GFX3 Installation Manual
Contents
1. sensor has failed TREE Flashing The outdoor temperature sensor has failed Humidifier Turns On and Off Repeatedly Check that input voltage is between 18 and 30 volts AC and not intermittent Check that humidistat is NOT mounted 1 on supply duct 2 downstream of humidifier 3 closer to humidifier than 12 inches Make sure that Outdoor Sensor wiring is not close to line voltage wires Humidifier Runs Continuously If humidifier operates while HVAC system is off check that power to humidifier is switched with HVAC operation If humidifier operates every time HVAC System runs compare humidity to set point If humidity is lower than set point humidistat will call for operation Humidifier Does Not Run Check wiring to from GFX control Verify 18 30 volts Use TEST MODE Humidifier Runs When Air Conditioning Is On If this is undesirable change wiring to be powered only in heating periods Humidity not high enough Fault with Humidifier Check humidifier water supply electrical connections HVAC operating time too short Check humidifier trouble shooting Humidifier undersized Review humidity load and humidifier capacity 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 Limited Warranty This humidistat is warranted to the consumer against2. ES NO MORE THAN ONE PER LEAD CONSTANT 24 VOLTS 24 VOLT HUMIDIFIER SOLENOID VALVE OR DRUM MOTOR 200 FEET me NOTE Separate sensor leads from line voltage wires by at least 4 inches SUPPLIED CONSTANT 24 VOLTS YELLOW 120 VOLTS SWITCHED W FURNACE OPERATION Testing the System Re assemble system and check all connections Restore power to the HVAC system Start HVAC System by raising thermostat setting Check to see that GFX3 display is on Set to TEST MODE by pressing Drop and thermo together for 5 seconds The relay will close and the will flash for 2 minutes or press a key to set to OFF MODE 6 Set to OFF mode to verify humidifier operation ceases 7 The GFX3 will stay in OFF Mode unless set to Manual or Automatic mode See Operation oakWND Operating Modes Press any button to light the display Press the DROP button to select the Operating Mode Off Manual or Auto OFF Mode The Humidifier is turned off MANUAL Mode WA 5 The GFX3 will work to maintain the single up ae humidity selected You can set your desired humidity level by pressing UP or DOWN J ZO The humidifier will turn ON or OFF according DOWN gt to your manual setting The humidifier will operate when the measured relative Outdoor Suggested humidity falls more than 1 below the set point until Temperature Setting the measur
3. INSTALLATION AND OPERATING INSTRUCTIONS AA Mitaa AA A Thank you for F choosing the GeneralAire Digital Humidistat GFX3 Humidistat Fresh Indoor Air Quality 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 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 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 Qualified Technician 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 Over humidification 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 in
4. defects in materials and workmanship for a period of one year from the date of installation Defective parts will be repaired without charge except for removal reinstallation and transportation costs To obtain repair service under this limited warranty the consumer must send the defective part to the manufacturer There are no express warranties covering this humidistat other than set forth above The implied warranties of merchantability and fitness for a particular purpose are limited in duration to one year The manufacturer assumes no liability in connection with the installation or use of this product except as stated in this limited warranty The manufacturer will in no event be liable for incidental or consequential damages Any questions pertaining to this limited warranty should be addressed to the manufacturer USA The manufacturer has elected not to make available the informal dispute settlement mechanism which is specified in the Magnuson Moss Warranty Act Technical Support General Filters Inc 43800 Grand River Novi MI 48375 www GeneralAire com Engineering GeneralFilters com Tel 248 476 5100 Canadian General Filters Ltd 400 Midwest Road Toronto ON M1P3A9 Canada www CGFProducts com Sales cgfproducts com com Tel 416 757 3691 FORM GFX3 11 Rev C 9803 100 002
5. ed relative humidity is 1 above the set 20 F 29C 15 point When the humidifier is operating the will 10 F 23 C 20 display Humidity may have to be lowered when O F 18 C 25 weather is colder or if condensation is suspected The 10 F 12 C 30 settings table to the right or a similar table may be used 20 F 7 C 35 to compensate for cold outside temperatures 30 F 1 C 40 AUTO Mode 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 The humidifier will switch ON OFF according to the calculated auto humidity index set point When the humidifier is operating the will display Lower Index settings are for older homes with less insulation and poor vapor barriers Higher Index settings are for newer homes with complete vapor barriers triple pane windows and high R value insulation 1 2 Older than 1950 no vapor barrier little insulation 3 4 Built 1950 1965 no vapor barrier R6 insulation 5 6 Built 1965 1975 craft vapor barrier R11 insulation 7 8 Built 1980 1990 craft vapor barrier R19 double pane wi
6. ndows 9 10 Built after 1990 poly vapor barrier R38 insulation foam exterior cladding triple pane windows If condensation is seen or suspected reduce index by 2 until condensation stops The level bars indicate the humidity index one bar for two index points AUTO Mode Target Humidity Humidity Outdoor Temperature F Index 20 10 tt pe t i l a y s y a t a y a l 3 8 Bn s z3 j j 3 383 ipa o e a e a a a 4 J oj uj g wj a a 3 a e 5 2 s o 3 o 50 e a e a e a e o o p a a a a a o a OFFSET Mode To change the calibration of the GFX3 an offset may be entered to the Humidity Indoor Temperature or Outdoor Temperature displays Press both UP and DOWN buttons together to enter OFFSET mode The word OFFSET and RH will display Press UP or DOWN to change the humidistat s Humidity calibra tion Press both UP and DOWN buttons together again to change the Indoor Temperature offset Press both UP and DOWN buttons together again to change the Outdoor Temperature offset Display a Temperature Press the THERMOMETER button to move between displaying indoor and outdoor temperature Tree will be displayed when showing outdoor tempera ture House will be displayed when showing indoor temperature To change between F and C units press the F C button Trouble Shooting HOUSE Flashing The indoor temperature
7. sulated 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 specifications for this product and the contents of the user manual are subject to change without notice Specifications Voltage 18 30 VAC 60Hz Manual Mode Resolution Temp or RH 1 or 1 Switching Load 1 amp max 30 volt Control Range 10 75 RH Relay Close Setting 1 RH Outdoor Sensor max 200 ft 61m Accuracy RH 77 F 25 C 10 90 3 RH Relay Open Setting 1 RH Auto Mode Accuracy Drift Per Year 0 5 RH Control Range 10 60 RH Accuracy Indoor Temp 2 F 1 C Outdoor Temp 10 F 23 C min Accuracy Outdoor Temp 2 F 1 C Outdoor Sensor Location z 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 GFX3 Locations amp AS Et sgh Wall Hole Duct Installation Installation Wall base has vents _ 48 4 SF EI If wires are run inside wall cut rectangular opening _ If wires are run inside duct cut rectangular opening Secure the base with the two plastic anchors and screws Secure the base with the two sheet metal screws Wiring WIRING OUTDOOR SENSOR WIRING TO 24V HUMIDIFIER SPLIC
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