AVS-500 user manual
Contents
1. ium Ventilation in OFF mode a Tum the IDLE SPEED SET knob fully counter clockwise b Turn the BUILDING TEMPERATURE SET knob fully clockwise The fan should be running at IDLE c Slowly adjust the IDLE SPEED SET knob until a satisfactory IDLE minimum ventilation is reached A voltmeter is helpful for determining the idle voltage If you are unsure please consult your fan dealer for the minimum idle voltage for your fan motor d Tum the BUILDING TEMPERATURE SET knob to the desired temperature Hysteresis The AVS500 has a 1 F hysteresis This means the fan will turn off 1 F below the point it tumed on For example if TEMP SET is 75 F the fan will turn on at 75 F off at 74 F This prevents the fan from flickering on and off at the TEMP SET TOHIB Rev 2 2007 02 16 AVS500 User Manual Operation Example 1 Operation in Automatic Shut Off Mode Parameter Setting TEMP SET 80 F DIFF oF Automatic Shut Off SF IDLE 20 of maximum ventilation Description of Operation 1 The fan will be off when the temperature is below 75 F 2 When the temperature increases to 75 F the fan operates at full speed for three seconds then IDLE minimum ventilation of 20 The fan will continue to idle between 75 F and 80 F 3 Between 80 F and 86 F DIFF the fan speed will change proportionally with the room temperature If the room temperature increases fan speed increases If the2. D DIFF Fan speed will increase with an increase in temperature Automatic Shut Off Fan will run at IDLE DE Fan will run at minumum ventilation iS MAXIMUM VENTILATION DIFF FAN SPEED 0 20 40 60 80 100 Figure 4 OFF Mode Tiose Rev 2 2001 0207 AVS500 User Manual Care and Maintenance Moisture will not cause a problem with the control if proper care is taken during installation The control s enclosure is made of fire retardant plastic and sealed with a rubber gasket The sensor entry is sealed with a liquid tight cable connector Use caution when washing the room with a high pressure washer DO NOT direct a high pressure washer at the control To clean the surface of the control wipe it with a damp cloth Maintenance After the first two weeks of operation remove the cover from the unit and check inside for moisture Be sure to tum off the power to the control before removing the cover If moisture is present wipe the control out with a dry cloth Check the cable entry points and rubber gasket for proper sealing Ifthe cable connectors are not sealing apply RTV or Silicon II sealant around the cable NOTE Some silicone sealants release acetic acid while curing Let the sealant cure completely one to three days before closing the control Failure to do this may damage the control and void the warranty Check the control again after two weeks
3. become familiar with the proper safety and operating procedures Follow the Getting Started section below for step by step instructions on installing your AVS500 Getting Started Fill out the information below to help configure your control and verify that you do not exceed the current ratings listed in the Electrical Ratings section A B AxB iiti Maximum Current Draw Per Fan Number of Fans Total Current Draw Make Model Voltage Rating TOB Rev 2 2007 02 16 AVS500 User Manual Installat Warning The AVS500 should be installed by a qualified electrician Tum off the power before installing or CAUTION Srvicing Mounting the Control Mount the control with the knockouts at the bottom of the enclosure Failure to do this will void the warranty Use the knockouts at the bottom of the enclosure for mounting cable connectors e DO NOT make additional holes in the enclosure this will void the warranty e Run all wires into the enclosure through the knockouts and connect all ground wires to the ground plate ing the Control Tum off the power before doing any wiring Set the voltage switch to the correct position for the line voltage used 115 or 230V AC Take off the cover when removing electrical knockouts to prevent damaging the control Read the Electrical Ratings section before installing the AVS500 control Connect t
