Operating Instructions & Parts Manual. Energy Recovery Ventilators. Models 2RB84A and 2RB85A

Transcription

1 Operating Instructions & Parts Manual EN Energy Recovery Ventilators Models 2RB84A and 2RB85A

2 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. PLEASE REFER TO BACK COVER FOR INFORMATION REGARDING DAYTON S WARRANTY AND OTHER IMPORTANT INFORMATION. Model #: Serial #: Purch. Date: Form 5S5544 / Printed in USA Version 0 03/ Dayton Electric Manufacturing Co. All Rights Reserved

3 BEFORE YOU BEGIN Electrical Requirements: The power supply to the ventilator should be 115 volt. GETTING STARTED Tools Needed: UNPACKING Volt meter Incline manometer or equivalent Tachometer Ammeter Contents: Dayton Energy Recovery Ventilator (1) Operating Instructions and Parts Manual (1) Inspect: After unpacking unit, inspect carefully for any damage that may have occurred during transit. Check for loose, missing, or damaged parts. Shipping damage claim must be filed with carrier. Check all bolts, screws, set-screws, etc. for looseness that may have occurred during transit. Retighten as required. Rotate blower wheels and energy recovery wheel by hand to be sure they turn freely. See General Safety Instructions on page 2, and Cautions and Warnings as shown. OPERATION TROUBLESHOOTING 1

4 GETTING STARTED GENERAL SAFETY INSTRUCTIONS Energy Recovery Ventilators are designed for indoor installations in commercial and institutional applications. Two air streams simultaneously bring in fresh, incoming outdoor air and exhaust stale air from the space. An energy recovery wheel rotates between the two air streams recovering temperature and moisture from the exhaust air to precondition the outdoor air. Do not depend on any switch as the sole means of disconnecting power when installing or servicing the ventilator. Always disconnect, lock and tag power source before installing or servicing. Failure to disconnect power source can result in fire, shock or serious injury. Motor will restart without warning after thermal protector trips. Do not touch operating motor, it may be hot enough to cause injury. source. Do not place any body parts or objects in ventilator while motor is connected to power TROUBLESHOOTING OPERATION 2 Do not use this equipment in explosive atmospheres! 1. Read and follow all instructions and cautionary markings. Make sure electrical power source conforms to requirements of equipment and local codes. 2. Ventilators should be assembled, installed and serviced by a qualified technician. Have all electrical work performed by a qualified electrician. 3. Follow all local electrical and safety codes as well as the National Electrical Code (NEC) in the United States and the Canadian Electrical Code (CEC) in Canada. 4. Unit must be securely grounded (bare metal) to a suitable electric ground, such as a grounded water pipe or ground wire system. 5. Do not kink power cable or allow it to come in contact with sharp objects, oil, grease, hot surfaces or chemicals. Replace damaged cords immediately. 6. Make certain that the power source conforms to the requirements for the equipment. 7. Never open access door to a duct with the ventilator running. 2RB84A 2RB85A Min./Max. RPM 1250/ /1550 Max. Inlet Temp. 105 F 105 F Volts/Hertz/Phase 115/60/1 115/60/1 Min. Circuit Amps Motor HP 1/4 1/3 Motor RPM 1250/ /1550

5 J H N M Figure 1 FRONT VIEW D BACK VIEW F E G Side B Side A G E F Discharge Side A K D P Q 2RB84A L Discharge Side B A FRONT VIEW R Discharge Side A Side A 2RB85A Motor Type Permanent Split Capacitor Permanent Split Capacitor Motor Enclosure Open Dripproof Open Dripproof Motor Nominal Efficiency 60% 65.7% NEMA Frame Size Speed Control 48C172 (2 Required) 48C173 (2 Required) Mounting Location Indoor Indoor Agency Compliance ETL US/Canada ETL US/Canada Dimensions (inches) A B C D E 8 10 F G 6 7 H J K L M N P Q Filter Size 14 x 20 x 1 16 x 20 x 1 Filter Qty. 2 2 Discharge Side B BACK VIEW B Side B C 3 GETTING STARTED OPERATION TROUBLESHOOTING

