PN 475573 Vari-Green Control Indoor Air Quality–Temp .

PN 475573Vari-Green ControlIndoor Air Quality–Temp/HumidityInstallation, Operation and Maintenance ManualPlease read and save these instructions for future reference. Read carefully before attempting to assemble,install, operate or maintain the product described. Protect yourself and others by observing all safetyinformation. Failure to comply with instructions could result in personal injury and/or property damage!Temperature and Humidity ControllerThe Temperature and Humidity Controller isspecifically designed to control a Vari-Green fanmotor. The Temperature and Humidity Controllerwill sense the temperature and humidity in thespace and will automatically adjust the speed ofa supply or exhaust fan to adjust the ventilationrate accordingly. The temperature measurementwill be compared to a field adjustable temperaturesetpoint, processed through a Proportional/Integral/Derivative (PID) control algorithm to produce a 2to 10 VDC fan motor control output. The humiditymeasurement will be compared to a field adjustablehumidity setpoint, processed through a PID controlalgorithm to produce a 2 to 10 VDC fan motorcontrol output. If the unit is in temperature onlymode the temperature algorithm’s output shall beused to provide the fan motor control output. Whenthe unit is in humidity-only mode the humidityalgorithm’s output shall be used to provide thefan motor control output. When the unit is intemperature and humidity mode the algorithm withthe greatest output shall be used to provide the fanmotor control output.When all active algorithms are satisfied, the outputvoltage shall be set to its lowest value, 2 VDC. Ifthe temperature is 1 F below the temperatureGeneral Safety InformationOnly qualified personnel should install this product.Personnel should have a clear understanding ofthese instructions and should be aware of generalsafety precautions. Improper installation can resultin electric shock, possible injury due to coming incontact with moving parts, as well as other potentialhazards. Other considerations may be requiredif high winds or seismic activity are present. Ifmore information is needed, contact a licensedprofessional engineer before moving forward.setpoint intemperature controland the humidityis 3% below thehumidity setpoint inhumidity control orboth in temperatureand humidity control,the voltage outputmay be set to zero(optional cutoutmode). The unitwill resume normalfan operation ifthe temperaturechanges by 1 F orthe humidity changes by 5%.Ventilating based on the temperature and humiditymeasurements assures that the space will not beover or under ventilated while using the Vari-Greenmotor technology to operate quietly and efficiently.The Temperature and Humidity Controller hasadjustments for setpoint, minimum and maximumfan speed. The fan speed and temperature orhumidity level are available as an analog output tobe read by a buildingDANGERAlways disconnect, lock and tag power source beforeinstalling or servicing. Failure to disconnect powersource can result in fire, shock or serious injury.CAUTIONWhen servicing the fan, motor may be hot enoughto cause pain or injury. Allow motor to cool beforeservicing.CAUTIONPrecaution should be taken in explosiveatmospheres.1

Electrical Safety InformationFollow all local electrical and safety codes, as wellas the National Electrical Code (NEC) and theNational Fire Protection Agency (NFPA). Whereapplicable, follow the Canadian Electric Code.1. The rotation of the wheel is critical. It must befree to rotate without striking or rubbing anystationary objects.2. Motor must be securely and adequatelygrounded.3. Do not spin fan wheel faster than maximumcataloged fan RPM. Adjustment to fan speedsignificantly affects motor load. If fan RPM ischanged, motor current should be checkedto make sure it is not exceeding the motornameplate amps.4. Do not allow the power cable to kink or comein contact with oil, grease, hot surfaces,or chemicals. Replace cord immediately ifdamaged.5. Verify that the power source is compatible withthe equipment.6. Never open access doors to a duct while the fanis running.ReceivingUpon receiving the product check to make sure allitems are accounted for by referencing the bill oflading to ensure all items were received. Inspecteach crate for shipping damage before acceptingdelivery. Notify the carrier if any damage is noticed.The carrier will make notification on the deliveryreceipt acknowledging any damage to the product.All damage should be noted on all the copies of thebill of lading which is countersigned by the deliveringcarrier. A Carrier Inspection Report should be filledout by the carrier upon arrival and reported to theTraffic Department. If damaged upon arrival, filea claim with carrier. Any physical damage to theunit after acceptance is not the responsibility ofGreenheck Fan Corporation.UnpackingVerify that all required parts and the correct quantityof each item have been received. If any items aremissing, report shortages to your local representativeto arrange for obtaining missing parts. Sometimes itis not possible that all items for the unit be shippedtogether due to availability of transportation and truckspace. Confirmation of shipment(s) must be limited toonly items on the bill of lading.2ElectricalThe motor amperage and voltage ratings must bechecked for compatibility to supply voltage priorto final electrical connection. Wiring must conformto local and national codes. Consult local codeauthorities for specific requirements.StorageProduct is protected against damage duringshipment. If the product cannot be installed andoperated immediately, precautions need to betaken to prevent deterioration of the product duringstorage. The user assumes responsibility of theproduct and accessories while in storage. Themanufacturer will not be responsible for damageduring storage. These suggestions are providedsolely as a convenience to the user.Indoor OnlyDo not store this product outdoors. The idealenvironment for the storage of this product isindoors, above grade, in a low humidity atmospherewhich is sealed to prevent the entry of blowingdust, rain or snow. Temperatures should be evenlymaintained between 30 to 110 F (-1 to 43 C) (widetemperature swings may cause condensation and“sweating” of metal parts). All accessories must bestored indoors in a clean, dry atmosphere.Remove any accumulations of dirt, water, ice, orsnow and wipe dry before moving to indoor storage.Allow cold parts to reach room temperature to avoid“sweating” of metal parts. To dry parts and packages,use a portable electric heater to get rid of any moisturebuildup. Leave coverings loose to permit air circulationand to allow for periodic inspection. The unit shouldnot be stored on the floor.Inspection and MaintenanceDuring StorageWhile in storage, inspect product once per month.Keep a record of inspection and maintenanceperformed. If moisture or dirt accumulations are foundon parts, the source should be located and eliminated.Installation and Setup GuideThis guide provides instructions for how toinstall, wire and program the control system foruse when constant pressure in a duct or roomsystem is required. This does not cover ductworkrecommendations or other considerations.

