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**WARNING**

DISCONNECT AND SECURE TO THE "OFF"

POSITION ALL ELECTRICAL POWER TO THE

UNITS PRIOR TO INSPECTION OR SERVICING.

FAILURE TO COMPLY WITH THIS SAFETY

PRECAUTION COULD RESULT IN SERIOUS

INJURY OR DEATH.

**IMPORTANT**

ALL FACTORY PROVIDED LIFTING LUGS MUST

BE USED WHEN LIFTING THE UNITS. FAILURE

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

INSTALLATION, OPERATION AND MAINTENANCE MANUAL

Heating Section

Energy Recovery Wheel

INSTALLATION SUPPLEMENT

Refer to the following Greenheck installation
supplement for ERH units supplied with Indirect
Gas (IG) heating:

Model PVF, Indirect Gas Fired Furnaces for
Energy Recovery Units, Part #461006

Содержание ERH-20

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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