Greenheck ERH-45 - Manuals

Wheel Cassette 2 in. filters 2 in. filters 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 in. 36 in. 36 in. T...

1. Piping should be in accordance with accepted industry standards. Pipework should be supportedindependently of the coils. Water connections aremale NPT iron pipe. When installing couplings, donot apply undue stress to the connectionextending through the unit. Use a backup pipewrench to avoid break...

8 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 en...

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...

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...

11 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...

12 ENERGY RECOVERY WHEEL CAUTION: See **WARNING** on page 1 and 11 For the ERH-20 and ERH-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 ERH-55 and E...

13 ROUTINE MAINTENANCE CAUTION: See **WARNING** on Page 1 and 11 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...

14 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...

15 WATER COIL MAINTENANCE CAUTION: See **WARNING** on Page 1 and 11 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 14 for more informationon...

FIGURE 20 For the ERH-20 and ERH-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 ERH-55 and ERH-90 do not slide o...

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 ...

PARTS LIST 1 2 3 4 8 5 6 7 7 9 Model ERH (shown with indirect gas heater) 10 18 1. Supply blower- Forward curved fan- Adjustable motor mount for belt tensioning- Adjustable sheaves for speed control 2. Vibrations isolators (quantity 4 per blower) - Neoprene 3. Energy recovery wheel cassette 4. Remov...

* Always provide the unit model and serial number when requesting parts or service information. * Always check motor amps and compare to nameplate rating. 19 Control power (24 Vac) wiringrun is too long (resistanceshould not exceed 0.75 ohms). Shorten wiring run to mechanical room or install a relay...

IOM ERH FS Rev. 1 January 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 ...