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Models RRW, RFRW, RRC,RFRC, RRWI and RFRWIDimensionsand dataDimensions and dataPipingsectionD or FModels RRW, RFRW, RRC,RFRC, RRWI and RFRWIFan speedsectionOutlet opening centered10"Top viewE or G(top outlet)RFRW-340shown3/8" wd. x 1" lg.mounting slot(4 places)C16"RFRC-410shown4"8"BFront viewElectricalend pocket8"7 1/8"1 row hotwater returnand 1 rowsteam supplyMK2"(less front panel)HA2, 3 & 4 row hotwater supply3"2, 3 & 4 row hotwater return18 3/8"LJ13 5/8"6"27" 24"1 row hotwater supplyand 1 rowsteam return6"Front 286-3/16 92-3/16CH6" Ext.6" Ext. 61 row hotwater returnand 1 rowsteam supply77-3/1683-3/162"91-3/163 Row4 Row16-9/162 Row2, 3 & 4 row hotwater return65-3/1670-3/16 72 68 6 66-3/16 5-1/8 89-3/16 95-3/16 101-3/16Dimensional dataCoilJKLMNPRTJK 15-3/4 L4-7/16 16-9/16MN 7-7/16 P5-3/16 8-1/4R 4-7/16T2 Row5-3/163-1/16 5-3/1617-1/8 4-13/164-13/16 7-7/1615-3/4 3 Row4-7/1616-9/1616-9/167-7/16 6-1/85-3/168-1/4 3-1/16 4-7/164 Row 16-9/16 3-1/16 17-1/8 4-13/16 6-1/8 4-13/16 7-7/16 4-13/16CoilFilter urn1/2"nominal(5/8"OD)allsizes.Notes:- Leftandhandpiping1/2"connectionsshown,right 1 and 2 row coil supplyreturnnominal (5/8"OD)all handsizeselectrical as standard.Pipingpipinghand determinedwhenthe airelectricaloutlet. connections as standard Unit shown with left handconnectionsand facingright hand- Unit length:withfor 6"extendedend pocketadd 6" to dimension"A"anand"H". Right hand piping connectionslefthand electricalconnectionsavailable asoption Piping hand determinedwhendimensionsfacing the areair outlet- All listedapproximate and are subject to change without All listed dimensions notice.are approximateandtoarechange withoutnoticeModificationsthe subjectproduct tospecificstionsmust beacceptrd by Modifications to the productmust be accepted by Zehnder Rittling at its base officeZehnder specificationsat its base office. See www.zehnder-rittling.com for any recent updates or changesTP7 1/8"R38-3/16Louvers DuctDimensionaldata openingLouversDuctDEFG 3/16 23-5/8 20618-3/165-1/828-3/1626 6 2624-3/165-1/8 47-3/1628-3/1630 29-5/8624-3/165-1/834-3/1636 35-5/8630-3/165-1/834-3/1632 6 3230-3/165-1/8 53-3/1646-3/16 47-5/8 /16 53-5/8 50648-3/165-1/852-3/1650 6 5848-3/165-1/8 71-3/1660-3/1654 61-5/8656-3/165-1/870-3/1662 71-5/8666-3/165-1/860-3/1658 6 6856-3/165-1/8 79-3/16BN02AUnit 6" Ext.Ax26" Ext.size44-3/1602 50-3/1638-3/1650-3/1603 56-3/1644-3/1604 /1674-3/1610 80-3/1676-3/1612 88-3/1686-3/1682-3/1610 3/8"Std.5 5/8"UnitsizeSide view: Model RRW, RFRW, RRC and RFRC(Front outlet)Dimensional dataFilterpositions2 3/8"2, 3 & 4 row hotwater supply1 row hotwater supplyand 1 rowsteam returnSide view: Model RRWI and RFRWI9

DIMENSIONS AND DATADimensions and dataDamperFront viewA29-1/4"(Slope top unit)26-1/2"Damper opening1-7/8"D3/8"Motorized damperManual damperMotor endDimensional dataUnit -3/1670-3/87233-5/8Notes: Damper motor always on right side when viewing unit from front side. All listed dimensions are approximate and are subject to change withoutnotice. Modifications to the product specifications must be accepted byZehnder Rittling at its base office. Available for models RF and RS only.10

Dimensions and dataOutside air wall boxTelescoping inner andouter aluminum boxUnpainted aluminum louveredinlet grille with internal bug screen4" to 8"Dimensional data1/2"2 5/8"2 13/16"ModelARough openingWB-02032422-1/2 x 3WB-04062927-1/2 x 3WB-0810123937-1/2 x 3Side ViewA3 1/2"Front ViewWeep holes11

DIMENSIONS AND DATADimensions and dataWall seal kitShips loose for field mountingFront viewRFRW-340shownDimensional dataAHTop viewUnit 161286-3/1689-3/1610" For fully recessed units locate frameflush with front For partially recessed units locateframe as needed Use sheet metal screws (by others)to secure trimframe to the unit.2"AH1227"24"Side view

