Greenheck-fan HRE-20 Manual de usuario

**WARNING**DISCONNECT AND SECURE TO THE "OFF" POSITION ALL ELECTRICAL POWER TO THE UNITSPRIOR TO INSPECTION OR SERVICING. FAILURE TO COMPLY

10Regularly scheduled maintenance is the key to peakperformance, minimized cost, and extended life of theevaporative cooler. The following is a checkl

111. Piping should be in accordance with acceptedindustry standards. Pipework should be supportedindependently of the coils. Water connections aremale

12ELECTRIC HEATER APPLICATION/OPERATIONFactory installed electric heaters can be provided for preheat and/or post-heat (see FIGURE 11). An electricpre

FROST CONTROL APPLICATION/OPERATIONDIRTY FILTER SWITCH SETUPWhen outdoor air temperatures are extremely cold, moisture condensation and frosting on th

The energy recovery wheel may be de-energized for the purpose of providing economizer (free cooling)operation. This can be achieved with a signal from

15GENERALCheck all fasteners and set screws for tightness. This is especially importantfor bearings and fan wheels. Also, if dampers are not motorized

16ENERGY RECOVERY WHEELCAUTION: See **WARNING** on page 1 and 15For the HRE-20 and HRE-45, open the access door marked"Energy Wheel Cassette Acce

17ROUTINE MAINTENANCECAUTION: See **WARNING** on Page 1 and 15Once the unit has been put into operation, a periodic maintenance program should be set

18EXTERNAL FILTER MAINTENANCEAluminum mesh 2 in. filters are located in thesupply weatherhood (if the weatherhood optionwas purchased). Filters should

19WATER COIL MAINTENANCECAUTION: See **WARNING** on Page 1 and 15FILTERSFilters upstream of the coil should be checked regularly. If the filters are d

GENERALGreenheck Energy Recovery units with Temperingare thoroughly inspected and test run at the factory.However, damage may occur during handling an

FIGURE 20For the HRE-20 and HRE-45, open the access door marked "Energy Wheel Cassette Access" (FIGURE 20).UNPLUG the wheel drive motor and

CLEANING ENERGY RECOVERY WHEEL SEGMENTSIf the wheel appears excessively dirty, it should be cleaned to ensure maximum operating efficiency. Onlyexcess

PARTS LIST1234856779Model HRE(shown with indirect evaporative cooler,optional direct evaporative cooler, andindirect gas heater)10221. Supply blower-

* Always provide the unit model and serial number when requesting parts or service information. * Always check motor amps and compare to nameplate rat

IOM HRE FSRev. 2, July 2002WarrantyGreenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from

INSTALLATIONThe system design and installation should followaccepted industry practice, such as described in theASHRAE Handbook. Adequate space shoul

4RotationLength of Straight DuctGOODRotationPOORFIGURE 4DUCT WORK CONNECTIONSExamples of good and poor fan-to-duct connections are shown below (See FI

5MainDisconnectOnOffExhaustHoodControl CenterIntakeHoodINSTALLATION (continued)ELECTRICAL CONNECTIONSThe electrical supply must be compatible with tha

Wheel Cassette2 in. filters2 in. filtersDirectEvapSectionExhaust AirIntakeElectrical BoxAccess PanelAccess PanelAccess PanelAccess PanelAccess PanelCa

1. After the energy recovery unit is set in place, runthe overflow and drain lines to the exterior fittingson the evaporative cooler (drain & over

Auto Drain and Fill with Freeze ProtectionThis system will automatically drain the sump tank and fill it with fresh water at the field adjustable inte

Symptom SolutionLeaving AirEntering Air45°15°Insufficient watervolume or recirculationpump not operatingIrregular waterdistribution on coolingmediaSca