4. to verify that itis sealing properly Inspect the control once a year for moisture Proper care and maintenance will extend the life of the control Warning This control is designed and manufactured to provide reliable performance but is not guaranteed to be 100 free of defects Even reliable products may experience occasional failures and this possibility should be recognized by the user If this product is used in a life support ventilation system where failure could result in loss or injury the user should provide adequate back up ventilation supplementary natural ventilation or an independent failure alarm system The user s lack of such precautions acknowledges their willingness to accept the risk of such loss or injury Tiose Rev 2 2001 0201 AVS500 User Manual LIMITED WARRANTY SCHAEFER FAN CO warrants this unit the AVS500 subject to the following terms and conditions This warranty is valid only to the original purchaser for a period of two years from the date of manufacturing The manufacturing date is stated in the first eight digits of the serial number in the form year month day SCHAEFER FAN CO hereby warrants that should this product prove defective by reason of improper workmanship SCHAEFER FAN CO will repair the unit effecting all necessary parts replacements without charge for either parts or labor CONDITIONS Installation must be made in accordance with our enclosed installation instruc
5. AVS500 User Manual Features o o o Non metallic non corrosive water resistant enclosure IS a e Microprocessor based a 3 N e Variable speed SCHAEFER e Adjustable Temperature Differential of 1 to 20 F AUTOMATIC VARIABLE SPEED Adjustable IDLE Speed 0 to 99 of line voltage TAN CONTROL Extendable temperature probe ey omne Three second full power turn on to minimize fan motor ice up P e RFI fiter rr Automatic shut off with an adjustable differential of 0 t016 F ee Two year limited warranty Electrical Ratings mages ee VOLTAGE 115 230V AC 60Hz CURRENT 10 Full Load Amps PHASES Single Phase Warning Variable speed fan motors draw more current at reduced speeds than maximum speed Fan motor specifications show current draw at maximum speed Current over 10 Amps will cause overheating and eventual failure of the AVS500 control Please check current requirements for the fan motor by either measuring current draw at all speeds or consulting the dealer for information on that fan For controlling shaded pole permanent CAUTION sci capacitor or universal motors only Introduction Congratulations on the purchase of your new AVS500 environment control The AVS500 is a microprocessor based control that connects to a variable speed fan to efficiently control temperature This manual will help you get the most from your AVS500 Take a few minutes to read this manual and
6. ectrical tape to insulate the wires 9 Run the extended sensor cable to the desired location h Join the other end of the extension wire to the end of the sensor cable containing the probe Apply heat shrink or electrical tape to insulate the wires NOTE If the unit operates erratically with the extended temperature sensor try running the sensor on a different path or shortening it Ensure the sensor cable is not run beside other electrical wires or near electrical equipment Four Zone Averaging The AVS500 can monitor the temperature in four different zones The control takes an average of the four temperatures and operates according to the average temperature To take advantage of this option you must connect four temperature sensors to the unit See Figure 2 for wiring information ZONE 1 ZONE 2 ZONE 3 ZONE 4 Be e Figure 2 Four Zone Averaging Adjusting Settings Building Temperature Set TEMP SET The TEMP SET is the desired temperature and can be adjusted from 32 F to 100 F It is also the reference for the Automatic Shut Off and Temperature Differential DIFF settings To adjust the setting turn the BUILDING TEMPERATURE SET knob to the desired temperature Idle Speed IDLE The IDLE speed is the speed of the fan in IDLE mode To adjust the setting tum the IDLE SPEED SET knob until the fan runs at the desired idle speed IDLE provides minimum ventilation at temperatures below the TEMP SET point Automa
7. he wires as shown Figure 1 a Breen BLACK LINE a Figuret Wiring Diagram Temperature Probe Connect the probe to the fast on tabs Gently pull on the probe to extend it out of the enclosure Tighten the compression nut on the strain relief Extending the Sensor You can extend the temperature sensor to suit your particular application The maximum length of sensor depends on the level of electrical noise With proper installation sensor lengths of up to 500 feet are possible To extend the sensor use two wire 18 AWG jacketed cable for a proper seal at the cable entry hole We recommend Belden 9408 Alpha 5052 or an equivalent Do not run the sensor cable next to other power cables or inside conduit When crossing other cables cross at 90 For best results solder all connections and apply heat shrink to insulate the wires TORB Rev 2 2007 02 16 AVS500 User Manual Follow these steps to extend the sensor a Tum the power off to the control b Remove the four screws from the cover and lift the cover off Disconnect the sensor connectors from the fast on tabs d Cut the sensor cable approximately six inches from the connectors and pull the probe end of the sensor cable out of the box e Insert the extension wire into the box Join the connector end of the sensor cable to one end of the extension wire and re connect the cable to the fast on tabs Apply heat shrink or el
