Operating Manual_DryCool HD.pdf - HTS

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Additional considerations are as follows:1.2.3.4.Outside air is filtered before entering the building.Outside air will be dehumidified before entering if theunit is running in dehumidification mode.Drawing air from outside and blowing inside aids inslightly pressurizing the structure. This helps preventdirty and humid air from entering elsewhere.Adequate exhaust fans are recommended in the bathrooms and kitchen.In cold climates or areas where the outdoor dew point is lowat times, ventilation can be used to dehumidify the structure.This is accomplished by bringing the dry, low dew pointair into the structure during these times. This approach isoften more economical than running the dehumidifier toremove excess moisture from the structure.In cold climates, it is critical to adequately ventilate toreduce the inside moisture content to avoid moistureaccumulating in the wall cavities. For example; in a housethat experiences condensation on the interior surface ofthe windows during the winter, increasing the amount ofventilation will often cure the problem.The DRYCOOL HD is designed to move 250 cfm. Aninsulated 8"diameter duct is generally sufficient to provideup to 75 cfm of outside air. Remaining 175 cfm of return aircan be mixed with this fresh air and ducted into the supplyintake of the DRYCOOL HD.1.1.4 Installation in Basement or Crawl Space with Existing Forced Air HVACAHUAHUConditioned Unventilated Basement InstallationVentilated Unconditioned Basement InstallationIf the existing system has multiple returns, select one todisconnect from the existing forced air system and use itfor the dedicated DRYCOOL HD return. Always select areturn from a central location in the structure in an area thatis always open to the rest of the structure.Do not use a return from a room that often may have itsdoor closed. If the structure in which the DRYCOOL HDis to be installed has an existing forced air HVAC system,utilize the HVAC system to make the DRYCOOL HD unitinstallation easier.Basement Installation: Install a separate 8" return duct forthe DRYCOOL HD in a central area of the structure. Ductthe supply of the DRYCOOL HD to an 8" x 8" x 8" tee/damper that is 20% open to the basement. Duct the otherside of the tee to the air supply of the existing HVAC system.Connect a 8" reactivation duct to the reactivation outlet toexpel moist air outside the basement.Crawl Space Installation: Install a separate return for theDRYCOOL HD in a central area of the structure. Duct thesupply of the DRYCOOL HD to an 8" x 8" x 8" tee/damperthat is 20% open to the crawl space. Duct the other sideof the tee to the air supply of the existing HVAC system.Connect an 8" reactivation duct to the reactivation outletto expel moist air outside the basement.2
1.1.5 Installation in an Attic with a Existing Forced Air HVACAHUAttic InstallationALWAYS install a secondary catch pan with a drain or float interrupt for condensate under the DRYCOOL HD in an attic.Locate a separate return for the DRYCOOL HD in a central area of the structure or draw air from return ductwork. Ductthe supply side of the DRYCOOL HD to the air supply of the existing HVAC system. Connect an 8" reactivation duct tothe reactivation outlet to expel this “moist” air outside the basement.1.1.6. Installation for Dehumidifying for a Stand Alone SpaceOne of the benefits of a DRYCOOL HD is the deliveryof dehumidified air to the space at approximately thesame temperature that enters the device. This allowsan owner to simplify the installation for applications orinstances where it is desired to maintain humidity levelsin one open space. In these applications the return airfrom the space is connected directly to the unit and thedehumidified air can be delivered directly back into theroom without the need to mix it with cold air coming from acentral air conditioning system.HUMIDISTATRETURN AIRSUPPLY OUTREACT OUTLETREACT INLETIf the space is a large common room and is open toother adjacent rooms, using the DRYCOOL HD canhave the effect of providing dehumidification to muchlarger connected areas or even a small structure. Watervapor diffuses from areas of high vapor pressure toareas of low vapor pressure. When large spaces aredehumidified with a DRYCOOL HD, areas of low vaporpressure are created and will induce water vapor movementfrom other connected open rooms without the needfor ducting.The figure shows how the unit draws return air from thecommon space or a ventilated closet and discharges thedehumidified air back into the space.STAND ALONESPACECLOSET OR OTHERSTORAGE AREAThe DRYCOOL HD requires the mounting of theremote humidistat away from the discharge in anarea that is representative of the larger space. As with allof the installation configurations of a unit, the reactivationair still needs to be ducted to and from the outdoors asshown here.3
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Operating Manual_DryCool HD.pdf - HTS

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