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Instruction Manual for RenewAire models including: CA SERIES ERV Energy Recovery Module, CA SERIES ERV, Energy Recovery Module, ERV, Recovery Module, Module, CA Module, CA2XRT, CA3XRT, CA4XRT
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DocumentDocumentCA SERIES ERV Installation, Operation and Maintenance Manual CA2XRT CA3XRT CA4XRT CA3XRT shown ERV CA-Series Rooftop WARNING RISK OF FIRE, ELECTRIC SHOCK, OR INJURY. OBSERVE ALL CODES AND THE FOLLOWING: 1. Before serviceing or cleaning the unit, switch power off at system disconnect switch or service panel and lock-out/ tag-out to prevent power from being switched on accidentally. More than one disconnect switch may be required to de-energize the system for servicing. 2. This installation manual shows the suggested installation method. Additional measures may be required by local codes and standards. 3. Installation work and electrical wiring must be done by qualified professional(s) in accordance with all applicable codes, standards, and licensing requirements. 4. Any structural alterations necessary for installation must comply with all applicable building, health, and safety code requirements. 5. Electrical equipment connected to this unit must be properly grounded. 6. Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel burning equipment that might be installed in the area affected by this equipment. If this unit is exhausting air from a space in which chimney-vented fuel burning equipment is located, take steps to assure that combustion air supply requirements of applicable codes and standards. 7. Use the unit only in the manner intended by the manufacturer. If you have questions, contact the manufacturer. 8. This unit is intended for general ventilating only. Do not use to exhaust hazardous or explosive materials and vapors. Do not connect this unit to range hoods, fume hoods, or collection systems for toxics. 9. This unit must be properly ducted to the outdoors. Outside air inlets must not be located where air may be contaminated, for example by vehicle or appliance exhausts. CAUTION Tape both inner and outer vapor barriers of insulated duct to collars on duct adapters. This is critical to prevent migration of moisture into insulation. Build-up of moisture can result in failure of the duct system and/or frost in the insulation. Make sure any tears in the inner and outer vapor barriers are sealed. CAUTION Provide Adequate Service Access for Maintenance The CA-Series Rooftop cabinet will require regular filter and core inspections. Install the CA-Series Rooftop cabinet where you can remove the doors for cleaning the core and replaceing the filters, and where you can get at the wiring for installation and service. WARNING The unit's outside air inlet should be at least 10' away from any exhaust, such as dryer vents, chimneys, furnace, and water heater exhausts, or other sources of contamination or carbon monoxide. Do not locate the outside air intet where vehicles may be serviced or left idling. Never locate the unit inside a structure. WARNING Danger of damage or severe injury if high winds move this unit. Secure unit to structure. Observe local code requirements at a minimum. WARNING Danger of injury if unit started unexpectedly. Switch power off at service disconnect. Lock-out/tag-out the disconnect. CAUTION Maximum Differential Pressure The maximum pressure differential between the two airstreams shound not exceed 4 inches (H2O). CAUTION It is the installer's responsibility to make sure that the screws or bolts used for securing the units are properly selected for the loads and substrates involved. Secure the CA24XRT so that it cannot fall or tip in the event of an accident, structural failure, or earthquake. See the Rigging Information section for unit weight. RenewAire strongly recommends that you secure rooftop units properly to the building structure. Strong winds, tornados, and hurricanes can and do displace or remove rooftop equipment from rails or curbs. When this happens, the equipment, adjacent roof structure, and even vehicles parked near the building can be damaged, and rain typically enters the building. The equipment is put out of service and the collateral damage can be very expensive. CAUTION Filters must be used or the energy exchanger core will become blocked by dust and the unit will not do its job. In extreme cases components may be damaged. CAUTION Do Not Wash the Energy Exchange Core. Keep it away from water or fire to avoid damaging it. Always handle the core carefully. 