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Part #455924
®
Energy Recovery Ventilators
Installation, Operation and Maintenance Manual
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the
product described. Protect yourself and others by observing all safety information. Failure to comply with instructions
could result in personal injury and/or property damage! Retain instructions for future reference.
Models: ERV-251
ERV-361
ERV-521
ERV-581
ERV-522
ERV-582
General S
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Machined parts coated with rust preventive should Receiving be restored to good condition promptly if signs of Upon receiving the product, check to make sure rust occur. Immediately remove the original rust all items are accounted for by referencing the bill preventive coating with petroleum solvent and clean of lading to ensure all items were received. Inspect with lint-free cloths. Polish any remaining rust from each crate for shipping damage before accepting surface with crocus cloth
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Table of Contents Basic Operation Basic Operation . . . . . . . . . . . . . . 3 The ERV brings in fresh, outdoor air and removes Installation stale, exhaust air. Prior to discharging the exhaust Supplemental Installation, Operation and air, the energy recovery wheel transfers energy from Maintenance Manuals . . . . . . . . . . . 3 the exhaust air to the outdoor air at an efficiency Installation Concerns. . . . . . . . . . . . 3 of 70-80%. Simply put, t
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Lifting Recommended Roof Opening V 1. Before lifting, be sure that all shipping material has been removed from unit. 2. To assist in determining rigging requirements, weights are shown below. EXHAUST 3. Unit must be lifted by all lifting lugs provided on INTAKE base structure. U 4. Rigger to use suitable mating hardware to attach to unit lifting lugs. 5. Spreader bar(s) must span the unit to prevent SUPPLY damage to the cabinet by the lift cables. DISCHARGE 0.50 0.50 ERV-251, 361, 521
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n n n n o o o o i i i i t t t t a a a a t t t t o o o o R R R R n n n n Roof Curb Mounting Curb Outside Dimensions - continued Roof curb details including duct location dimensions, are available on ERV-522 & 582 Roof Curb Assembly Base Side of Unit Instructions, Part #460988. A Rooftop units require curbs to be mounted first. The B duct connections must be located so they will be C clear of structural members of the building. D E 1-inch Insulation 1. Factory Supplied Roof Curbs: Roof curbs
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OUTDOOR AIR INTAKE END OUTDOOR AIR INTAKE END OUTDOOR AIR INTAKE END OUTDOOR AIR INTAKE END Rail Mounting / Layout • Rails designed to handle the weight of the ER V should be positioned as shown on the diagram (rails by others). • Make sur e that rail positioning does not interfer e with the supply air discharge opening or the exhaust air intake opening on the ERV unit. Avoid area dimensioned “B” below. • Rails should extend beyond the unit a minimum of 12 inches on each side. • Se
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Access Panel Access Panel Access Panel Access Panel Access Panels Access Panels Access Panel Access Panel Service Clearances ERV-251, 361, 521 and 581 units require minimum clearances to perform routine maintenance, such as filter replacement, energy wheel cassette inspection, and fan belt adjustment. Blower and motor assemblies, energy recovery wheel cassette and filter sections are always provided with a service door or panel for proper component access. Clearances for component removal m
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Electrical Information WARNING The unit must be electrically grounded in accordance To prevent injury or death due to electrocution or with the current National Electrical Code, ANSI/NFPA contact with moving parts, lock disconnect switch 70. In Canada, use current CSA Standard C22.1, open. Canadian Electrical Code, Part 1. In addition, the Most factory supplied electrical components are installer should be aware of any local ordinances or prewired. To determine what electrical accessories
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Typical Control Center Components Electric Heater Application/Operation Factory installed electric heaters can be provided for 1. Main Disconnect (non-fusible, lockable) preheat frost control. An electric preheater warms 2. Motor Starter – Exhaust Air Fan the outdoor air prior to the energy recovery wheel 3. Motor Starter – Outdoor Air Fan to prevent frosting on the wheel. Electric heaters 4. Motor Contactor – Energy Wheel are available in 208, 230, or 460 VAC (refer to heater 5. 24 V
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Access Panel Description and Location ERV-251, ERV-361, ERV-521, ERV-581 ERV-522 Interior Rooftop Outdoor Air Discharge Outdoor Air Interior Rooftop Discharge Exhaust Air 5 Inlet Exhaust Air Inlet 1 2 2 6 3 3 3 4 4 1 Outdoor Air Intake Outdoor Air Inlet Inlet Hood Exhaust Air Discharge Exhaust Air Exhaust Exhaust Hood Discharge Hood Intake Hood Arrangement A Arrangement A Rooftop Interior Outdoor Air Discharge Interior Rooftop Outdoor Air Exhaust Air Discharge 5 Inlet Exhaust Air Inlet 1 2 3 2 6
