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neptronicTABLE OF CONTENTS National Environmental Products ltd.Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I.1Heater Selection Software . . . . . . . . . . . . . . . . . . . . . . . . . . . I.2Manufacturing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I.3Tel: 1 800 361-2308Fax:(514) 333-3163Customer Service Fax: (514) 333-1091Business hours: from Monday to Friday,8:00A.M. to 5:00P.M.(North American Eastern time)Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II.1Description of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . II.3Mechanical Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . II.5E-Mail: [email protected] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II.6Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II.8Special Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . II.10Materials & Dimensions . . . . . . . . . . . . . . . . . . . . . . . II.11Heating Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II.12Selection & Installation Tips . . . . . . . . . . . . . . . . . . . . . . . . II.14Electrical Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III.1Electric Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III.2Pneumatic Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . III.3Electrical Components . . . . . . . . . . . . . . . . . . . . . . . . . III.4Neptronic HEC Controller . . . . . . . . . . . . . . . . . . . . . . III.7Typical Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . .III.8Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III.10Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.1ON/OFF Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.2White Rogers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.2Honeywell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.3Modulating Thermostats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.4X100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.4DS100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.4PTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV.5Option Summary Sheet & Nomenclature . . . . . . . . . . . . . . . V.1Specification Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V.3Open Coil Element Heater . . . . . . . . . . . . . . . . . . . . . . V.3Tubular Element Heater . . . . . . . . . . . . . . . . . . . . . . . . V.5General Conditions of Sales & Warranty . . . . . . . . . . . . . . . V.7Formulas & Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . V.8Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . annex 1010206Visit our web site at www.neptronic.com

neptronicINTRODUCTION Founded over 30 years ago, the company occupies a modern 80,000 square foot facility on 200,000 square feet ofland. Located in the heart of Montreal, Canada, with easy access to the main throughways and international airports.Over 130 people are employed at the Head Office and Factory.Neptronic is the trade name for a complete range ofproducts available for heating, ventilation and airconditioning applications. Along with electric heaters,NEP designs, manufactures and distributes electricand gas steam humidifier, as well as electronicdamper actuators, actuated valves and controls.NEP holds several patents, notably for theENERDRIVE system, a fail safe device availablein selected damper actuator models as well as forthe AFEC system in the SK300 series electrichumidifier.Recently, 2 more important patents were approved,one for the siphon system for the SKR residentialhumidifier and the latest for the unique HEC electricheater controller.130207Visit our web site at www.neptronic.comI.1

neptronicHEATER SELECTION SOFTWARE Neptronic is the first and only manufacturer of electricheaters to offer to its clients, the possibility to obtainspecifications directly on our web site: www.neptronic.com.Our selection software allows access to technical dataand formulas to specify Neptronic heaters and muchmore.Whether you are an engineer or a contractor, our softwareallows you to very easily select the required electricheater by entering the basic data (duct dimensions, airflow,power, voltage, number of stages, control signals, etc.)from a user friendly window. The selection software thencalculates the optimum specifications for each electricheater.The complete and precise heater specifications, as well as the approval list, may be edited or inserted in theproject file.You are in control of all your projects and will be able toassign your own reference numbers. Modifications aremade directly from your computer.To obtain a price, forward the selected list of heaters to oneof our representatives for fast and efficient service.The unique selection software allows data to be transferredautomatically between the representatives and ourmanufacturing plant, eliminating errors that can arise duringdata transfer.I.2Visit our web site at www.neptronic.com130207

neptronic MANUFACTURINGThe Neptronic electric heater is manufactured using themost advanced technologies available: Total automation from design to production using integratedCAD/CAM systems not only assures maximumefficiency, but also prevents errors in the transfer ofplans and specification data between the client, theR&D department and manufacturing personnel. The most advanced CNC technology for sheet metalfabrication is used in manufacturing the heaters.All these factors were key in designing a complete line ofelectric heaters that are sturdy, easy to install and whichinclude standard features that our competitors offer onlyas options, such as control panel doors with removablehinges.Modern equipment allows us to respond in recordtime to your needs and to the most demandingspecifications.This infrastructure is supported and managed by ourhighly skilled specialists to whom quality workmanshipis of utmost importance.130207Visit our web site at www.neptronic.comI.3

neptronicI.4Visit our web site at www.neptronic.com 010206

neptronicOVERVIEW section II010206Visit our web site at www.neptronic.comII.1

neptronicOVERVIEWDisconnect switch 2 knockoutsSlip-In type frameControlterminal blockLine voltageterminal blockStage fusesTransformerContactorfig.2.1Control panelProtective screenII.2Visit our web site at www.neptronic.com130207

neptronicMagnetic ContactorProvides power to the individualstages of the heater.StandardSolid State Relay (SSR)Proportionally controls theamount of power transmitted tothe heating elements. Allowsquiet operation and is exceptionallyreliable.Standard for proportional heatersPneumatic Electric ControlConverts a proportional pneumaticcontrol signal to a proportionalelectric signal.Standard for proportional unitswith pneumatic signal130207DESCRIPTION OF COMPONENTS TransformerSupplies power to the controlcircuit. Supplied with a fuse.StandardManual Reset ThermalCut-OutA secondary safety device whichremoves power to the elements ifoverheating occurs.Standard when required by code,otherwise optionalDisconnect SwitchCuts the power supply to theheater in order to safely performinstallation and maintenancetasks.Standard when required by code,otherwise optionalAutomatic Reset ThermalCut-OutAn automatic reset, primarysafety device. Removes powerfrom elements if overheatingoccurs.StandardNeptronic HECElectronic ControllerA unique control and safetycomponent. Controls and optimizesthe power transmitted to the heatingelements according to the ducttemperature and air flow.Standard for proportional heaters.FusesProtect the total load and/orthe individual heater stages.Standard when required bycode, otherwise optionalVisit our web site at www.neptronic.comAirflow SwitchSafety component used toprevent a heater from operatingif there is no airflow.Standard for ON/OFF heatersPneumatic Electric SwitchConverts a pneumatic ON/OFFsignal to an electric signal.Standard for heaters withpneumatic ON/OFF signalMercury ContactorProvides power to the individualstages of the heater. Allowsquiet, reliable operation.OptionalII.3