2 1.800.627.4499 CA-Series Rooftop OWNER INFORMATION ERV SAVE THIS MANUAL UNIT INFORMATION Record information as shown below. In the unlikely event that factory assistance is ever required, information located on the unit label will be needed. Locate the RenewAire unit label found on the outside of the unit. NOTE: This information is for purposes of identifying the unit-specific option data from the Option Code. OPTION CODE: CA- XJRT SERIAL NUMBER: -- - - - - - - - - - -N SO #: NOTE: This page is to be completed by the installing contractor. The completed document is to be turned over to the owner after start-up. Energy Recovery Ventilator This space left blank intentionally. Label No: 134784_002 UNIT INFORMATION Option Code: CA-4XJRT--S-------------N MODEL/MODELE: CA4XRT SO#: 063585 JO#: 35920-0000 Serial Number: J19 4987 UNIT LABEL (TYPICAL) 1.800.627.4499 3 CA OUTDOOR Energy Recovery Module ROOFTOP UNITS Modular Cabinets SPECIFICATIONS Ventilation Type: Static plate, heat and humidity transfer Standard Features: Insulated sheet metal cabinets with energy exchange cores and filters. Blower not included and must be specified to meet job requirements. Insulation: One inch, high density, FSK faced, fiberglass Options: Double wall construction Exterior paint - white, custom colors Accessories: Roof curb - standard 14" Filters - MERV 13, 2" (shipped loose) Thermal Performance Ratings G5 2015.2.xlsx Description Typical Airflow Range CFM Download specification at: renewaire.com/specifications AHRI 1060 Certified Core Unit Dimensions & Weight Max. Shipping Dimensions & Weight (on pallet) Filters: MERV 8: Thermal Performance Ratings G5 2015.2.xls2x0" x 20" x 2" 2 CoresCA(I2OXMRT) 500-2,200 Two L125-G5 55 1/2" L x 43 1/4" W x 42 1/4" H 250-329 lbs. 63" L x 47" W x 48" H 400 lbs. 3 CoreTosta(IlOqtMy. )4 CA3XRT 750-3,300 Three L125-G5 55 1/2" L x 63 1/2" W x 42 1/2" H 377-482 lbs. 60" L x 90" W x 48" H 590 lbs. Total qty. 6 CA4XRT 1,000-4,400 Four L125-G5 55 1/2" L x 83 1/4" W x 42 1/4" H 462-593 lbs. 60" L x 90" W x 48" H 700 lbs. Total qty. 8 AIRFLOW PERFORMANCE CORE PERFORMANCE Airflow (CFM) 2.0 500 1.5 90% 1.0 Thermal Performance Ratings G5 2015.2.xlsx 70% Airflow (CFM) 1000 1500 2000 4 Cores (IOM) Effectiveness (%) 0.5 0.0 0 1000 2000 3000 4000 Note: Airflow performance includes effect of clean, standard filter supplied with unit. 50% 30% CA2XRT 500 90% Airflow (CFM) 1000 1500 2000 2500 3000 3500 Effectiveness (%) 70% 50% 30% CA3XRT Airflow (CFM) 1000 90% 2000 3000 4000 Effectiveness (%) 70% 50% 30% CA4XRT At AHRI 1060 standard conditions. See all AHRI certified ratings at www.ahrinet.org. Static Presure Drop (in.w.g) 4 1.800.627.4499 4" Typ. 35 1/2" Minimum Service Area 32 5/8" O.D. CA2XRT Energy Recovery Module Alternate Hood Location. If hood location switched, plug existing mounting holes on opposite side of unit to prevent leakage. 24" X 10" Floor Opening Typ. CL 20 1/4" Typ. 33 7/8" Minimum Service Area Door Swing CURB CA2XRT 37 5/8" O.D. A A FA RA CL 25 7/8" 55 1/2" Overall 35 1/2" Case CL 9 1/2" TOP VIEW 5 3/4" 26 1/4" I.D. 33 7/8" I.D. TOP VIEW 43 1/4" Overall 41 3/4" Case 37 5/8" Lifting Lugs 2" Typ. OA Hood can be mounted to either side of unit 35 3/4" Lifting Lugs 1 7/8" 12 5/8" I.D. 28 7/8" I.D. ABBREVIATIONS EA: Exhaust Air to outside OA: Outside Air intake RA: Room Air to be exhausted FA: Fresh Air to inside INSTALLATION ORIENTATION Unit must be installed in orientation shown. NOTE 1. UNLESS OTHERWISE SPECIFIED, DIMENSIONS ARE ROUNDED TO THE NEAREST EIGHTH OF AN INCH. 2. SPECIFICATIONS MAY BE SUBJECT TO CHANGE WITHOUT NOTICE. CURB CROSS-SECTION A-A (TYP.) 1 1/2" X 1/4" Neoprene Gasket 1 7/8" 14" 3/4" X 3 1/2" Wooden Nailer 3" SECTION A-A 24 1/8" Typ. Typ. 25 1/4" 10" 42 1/4" Overall 39 1/8" Case Typ. 8 1/8" Typ. Floor pan inlets/outlets are open by default; These can be patched from inside the unit with removeable insulated pans from the side openings, if unused. LEFT VIEW AIRFLOW CONFIGURATION MDroaAvdwaielainbl:lgeCaTsAys2hpoXewRn: TiUn ndimiteDnsiimon edrnawsiinogn. Version: MAY16 Pressure Ports (4) Typ. Note: Pleated, disposable 20" X 20" X 2" filters are provided for installation and are interchangeable based on your airflow path requirements. Filters are to be mounted upstream to the core in the direction of airflow entering the unit. FRONT VIEW Lower side pan inlets/outlets are patched with removable insulated pans. RIGHT VIEW UNIT MOUNTING & APPLICATION Must be mounted as shown. Duct configuration is field convertible. Weather hood can be moved in the field. RA/EA airstream can be switched with OA/FA airstream. 