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ERV-582 Interior Rooftop Outdoor Air Discharge 2 Exhaust Air Inlet 3 3 4 1 Outdoor Air Inlet Exhaust Air Discharge Exhaust Hood Intake Interior Rooftop Hood Arrangement A Outdoor Air Discharge Exhaust Air Inlet 2 3 3 4 1 Outdoor Air Inlet Exhaust Air Discharge Exhaust Hood Intake Hood Arrangement B, C or D 1 Exhaust blower and motor Electric control center Main disconnect 2 Supply blower and motor Exhaust air intake damper Energy wheel cassette Internal filters 3 Frost control Outdoor air sens
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Dimensional Data ERV-251, 361, 521 and 581 Exterior Dimensions Unit Opening Dimensions Unit Size Unit Size A B C D E F G K L Q P 3 ERV-251 46 34 27 12 8 ERV-251 10 16 6 ⁄4 7 10 16 3 1 ERV-361 62 51 34 18 15 ERV-361 18 18 8 ⁄8 11 ⁄2 19 18 3 1 ERV-521 67 67 44 16 15 ERV-521 24 24 10 ⁄4 13 ⁄2 26 26 3 ERV-581 75 70 67 16 22 ERV-581 22 27 16 18 ⁄4 28 48 All dimensions are in inches. All dimensions are in inches. Arrangement B Arrangement B Arrangement A Arrangement A Arrangement B Arrangement A Outdo
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ERV-522 and 582 Exterior Dimensions Unit Opening Dimensions Unit Size Unit Size A B C D E F G K L Q P 5 ERV-522S 124 84 64 16 19 ERV-522S 48 25 16 18 ⁄8 60 25 ERV-522H 124 84 64 16 19 ERV-522H 48 25 19 22 60 25 1 3 ERV-582H 146 97 77 17 ⁄2 26 ⁄4 ERV-582H 60 28 23 25 70 30 All dimensions are in inches. All dimensions are in inches. Outdoor Air Discharge Outdoor Air Discharge Exhaust Air Inlet L x K L x K H x J Exhaust Air Inlet F x G Outdoor Air Inlet Q x P C C E A A D Intake Exhaust Air Disc
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• After testing, set the Timer Scale as follows: Optional Accessories T1 = 10 minutes, T2 = 1 hour Frost Control Application/Operation • Set the Timer Settings as follows: Extremely cold outdoor air temperatures can cause T1 = 0.5, T2 = 0.5 moisture condensation and frosting on the energy The timer is now set for 5 minutes off and 30 recovery wheel. Frost control is an optional feature minutes on. Remember to remove the jumper. that will prevent/control wheel frosting. Three
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should not light and the energy recovery wheel Economizer Application/Operation should energize and rotate. The energy recovery wheel operation can be altered If these steps provide the results described, the to take advantage of economizer operation (free enthalpy economizer is working properly. cooling). Two modes are available: 1. De-energizing the wheel • T ur n unit power of f. Reconnect C7400 Solid State 2. Modulating the wheel Enthalpy Sensor to terminal So. A field suppli
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Variable Frequency Drives for Energy Recovery Blowers Optional factory installed, wired, and programmed variable frequency drives (VFDs) may have been provided for modulating or multi-speed control of the blowers. One VFD is provided for each blower (supply air and exhaust). The VFD’ s pr ovided ar e either Y askawa model V1000 or J1000. Refer to the tables in this section for factory settings and field wiring requirements. Refer to the unit control center for unit specifi
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Factory Set Points - continued CO SENSOR CONTROL FOR FAN SPEED 2 Resetting the drive to factory defaults (1/2 SPEED WHEN C0 DROPS bELOW 700 PPM) 2 To reset the drive back to Greenheck factory defaults Setting go to parameter A1-01 and set it to “2”. Then go to Parameter V1000 J1000 A1-03 and change it to “1110” and press enter. The A1-01 Access Level 2 2 drive is now reset back to the settings programmed at b1-01 Reference Source (Frequency) 0 0 Greenheck. b1-17 VFD Start-Up Setting 1 1 MO
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Typical Wiring Diagram Following is an example of a typical wiring diagram located in the unit control center. This wiring diagram includes a legend highlighting which accessories were provided with the unit. Factory wiring and field wiring are also indicated. This particular example includes 1) variable frequency drives on the blowers requiring a modulating input, 2) modulating energy recovery wheel with factory controls for economizer, 3) energy recovery wheel rotation sensor, 4) outdoor a
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Rotation Sensor CO Sensor 2 The rotation sensor monitors energy recovery wheel This accessory is often used to provide a modulating rotation. If the wheel should stop rotating, the sensor control signal to a variable frequency drive to raise will close a set of contacts in the unit control center. and lower airflow in relationship to the CO levels 2 Field wiring of a light (or other alarm) between in the space. This strategy is often referred to as terminals R & 12 in the unit control cente
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Indicator Lights powered by the ER Unit Remote Control Panel and Wiring Schematics The remote panel is available with a number of R different alarm lights and switches to control the unit. C Unit On/Off The remote panel ships loose and requires mounting G Y1 and wiring in the field Y2 The remote panel is available with the following W1 Frost Control 6 options: Economizer 7 • Unit on/of f switch Rotation Sensor 12 • Unit on/of f light • 7-day time clock PS2 • Hand/of f/a
