Greenheck HRE-20 - Manual - manualsarea.com

Page 3 - INSTALLATION; LIFTING; THE USE OF ALL; FIGURE 1; UNIT WEIGHTS; Model; All dimensions shown are in inches.; FIGURE 2

INSTALLATION The system design and installation should followaccepted industry practice, such as described in theASHRAE Handbook. Adequate space should be left around the unit forpiping coils and drains, filter replacement, andmaintenance. Sufficient space should be provided onthe side of the unit f...

Page 4 - FIGURE 4; DUCT WORK CONNECTIONS; Supply weatherhood will be factory mounted.; EXHAUST WEATHERHOOD; Factory Supplied Roof Curbs; instructions on page 3 of; ROOF CURB MOUNTING; Curb Outside Dimensions; FIGURE 3

4 R o tat ion Length of Straight Duct GOOD R o tat ion POOR FIGURE 4 DUCT WORK CONNECTIONS Examples of good and poor fan-to-duct connections are shown below (See FIGURE 4). Airflow out of the fanshould be directed straight or curve the same direction as the fan wheel rotates. Poor duct installation ...

Page 5 - ELECTRICAL CONNECTIONS; Air Fan; TYPICAL CONTROL CENTER COMPONENTS; FIGURE 5

5 MainDisconnect On Off Exhaust Hood Control Center Intake Hood INSTALLATION (continued) ELECTRICAL CONNECTIONS The electrical supply must be compatible with that shown on the nameplate: voltage, phase, and amperagecapacity. The electrical supply line must be properly fused and conform to local and ...

Page 6 - SERVICE CLEARANCES / ACCESS PANEL LOCATIONS for Model HRE; refer to FIGURES 6 and 7 below for these dimensions.; FIGURE 6; TOP VIEW; FIGURE 7

Wheel Cassette 2 in. filters 2 in. filters Direct Evap Section Exhaust Air Intake Electrical Box Access Panel Access Panel Access Panel Access Panel Access Panel Cassette Slides Out 52 in. Clearance with IG Heater 0 in. Clearance without IG Heater Exhaust Hood Outdoor Air Hood IG Heater *48 in. **64...

Page 7 - Evaporative Cooling Modules; Indirect Evaporative Cooler; Unit Size

1. After the energy recovery unit is set in place, run the overflow and drain lines to the exterior fittingson the evaporative cooler (drain & overflowconnections at unit are 3 ⁄ 4 -inch female pipe thread). The supply line can be attached at thedownstream side of the evaporative cooler. Amanual...

Page 8 - Run water supply line to the unit and install; WATER CONTROL OPTIONS FOR EVAPORATIVE COOLING

Auto Drain and Fill with Freeze Protection This system will automatically drain the sump tank and fill it with fresh water at the field adjustable intervals,typically once every 24 hours. This flushes mineral build-up and debris from the tank to promote lowmaintenance and increase media pad life. In...

Page 9 - Inadequate cooling; TROUBLE SHOOTING FOR EVAPORATIVE MODULE

Symptom Solution Leaving Air Entering Air 45 ° 15 ° Insufficient watervolume or recirculationpump not operating Irregular waterdistribution on coolingmedia Scale and mineraldeposit formation onface of media Excessive waterdischarge into drain Water Carry-Over Poor performance aftercooling padreplace...

Page 10 - EVAPORATIVE COOLING MAINTENANCE

10 Regularly scheduled maintenance is the key to peakperformance, minimized cost, and extended life of theevaporative cooler. The following is a checklist ofitems that need to be looked at on a regular basis. 1. The media should be checked for mineral andforeign material deposits that have built up....

Page 12 - ELECTRIC HEATER APPLICATION/OPERATION; Post-Heater Control Panel; Disconnect

12 ELECTRIC HEATER APPLICATION/OPERATION Factory installed electric heaters can be provided for preheat and/or post-heat (see FIGURE 11). An electricpreheater warms the outdoor air prior to the energy recovery wheel to prevent frosting on the wheel. An electricpost-heater warms the air leaving the e...

Page 13 - Timer Scale; minor field adjustments

FROST CONTROL APPLICATION/OPERATION DIRTY FILTER SWITCH SETUP When outdoor air temperatures are extremely cold, moisture condensation and frosting on the energy recoverywheel is possible. Frost control is an optional feature that will prevent wheel frosting. Two options are available: 1) Timed Exhau...