1.800.627.4499 5 6 1.800.627.4499 5" Typ. 35 1/2" Minimum Service Area 32 5/8" O.D. 35 1/2" Case CL 26" CA3XRT Energy Recovery Module 36" X 10" Floor Opening Typ. Alternate Hood Location. If hood location switched, plug existing mounting holes on opposite side of unit to prevent leakage. CL 30 1/4" Typ. 33 3/4" Minimum Service Area Door Swing CURB CA3XRT 57 1/2" O.D. 53 3/4" I.D. A A FA RA 55 1/2" Overall CL 9 1/2" 9 5/8" 38 1/4" I.D. TOP VIEW TOP VIEW 63 3/8" Overall 61 1/2" Case 2" Typ. 57 5/8" Lifting Lugs OA Hood can be mounted to either side of unit 35 3/4" Lifting Lugs 12 3/8" I.D. 1 7/8" 28 7/8" I.D. ABBREVIATIONS EA: Exhaust Air to outside OA: Outside Air intake RA: Room Air to be exhausted FA: Fresh Air to inside INSTALLATION ORIENTATION Unit must be installed in orientation shown. NOTE 1. UNLESS OTHERWISE SPECIFIED, DIMENSIONS ARE ROUNDED TO THE NEAREST EIGHTH OF AN INCH. 2. SPECIFICATIONS MAY BE SUBJECT TO CHANGE WITHOUT NOTICE. CURB CROSS-SECTION A-A (TYP.) 1 1/2" X 1/4" Neoprene Gasket 1 7/8" 14" 3/4" X 3 1/2" Wooden Nailer 3" SECTION A-A 36 1/8" Typ. 10" Typ. 24 7/8" Typ. 42 1/4" Overall 39 1/4" Case 12" Typ. Floor pan inlets/outlets are open by default; These can be patched from inside the unit with removeable insulated pans from the side openings, if unused. LEFT VIEW MDroadwAAeviInalR:ilgaFCbLlTeAyOa3psWXsehRo:CTwUOnniNnitdFiDmIGiemnUsieRonnAdsTriaoIwOninNg. Version: MAY16 Pressure Ports (4) Typ. Note: Pleated, disposable 20" X 20" X 2" filters are provided for installation and are interchangeable based on your airflow path requirements. Filters are to be mounted upstream to the core in the direction of airflow entering the unit. FRONT VIEW Lower side pan inlets/outlets are patched with removable insulated pans. RIGHT VIEW UNIT MOUNTING & APPLICATION Must be mounted as shown. Duct configuration is field convertible. Weather hood can be moved in the field. RA/EA airstream can be switched with OA/FA airstream. CA4XRT Energy Recovery Module 35 1/2" Minimum Service Area 12 5/8" I.D. 48" X 10" Floor Openings Typ. Alternate Hood Location. If hood location switched, plug existing mounting holes on opposite side of unit to prevent leakage. CL 40 1/8" Typ. 33 7/8" Minimum Service Area Door Swing A CURB CA4XRT 50 1/2" I.D. FA RA 35 1/2" Case CL 26" CL 9 1/2" TOP VIEW 83" Overall 81 3/8" Case 77 1/4" Lifting Lugs 2" Typ. 73 3/8" I.D. 77 1/8" O.D. TOP VIEW OA Hood can be mounted to either side of unit 55 1/2" Overall 30 5/8" Lifting Lugs ABBREVIATIONS EA: Exhaust Air to outside OA: Outside Air intake RA: Room Air to be exhausted FA: Fresh Air to inside 1 7/8" INSTALLATION ORIENTATION Unit must be installed in orientation shown. NOTE 1. UNLESS OTHERWISE SPECIFIED, DIMENSIONS ARE ROUNDED TO THE NEAREST EIGHTH OF AN INCH. A 2. SPECIFICATIONS MAY BE SUBJECT TO CHANGE WITHOUT NOTICE. 28 7/8" I.D. 32 5/8" O.D. 13 3/8" CURB CROSS-SECTION A-A (TYP.) 1 1/2" X 1/4" 1 7/8" Neoprene Gasket 14" 3/4" X 3 1/2" Wooden Nailer 3" SECTION A-A 48 1/8" Typ. 10" Typ. 24 7/8" Typ. 5 7/8" Typ. 42 1/8" Overall 39 1/4" Case 16" Typ. Floor pan inlets/outlets are open by default; These can be patched from inside the unit with removeable insulated pans from the side openings, if unused. LEFT VIEW AIRFLOW CONFIGURATION MoAdvaeilalb:leCaAs s4hXowRnTin dimension drawing. Drawing Type: Unit Dimension Version: MAY16 Pressure Ports (4) Typ. Note: Pleated, disposable 20" X 20" X 2" filters are provided for installation and are interchangeable based on your airflow path requirements. Filters are to be mounted upstream to the core in the direction of airflow entering the unit. FRONT VIEW Lower side pan inlets/outlets are patched with removable insulated pans. RIGHT VIEW UNIT MOUNTING & APPLICATION Must be mounted as shown. Duct configuration is field convertible. Weather hood can be moved in the field. RA/EA airstream can be switched with OA/FA airstream. 1.800.627.4499 7 TABLE OF CONTENTS ERV CA-Series Rooftop 1.0 OVERVIEW 9 3.0 OPERATION 15 1.1 CA-SERIES OPERATION.......................................... 9 1.2 APPLICATION GUILDLINES.......................................9 1.2.1 Purpose of CA-Series Rooftop Cabinets ...............................9 1.2.2 General Layout ...................................................................9 1.3 SERVICE ACCESS..................................................10 1.3.1 Service Access ................................................................. 10 1.3.2 Connection to HVAC System.............................................. 10 2.0 INSTALLATION 10 2.1 BLOWER ORIENTATION .........................................10 2.1.1 Pull-Pull--Recomended .................................................... 11 2.1.2 Advantages....................................................................... 11 2.1.3 Disadvantages .................................................................. 11 2.2 BLOWER SIZING ...................................................11 2.3 STATIC PRESSURE DROP THROUGH THE CABINET .11 2.4 PLACEMENT OF THE CA-SERIES ROOFTOP ............12 2.5 RIGGING INFORMATION.........................................12 2.6 MOUNTING THE CA-SERIES ROOFTOP ...................13 2.6.1 On Roof Curbs .................................................................. 13 2.6.2 On Equipment Rails........................................................... 13 2.7 DUCTING ..............................................................13 2.8 INSIDE DUCTWORK SYSTEM .................................14 3.1 PRINCIPAL OF OPERATION ....................................15 3.2 CHECKING THAT UNIT IS OPERATING.....................15 3.2.1 Airflow ............................................................................. 