6 GETTING STARTED INSTRUCTIONS Discharge Side A Installation, troubleshooting and parts replacement are to be performed only by qualified personnel. Consult and follow NFPA 96 recommendations. NFPA 96 instructions supersede this document. NOTE: The system design and installation should follow accepted industry practice, such as described in the ASHRAE Handbook and SMACNA. Access Panels: Removable panels enable easy access to filters and energy recovery wheel for maintenance. 1. Access panel 1 (Figure 2) allows access for: a. Outdoor and exhaust fans and motor b. Electrical connection 2. Access panel 2 (Figure 2) allows access for: 1 a. Energy wheel cassette b. Internal filters Discharge Side B Side B Cassette TROUBLESHOOTING OPERATION Figure 2 Figure 3 Minimum service clearances should be provided on the sides of the unit for routine service and component removal should it become necessary. Recommended service clearances for component removal are displayed in the table below and Figure 3. 4 Side A Cassette Slides Out 2 And Discharge Locations: 2RB84A 2RB85A A (inches) B (inches) B and discharge locations are shown in Figure 4 and Figure 5. Both intake locations are capable of being field relocated to suit installation needs (optional locations noted). A

7 Side A (Optional) Discharge Side B GETTING STARTED Side B Discharge Side A Side A Figure 4 Figure 5 1. To change the intake location remove the metal cover for optional intake by unfastening the (4) sheet metal screws holding it in place. 2. Hand bend flanges out to form a duct collar in the newly uncovered intake opening. 3. Hand bend flanges in on original intake and replace metal cover removed in step 1. Cover Duct Cover Side B (Optional) Figure 6 Figure 7 A Mounting Options: NOTE: The hanging and base mounting brackets are fastened to the same unit corners. 1. Mount using appropriate hanging vibration isolators. Hanger mounting brackets are factory installed. a. Locate appropriate sized threaded rod (by others). b. Follow vibration isolator manufacturer s installation instructions. B C 2RB84A 2RB85A A (inches) Electrical and Fan Access Panel B (inches) (underside) C (inches) Threaded Rod Size (inches) 3/8 1/2 OPERATION TROUBLESHOOTING Electrical and Fan Access Panel (underside) 5

8 GETTING STARTED 2. Mount using appropriate base vibration isolators. Mounting brackets are factory installed. a. Rotate ventilator 180º, so the electrical and fan component panel is accessible from the top. The corners where the brackets are fastened, are now closest to the mounting surface. b. Follow vibration isolator manufacturer s installation instructions. Electrical and Fan Access Panel (underside) TROUBLESHOOTING OPERATION 6 Figure 8 DUCT CONNECTIONS: Recommended discharge duct size and length and examples of good and poor fan-to-duct connections are shown in the table below and Figure 8. Airflow out of the fan should be directed straight or curve the same direction as the fan wheel rotates. Poor duct installation will result in low airflow, loud noise and excessive vibrations. 2RB84A 2RB85A Duct Size (inches) 10 x 8 10 x 10 Straight Duct Length (inches) Figure 9 4 x Wheel Diameter Less than 4 x Wheel Diameter ELECTRICAL CONNECTIONS: POOR GOOD GOOD Before connecting power to the unit, read and understand the following instructions and wiring diagrams. Complete wiring diagrams are attached inside the blower panel of the unit. All wiring should be done in accordance with the National Electrical Code ANSI/NFPA 70 latest edition and any local codes that may apply. In Canada, wiring should be done in accordance with the Canadian Electrical Code. The equipment must be properly grounded.

