Operating Manual_DryCool HD.pdf - HTS

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3 OperationThe DRYCOOL HD can be equipped with variousaccessories to enhance its operation. A remote humidistatmust be used with the unit.3.1 Humidity Control AdjustmentSet the humidity control to the desired humidity level forthe structure. Turning the knob clockwise on the humidistatresults in a drier setting.The dehumidifier will run continuously until the relativehumidity (RH) is reduced to the humidity control dialsetting. Setting the humidity control to lower RH levels willNOT increase the unit’s dehumidification rate; the unit willsimply run longer to reduce the area’s RH to the setting.The DRYCOOL HD (and refrigerant based dehumidifiers ingeneral) will reduce a conditioned space’s RH to a lowerlevel. Settings below 40% are not recommended.3.2 Fan/Filter SwitchTurning ON the fan/filter switch on the side of the unit willcause the DRYCOOL HD internal fan to run continuously,whether the unit is dehumidifying or not.This function is desirable if the unit is used for air circulationand filtration to achieve maximum indoor air quality. Whenthe switch is ON; air will be constantly filtered through theunit and circulated throughout the house. When the switchis OFF; the fan will operate only when the humidity controlcalls for dehumidification.Along with either the high efficiency filter and/or theGermicidal UVC, the DRYCOOL HD can be used to performtotal Indoor Air Quality control for your structure.4 Maintenance4.1 Standard Air FilterThe DRYCOOL HD is equipped with an air filter. This filtershould be checked every three months. Operating the unitwith a dirty filter will reduce dehumidifier capacity andefficiency and may cause the compressor to cycle off andon unnecessarily based on, or due to, high level pressureTo access the air filter, slide the filter out of the side of theunit. The filter can generally be vacuumed clean severaltimes before needing replacement. Replacement filters canbe purchased locally. DO NOT operate the unit without afilter. The heat exchange coils inside the unit could becomeclogged and require disassembly to clean.4.3 Germicidal UVC LightsContinuously operated emitters need to be replacedannually to maintain design output. As a note, emitter on/off cycles should be minimized in order to maximize emitterlife.No more than an ordinary light bulb - SteriLight’s uniqueEmitters are simply changed once a year. SteriLight isvirtually maintenance-free between change outs!CAUTION Do not look at UVC lights whenoperating without adequate eye protection. UVCcan cause damage to unprotected eyes.4.2 High Efficiency Air FilterAn optional high efficiency active electrostatic filteris available for the DRYCOOL HD. This filter is ratedas 90%-95% efficient by the ASHRAE Dust Spot testmethod 52-76. In addition Munters E-Filter, removes otherparticles not measured by the ASHRAE Dust Spot Test.This filter is able to remove allergy causing particles fromthe airstream. Check the high efficiency air filter every 4months and replace if necessary. Do not attempt to cleanthe high efficiency filter. It should be replaced when itbecomes restrictive.The UVC Air Purification System6
5 Service5.1 Technical DescriptionThe DRYCOOL HD uses a refrigeration system similar to anair conditioner’s to remove heat and moisture from incomingair. In addition a dehumidification wheel downstream ofthe evaporator coil removes additional moisture from theairstream in a vapor state.COMPRESSORTXVRefrigeration System of DRYCOOL HDTXEVAPORATORFILTER/DRIERCONDENSERHot, high pressure refrigerant gas is routed fromthe compressor to the condenser coil. The heatfrom the condenser is used to reactivate thedesiccant dehumidification wheel. The heat applied to thedesiccant dehumidification wheel allows water to evaporateoff the wheel and be discharged by the reactivation fan.The reactivation air needs to be ducted to the outside.The refrigerant is cooled and condensed by giving up itsheat to the air that is about to be discharged from theunit. The refrigerant liquid then passes through a filter/drier and capillary tubing which cause the refrigerantpressure and temperature to drop. It next enters theevaporator coil where it absorbs heat from the incomingair and evaporates. The compressor evacuates the coolrefrigerant gas from the accumulator and compressesit to a high pressure and temperature to repeatthe process.5.2 TroubleshootingFan runs with fan switch and ventilation timer OFF, butcompressor cycles on & off.1.2.3.4.5.Low ambient temperature and/or humidity causing unitto cycle through defrost mode.Dirty air filter(s) or air flow restricted.Defrost thermostat defective .Defective compressor overload.Defective compressor.Fan does not run with fan switch in either position. Fandoes not run with ventilation timer activated. Compressorruns briefly but cycles on & off with humidity control turnedto ON.1.2.3.4.Loose connection in fan circuit.Obstruction prevents fan impeller rotation.Defective fan.Defective fan relay.Evaporator coil frosted continuously, low dehumidifyingcapacity.1.2.3.Dirty air filter(s) or air flow restricted.Unit defrost thermostat loose or defective.Low refrigerant charge.Emitter does not light1.2.3.4.5.Turn off power for 10 minutes and then turn powerback on.Check line voltageCheck wiring to emitterReplace emitterReplace power supplyLow Output or visibly weak light1.2.3.Replace emitter with new unitCheck line voltageCheck wiring to emitterRed/Orange light1. Check ambient temperature, light will not operateproperly below 35°F2. Follow actions for “Low Output”7
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