Installation, Operation and Maintenance Manual

1 Document 476054. Model ERCH. Energy Recovery Ventilator with Heating and Cooling installation , Operation and Maintenance Manual Please read and save these instructions for future reference. 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! General Safety Information Only quali ed personnel should install this system. Personnel should have a clear understanding of these DANGER. instructions and should be aware of general safety Always disconnect power before working on or near precautions. Improper installation can result in electric this equipment. Lock and tag the disconnect switch shock, possible injury due to coming in contact with or breaker to prevent accidental power up.

2 Moving parts, as well as other potential hazards, If this unit is equipped with optional gas including environmental. Other considerations may be accessories, turn off gas supply whenever power is required if high winds or seismic activity are present. disconnected. If more information is needed, contact a licensed CAUTION. professional engineer before moving forward. This unit may be equipped with a compressed 1. Follow all local electrical and safety codes, as well as refrigerant system. If a leak in the system should the National Electrical Code (NEC), the National Fire occur, immediately evacuate and ventilate the area. Protection Agency (NFPA), where applicable. Follow An EPA Certified Technician must be engaged to the Canadian Electrical Code (CE) in Canada. make repairs or corrections. Refrigerant leaks may 2. All moving parts must be free to rotate without also cause bodily harm.

3 Striking or rubbing any stationary objects. CAUTION. 3. Unit must be securely and adequately grounded. 4. Do not spin fan wheel faster than maximum When servicing the unit, the internal components may cataloged fan RPM. Adjustments to fan speed be hot enough to cause pain or injury. Allow time for signi cantly affect motor load. If the fan RPM is cooling before servicing. changed, the motor current should be checked to WARNING. make sure it is not exceeding the motor nameplate The roof lining contains high voltage wiring. To amps. prevent electrocution, do not puncture the interior or 5. Verify that the power source is compatible with the exterior panels of the roof. equipment. 6. Never open access doors to the unit while it is running.. Energy Recovery Ventilator with Heating and Cooling 1. Table of Contents General Safety Information.

4 1 Start-Up Receiving, Handling and Storage ..3 Warnings ..29. Product Overview ..4 Special Tools Required ..29. Optional Subassemblies .. 4-5 Start-Up Procedure ..29. installation Voltage Imbalance ..29. Unit Dimensions and Weights ..6 Pre-Start-Up Checklist ..30. Curb Outside Dimensions, Recommended Start-Up Checklist .. 30-31. Roof Openings and Curb Weights ..7 Optional Accessories Checklist ..32. Service Clearances and Access Locations .. 8-12 Start-Up Components Handling ..13 Energy Wheel ..33. Lifting ..13 Fans .. 33-34. Roof Curb Mounting ..14 Vibration ..34. Optional Piping Vestibule ..14 Hot Gas Bypass Valve ..34. Rail Mounting/Layout ..15 Optional Start-Up Components Duct Connections ..15 Dirty Filter Switch ..35. Electrical installation Economizer .. 35-36. Procedure ..16 Frost Control ..36. Field-Provided Disconnect.

5 17 Airflow Monitor ..37. Discharge Air Temperature Sensor ..17 Evaporative Cooler..38. Typical Control Center Components ..17 Variable Frequency Drives .. 39-40. Optional Accessory Wiring Schematics..18 Routine Maintenance Piping installation Maintenance Frequency..41. Optional Gas Piping ..19 Units with Packaged DX ..41. Gas Connections ..19 Units with Heat Pump ..41. Optional Coil Piping ..19 Maintenance Procedures Water ..19 Lubrication ..42. Direct Expansion ..19 Dampers ..42. Condensate Drain Trap ..20 Gas Furnace ..42. Heat Pump Piping Sizes & Connections ..20 Fan Belts ..42. Evaporative Cooler ..21 Fan Motors ..42. Water Supply Locations ..22 Fan Wheel & Fasteners ..42. Unit Overview Bearings ..42. Basic Unit ..23 Internal Filter ..43. Optional Component Overview External Filter ..43. Economizer ..23 Coils ..43. Frost Control.