9 If any of the original wire must be replaced, the replacement wire must have a temperature rating of at least 105ºC. High voltage electrical input is required for this equipment. This work should be performed by a qualified electrician. 1. Sequence for wiring energy recovery unit: a. The unit s nameplate contains the voltage and total amperage required. The wire supplying power to the unit should be sized accordingly. b. The main power line should be connected to the appropriate terminal blocks. Power may be routed to the ventilator through the opening on the underside of the unit. See table and Figure 10 for opening location. GETTING STARTED B Electrical Connection A 2RB84A 2RB85A A (inches) B (inches) Figure 10 Wheel and Filter Access c. Refer to the wiring diagram below (Figure 11) or in the unit for controlling the ventilator. (VERIFY MAIN UNIT POWER ON UNIT NAMEPLATE) MAIN UNIT POWER -115/208/230/60/1 L2 L1 GROUND L2 SEE NOTE#2 L1 A BLOWER A SPEED CONTROLLER ON OFF A2 BLACK BLACK BLACK M1 MA ENERGY WHEEL MOTOR BLOWER MOTOR A OPERATION TROUBLESHOOTING Figure 11 SEE NOTE#2 B BLOWER B SPEED CONTROLLER ON OFF B2 BLACK MB BLOWER MOTOR B 7

10 GETTING STARTED OPERATING INSTRUCTIONS System Startup: For proper unit function and safety, follow everything in this startup procedure in the order presented. Startup is to be done after electrical connections are complete. Do not operate without the filters and birdscreens installed. They prevent the entry of foreign objects such as leaves, birds, etc. Use caution when removing access panels or other unit components, especially while standing on a ladder or other potentially unsteady base. Access panels and unit components can be heavy and serious injury may occur. void warranty. Do not run unit during construction phase. Damage to internal components may result and Unit was factory tested. All blowers, fans, and compressors are set-up to run correctly when supplied power. If any one fan is running backwards or the compressor is making loud noises, immediately turn off the power. Switch two leads on the incoming power to the disconnect. This will ensure proper operation of the unit. Failure to comply may damage the compressors and void the warranty. Do not jumper any safety devices when operating the unit. This may damage components within or cause serious injury or death. OPERATION TROUBLESHOOTING 8 1. Check all fasteners and set screws for tightness. This is especially important for bearings and fan wheels. Also, if dampers are not motorized, check that they open and close without binding. 2. Before starting the unit, compare the supplied voltage with the unit s nameplate voltage and the motor voltage. 3. Check that the energy recovery wheel rotates freely and is in good condition. a. Disconnect power to the ventilator. Remove access panel labeled Energy Wheel Cassette Access. Unplug the wheel drive motor and pull the energy recovery cassette halfway out of the unit. b. Turn the energy recovery wheel by hand to verify free operation. Check that the air seals, located around the outside of the wheel and across the center (both sides of wheel), are secure and in good condition. c. Air seals which are too tight will prevent proper rotation of the energy recovery wheel. Recheck the air seals for tightness. Air seal clearance may be checked by placing a sheet of paper, like a feeler gauge, against the wheel face. To adjust the air seals, loosen 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 the sheet of paper as the wheel is turned.

11 d. Replace cassette into unit, plug in wheel drive, replace access door and apply power. Observe that the wheel rotates freely. If wheel does not rotate or is binding remove the cassette, refer to Maintenance step 4b. 4. Hand rotate the blower to ensure that the wheel is not rubbing against the scroll. If the blower is rotating in the wrong direction, the unit will move some air but not perform properly. To check the rotation, open the blower access panel, which is labeled either supply or exhaust, and run the blower momentarily to determine the rotation. See Figure 12. Rotation Airflow GETTING STARTED Figure Along with the building balance, the unit s air flow (cfm) should be measured and compared with its rated air volume. The ventilator is direct drive, therefore balancing dampers or speed controls are required for air flow balancing. Air volume measurement must be conducted with access doors on the unit. a. The most accurate way to measure the air volume is by using the pitot traverse method in the ductwork away from the blower. Other methods can be used but should be proven and accurate. b. To adjust the air volume, change the fan rpm or the system static pressure. See Troubleshooting Section in this guide. 6. Measure motor voltage, amperage and fan rpm. a. All access doors must be installed. Run the measurement leads through the provided electrical access hole in the bottom access panel of the ventilator. Measure and record the input voltage and motor amperage(s). b. To measure the fan rpm, the blower door will need to be removed. Minimize measurement time because the motor may overamp with the door removed. Do not operate units with access doors/panels open as the motors will overload. c. With all access panels installed, compare measured amps to the motor nameplate full load amps and correct if overamping. OPERATION TROUBLESHOOTING 9

