Quick wire terminal block
• Automatic heating shutdown if temperature exceeds 94°F (34°C)
1
DIGITAL
NON-PROGRAMMABLE
THERMOSTAT
9401
ELECTRIC
E
GAS
G
OIL
O
®
NeW
1 Heat / 1 Cool
User's Manual
Quick Start
Installation
110-1041

Robertshaw 9401 Specifications

General

Type	Non-Programmable
Stages	1 Heat/1 Cool
Display	Digital
Power	Hardwired
Voltage	24V
Temperature Range	45°F to 90°F

Summary

Installation Guide

Replacing Existing Thermostat

Instructions for removing an old thermostat and preparing for the new unit installation.

Installing Model 9401 Thermostat

Step-by-step process for mounting and wiring the new Robertshaw 9401 thermostat.

Wiring Diagrams

Illustrates various wiring configurations for different heating and cooling system types.

Thermostat Testing

Thermostat Customization

System Settings

Controls for selecting heating, cooling, or off modes for the system.

Fan Settings

Options for continuous fan operation or automatic fan control.

Temperature Settings

Adjusting default heating and cooling temperature setpoints.

Temperature Differential

Adjusting the temperature difference that triggers system operation.

Fahrenheit/Celsius and Differential Adjustment

How to change display units and temperature differential settings.

Backlit Display

Activating and deactivating the thermostat's backlight for nighttime use.

Reset Function

Procedure to reset the thermostat to its default settings.

Troubleshooting Guide

Two Year Limited Warranty