neptronicII.4Visit our web site at www.neptronic.com 010206

neptronic010206 MECHANICAL CONSTRUCTIONVisit our web site at www.neptronic.comII.5

neptronicFRAME Slip-In Electric Heater - Type IThe slip-in type electric heaters are designed so that the entireframe can be inserted into the duct.Advantages of slip-in electric heaters:A system using a slip-in heater permits the installation of theentire ventilation duct system before the heaters becomeavailable. Retrofits are much simpler, smaller dimensionslip-in heaters require no extra supports.To order a Neptronic slip-in heater, specify the dimensions ofthe duct and the selection software will automatically calculatethe optimum heater dimensions.fig.2.2Installation:Allow for a proper sized opening on one side of the duct, see fig. 2.2, as well as installation clearances to avoid anyobstructions around the duct. The Neptronic slip-in heater has a standard 1" (25.4mm) flange on each side of thecontrol box and can be attached directly to the duct with sheet metal screws.Flanged Electric Heater - Type FFlanged heaters are designed so that the heater is an integralpart of the duct work. The heater frame is attached to matchingduct flanges, see fig. 2.3. Standard 1" (25.4mm) on the heaterframe are used to attach it to the duct.Flanged heater dimensions match the dimensions of the duct.Heaters requiring extra support or for large heaters, customflanges can be provided.Installation:fig.2.3The Neptronic electric heater comes with 1" (25.4mm) standard flanges installed around the frame and on each sideof the control box. It can be attached directly onto the duct with sheet metal screws.Note: Round collar option available with flanged electric heater type FII.6Visit our web site at www.neptronic.com130207

neptronicFRAME Round Collar optionRound collar electric heaters are available for installation onround duct systems with a standard diameter of 6" to 24"(152mm to 609mm). They are provided with one male and onefemale adapter for ease of installation.Installation:The Neptronic round collar electric heater comes with a 1"(25.4mm) extension on each side of the frame. The heater isattached directly onto the duct using sheet metal screws.fig.2.4Zero Clearance ConstructionAll Neptronic heaters are designed and approved for zero clearance to combustible material. Zero clearance construction means that there is no restriction on the distance between combustible materials and the section of the duct housingthe heater, or the heater itself. The control panel must be accessible for servicing.Horizontal or Vertical MountingNeptronic electric heaters are designed to be installed in either horizontal or vertical ducts. Please specify the airflowdirection with an H for horizontal and a V for vertical to ensure correct orientation of the components in the nfig.2.5standardfig.2.6Optional Accessories:Protective ScreensOptional protective screens are available to prevent accidental contact with the heating elements.Option 10 or 01: Protective screens on one side only - 10 left of the control panel, 01 right of the control panel.Option 11: Protective screens on both sides of the heater.130207Visit our web site at www.neptronic.comII.7

neptronicCONTROL PANEL Standard Control PanelThe control panel attached to the heater exceeds the frame dimensions by 1" (25.4mm) on the top and bottom. Ifinstallation conditions do not allow for this standard extension a control panel with dimensions equal to the heaterframe can be provided.The standard extension of the control panel is to the left. If installation conditions do not permit the extension to theleft you must specify the direction for the extension of the control panel.Control Panel OptionsBottom Control PanelA bottom control panel can be supplied, when requiredfor easy installation and maintenance.This option is available for all heaters (Slip-in, flangedand round collar) of small dimensions.fig.2.7INSULATION 1” (25.4mm)Insulated Control PanelAn insulated control panel is recommended for high ducttemperatures.Insulation material, 1" (25.4mm) thick is installedbetween the panel and the hot area to prevent condensation on electrical components.fig.2.8Remote Control PanelIn certain cases it may be more convenient to install thecontrol panel remotely from the heater or in a separateroom. A remote control panel can be supplied uponrequest.fig.2.9II.8Visit our web site at www.neptronic.com130207

neptronicCONTROL PANEL Enclosure Types (control panels)Nema 1(IP 10)Protected against accessNema 12(IP 52)Dust-protectedNema 4(IP 56)Protected againstsplashing waterNema 4X(IP 65)Protected against corrosion130207Enclosures constructed for indoor use to provide a degree of protection topersonnel against incidental contact with the enclosed equipment and to providea degree of protection against falling dirt.This enclosure type is standard on Neptronic electric heaters.Enclosures constructed (without knockouts) for indoor use to provide a degreeof protection to personnel against incidental contact with the enclosed equipment;to provide a degree of protection against falling dirt; against circulating dust, lint,fibers, as well as water spray and light splashing of liquids, water infiltration, oilor non corrosive liquid refrigerant.Enclosures constructed for either indoor or outdoor use to provide a degree ofprotection to personnel against incidental contact wi