12 GETTING STARTED TROUBLESHOOTING OPERATION TROUBLESHOOTING GUIDE Symptom Possible Cause(s) Corrective Action Unit is not operating 1. Electrical 1. Check fuses/circuit breakers, replace if needed. Check for On/ Off switches. Check for correct supply voltage. Excessive noise Motor 2. Check that motor horsepower is correct and not tripping overloads. 1. Fan wheel rubbing on inlet 1. Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft. 2. Bearings 2. Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners. 3. Wheel out of balance 3. Clean, replace or rebalance. Low airflow (cfm) 1. Fan speed too low 1. Check for correct rpm with catalog data. 2. Fan wheels are operating backwards 3. Dirty filters or energy wheel 2. Refer to Operating Instructions step 4 for blower wheel rotation. 3. Replace filters and/or follow the cleaning procedures. 4. High static pressure 4. Incorrect fan-to-duct connections. Make sure dampers open appropriately. Increase fan speed. High airflow (cfm) 1. Fan speed too high 1. Check for correct fan rpm. Energy wheel does NOT turn Energy wheel runs intermittently 2. Low static pressure 2. Make sure grilles, filters and access doors are installed. Decrease fan speed. 1. Air seals too tight 1. Refer to Operating Instructions step No power to wheel motor 2. Make sure wheel drive is plugged in/connected. Verify power is available. 3. Wheel drive belt 3. Check for loose or broken belts. Replace belts; consult factory. Wheel motor overloads are tripping due to rubbing between wheel and air seals. Recheck air seals, make sure they are not too tight.

13 MAINTENANCE Disconnect all electrical power to the ventilator prior to inspection or servicing. Failure to comply with this safety precaution could result in serious injury or death. GETTING STARTED Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment. After the ventilator has been put into operation, an annual inspection and maintenance program should be set up to preserve reliability and performance. 1. General Maintenance The energy recovery ventilator requires very little maintenance. However, small problems left unchecked, over time, could lead to loss of performance or early motor failure. We recommend that the unit be inspected once or twice a year. The motor should be checked for lubrication at this time. Lubricate only those motors which have an oil hole provided. A few drops of allpurpose oil (SAE 20) will be sufficient. 2. Fasteners and Set Screws Maintenance Any fan vibration has a tendency to loosen mechanical fasteners. A periodic inspection should include checking all fasteners and set screws for tightness. Particular attention should be paid to set screws attaching the blower wheel to the shaft and the shaft to the bearings. Loose bearing set screws will lead to premature failure of the blower shaft. 3. Internal Filter Maintenance Opening the access panels labeled Filter Access provides access to the 1 inch deep, pleated 30% efficient air filters. These filters should be checked regularly and replaced as needed. 4. Energy Wheel Maintenance A regular cleaning cycle must be established for the energy recovery wheel in order to maintain optimum sensible and latent energy transfer. In reasonably clean environments such as schools, offices, or retail stores, the energy recovery wheel should be inspected annually and cleaned as needed. For applications experiencing unusually high levels of tobacco smoke, such as lounges, nightclubs, bars, and restaurants, washing of the energy recovery wheel every three months may be necessary to maintain latent energy (water vapor) transfer efficiency. NOTE: Failure to follow a regular cleaning cycle for the energy recovery wheel can result in significant energy transfer performance losses. 11 OPERATION TROUBLESHOOTING

