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ENGLISH

HDFS3P1 - INSTALLATION INFORMATION FOR HUMIDITY SENSOR AND FAN CONTROL

www.eaton.com

www.eaton.com/wiringdevices 

EIS-0268-EFS (REV. A)

HDFS3P1

Humidity Sensor and Fan Control

WARNING

SPECIFICATIONS

Power..................................................................................................120VAC, 60Hz

Maximum fan load.......................................................................................3 Amps

Fan Time Delay.............................................................................................20 mins

Humidity range...................................................................................45%-80% RH

The HDFS3P1 is a 3 Amp, single pole Humidity Sensor and Fan Control 

Switch. This sensor helps conserve energy and automates the fan in which 

it is connected, which provides energy savings and reduces the possibility 

of mold and mildew. When the humidity sensor detects excess humidity in 

a room, it automatically turns on the ventilation fan. The sensor continues 

to monitor the air and automatically turns the fan off when the humidity 

level drops below its preset level.

Turn the POWER OFF at the circuit breaker before installing the sensor

Read and understand these instructions before installing. This device is 

intended for installation in accordance with the National Electrical Code 

as well as local regulations. It is recommended that a qualified electrician 

performs this installation. Make sure to turn off the circuit breaker or 

fuse(s) and make sure power is off before wiring the device.

DIRECTIONS

The HDFS3P1 features three adjustable humidity levels for customizable 

control to suit the specific ventilation needs of the room. These humidity 

levels are as follows:

1.

 High Humidity (80% RH)

2. 

Medium Humidity (65% RH) 

*(default)

3. 

Low Humidity (45% RH)

OPERATING INSTRUCTIONS

Fan Mode: Manual ON, Auto OFF

a. The manual button is used to turn the fan off after a 20 minute time delay.

b. If the fan is in the ON state, the manual button is used to turn off the 

    fan before the time delay expires, the fan will immediately turn off and 

    the humidity sensor will stop working.

c. Turn ON the manual button and the humidity sensor will be operational 

    after 20 minutes.

Humidity Mode: Auto ON, Auto OFF

a. The Fan will turn ON automatically when preset humidity level is  

    reached and automatically turn OFF when the humidity level drops below 

    the preset.

b. If the humidity level is higher than preset for 3 minutes, then the fan will 

    continue to run for 5 minutes.

c. When the manual button is used to turn OFF the fan before the 20

    minutes is reached, the fan will turn OFF immediately and the humidity 

    sensor will stop detecting. Only when the manual button is set to ON 

    then the humidity sensor will resume operation after 20 minutes. Expect 

    a 3 minute delay for the automatic sensor to turn on the fan.

•  Function: Humidity Level

   

     1. High Humidity

   

     2. Medium Humidity 

*default

   

     3. Low Humidity

STEP 1 : Enter Programming Mode

•  Press and hold the fan button for eight seconds until the bi-color LED 

     light comes on. The sensor is now in programming mode.

STEP 2 : Choose the Setting

•  Press the fan button the same number of times for that function 

PROGRAMMING

Use copper wires only. NEUTRAL WIRE IS REQUIRED.

WIRING DIRECTIONS

1. Connect RED wire from sensor to the FAN wire.

2. Connect BLACK wire from sensor to the HOT wire.

3. Connect WHITE wire from sensor to the NEUTRAL wire.

4. Connect GREEN wire from sensor to the GROUND wire.

Neutral 

Neutre 

Neutro

Black 

Noir 

Negro

Red 

Rouge 

Rojo

Line 

Ligne 

Línea

Load 

Charge 

Fase

Green 

Vert 

Verde

Ground 

Mise à la terre 

Conexión a 

tierra

Neutral 

Neutre 

Neutro

White 

Blanc 

Blanco

Fan 

Ventilateur 

Ventilador

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