GeneralAire GFX3 Installation Manual

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GENERAL FILTERS

INCORPORATED

Please Read And Save These Instructions

• Installation by anyone other than a qualified contractor voids the warranty.

• Product designed for residential installation only. Commercial installation voids warranty.

• Modification or alteration of product, parts, installation instructions or local safety codes voids warranty.

About the GFX3 Digital Humidistat

In Automatic Mode the GFX3 will adjust the humidity in your home based on the outdoor temperature, lowering the humidity

in cold weather to reduce condensation. The GFX3 can operate in Manual or Automatic Mode to control humidity to a

specific relative humidity. In most homes, Automatic operation is preferred to reduce condensation on windows and within

the structure. Manual mode is necessary where the outdoor temperature sensor cannot be installed. Manual mode may be

desirable where valuable artwork, instruments or woodwork demand constant humidity. The LCD Display is backlit and easy

to read. Operation and Installation are simple.



WARNING!

Always TURN OFF POWER TO THE HVAC SYSTEM prior to installing or servicing the humidifier or humidistat. Improper

operation can result in over or under humidification. This humidistat requires a 24 volt, AC power supply. Improper voltage

can cause malfunction or damage to the control. Do not run outdoor sensor wires on or near line voltage wires. The

technical specifications for this product and the contents of the user manual are subject to change without notice.

General Filters, Inc.

43800 Grand River Avenue

Novi, Michigan 48375

Toll Free: (866) 476-5101

www.generalaire.com

• Read our full warranty policy at the end of this document.

Breathe Healthier

Canadian General Filters, Ltd.

400 Midwest Rd.

Toronto, ON M1P3A9 Canada

Toll Free: (888) 216-9184

www.cgfproducts.com

GFX3 Humidistat

(GFI #7050)

Installation Manual

Page 1 About the GFX3 Digital Humidistat In Automatic Mode the GFX3 will adjust the humidity in your home based on the outdoor temperature, lowering the humidity in cold weather to reduce condensation. The GFX3 can operate in Manual or Automatic Mode to control humidity to a specific relative humidity.
Page 2 Model GFX3 Humidistat Installation Manual Specifications Max Operating Temperature: 99°F Automatic Mode • Control Range: 10% - 60% RH • Voltage: 20-30VAC, 60 Hz • Outdoor Temperature: -10°F / - 23°C Min. • Switching Load: 1 AMP Max. 30 Volt Manual Mode •...
Page 3 The GFX3 will automatically raise the humidity as the outdoor temperature increases. This provides the highest possible humidity. The GFX3 will automatically lower the humidity as temperatures drop. This minimizes the risk of condensation on cold surfaces like windows. The Auto Humidity Index Set Point may be changed from 0 (low) to 10 (high) by pressing “UP” or “DOWN”. The Humidity Index is based on the outdoor temperature and indoor humidity.
Page 4 8. Humidity Too High: • Wiring fault. Set GFX3 to “OFF” mode and check that operation ceases. Outdoor sensor is being kept warm. Check that sensor is not buried in snow, on south side of house being warmed by sun or is too far inside of air intake.