15 3.2.2 Use Static Taps in Doors to Measure Airflow Rates............ 15 3.3 ENERGY EXCHANGE..............................................16 3.4 CONTINUOUS OPERATION .....................................16 3.5 OPERATION IN EXTREME COLD WEATHER .............16 3.6 MEASURE AIRFLOW..............................................16 3.6.1 Equipment Required.......................................................... 16 3.6.2 Cross Core Static Pressure Measurement Instructions....... 16 4.0 MAINTENANCE 17 4.1 CHANGING THE FILTERS .......................................17 4.2 GENERAL CLEANING AND INSPECTION..................17 4.3 CLEAN THE ENERGY EXCHANGE CORE ..................17 4.4 FILTERS ...............................................................18 4.4.1 Filter Specifications .......................................................... 18 4.4.2 Filter Resistance............................................................... 18 5.0 FACTORY ASSISTANCE ...........................19 TABLE OF ILLUSTRATIONS Figure 1.3.0 CA-Series Rooftop Cross Section............................................................................................................................................ 9 Figure 2.1.0 CA-Series Rooftop Blower Orientation ................................................................................................................................... 10 Figure 2.3.0 Rated Pressure Drop Through Cabinet .................................................................................................................................. 11 Figure 2.5.0 CA-Series Rooftop Unit and Corner Weights (lbs) .................................................................................................................. 12 Figure 2.7.0 CA-Series Rooftop Ducting Information ................................................................................................................................. 13 Figure 2.8.0 CA-Series Rooftop Ducting Configuration 1........................................................................................................................... 14 Figure 2.8.1 CA-Series Rooftop Ducting Configuration 2 ........................................................................................................................... 15 Figure 2.8.2 CA-Series Rooftop Ducting Configuration 3........................................................................................................................... 15 Figure 3.6.0 Proper Operating Airflow Range............................................................................................................................................ 16 Figure 3.6.1 Pressure Tap Locations ........................................................................................................................................................ 17 Figure 3.6.2 Differential Static Across Core DSP vs. CFM ......................................................................................................................... 17 Figure 4.4.0 CA-2XRT Initial Pressure Drop 20" x 20" MERV 8 Filters ....................................................................................................... 18 Figure 4.4.1 CA-3XRT Initial Pressure Drop 20" x 20" MERV 8 Filters ....................................................................................................... 19 Figure 4.4.2 CA-4XRT Initial Pressure Drop 20" x 20" MERV 8 Filters ....................................................................................................... 19 8 1.800.627.4499 CA-Series Rooftop CONFIGURATION CODE ERV C A - MODEL NUMBER JRT - - - - - - - - - - - - - - N DIGIT NUMBER 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Digits 1 - 5: Model "CA-2X" = Cabinet Applied 2 Cores "CA-3X" = Cabinet Applied 3 Cores "CA-4X" = Cabinet Applied 4 Cores Digit 24: Other Options "-" = None "W" = White Paint "C" = Custom Paint "X" = Custom Unit Digit 11: "S" = Single "D" = Double Wall Type Digit 25: Safety Listing "N" = Non-Listed 1.0 OVERVIEW 1.1 CA-SERIES ROOFTOP OPERATION The CA-Series Rooftop cabinets have one basic purpose: to transfer heating or cooling energy from an exhaust airstream to a fresh airstream. The CA-Series Rooftop cabinets operate with no moving parts. The cores in the modules will transfer energy between the two airstreams as long as the two system blowers are moving air through the module. (These blowers are separate from the cabinets). 1.2 APPLICATION GUIDELINES CA ROOFTOP 1.2.1 Purpose of CA-Series RooAftoPp PLIED PRODUCT CONFIGURATION CODE The CA-Series Rooftop cabinets are modular cases with 2, 3, or 4 energy recovery cores. A variety of duct connection configurations are possible. Disposable filters are provided; they are of a common size and can easily be replaced. 