14 GETTING STARTED TROUBLESHOOTING OPERATION a. Disconnect power to the ventilator. Remove access panel labeled Energy Wheel Cassette Access. Unplug the wheel drive motor and pull the cassette halfway out. b. To remove the energy recovery wheel, first, remove the drive belt and the collars on both bearings. On the pulley side of the cassette, remove the (4) fasteners that hold the bearing support channel in place. Once the bearing support is removed, the wheel can be pulled from the cassette. To replace the wheel, reverse this procedure. c. When cleaning energy recovery wheels, wash the segments or small wheels with a non-acid based (evaporator) coil cleaner or alkaline detergent solution, such as 409 or Fantastik. Nonacid based coil cleaner such as KMP Acti-Clean AK-1 concentrate in a 5% solution has been demonstrated to provide excellent results. IMPORTANT: Do not use acid based cleaners, aromatic solvents, temperatures in excess of 140 F or steam; damage to the wheel may result. Soak in the cleaning solution until dirt, grease, and/or tar deposits are loosened. Internal heat exchange surfaces may be examined by separating the polymer strips by hand. NOTE: Some staining of the desiccant may remain and is not harmful to performance. After soaking, rinse the dirty solution from the wheel until the water runs clear. Allow excess water to drain from the media prior to reinstalling the wheel in the cassette. A small amount of water remaining in the wheel will be dried out by the airflow. d. Drive belt(s) should be inspected annually. Normal operation eventually causes stretching or wear on the belt(s). Once this occurs, the belt(s) should be replaced. 12

15 PARTS ILLUSTRATION FOR ENERGY RECOVERY VENTILATORS GETTING STARTED PARTS LIST FOR ENERGY RECOVERY VENTILATORS Ref. No. Description For Repair Parts, call Grainger 24 hours a day 365 days a year Please provide following information: -Model number -Serial number (if any) -Part description and number as shown in parts list Part Number for Models: 2RB84A 2RB85A 1 Blower Assembly 21DP48 21DP Blower Motor 21DV64 21DP Filters 5W891 2W Wheel Cassette 21DP47 21DP Wheel Belt 21DP46 21DP Wheel Motor 21DP45 21DP45 1 Qty. 13 OPERATION TROUBLESHOOTING