MountingMount the controller in the space to be controlled.Keep wire lengths between the controller and the fanto 200 feet or less.Drywall MountingMounting PlateJunction Box MountingCoverElectrical BoxMounting PlateCover1. Separate the unit from the back plate by drivingin the Allen screw until the two pieces come free.2. Place the base plate against the wall where youwant to mount the sensor.1. Separate the unit from the back plate by drivingin the Allen screw until the two pieces come free.3. Using a pencil mark out the two mounting holesand the area where the wires will come throughthe wall.3. Pull the wire through the hole in the base plate.4. Drill two 3/16 inch holes in the center of eachmarked mounting hole, DO NOT punch theholes or the drywall anchors will not hold. Inserta drywall anchor into each hole.4. Secure the plate to the box using the #6-32 x 5/8inch mounting screws provided.5. Drill one 1/2 inch hole in the middle of themarked wiring area.5. Terminate the unit wiring.6. Pull the wire through the wall and out of the 1/2Inch hole, leaving about six inches free.2. Pull the wire through the wall and out of thejunction box, leaving about six inches free.6. Mold the foam on the unit’s base to the wirebundle to prevent drafts. (see note below)7. Pull the wire through the hole in the base plate.7. Attach Cover by latching it to the top of the base,rotating the cover down and snapping it into place.8. Secure the base to the drywall anchors using the#6 x 1 inch mounting screws provided.8. Secure the cover by backing out the lock-downscrew using a 1/16 inch Allen wrench until it isflush with the bottom of the cover.9. Terminate the unit wiring.10. Mold the foam on the unit’s base to the wirebundle to prevent drafts. (see note below)11. Attach cover by latching it to the top of the base,rotating the cover down and snapping it into place.12. Secure the cover by backing out the lock-downscrew using a 1/16 inch Allen wrench until it isflush with the bottom of the cover.NOTE: In any wall-mount application, the airwithin the wall cavity can cause erroneousreadings. The mixing of room air and air fromwithin the wall cavity can lead to condensation,erroneous readings and sensor failure.To prevent these conditions, Greenheckrecommends sealing the conduit leading tothe junction box, filling the junction box withfiberglass insulation or sealing the wall cavity.3

WiringAll wiring for the Greenheck Temperature andHumidity Controller is Class II low-voltage controlwiring. See the Wiring Diagram on Page 7 for thewiring overview.Main Display 0.76inch 4-digit NumericHeat ControlIconControl box to factory mountedtransformer control formerControl Terminal0 to 10VCOM24VMinor Display0.34 inch 3-digitAlpha-NumericCool ControlIconDotFan ON IconDisplay FeaturesConnect a normally-open switch between terminalsJ17-OVR and J15-GND on the controller. Closingthis switch will activate the remote override feature.Opening the switch will de-activate the override.The minor display is used to describe the unitsdisplayed and the main display shows the numericvalue. The fan icon is illuminated whenever the fanoutput voltage is at or above the minimum specifiedin parameter P8, Minimum % Fan Speed. The Cooland Heat Icons are illuminated in each control moderespectively. The dot in the lower left is used tosignal fan cut-out mode.Optional Output ReferenceNormal Operation (J19 RUN)Optional Remote OverrideA 0 to 10VDC signal is available from J15-REF toJ15-GND. The signal is 15 to 130 F (-10 to 55 C)or 0 to 100% Relative Humidity depending on thevalue of parameter P10 (see pg 6).ScrollButtonThe Greenheck Indoor Air Quality – Temperature/Humidity Controller ships with the following factorysetting: Cooling Control, Temperature Setpoint 72 F,Fan Control output at 2 to 10 Volts and Cut-OutDisabled. Pressing the scroll button at any timeshows the Temperature setpoint, a second pushshows the fan speed in percent.The scroll button will change the display momentarilyto view other information such as setpoints and fanspeed. These are for reference only, and cannotbe adjusted. The exact sequence will depend onthe settings of parameters P0, P1, P2 and P4. Forexamples, see the two figures below.ProgrammingSwitchesProgrammingJumper inRUN ModeUser InterfaceA scroll button protrudes through the case. Theprogramming switches and programming jumper areinside the case.4Scroll ButtonSequence,TemperatureControlCooling Mode, F Temperatureand Display inrun.Scroll Button Sequence,Temperature & Humidity ControlCooling Mode, F Temperatureand Display in run.