GENERAL INFORMATION / RECEIVINGGeneral informationThis installation and start-up instructions literature is for horizontal and vertical Cabinet Unit Heaters. Cabinet Unit Heatersare hydronic terminal units designed for year-round heating. Your equipment is initially protected under the Zehnder Rittlingstandard 2-year warranty provided the steps outlined in this manual for initial inspection, installation, periodic maintenanceand normal every day operation of the equipment are followed. This manual should be thoroughly reviewed prior to theinstallation, start-up or maintenance of the equipment. If any questions arise, please contact your local Zehnder Rittling salesrepresentative or the factory before proceeding any further.There are a multitude of options and accessories available with the equipment covered in this manual. For more specificdetails on the included options and accessories, refer to the order acknowledgment, approved submittals and catalogs.ReceivingUpon delivery, examine the shipment against the bill of lading to make sure all of the units have been received and then checkeach unit carefully for shipping damage. Any damage should be reported to the freight carrier and a claim should be filedwith them. Ensure the shipping company makes proper notation of any shortages or damage on all copies of the freight bill.Concealed damage not discovered during unloading must be reported to the shipping company within 15 days of receipt ofthe shipment.All units are shipped F.O.B. factory. Therefore, Zehnder Rittling is not responsible for damage during transit. It is theresponsibility of the installing contractor to inspect and verify that the units shipped were in fact the correct model number,voltage, etc. Any discrepancies should be reported to the local Sales Representative for immediate resolution prior tounpackaging and installation. The factory should be notified of any warranty repairs required in writing before any correctiveaction is taken. The factory must be fully informed of the expected costs before the work is begun. Zehnder Rittling is notresponsible for any repairs or alterations made by the purchaser without Zehnder Rittling’s written consent and will not acceptany back charges associated with these repairs or alterations. The return of damaged equipment will not be accepted withoutwritten authorization from Zehnder Rittling.A unit that has received a written Return Goods Authorization will be inspected by Zehnder Rittling upon receipt. Any damage,missing parts, reworking or repackaging resulting from prior installation will constitute just cause for Zehnder Rittling to issuepartial credit.Several components are shipped loose for field installation and to offer added protection during shipment and job sitestorage. These items may include; thermostat, valve packages, remote temp sensors, etc.13

SAFETY CONSIDERATIONSSafety considerationsThe installation of Cabinet Unit Heaters and all associatedcomponents, parts and accessories which make up theinstallation, shall be in accordance with the regulationsof all authorities having jurisdiction and must conform toall applicable codes. Only trained and qualified servicepersonnel using good judgment and safe practices shouldinstall, repair and/or service air conditioning equipment.Untrained personnel can perform basic maintenancefunctions such as cleaning coils and cleaning or replacingfilters. All other operations should be performed by trainedservice personnel. When working on air conditioningequipment, observe precautions in the literature, tagsand labels attached to the equipment and all other safetyprecautions that may apply.Improper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electricalshock or other hazardous conditions which may causeserious personal injury and/or property damage. Consult aqualified installer, service agency, or your sales representativefor information or assistance.The equipment must always be properly supported by riggingand lifting equipment. Any temporary supports used duringinstallation or maintenance must be designed to adequatelyhold the equipment in place until equipment is permanentlyfastened and set in its final location. All supports must meetapplicable local codes and ordinances.All fastening devices must be designed to mechanically holdthe assembly in place without the ability to loosen or breakaway due to system operation or vibration.All power must be disconnected and locked out before anyinstallation or service is performed to avoid electrocution orshock. More than one power source may be supplied to aunit. Power to remote mounted units may not be suppliedthrough the unit.Never use bulky or loose fitting clothing when working on anymechanical equipment. Gloves should always be worn forprotection against heat, sharp edges and all other possiblehazards. Safety glasses should always be worn, especiallywhen drilling, cutting or working with chemicals.14Never pressurize equipment beyond specified pressures asshown on unit rating plate. Always pressure test with an inertfluid such as water or dry nitrogen to avoid possible damageor injury in the event of a leak or component failure duringtesting.Always protect adjacent flammable material when weldingor soldering. Use a suitable heat shield material to containsparks or drops of solder. Have a fire extinguisher readilyavailable.Please follow standard safe practices regarding the handling,installing or servicing of mechanical equipment. Read theseinstructions thoroughly and follow all warnings or cautionsattached to the equipment. Consult local building codes andthe National Electrical Code(NEC) for special installationrequirements.Understand the signal words: danger, warning and caution.Identifies the most serious hazards which will result in severepersonal injury or death.Signifies hazards that could result in personal injury or death.Used to identify unsafe practices, which would result in minorpersonal injury or product and property damage.The manufacturer assumes no responsibility for personalinjury or property damage resulting from improper orunsafe practices during the handling, installation, serviceor operation of the equipment. The installation of CabinetUnit Heaters and all associated components, parts andaccessories shall be in accordance with the regulations ofall authorities having jurisdiction and must conform to allapplicable codes. It is the responsibility of the installingcontractor to determine and comply with all applicable codesand regulations.

