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Part #473007
®
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.
Model ERVe
General Safety Information
Only qualified personnel should
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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 ERVe 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 effectiveness Installation Concerns. . . . . . . . . . . . 3 of 70-80%. Simply pu
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Lifting with a Crane Roof Curb and Rail Mounting 1. Before lifting, be sure that all shipping material Recommended Roof Opening has been removed from unit. 2. To assist in determining rigging requirements, A 1.63 1.63 weights are shown below. 3. Unit must be lifted by all corner lifting points provided on base structure. 4. Rigger to use suitable mating hardware to attach EXHAUST INLET to unit corner lifting points. 5. Spreader bar(s) must span the unit to prevent B damage to the cabin
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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, Unit Side are available on Roof Curb Assembly Instructions, Part Number 472119. Unit Base 1.895 Rooftop units require curbs to be mounted first. The duct connections must be located so they will be clear of structural members of the building. 1. Factory Supplied Roof Curbs: Roof curbs are Insulation Pan 4.844 (I
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CLEARANCE CLEARANCE Rail Mounting / Layout Service Clearances • Rails designed to handle the weight of the ER V e ERVe units require minimum clearances to perform should be positioned as shown on the diagram routine maintenance, such as filter replacement, (rails by others). energy wheel cassette inspection, and fan belt • Make sur e that rail positioning does not interfer e adjustment. Blower and motor assemblies, energy with the supply air discharge opening or the recovery wheel
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CLEARANCE CLEARANCE CLEARANCE CLEARANCE B C Exhaust Air D Weatherhood Electrical Box D A D E Outdoor Air Weatherhood CLEARANCE Dimensional Data D A G RA Intake H SA Discharge B D EA Discharge C SA Discharge E F RA Intake B A OA Intake Exhaust Air Weatherhood E OA Intake Electrical Box Duct Dimensions B C D F G H Unit Size A E ERVe-20 11.8 18.0 12.2 10.7 15.8 18.0 10.8 25.8 C 20.5 13.7 11.9 21.5 20.5 15.8 27.8 ERVe-35 13.1 Outdoor Air ERVe-45 15.8 22.5 16.1 14.0 24.5 22.5 18.8 29.1 Weatherhood 26
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Electrical Information CAUTION The unit must be electrically grounded in accordance High voltage wiring is run in the top roof panel(s) with the current National Electrical Code, ANSI/NFPA of this unit. Do not install sensors or other devices 70. In Canada, use current CSA Standard C22.1, through the top panel(s). Canadian Electrical Code, Part 1. In addition, the WARNING installer should be aware of any local ordinances or electrical company requirements that might apply. To prevent injur
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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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Unit Accessories Exhaust Air Damper Installation Outdoor Air Weatherhood Outdoor air weatherhood will be Instructions (bottom return air intake factory mounted. configuration only) Exhaust Weatherhood 1. Open the exhaust air filter and wheel access door. The exhaust weatherhood is 2. Remove exhaust air filters and possibly the energy shipped separately as a kit with wheel for more working area inside the unit. its own instructions. 3. Remove the two screws holding the damper in Dampers pla
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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 multispeed 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 specific
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Factory Set Points - continued CO SENSOR CONTROL FOR FAN SPEED 2 Resetting the V1000 drive to factory defaults (1/2 SPEED WHEN C0 DROPS bELOW 700 PPM) 2 To reset the V1000 drive back to Greenheck factory (FULL SPEED WHEN C0 RISES AbOVE 800 PPM) 2 defaults go to parameter A1-01 and set it to “2”. Setting Parameter Then go to A1-03 and change it to “1110” and press V1000 J1000 enter. The drive is now reset back to the settings A1-01 Access Level 2 2 programmed at Greenheck. This option is no
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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 a series of junction boxes ganged R together and includes a stainless steel faceplate. The C Unit On/Off remote panel is available with a number of different G Y1 alarm lights and switches to control the unit. The Y2 remote panel ships loose and requires mounting and W1 wiring in the field Frost Control 6 Economizer 7 The remote panel is available with the following Rotation Sens
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Sensors Mounted by Factory Factory mounted temperature, pressure, and current sensors are available in the locations indicated on the unit diagram below. A list of available sensors is shown below. The specific sensors provided on a given unit are labeled in the unit control center on the terminal strip. Sensors are wired to the terminal strip to make it easy for the controls contractor to connect the Building Management System for monitoring purposes. EW-P RAF-P EF-A EAW RAI TO RA FROM OUTS
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o Rotate the fan wheels and energy recovery wheels Start-Up by hand and ensure no parts are rubbing. If rubbing occurs, refer to Start-Up section for more DANGER information. Electric shock hazard. Can cause injury or death. o Check the fan belt drives for proper alignment Before attempting to perform any service or and tension (refer to Start-Up section for more maintenance, turn the electrical power to unit information). to OFF at disconnect switch(es). Unit may have o Filters can loa
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Optional Accessories Checklist Refer to the respective sections in this Installation, Operation and Maintenance Manual for detailed information. Refer to wiring diagram in unit control center to determine what electrical accessories were provided. Provided with Unit? Frost Control Application / Operation section: Setting Factory Default Yes No Frost Control set point 5ºF Differential 2ºF Timer Refer to IOM Yes No Frost Control Modulating Refer to IOM Economizer Application / Operation sect