Page 14 - Testing; ECONOMIZER APPLICATION/OPERATION; AUTO DRY CYCLE

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 a Temperature or Enthalpy sensor mounted in the supply airinlet compartment (see FIGURE 13). This Primary sensor will de-energize the energy wheel wh...

Page 15 - the “Trouble Shooting” section of this manual if a problem develops.; START UP CHECKS; THEY PREVENT THE ENTRY OF FOREIGN OBJECTS SUCH AS LEAVES, BIRDS, ETC.; Disconnect and lock-out all power switches to fan.; Special Tools Required

15 GENERAL Check all fasteners and set screws for tightness. This is especially importantfor bearings and fan wheels. Also, if dampers are not motorized, check thatthey open and close without binding. FAN WHEEL ROTATION Hand rotate the blower to ensure that the wheel is not rubbing against thescroll...

Page 16 - Leak test thermal system to insure tight connections.; FAN RPM; Do not operate units with access doors/panels

16 ENERGY RECOVERY WHEEL CAUTION: See **WARNING** on page 1 and 15 For the HRE-20 and HRE-45, open the access door marked"Energy Wheel Cassette Access". UNPLUG the wheel drivemotor and remove the metal spacer. Then pull the cassetteout halfway as seen in FIGURE 17. Note: For the HRE-55 and H...

Page 17 - ROUTINE MAINTENANCE; FAN BELTS; MOTORS

17 ROUTINE MAINTENANCE CAUTION: See **WARNING** on Page 1 and 15 Once the unit has been put into operation, a periodic maintenance program should be set up to preserve thereliability and performance. Items to be included in this program are: • BELTS • MOTORS • WHEEL AND FASTENERS • VIBRATION • FILTE...

Page 18 - Internal; VIBRATION; TABLE 2

18 EXTERNAL FILTER MAINTENANCE Aluminum mesh 2 in. filters are located in thesupply weatherhood (if the weatherhood optionwas purchased). Filters should be checked andcleaned on a regular basis for best efficiency. Thefrequency of cleaning depends upon thecleanliness of the incoming air. To remove t...

Page 19 - WATER COIL MAINTENANCE; FILTERS; TEST THE SPRAY PRESSURE; over a small corner of the coil to determine if the fins

19 WATER COIL MAINTENANCE CAUTION: See **WARNING** on Page 1 and 15 FILTERS Filters upstream of the coil should be checked regularly. If the filters are dirty, they should be cleaned orreplaced. It is important that the coils stay clean to maintain desired airflow. See page 18 for more informationon...

Page 20 - ACCESSING ENERGY RECOVERY WHEEL; ROUTINE ENERGY RECOVERY WHEEL MAINTENANCE; MAINTENANCE OF THE ENERGY RECOVERY WHEEL

FIGURE 20 For the HRE-20 and HRE-45, open the access door marked "Energy Wheel Cassette Access" (FIGURE 20).UNPLUG the wheel drive motor and remove the metal spacer. Then pull the cassette out halfway (FIGURE 21). The energy recovery wheel cassettes for model HRE-55 and HRE-90 do not slide o...

Page 21 - REMOVING THE ENERGY RECOVERY WHEEL SEGMENTS

CLEANING ENERGY RECOVERY WHEEL SEGMENTS If the wheel appears excessively dirty, it should be cleaned to ensure maximum operating efficiency. Onlyexcessive buildup of foreign material needs to be removed. DISCOLORATION AND STAINING OF ENERGY RECOVERY WHEEL DOES NOT AFFECT ITS PERFORMANCE. Thoroughly ...

Page 23 - Trouble Shooting

* Always provide the unit model and serial number when requesting parts or service information. * Always check motor amps and compare to nameplate rating. 23 Control power (24 Vac) wiringrun is too long (resistanceshould not exceed 0.75 ohms). Shorten wiring run to mechanical room or install a relay...

Page 24 - IOM HRE FS; Warranty; GREENHECK; Possible Cause

IOM HRE FS Rev. 2, July 2002 Warranty Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year fromthe purchase date. The energy recovery wheel is warranted to be free from defects in material and workmanship for aperiod of five years from the pu...

Greenheck HRE-20 - Manual

Table of Contents:

Summary

Other Greenheck Models