UNPACKING AND PREPARATIONUnpacking and preparationAll units are carefully inspected at the factory throughout theentire fabrication and assembly processes under ZehnderRittling’s stringent quality assurance program. All majorcomponents and subassemblies such as motors, blowers,coil, controls, valve package and paint quality are carefullytested for proper operation, visually inspected and verifiedfor full compliance with factory standards. Operationaltesting for some customer furnished components such aspneumatic valves and DDC controllers may be a possibleexception.Cabinet Unit Heaters are usually shipped on pallets of upto 5 units. Each unit is factory tagged according to thecustomer’s purchase order. This allows the unit, uponremoval from the pallet, to be taken directly to its’ assignedspace for immediate installation. Units should not beinstalled at locations other than that designated on the tag.Each unit is carefully packaged in a polyethylene plastic bagfor surface protection, placed in a cardboard container andfilled with kraft paper padding for shipment to avoid damageduring normal handling in the shipment process. It is thesole responsibility of the customer to provide the protectionnecessary to prevent vandalism and weather deteriorationof the equipment. Under no condition should the units beleft unprotected from the elements. If the equipment isnot needed immediately at the job site, it should be left inits shipping carton and stored in a clean, dry area of thebuilding or in a warehouse. Do not remove any equipmentfrom its shipping package until it is needed for installation.The equipment is NOT suitable for outdoor installations.Once the equipment is properly positioned on the job site,cover the units with either a shipping carton, vinyl film, oran equivalent protective covering. Cap open ends of pipingthat is stored on a job site. Take special care to preventforeign materials from entering the units in areas wherepainting, dry walling, or spraying of fireproof material,etc., has not yet been completed as these materials mayaccumulate on the motors and blower wheels. Foreignmaterial that accumulates within the units can preventproper start-up, necessitate costly clean-up operations, orresult in immediate or premature component failure. Beforeinstalling any of the system components, be sure to examineeach pipe, fitting and valve, and remove any dirt or foreignmaterial found in or on these components. All manufacturer’swarranties are void if foreign material is allowed to bedeposited on the motor or blower wheels of any unit. Somejob conditions may require some form of temporary unitcovering during construction.DO NOT store or install units in corrosive environments or inlocations subject to temperature or humidity extremes (e.g.,attics, garages, rooftops, etc.). Corrosive conditions andhigh temperature or humidity can significantly reduce systemperformance, reliability and overall service life.After determining the condition of the cardboard containerexterior, carefully remove each unit from the containerand inspect for hidden damage. At this time, check that allshipped loose items such as wall mounted thermostats,aquastats, remote temperature sensors, valve package, etc.,are accounted for and placed in a safe area. Any hiddendamage should be recorded and immediately reported tothe carrier and a claim should be filed. In the event a claimfor shipping damage is filed, the unit, cardboard container,and all packing must be kept for physical inspection by thefreight carrier.15

HANDLING AND INSTALLATIONHandling and installationWhile all equipment is designed for durability and fabricatedwith heavy gauge materials and may present a robustappearance, great care must be taken to assure that noundue force is applied to the coil, piping, or other delicatecomponents such as control boards during handling.Wherever possible, all units should be maintained in anupright position and handled by the chassis, plenumsections or as close as possible to the mounting points.In the case of a fully exposed cabinet unit, the unit mustobviously by handled by the exterior casing. Gloves shouldbe worn when handling finished, painted units and shouldnever be set down on unclean, hard surfaces. Failure tofollow these instructions may lead to scratching or gougingof the finished surface.Although Zehnder Rittling does not become involvedwith the design and selection of support methods and/orcomponents, it should be recognized that unacceptableoperating characteristics and/or performance may resultfrom poorly implemented unit support. Additionally, properclearance must be provided for service and removal of theequipment.Anchoring the equipment in place is accomplished by usingthe mounting points provided, and positioning the unit ona LEVEL plane. Vertical units are designed to be bolted tothe wall structure through the slotted wall mounting holes inthe chassis, used for anchoring to pre-installed wall studs.Horizontal units are provided with slotted ceiling mountingbrackets where hanging

Hot water connections 17 Ductwork connections 18 Electrical connections 19 Wiring diagram 20 . Hot water capacity (1 row coil) MBH 16.2 22.4 30.7 45.5 54.8 64.5 80.1 GPM 1.7 2.3 3.2 4.8 5.7 6.7 8.4 . serial tag and should be used when sizing building electrical requirements. ELECTRICAL DATA Motor Type 02 03 04 06 08 10 12 HP PSC