1.2.2 General Layout The CA-Series Rooftop cabinets are used to transfer energy from exhaust air leaving a building, into fresh air being brought in from the outside for ventilation. By recoverying energy from the exhaust airstream, the benefits of ventilation can be enjoyed without the full energy cost to condition the outside air. The CA-Series Rooftop cabinets do not contain blowers. Therefore, two blowers must be installed as part of the system. Several ducts must also be installed. 1.800.627.4499 9 INSTALLATION ERV CA-Series Rooftop FIGURE 1.3.0 CA-SERIES ROOFTOP CROSS SECTION 1.3 SERVICE ACCESS www.renewaire.com (800) 627- 4499 support@renewaire.com www.renewaire.com (800) 627- 4499 support@renewaire.com 1.3.1 Service Access Install the ERV where you can open the door for cleaning the core and filter. Although there is no electrical connection to the cabinet, there should be a nearby system disconnect switch, so service people can shut off the blowers connect to the system when changing filters. CAUTION The maximum pressure differential between the two airstreams shound not exceed 4 inches (H2O). 1.3.2 Connection to the HVAC System In most cases, one or two ducts connect the CA-Series Rooftop cabinet to the building's ducted HVAC system. A variety of connection approaches are possible, depending on the number of CASeries Rooftop cabinets in the installation, purpose of the system, and available space. The filters must cover the INLET FACES of the cores. Filter racks are provided at each face to handle all possible airflow configurations. 2.0 INSTALLATION 2.1 BLOWER ORIENTATION Two blowers will be required: one for the air to be exhausted from the building, another for the fresh air to be brought into the building. See diagram for proper and improper blower locations. Alternate Construction FIGURE 2.1.0 CA-SERIES ROOFTOP BLOWER ORIENTATION www.renewaire.com (800) 627- 4499 10 1.800.627.4499 support@renewwwawir.ere.cnoemwaire.com (800) 627- 4499 support@renewaire.com CA-Series Rooftop INSTALLATION ERV 2.1.1 Pull-Pull--RECOMMENDED This is the recommended blower orientations for virtually every application. In "Pull-Pull" applications, both pull from the cabinet. With Pull-Pull blower orientation, there is generally no need to review the static pressure differences between the two airstreams. An "RA Push-FA Pull" blower orientation is unacceptable. The advantage is that both blowers are on the "outside" of the cabinets, taking advatage of the acoustic attenuation offered by the cabinets. If outside airstream bypass airflow occurs, it additionally insures no exhaust contaminants leak past seals into the fresh air. The disadvantage is that both blowers must be sized to provide the additional bypass air, which in most cases is a needless waist of energy. The higher overall static pressure tend to increase duct leakage. sis MAR16 2.2 BLOWER SIZING Chart Most "low airflow" problems in the field are caused by under-sized blowers. Systems can under-perform if the designer does not make sufficient allowance for duct leakage, variations in duct layout from ideal design, less-than-ideal blower outlet conditions, dirty filters, and the like. In general, ventilation systems with energy-recovery components tend to need blowers with relatively high static pressure curves. In addition, parts of the duct system may be operating at higher static pressures than usual, and greater duct leakage may result. While these effects may be small, they may consume a large portion of the "safety factor" that a designer conventionally adds in every blower selection exercise. Given all these concerns, it is prudent to select blowers and motors that can be operated at higher RPMs than required by the nominal design. NOTE: This bypass air volume is lower than in most competing technologies, such as heat wheels, and even some other plate-type exchangers. 2.3 STATIC PRESSURE DROP THROUGH THE CABINET The following chart is to be used when considering a Pull-Pull orientation of the blowers. The chart represents clean filters. It will be necessary to add an additional drop to allow for the build-up of dirt on the filters. Static Presure Drop (in.w.g) 2.0 1.5 1.0 0.5 0.0 0 Airflow (CFM) 1000 2000 3000 4000 FIGURE 2.3.0 RATED PRESSURE DROP THROUGH CABINET 1.800.627.4499 11 INSTALLATION ERV CA-Series Rooftop 2.4 PLACEMENT OF THE CA-SERIES ROOFTOP The CA-Series Rooftop cabinet is designed for installation on a roof or other outside location. Select a location that is central to the inside duct runs, and close to any other air handler that might be part of the system. WARNING The unit's outside air inlet should be at least 10' away from any exhaust, such as dryer vents, chimneys, furnace, and water heater exhausts, or other sources of contamination or carbon monoxide. Do not locate the outside air inlet where vehicles may be serviced or left idling. Never locate the unit inside a structure. WARNING Danger of damage or severe injury