ERMS ENERGY RECOVERY MODULE FOR STERLING UNITS INSTALLATION OPERATING & MAINTENANCE INSTRUCTIONS
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INSTALLATION 1 - Place gasket on the top perimeter flange of the curb. 2 - For Downflow units: Place gasket on the duct support flanges around the downflow duct openings. 3 - Place the ERV on the curb. Make sure the duct openings on downflow units align with the duct openings in the curb. 4 - Connect power and control wiring to the ERV. See the wiring diagram. Provide disconnect means and overload protection as required by job conditions.
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SEQUENCE OF OPERATION STANDARD OPERATION When the indoor fan motor of the HVAC equipment is energized, the 24vac control relay in the ERV will be energized. The contactors for the supply fan, exhaust fan and energy wheel will be activated and the ERV will begin operation. When the HVAC unit indoor fan motor is de-energized, the 24vac control relay in the ERV will be deenergized. The contactors for the supply fan, exhaust fan and energy wheel will be deactivated and the ERV will stop operation.
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Last Reviewed 6/28/06 Cleaning Airxchange Wheels Overview All air-to-air energy recovery devices will get dirty over time, even with well-maintained filtration. One advantage Rotary wheel technology has over fixed exchangers is the ability to ‘self clean’ of dry dust and dirt by rotating between two opposing airstreams traveling from 500-800 fpm.
SERIES 36 thru SERIES 86 INSTALLATION OPERATING & MAINTENANCE INSTRUCTIONS • • • Health Comfort Energy Efficiency ENERGY RECOVERY CASSETTE MODELS ERC-3615, ERC-3623, ERC-3625 ERC-4639, ERC-5230, ERC-5245, ERC-5255 ERC-5860, ERC-6445, ERC-6475, ERC-7460 ERC-7490, ERC-86170 The Airxc hange Ener gy Recovery Cassette consists of a fr ame, wheel, wheel drive system and energy transfer segments. Segments are r emovable for cleaning or replacement.
SPECIFICATIONS SERIES 36 thru SERIES 86 The Models ERC-36 through ERC-86 Series cassette frames are constructed of heavy gauge G90 galvanized steel. The wheel assembly and segment frames are stainless steel. With the exception of replaceable drive motors, belts and segments, the cassette has a minimum design life of 20 years. DIMENSIONS SERIES A B C D E F G ERC-36 39.82 39.82 2.86 18.48 4.36 1.31 2.
ERC-5860 PERFORMANCE Wheel effecti veness, airflow and pressure drop are determined by the selection of energy transfer segments whic h provide a wide range of performance characteris tics for any given wheel size as outlined in the charts below. ERC-5230 ERC-3615 CFM EFF •P CFM EFF •P 800 900 1000 1100 1200 1300 1400 1500 1600 1700 86 85 85 84 83 82 82 81 80 79 0.51 . 057 0.63 0.70 0.76 0.82 0.89 0.95 1.01 1.08 1600 1800 2000 2200 2400 2600 2800 3000 3500 3900 86 86 85 84 84 83 82 81 80 79 0.
Fig ure 2 Figure 1 Lifting Hole Locations DESIGN CONSIDERA TIONS CONSIDERATIONS Energy recovery cassettes can be incorporated within the design of packaged rooftop units, packaged airhandlers, energy recovery ventilators, or site built air handling systems. In each case, it is recommended that the following considerations be addressed Accessibility The cassette and all its operative parts; i.e.
machine shop areas for example, annual washing of energy transfer may be necessary to maintain latent transfer efficiency. Proper cleaning of the energy recovery wheel will restore latent effectiveness to near original performance. frame and segment retainers are completely fastened. (See Figure 4 page 6). 3. 4. 5. With hands and objects away from moving parts, acti vate uni t and confirm wheel rotation. W heel rotates cloc kwise (as viewed from the pulley side).
Figure 4 Segment Retainer Series 36 through 74 To install wheel segments follow steps one through five below. (See Fig. 5). Reverse procedure for segment removal. 1. Unlock two segment retainers (one on each side of the selected segment opening. 2. With the embedded stiffener facing the motor side, insert the nose of the segment between the hub plates.
3. Using s ocket wrench with extension, remove two nuts which secure bearing housing to the bearing support beam. Sli de bearing from shaft. Note: Slight hand pressure against wheel rim will lift weight of wheel from inner race of bearing to assist bearing remov al and in stall tion. If not removable by hand, use bearing puller. Slowly rotate the wheel 180º. Install the second segment opposite the first for counterbalance.
Alternate Belt Replacement Methods Alternate belt replacement metho ds may be used in some appli cations depending upon accessibility of the cassette. Consult i nstructions provided with the belt for further information. REPLACEMENT PARTS Product Label How to Order Refer to the parts list and exploded view on pages 10 through 15 to obtai n replacement part numbers. Contact your equipment manufacturer for parts service. Order by Part Number.
ILLUSTRATED PARTS BREAKDOWN FOR ENERGY RECOVERY CASSETTES SERIES ERC-36 ERC-46 ERC-52 ERC-58 ERC-64 ERC-74 ERC-86 9 Page Page21 19ofof28 26
ILLUSTRATED PARTS BREAKDOWN FOR 36 & 52 SERIES ENERGY RECOVERY CASSETTES ITEM QTY DESCRIPTION ERC-3615 ERC-3623 ERC-3625 ERC-5230 ERC-5245 ERC-5255 2 2 Cover – Bearing NA NA NA 181778 181778 181778 5 2 Bearing – Wheel w/collar 181715 181715 181715 181715 181715 181715 8 1 Dia. Seal Assembly 181629 181629 181629 181725 181725 181725 9 1 Dia. Seal Assembly 181630 181630 181630 181724 181724 181724 10 1 Dia.
SERIES ERC-36 & ERC-52 Figure 9 11 Page Page23 21ofof28 26
ILLUSTRATED PARTS BREAKDOWN FOR 64 & 74 SERIES ENERGY RECOVERY CASSETTES ITEM QTY PER 2 2 3 DESCRIPTION ERC-6445 ERC-6475 ERC-7460 ERC-7490 Cover – Bearing 18640035 18640035 18740035 18740035 2 Bearing – W heel w/collar 18640036 18640036 18740019 18740019 8 2 Seal Assembly – Diameter 18640014 18640014 18740022 18740022 9 2 Seal Assembly – Diameter 18640013 18640013 18740015 18740015 11 1 Dia.
SERIES ERC-64 & ERC-74 Figure 10 13 Page Page25 23ofof28 26
ILLUSTR ATED PARTS BREAKDOWN FOR 46, 58 & 86 SERIES ENERGY RECOVERY CASSETTES ITEM QTY PER 2 2 5 DESCRIPTION ERC-4639 ERC-5860 ERC-86170 Cover – Bearing 181778 18580035 18860035 2 Bearing – Wheel w/collar 181715 18640036 18860019 8 2 Seal Assembly – Diameter 18460014 18580014 18860014 9 2 Seal Assembly – Hub 18460013 18580013 18860013 10 2 Seal Assembly – Diameter 18460026 18580026 18860026 11 1 Diameter Seal Insert Set (8/ set) 18460015 18580015 18860015 13 1 Sha
Series ERC-46, ERC-58 & ERC-86 Figure 11 15 Page Page27 25ofof28 26
PRODUCT IDENTIFICATI ON Fill in the information below for a permanent record of equipment installed on the job site. Model Number and Serial Number for the Energy Recov ery Cassettes are desi gnated on the c assette’s Product Label located next to the drive pulley. Information contai ned i n the required section of the information box to the right must be provided when ordering service parts for the energy recovery cassette.