8. room temperature decreases fan speed decreases 4 The fan will run at maximum speed when the temperature is at or above 86 F maximum ventilation 5 When the room temperature drops the reverse will happen AVS500 VARIABLE AUTOMATIC SHUT OFF MODE OUTPUT E PARAMETER DESCRIPTIONS TEMP SET MUMM Target VENTILATION temperature DIFF Fan speed will increase with an 6 i increase in A temperature p Om Automatic Shut Off j Fan will run at Y IDLE i V7 DLE we p a Fan wil runat sya minumum ventilation OFF QO FAN SPEED 0 20 40 60 80 100 Tgure 3 Automatic SACO Mode Tiose Rev 2 2007 02 16 AVS500 User Manual Example 2 Operation in OFF Mode Parameter Setting TEMP SET 80 F DIFF oF Automatic Shut Off OFF IDLE 20 of maximum ventilation Description of Operation 1 Below 80 F the fan will operate at IDLE 20 of maximum ventilation 2 Between 80 F and 86 F DIFF the fan speed will change proportionally with the room temperature If the room temperature increases fan speed increases If the room temperature decreases fan speed decreases 3 The fan will run at maximum speed when the temperature is at or above 86 F maximum ventilation 4 When the room temperature drops the reverse happens AVS500 OFF MODE VARIABLE SPEED OUTPUT yee PARAMETER DESCRIPTIONS TEMP SET Target temperature
9. tic Shut Off The Automatic Shut Off is the number of degrees Fahrenheit below the TEMP SET that the fan will switch between OFF and IDLE The setting can be adjusted from 0 F to 16 F or set to OFF To adjust the setting tum the AUTOMATIC SHUT OFF SET knob to the desired number of degrees from the TEMP SET Tiose Rev 2 2007 02 16 AVS500 User Manual Temperature Differential DIFF The DIFF is the number of degrees Fahrenheit above the TEMP SET that the fan reaches maximum speed The DIFF is factory set at 6 F This setting is satisfactory for most requirements To adjust the setting use a small screwdriver to adjust the trimmer Refer to Figure 1 for trimmer location Adjusting Minimum Ventilation in Automatic Shut Off Mode a Tum the IDLE SPEED SET knob fully counter clockwise then back tum clockwise b Turn the BUILDING TEMPERATURE SET knob fully clockwise The fan should not be running c Slowly turn the BUILDING TEMPERATURE SET knob counter clockwise When the fan runs full speed release the BUILDING TEMPERATURE SET knob The fan will run at maximum speed for approximately three seconds then at IDLE d Slowly adjust the IDLE SPEED SET knob until a satisfactory IDLE minimum ventilation is reached A voltmeter is helpful for determining the IDLE voltage If you are unsure please consult your fan dealer for the minimum idle voltage for your fan motor e Adjust the BUILDING TEMPERATURE SET knob to the desired temperature
10. tions The unit must not have been previously altered modified or repaired by anyone other than SCHAEFER FAN CO 3 The unit must not have been subject to accident misuse abuse or operated or installed contrary to the instructions contained in this manual The opinion of SCHAEFER FAN CO with respect to these matters shall be final 4 The person requesting the services provided hereunder must be the original purchaser of the unit and furnish proof of purchase upon request 5 This warranty is applicable only to the SCHAEFER FAN CO AVS500 Temperature Control 6 All transportation charges on units submitted for warranty repair are the responsibility of the purchaser 7 Retum unit together with original proof of purchase to your dealer for warranty service EXCEPT TO THE EXTENT PROHIBITED BY APPLICABLE LAW NO OTHER WARRANTIES WHETHER EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE SHALL APPLY TO THIS UNIT ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED SCHAEFER FAN CO SHALL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES SUSTAINED IN CONNECTION WITH THE SAID UNIT SCHAEFER FAN CO NEITHER ASSUMES NOR AUTHORIZES ANY REPRESENTATIVES OR OTHER PERSONS TO ASSUME FOR IT ANY OBLIGATION OR LIABILITY OTHER THAN SUCH AS IS EXPRESSLY SET FORTH HEREIN SCHAEFER FAN CO reserves the right to improve or alter the AVS500 without notice SCHAEFER Ventilation Equipment Tiose Rev 2 2001 0201
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