if high winds move this unit. Secure unit to structure. Ovserve local code requirements at a minimum. CAUTION It is the installer's responsibility to make sure that the screws or bolts used for securing the units are properly selected for the loads and substrates involved. Secure the CA-Series Rooftop cabinet so that it cannot fall or tip in the event of an accident, structural failure, or earthquake. See Rigging Information for unit weight. RenewAire strongly recommends that you secure rooftop units properly to the building structure. Strong winds, tornados, and hurricanes can and do displace or remove rooftop equipment from rails or curbs. When this happens, the equipment, adjacent roof structure, and even vehicles parked near the building can be damaged, and rain typically enters the building. The equipment is put out of service and the collateral damage can be very expensive. CAUTION Provide Adequate Service Access for Maintenance The CA-Series Rooftop cabinet will require regular filter and core inspections. Install the CASeries Rooftop cabinet where you can remove the doors for cleaning the core and replacing the filters, and where you can get at the wiring for installation and service. The CA-Series Rooftop cabinet is available from the factory in one configuration where room air enters the bottom of the unit and fresh air exits the bottom of the unit. The relocatable patch pans allow different duct connection configurations. 2.5 RIGGING INFORMATION There are lifting lugs at each upper corner of the unit. Use slings or shackles at all four corners. Spreader bars are recommended in order to avoid damage to the unit. 12 1.800.627.4499 CA2-4XRT CABINET UNIT WEIGHTS (LBS) LS UNIT Dim "A" LF LR RR RF T 250 39 3/8 71 69 54 56 T 377 59 1/4" 107 104 81 85 T 462 79" 131 128 99 104 CA-Series Rooftop INSTALLATION ERV 822 3/4 CA2-4XRT CABINET UNIT WEIGHTS (LBS) LR RR MODELS UNIT Dim "A" LF LR RR RF TOP VIEW 2XRT depicted) A CA2XRT CA3XRT CA4XRT 250 39 3/8" 71 69 54 56 377 59 1/4" 107 104 81 85 462 79" 131 128 99 104 LF RF LR RR TOP VIEW FIGURE 2.5.0 CA-SERIES ROOFTOP UNIT(CAAN2DXRCTOdReNpEicRteWdE)IGHTS (LBS) (CA2XRT DEPICTED) 2.6 MOUNTING THE CA-SERIES RCOAO-RFTTCOoPrner Weights 2.6.1 On Roof Curbs: CA-RT_CORNER_WEIGHTS_DEC12.dwg The base of the CA-Series Rooftop cabinets are designed for installation on our optional Roof Curb. See Curb portion on Dimension Drawings. Before installing CA-Series Rooftop cabinets, apply roofing and counterflashing to Roof Curb as per standard practice. Install appropriate gasket on top of Roof Curb. Set CA-Series Rooftop cabinet in place. We recommend bolting through sides of unit base into the Roof Curb to secure the unit against high winds. 2.6.2 On Equipment Rails: Review drawing of Roof Curb and specify Equipment Rail to fit. Before installing CA-Series Rooftop cabinets, apply roofing and counterflashing to Equipment Rails as per standard practice. Set CA-Series Rooftop cabinet in place. We recommend bolting through sides of unit base into the Equipment Rails to secure the unit against high winds. NOTE: OA Hood provided, can be mounted on either side of the cabinet CA-RT CoovrenretrhWe euipgphetrs cabinet openings. See Duct ConCA-RT_COnReNcEtRi_oWnElIGoHcTaSt_ioDnECs1b2.edwlogw depending on which side of the cabinet the OA hood is installed. 2.7 DUCTING Before unit is installed on Curb: Basic Requirements: Always connect an RA and an FA duct to each Rooftop unit. The RA and FA ducts can be interchanged depending on where you install the OA hood. With standard configuration units, both ducts are inside the building. In other unit, that utilize the optional configuration openings, at least one of the ducts is outside and must be weatherized. Any weatherized duct must be thermally insulated to prevent condensation on the inside or outside of the duct. The duct lining must be vapor-sealed, and the duct exterior must be rain tight. Duct(s) connected to the bottom of the CA-Series Rooftop cabinet are generally installed at this time. Install (2) ducts with CA-Series Rooftop cabinet standard configuration. Drop duct(s) into openings in top of roof curb. Install appropriate gasket on top of Roof Curb and edges of ducts. 1.800.627.4499 13 INSTALLATION ERV CA-Series Rooftop CAUTION Tape both inner and outer vapr barriers of insulated duct to collars on duct adapters. This is critical to prevent migration of moisture into insulation. Build-up of moisture can result in failure of the duct system and/or frost in the insulation. Make sure any tears in the inner and outer vapor barriers are sealed. 