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CLEANING ENERGY RECOVERY WHEEL SEGMENTS

If the wheel appears excessively dirty, it should be cleaned to ensure maximum operating efficiency. Only
excessive buildup of foreign material needs to be removed. 

DISCOLORATION AND STAINING OF ENERGY

RECOVERY WHEEL DOES NOT AFFECT ITS PERFORMANCE.

Thoroughly spray wheel matrix with household cleaner such as Fantastic™ or equivalent. Gently rinse with warm
water and using a soft brush remove any heavier accumulation. A detergent/water solution can also be used.
Avoid aggressive organic solvents, such as acetone. The energy recovery wheel segments can be soaked in the
above solution overnight for stubborn dirt or accumulation. 

After cleaning is complete, shake the excess water from the wheel or segments. Dry wheel or segments before
placing them back into the cassette. Place wheel or segments back into cassette by reversing removal
procedures.

**  DO NOT CLEAN ENERGY RECOVERY WHEEL SEGMENTS WITH WATER IN EXCESS OF 140°F
**  DO NOT DRY ENERGY RECOVERY WHEEL SEGMENTS IN AIR IN EXCESS OF 140°F.

IMPORTANT!

PLACE RETAINERS BACK IN THE ORIGINAL
POSITION BEFORE ROTATING THE ENERGY
RECOVERY WHEEL. OTHERWISE DAMAGE TO
RETAINER WILL OCCUR.

Bracket Segment Retainer

Lift Away
From Segment

Catch-
Segment Retainer

Push Toward Center

Center of Wheel

Spoke

Inside of Wheel Rim

FIGURE 22

Model ERH-20, 45, 55, & 90

Steel retainers are located on the
inside of the wheel rim (FIGURE 22).
Push the retainer toward center of
wheel, then lift up and away to
release segments (FIGURE 23).

REMOVING THE ENERGY RECOVERY WHEEL SEGMENTS

FIGURE 23

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Summary of Contents for ERH-20

Page 1: ...E TO COMPLY WITH THIS SAFETY PRECAUTION COULD RESULT IN PROPERTY DAMAGE SERIOUS INJURY OR DEATH PART 459657 READ AND SAVE THESE INSTRUCTIONS ENERGY RECOVERY UNIT with HEATING Models ERH 20 45 55 90 IN...

Page 2: ...n wheel 11 Fan RPM 12 Energy Recovery Wheel 12 Coils 12 Routine Maintenance 13 14 Belts 13 Motors 13 Blower Wheel and Fasteners 13 Vibration 14 Filters 14 Coil Maintenance 15 Energy Recovery Wheel Mai...

Page 3: ...nsure stability and balance Avoid twisting or uneven lifting of the unit Never lift units by weatherhoods The ERH brings in fresh outdoor air and removes stale exhaust air Prior to discharging the exh...

Page 4: ...ervice clearances Keep the supply inlet of the unit away from any other exhaust fans 3 Install Curb Locate curb over roof opening and fasten in place Check that the diagonal dimensions are within 1 8...

Page 5: ...nect separate from the unit disconnect Thus electric post heaters require a separate power connection IMPORTANT Use minimum 14 ga wire for 24 volt control power Control wire resistance should not exce...

Page 6: ...ntenance that must be performed Blower and motor assemblies energy recovery wheel cassette coil and filter sections are always provided with a service door or panel for proper component access Clearan...

Page 7: ...S HIGHLY RECOMMENDED 5 Pipe sizes for the system must be selected on the basis of the head pressure available from the circulation pump The velocity should not exceed 6 feet per second and the frictio...

Page 8: ...irst stage of the preheater will turn on If the first stage does not satisfy the set point the second stage will also turn on Post heaters Post heaters are standard as 4 stage step control Post heater...

Page 9: ...ches the thermostat setting the electric preheater will turn on and warm the air entering the energy wheel Testing Turn the thermostat as high as it will go The heater should turn on If it doesn t eit...

Page 10: ...nsor up as high as it goes and keep the Override sensor as low as it will go The wheel should stop rotating Turn both sensors as high as they will go The wheel should start rotating Set the Temperatur...

Page 11: ...ree phase units interchange any two power leads this can be done at the motor starter START UP CHECKS WARNING DO NOT OPERATE ENERGY RECOVERY VENTILATOR WITHOUT THE FILTERS AND BIRDSCREENS INSTALLED TH...

Page 12: ...sen all eight seal retaining screws These screws are located on the bearing support that spans the length of the cassette through the wheel center Tighten the screws so the air seals tug slightly on t...

Page 13: ...MOTORS Motor maintenance is generally limited to cleaning and lubrication where applicable Cleaning should be limited to exterior surfaces only Removing dust and grease build up on the motor housing a...

Page 14: ...FIGURE 19 Internal Model Filter Size Quantity ERH 20 20 x 20 2 ERH 45 20 x 25 3 ERH 55 16 x 25 6 ERH 90 20 x 20 8 VIBRATION Excessive vibration maybe experienced during initial start up Left unchecke...

Page 15: ...from the fan and create an environment for odor and bacteria to grow and spread through the conditioned zone High pressure water 700 Psi or less may be used to clean coils with fin thickness over 0 0...

Page 16: ...by entering the unit through the Exhaust Blower access door WARNING Disconnect power to the unit before performing any type of service ACCESSING ENERGY RECOVERY WHEEL FIGURE 21 ROUTINE ENERGY RECOVERY...

Page 17: ...eaning is complete shake the excess water from the wheel or segments Dry wheel or segments before placing them back into the cassette Place wheel or segments back into cassette by reversing removal pr...

Page 18: ...minum mesh filter 6 Optional exhaust weatherhood with birdscreen 7 Optional supply and exhaust air filter racks with 2 in pleated 30 efficient filters 8 Electrical control box standard features Single...

Page 19: ...higher or lower than design If higher ductwork should be improved If lower fan rpm should be lower Blower rotation is incorrect Check rotation and reverse if necessary Motor voltage incorrect Check mo...

Page 20: ...eded Air seals are too tight See Energy Recovery Wheel on page 12 Economizer sensors are operating Adjust temperature or enthalpy set points as needed No power to wheel motor Make sure wheel drive is...

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