6 24 Door Seals ..43. Variable Frequency Drive ..24 Energy Wheel ..44. CO2 Sensor ..24 Evaporative Cooling ..45. Phase Monitor ..24 Troubleshooting Rotation Sensor ..24 Unit ..46. Dirty Filter Sensor ..24 Refrigeration Circuit .. 47-50. Microprocessor Control ..25 Energy Wheel ..50. Unoccupied Recirculation Damper ..25 Evaporative Cooling .. 51-52. Service Outlet..25 Controller Alarms ..53. Vapor Tight Lights ..25 Rotation Sensor ..53. Hot Gas Bypass Valve ..25 Digital Scroll ..53. Hot Gas Reheat Valve ..25 Unit Protection Module ..54. Digital Scroll Compressor ..25 Economizer ..54. Exhaust Fan Only Power ..26 Reference Airflow Monitor ..26 Technical Assistance Information ..54. Smoke Detector ..26 Additional installation , Operation and Cooling System Overview Maintenance Manuals ..54. Packaged DX ..27 Venting Connection Locations.

7 55. Water-Source Heat Pump (HP) ..28 Maintenance Log .. Backcover Our Commitment .. Backcover 2 GeneralRecovery Energy Description Ventilator - NOT model with Heating specificand Cooling . Receiving the oor. Clearance should be provided to permit air circulation and space for inspection. This product may have been subject to road salt during transit. If so, immediately wash off all visible white Outdoor reside from all exterior surfaces. Upon receiving the The unit should be placed on a level surface to prevent product, check to ensure all line items are accounted water from leaking into the unit. The unit should be for by referencing the delivery receipt or packing list. elevated so that it is above water and snow levels. Inspect each crate or carton for shipping damage before Ensure suf cient support to prevent unit from settling accepting delivery.

8 Alert the carrier if any damage is into soft ground. Locate parts far enough apart to detected, do not refuse shipment. The customer shall permit air circulation, sunlight, and space for periodic make notation of damage (or shortage of items) on the inspection. To minimize water accumulation, place all delivery receipt and all copies of the bill of lading should unit parts on blocking supports so that rain water will be countersigned by the delivering carrier. If damaged, run off. immediately contact your manufacturer's representative. Do not cover parts with plastic lm or tarps as these Any physical damage to the unit after acceptance is not cause condensation of moisture from the air passing the responsibility of the manufacturer. through heating and cooling cycles. Handling Inspection and Maintenance While in storage, inspect units once per month.

9 Keep a Units are to be rigged and moved by the lifting brackets record of inspection and Maintenance performed. provided or by the skid when a forklift is used. Location of brackets varies by model and size. Handle in such If moisture or dirt accumulations are found on parts, a manner as to keep from scratching or chipping the the source should be located and eliminated. At each coating. Damaged nish may reduce ability of unit to inspection, rotate the fan wheel by hand ten to fteen resist corrosion. revolutions to distribute lubricant on motor. If paint deterioration begins, consideration should be given to Unpacking touch-up or repainting. Units with special coatings may Verify that all required parts and the correct quantity require special techniques for touch-up or repair. of each item have been received. If any items are Machined parts coated with rust preventive should be missing, report shortages to your local representative to restored to good condition promptly if signs of rust arrange for obtaining missing parts.

10 Sometimes it is not occur. Immediately remove the original rust preventive possible that all items for the unit be shipped together coating with petroleum solvent and clean with lint-free due to availability of transportation and truck space. cloths. Polish any remaining rust from surface with Con rmation of shipment(s) must be limited to only crocus cloth or ne emery paper and oil. Do not destroy items on the bill of lading. the continuity of the surfaces. Wipe thoroughly clean Storage with Tectyl 506 (Ashland Inc.) or the equivalent. For hard to reach internal surfaces or for occasional use, Units are protected against damage during shipment. If consider using Tectyl 511M Rust Preventive, WD-40 . the unit cannot be installed and operated immediately, or the equivalent. precautions need to be taken to prevent deterioration of the unit during storage.