19 3/4" CLEARANCE FOR HOOD BOTTOM VIEW 19 3/4" CLEARANCE FOR HOOD FA IF HOOD IS HERE RA FA IF HOOD IS HERE RA 35 1/4" SERVICE AREA FOR DOOR www.renewaire.com (800) 627- 4499 support@renewaire.com FIGURE 2.7.0 CA-SERIES ROOFTOP DUCTING INFORMATION 2.8 INSIDE DUCTWORK SYSTEM Follow Engineer's Ductwork Design: u Ductwork should be designed by an engineer to allow the unit to provide the required airflow. u Ducts should enter and exit the unit through smoot gradual transitions. u If the inside ducts run through un-conditioned spaces, they must be insulated, with a sealed vapor barrier on both inside and outside of insulation. See drawings below for examples of some common installation approaches. 14 1.800.627.4499 FIGURE 2.8.0 CA-SERIES ROOFTOP DUCTING CONFIGURATION 1 CA-Series Rooftop OPERATION ERV FIGURE 2.8.1 CA-SERIES ROOFTOP DUCTING CONFIGURATION 2 www.renewaire.com (800) 627- 4499 support@renewaire.com FIGURE 2.8.2 CA-SERIES ROOFTOP DUCTING CONFIGURATION 3 3.0 OPERATION 3.1 PRINCIPAL OF OPERATION The CA-Series Rooftop cabinet has one basic purpose: to exhaust air from a structure and bring in fresh air from outside, while transferring heating or cooling energy from the exhaust air to the fresh air. www.renewaire.com (800) 627- 4499 support@renewaire.com The CA-Series Rooftop cabinet is a very simple device, and will accomplish this purpose as long as the blowers for both airstreams are able to move air through the energy-exchange core. 3.2 CHECKING THAT UNIT IS OPERATING 3.2.1 Airflow Airflow should be occurring in both airstreams. Sometimes the easiest place to confirm that air is moving is at the weatherhoods. If exact airflow is critical, it may be desirable to permanently install flow measuring stations and manometers in the ductwork connected to the unit. These also can be used to determine when filters should be cleaned or changed. 3.2.2 Use Static Taps in Doors to Measure Airflow Rates See "Cross-Core Static Drop" in MEASURING AIRFLOW table. These may be used to directly measure airflow in the unit. 1.800.627.4499 15 OPERATION ERV CA-Series Rooftop 3.3 ENERGY EXCHANGE Precise determination of installed sensible energy exchange effectiveness requires careful measurement of temperatures and air flows in all four airstreams, and in practice is somewhat difficult. It is possible to confirm that energy is being exchanged simply by feeling the ducts. If the Fresh Air duct from the unit into the room is closer to room temperature than to the outside temperature, energy is being recovered. NOTE: Be sure to remove cap from pressure port before inserting tubing. Insure tubing is well seated in pressure port. NOTE: The tubing should extend in thepressure port approximately 1". NOTE: These ports have been carefully located on the unit as to give you the most accurate airflow measurement. NOTE: Do not relocate pressure ports. NOTE: Be sure to replace cap into pressure port when air flow measuring is completed. 3.4 CONTINUOUS OPERATION Continuous operation is acceptable in virtually all conditions. Unit will not be damaged by continuous operation as long as air flow occurs. Blower motors may overheat if filters become completely blocked due to lack of maintenance. With continuous operation, some external frosting may occur in very cold weather (see below). 3.5 OPERATION IN EXTREME COLD WEATHER Unit is capable of operating at outside temperatures down to -10°F, with indoor humidities below 40%, without any internal frosting. Unit can operate at more severe conditions occasionally with little or no impact on its performance. At lower humidities, it can operate at lower outside temperatures without freezing the energy-exchange core. 3.6 MEASURING AIRFLOW 3.6.1 Equipment Required u A magnehelic gauge or other device capable of measuring 01.5 inch water of differential pressure. u Two pieces of natural rubber latex tubing, 1/8" ID, 1/16" wall works the best. 3.6.2 Cross Core Static Pressure Measurement Instructions u The individual differential static pressures (DSP) can be measured using the installed pressure ports located in the front of the units core access doors. u To read SCFM of Fresh Air (FA), install the "high" pressure side (+) of your measuring device to the Outside Air (OA) port and the "low" pressure side (-) to the FA port. u To read SCFM of Room Air (RA) install the "high" pressure side (+) of your measuring device to the RA port and the "low" pressure side (-) to the Exhaust Air (EA) port. u Use the reading displayed on your measurement device to cross reference the CFM output using the conversion chart. Model CA2X CA3X CA4X CFM 5002200 7503300 10004400 FIGURE 3.6.0 PROPER OPERATING AIRFLOW RANGE 16 1.800.627.4499 CA-Series Rooftop MAINTENANCE ERV PRESSURE PORTS (4) TYP. FIGURE 3.6.1 PRESSURE PORT LOCATIONS DSP 0.20" CA4X CA3X CA2X CFM Fresh Air (FA) 529 Room Air (EA) 567 Fresh Air (FA) 818 Room Air (EA) 732 Fresh Air (FA) 1221 www.renewaire.com (800) 627- 4499 Room Air (EA) 1130 0.25" 662 709 1023 915 1526 1412 0.30" 0.35" 0.40" 794 926 1058 851 993 1134 1227 1432 1636 1098 1281 1464 1832 2137 2442 support@renewaire.com 1695 1977 2260 0.45" 1191 1276 1841 1647 2747 2542 0.50" 1323 1418 2045 1830 3053 2825 0.55" 1455 1560 2250 2013 3358 3107 0.60" 1588 1701 2454 2196 3663 3390 0.65" 