GeneralAire GFX3 Installation And Operating Instructions

INSTALLATION AND
OPERATING INSTRUCTIONS
About the GFX3 Digital Humidistat
In Automatic Mode the GFX3 will adjust the humidity in your home based on the outdoor tempera-
ture, lowering the humidity in cold weather to reduce condensation. The GFX3 can operate in
Manual Mode to control humidity to a speci c 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. The GFX3 can be mounted
on an interior wall or on the return duct of the HVAC System.
Precautions
This Humidistat must be installed by a Quali ed Technician. Always turn o power to the HVAC system prior to Installing or Servicing the Humidi er or Humidistat. Improper
operation can result in over or under humidi cation. Over humidi cation can result in condensation, structural damage or mold. Condensation within a building's structure can
cause a loss of structural strength. Condensation can also enable mold and mildew growth resulting in personal injury and damage to building structure and contents. Older
and poorly insulated structures cannot withstand the same humidity levels as newer well insulated buildings. Read these instructions carefully. This humidistat requires a 24
volt, AC power supply. Improper voltage can cause malfunction or damage to the control. The technical speci cations for this product and the contents of the user manual are
subject to change without notice.
Speci cations
Voltage 18-30 VAC, 60Hz.
Switching Load 1 amp max. 30 volt
Outdoor Sensor max. 200 ft. 61m.
Auto Mode
Control Range
10%-60% RH.
Outdoor Temp. -10°F, -23°C min.
GFX3 Locations
Thank you for
choosing the GeneralAire
GFX3 Humidistat!
Manual Mode
Control Range 10%-75% RH
Accuracy -RH (77°F, 25°C) 10%-90% ±3%RH
Accuracy Drift Per Year ±0.5%RH
±2°F, ±1°C
Accuracy Indoor Temp.
±2°F, ±1°C
Accuracy Outdoor Temp
YES!
YES!
Wall
1" Hole.
Installation
Wall base has vents.
If wires are run inside wall,
cut rectangular opening.
Secure the base with the
two plastic anchors and
screws.
Resolution, Temp or RH 1° or 1%.
Relay Close Setting - 1%RH
Relay Open Setting +1%RH
YES!
YES!
Duct
Installation
Outdoor Sensor Location
YES ! NO!
North Wall South Wall
East Wall West Wall
Over Snow Line Below Snow
Inlet of Air Intake Deep in Intake
Less than 200' from More than 200'
humidistat. from humidistat.
1" Hole.
Duct base: no vents.
If wires are run inside duct,
cut rectangular opening.
Secure the base with the
two sheet metal screws.