16 DAYTON ONE-YEAR LIMITED WARRANTY DAYTON ONE-YEAR LIMITED WARRANTY. All Dayton product models covered in this manual are warranted by Dayton Electric Mfg. Co. ( Dayton ) to the original user against defects in workmanship or materials under normal use for one year after date of purchase. If the Dayton product is part of a set, only the portion that is defective is subject to this warranty. Any product or part which is determined to be defective in material or workmanship and returned to an authorized service location, as Dayton or Dayton s designee designates, shipping costs prepaid, will be, as the exclusive remedy, repaired or replaced with a new or reconditioned product or part of equal utility or a full refund given, at Dayton s or Dayton s designee s option, at no charge. For limited warranty claim procedures, see Warranty Service below. This warranty is void if there is evidence of misuse, mis-repair, mis-installation, abuse or alteration. This warranty does not cover normal wear and tear of Dayton products or portions of them, or products or portions of them which are consumable in normal use. This limited warranty gives purchasers specific legal rights, and you may also have other rights which vary from jurisdiction to jurisdiction. WARRANTY DISCLAIMERS AND LIMITATIONS OF LIABILITY RELATING TO ALL CUSTOMERS FOR ALL PRODUCTS LIMITATION OF LIABILITY. TO THE EXTENT ALLOWABLE UNDER APPLICABLE LAW, DAYTON S LIABILITY FOR CONSEQUENTIAL AND INCIDENTAL DAMAGES IS EXPRESSLY DISCLAIMED. DAYTON S LIABILITY IN ALL EVENTS IS LIMITED TO AND SHALL NOT EXCEED THE PURCHASE PRICE PAID. WARRANTY DISCLAIMER. A DILIGENT EFFORT HAS BEEN MADE TO PROVIDE PRODUCT INFORMATION AND ILLUSTRATE THE PRODUCTS IN THIS LITERATURE ACCURATELY; HOWEVER, SUCH INFORMATION AND ILLUSTRATIONS ARE FOR THE SOLE PURPOSE OF IDENTIFICATION, AND DO NOT EXPRESS OR IMPLY A WARRANTY THAT THE PRODUCTS ARE MERCHANTABLE, OR FIT FOR A PARTICULAR PURPOSE, OR THAT THE PRODUCTS WILL NECESSARILY CONFORM TO THE ILLUSTRATIONS OR DESCRIPTIONS. EXCEPT AS PROVIDED BELOW, NO WARRANTY OR AFFIRMATION OF FACT, EXPRESSED OR IMPLIED, OTHER THAN AS STATED IN THE LIMITED WARRANTY ABOVE IS MADE OR AUTHORIZED BY DAYTON. PRODUCT SUITABILITY. MANY JURISDICTIONS HAVE CODES AND REGULATIONS GOVERNING SALES, CONSTRUCTION,, AND/OR USE OF PRODUCTS FOR CERTAIN PURPOSES, WHICH MAY VARY FROM THOSE IN NEIGHBORING AREAS. WHILE ATTEMPTS ARE MADE TO ASSURE THAT DAYTON PRODUCTS COMPLY WITH SUCH CODES, DAYTON CANNOT GUARANTEE COMPLIANCE, AND CANNOT BE RESPONSIBLE FOR HOW THE PRODUCT IS INSTALLED OR USED. BEFORE PURCHASE AND USE OF A PRODUCT, REVIEW THE SAFETY/, AND ALL APPLICABLE NATIONAL AND LOCAL CODES AND REGULATIONS, AND BE SURE THAT THE PRODUCT,, AND USE WILL COMPLY WITH THEM. CONSUMERS ONLY. CERTAIN ASPECTS OF DISCLAIMERS ARE NOT APPLICABLE TO CONSUMER PRODUCTS SOLD TO CONSUMERS; (A) SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU; (B) ALSO, SOME JURISDICTIONS DO NOT ALLOW A LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU; AND (C) BY LAW, DURING THE PERIOD OF THIS LIMITED WARRANTY, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE APPLICABLE TO CONSUMER PRODUCTS PURCHASED BY CONSUMERS, MAY NOT BE EXCLUDED OR OTHERWISE DISCLAIMED. THIS LIMITED WARRANTY ONLY APPLIES TO UNITED STATES PURCHASERS FOR DELIVERY IN THE UNITED STATES. WARRANTY SERVICE To obtain warranty service if you purchased the covered product directly from W.W. Grainger, Inc. ( Grainger ), (i) write or call or visit the local Grainger branch from which the product was purchased or another Grainger branch near you (see for a listing of Grainger branches); or (ii) contact Grainger by going to and clicking on the Contact Us link at the top of the page, then clicking on the us link; or (iii) call Customer Care (toll free) at To obtain warranty service if you purchased the covered product from another distributor or retailer, (i) go to for Warranty Service; (ii) write or call or visit a Grainger branch near you; or (iii) call Customer Care (toll free) at In any case, you will need to provide, to the extent available, the purchase date, the original invoice number, the stock number, a description of the defect, and anything else specified in this Dayton One-Year Limited Warranty. You may be required to send the product in for inspection at your cost. You can follow up on the progress of inspections and corrections in the same ways. Title and risk of loss pass to buyer on delivery to common carrier, so if product was damaged in transit to you, file claim with carrier, not retailer, Grainger or Dayton. For warranty information for purchasers and/or delivery outside the United States, please use the following applicable contact information: Dayton Electric Mfg. Co., 100 Grainger Parkway, Lake Forest, IL U.S.A. or call DM_US