1720 1843 2659 2379 3969 3672 0.70" 1852 1985 2863 2562 4274 3955 0.75" 1985 2127 3068 2745 4579 4237 FIGURE 3.6.2 DIFFERENTIAL STATIC ACROSS CORE DSP VS. CFM 4.0 MAINTENANCE 4.1 CHANGING THE FILTERS Inspect and/or replace filters every 23 months when the unit is in regular use, or as needed. u Turn off unit completely! Lock-out and tag-out the system disconnect switch. u Open the door. The door is secured with turn-type latches. u Remove and dispose of all filters. Replace all filters. u Close the door. 4.2 GENERAL CLEANING AND INSPECTION Perform general cleaning and inspection when changing filters. u Remove paper, leaves, etc. from inlet and outlet screens. u Inspect for insect nests. NOTE: See chart for information on the initial resistance of the filters originally supplied with this unit. If replacement filters have higher resistance, the airflow of the system will be lower. 4.3 CLEAN THE ENERGY EXCHANGE CORE Clean the core annually. u Remove the filters. u Vacuum the exposed faces of the energy exchanger core with a soft brush. u Vacuum out dust from the rest of the unit case. u Install new filters. 1.800.627.4499 17 MAINTENANCE ERV CA-Series Rooftop 18 1.800.627.4499 IMPORTANT Make sure all four lips of the core enter the receiver channels when re-inserting the core into the unit. CAUTION Filters must be used or the energy exchanger core will become blocked by dust and the unit will not do its job. In extreme cases components may be damaged. CAUTION Do Not Wash the Energy Exchange Core. Keep it away from water or fire to avoid damaging it. Always handle the core carefully. WARNING ALWAYS DISCONNECT POWER SOURCE BEFORE SERVICING, TO ENSURE NO AIR FLOW IN THE SYSTEM. High volume of air in the case when operating! If you open an access door when the system is running, you may be exposed to as much as 8,000 CFM! Severe eye injury could result! 4.4 FILTERS 4.4.1 Filter Specifications u 20" x 20" x 2" (nominal) pleated filters u Actual size: 19.5" x 19.5" x 1.75" Units are shipped with MERV 8 Filters. Minimum recommended effectiveness is MERV 6. 4.4.2 Filter Resistance Initial resistance of filters supplied with this unit: 0.4 Clean-filter Pressure Drop (in.w.g.) 0.3 0.2 0.1 0.0 500 1000 1500 2000 Unit Airflow (CFM) FIGURE 4.4.0 CA-2XRT INITIAL PRESSURE DROP 20" X 20" MERV 8 FILTERS CA-Series Rooftop FACTORY ASSISTANCE ERV Clean-filter Pressure Drop (in.w.g.) Clean-filter Pressure Drop (in.w.g.) 0.4 0.3 0.2 0.1 0.0 500 1000 1500 2000 2500 3000 3500 Unit Airflow (CFM) FIGURE 4.4.1 CA-3XRT INITIAL PRESSURE DROP 20" X 20" MERV 8 FILTERS 0.4 0.3 0.2 0.1 0.0 500 1000 1500 2000 2500 3000 3500 4000 Unit Airflow (CFM) FIGURE 4.4.2 CA-4XRT INITIAL PRESSURE DROP 20" X 20" MERV 8 FILTERS 5.0 FACTORY ASSISTANCE In the unlikely event that you need assistance from the factory for a specific issue, make sure that you have the information called for in the Unit Records page in the Owner Information section of this manual. The person you speak with at the factory will need that information to properly identify the unit and the installed options. To contact RenewAire Customer Service: Call 800-627-4499 Email: RenewAireSupport@RenewAire.com Remember that RenewAire Customer Service can only assist with the products sold by RenewAire, it cannot resolve engineering issues that result from air handling system design by others. 1.800.627.4499 19 About RenewAire For over 30 years, RenewAire has been a pioneer in enhancing indoor air quality (IAQ) in commercial and residential buildings of every size.This is achieved while maximizing sustainability through our fifth-generation, static-plate, enthalpic-core Energy Recovery Ventilators (ERVs) that optimize energy efficiency, lower capital costs via load reduction and decrease operational expenses by minimizing equipment needs, resulting in significant energy savings. Our ERVs are competitively priced, simple to install, easy to use and maintain and have a quick payback. They also enjoy the industry's best warranty with the lowest claims due to long-term reliability derived from innovative design practices, expert workmanship and Quick Response Manufacturing (QRM). As the pioneer of static-plate core technology in North America, RenewAire is the largest ERV producer in the USA. We're committed to sustainable manufacturing and lessening our environmental footprint, and to that end our Waunakee, WI plant is 100% powered by wind turbines. The facility is also one of the few buildings worldwide to be LEED and Green Globes certified, as well as having achieved ENERGY STAR Building status. In 2010, RenewAire joined the Soler & Palau (S&P) Ventilation Group in order to provide direct access to the latest in energyefficient air-moving technologies. For more information, visit: renewaire.com 201 Raemisch Road | Waunakee, WI | 53597 | 800.627.4499 | RenewAire.com Member of the S&P Group Family of Brands 2021 © RenewAire LLC 148051_003_JUN21