M1 SERIES DUCT HEATERS

Transcription

1 HEATRIX

2 HEATRIX Electric Duct Heaters may be used with heat pumps, cooling units or any forced air system. Suitable for zero clearance installation with horizontal or vertical air flow. Auto reset primary and manual reset secondary safety devices, serviceable and replaceable in the control panel. Minimum 20 ga. galvanized steel, sufficiently formed and braced to assure structural rigidity of the entire heater assembly. control panel has a false bottom design for cooling effect on mounted components. Heating elements are held in place with shock resistant floating steatite ceramic bushings. Open coil heating elements are made of high grade nickel-chromium. Surface temperature will not exceed 400ºF below the melting point of the element alloy (40-60 watts per sq. in.). Internal wiring is complete and ready for field wiring. Wiring material is copper stranded with 105ºC thermoplastic insulation. All electrical components are U.L. recognized components. Heaters voltage range is from 120V AC-600V AC. KW range from 1KW-1750KW, 1 or 3 Phase 60HZ. Element section is approximately 2 less than duct height and 1 less than duct width. M1 Series duct heaters meet all U.L. and N.E.C. requirements. M1 SERIES DUCT HEATERS LISTED FILE #E 37196/E WELDED CONSTRUCTION CONTROL PANEL SCR CONTROL HEAT SINK (OPTIONAL) HIGH GRADE NICHROME OPEN ELEMENT COIL WATTS PER SQ. IN. FLANGE IN OR OUT FOR ZERO CLEARANCE. AUTOMATIC RESET MANUAL RESET STANDARD AIRFLOW SWITCH (OPTIONAL) RECESSED TERMINAL (OPTIONAL) 7/8 PILOT HOLE FOR EITHER CONTROL OR LINE VOLTAGE HINGED DOOR UNIT UNFUSED DISCONNECT SWITCH (OPTIONAL) WIRING DIAGRAM INTERNAL WIRING WITH 105ºC INSULATION LABELED COVER CIRCUIT FUSING (OPTIONAL) OR CIRCUIT FUSING/NEC LOGIC PANEL (OPTIONAL) PRIMARY FUSING FOR TRANSFORMER (OPTIONAL) FALSE BOTTOM CONSTRUCTION DE-ENERGIZING CONTACTOR CONTROL TRANSFORMER CLASS 1 (OPTIONAL) 20 MSG. MIN. GALVANIZED STEEL

3 HXOB SERIES OVER THE BLOWER LISTED FILE # COL-001A/ CRT-003 ELEMENT FRAME HIGH GRADE NICHROME OPEN COIL ELEMENT AUTOMATIC RESET PRIMARY - MANUAL RESET SECONDARY 1 FLANGE FOR DUCT CONNECTION ELEMENT WRAPPER HINGED CONTROL PANEL DOOR 20 MSG.MIN. GALVANIZED STEEL 1 FLANGE 3-SIDES LATCH ALL WELDED CONSTRUCTION WIRING DIAGRAM I1/2 CONTROL VOLTAGE OPENING 7/8 LINE VOLTAGE OPENING CIRCUIT FUSING (OPTIONAL) CONTROL COMPARTMENT SEQUENCE CONTROL LATCH ELEMENT OPENING MANUAL RESET SECONDARY INTERNAL WIRING WITH 105ºC INSULATION HIGH GRADE NICHROME OPEN COIL ELEMENT 1 FLANGE 3-SIDES DE-ENERGIZING RELAY MIN. 20 MSG. GALVANIZED STEEL CONTROL COMPARTMENT AUTO RESET (PRIMARY) FALSE BOTTOM MOUNTING 1/2 CONTROL VOLTAGE OPENING 7/8 LINE VOLTAGE OPENING HINGED CONTROL PANEL DOOR ALL WELDED CONSTUCTION

4 FORMULAS FOR DESIGN The basics of electricity consist of: Voltage, Power resistance and Current. Any one of these can be found if any wo are know. A watt is a measure of electric power and thus is the output of the heat in a resistance hetaer. Voltage and Current produce a watt. KW = 1000 watts (1 kw = 3,413 BTUH) CFM = Cubic Feet per Minute (a measure of the quantity of air) FPM = Feet per Minute (a measure of the speed of air) rt = Delta Temperature (difference between entering & leaving air) A = Area (length x with in square inches; to convert to square feet, divide square inches by 144) Volts x Volts Watts = ohms FPM = CFM Area (Sq. Ft.) Watts = Volts x Amps W = V x 1 CFM = Area (Sq. Ft.) x FPM Amps (1PHASE) = Watts Volts Amps (3PHASE) = Watts Volts. Volts = Watts Amps CFM = KW x 3413 rt (1.08) rt = KW x 3413 CFM (1.08) KW = KW x rt x

5 245 SOUTH WEST 33rd STREET FORT LAUDERDALE FLORIDA (954) FAX (954) ALL U.S.A. TOLL FREE ELECTRIC DUCT HEATERS and O.E.M. PRODUCT LINE HEATERS Slip-In Mount Flanged Mount Bottom/Top Mount Remote Panel Style Round Duct Mount Fan Discharge Mount Weatherproof - Outdoor Application Preheat/Reheat Modular Sections Finned Tubular Duct Heaters Custom Modular Heaters Air Handling Units Industrial Forced air Systems All-Stainless Steel Construction Multi-Zone Application VAV Application Take Advantage of Our Plan & Spec. Service Department Us at sales@dellheatrix.com The Heater Schedule and Specifications... You ll Get a Price Quote Back Immediately Submittals, Diagrams - Immediately STANDARD LEAD TIME: SHIP 4 WEEKS A.R.O. FAST SHIP PROGRAMS - AT EXTRA CHARGE Consult The Factory

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7 DUCT HEATERS FEATURES U.L. LISTED FILE #E 37196/E E.T.L. LISTED FILE # COL-001A/ CRT-003 SUITABLE FOR ZERO CLEARANCE INSTALLATIONS STANDARD STANDARD EQUIPMENT EQUIPMENT Min. 20 GA Galvanized Steel False Bottom Construction Double Thermal Protection Hinged Cover High Grade Element Wire 24 Volt Control Air Pressure Switch High Voltage Terminal Low Voltage Terminal Wiring Diagram Inside Cover Circuit Fusing Per N.E.C. OPTIONAL EQUIPMENT REMOTE CONTROL PANEL RECESSED CONTROL PANEL ADJUSTABLE AIR PRESSURE SWITCH TRANSFORMER CLASS 2 TRANSFORMER CLASS 1 CIRCUIT FUSING FINNED TUBULAR ELEMENT STAINLESS STEEL TERMINALS SCR CONTROLLER STEP CONTROLLER MERCURY CONTACTORS MAGNETIC CONTACTORS PILOT LIGHTS TIME DELAY LOW WATT DENSITY COILS ALL STAINLESS STEEL FAN RELAY NEMA 4/4X TERMINAL ENCLOSURE NEMA 4/4X REMOTE PANEL SINGLE POINT CONNECTION FOR HEATER AND FAN HXOB HEATERS ONLY TOLL FREE

8 EXPLANATION OF MODELS M1 MODELS M1 Model includes manual reset in the power circuit with an automatic reset in the control circuit. All accessories are available with this model. MF1 MODELS Same as M1 Model except used for flanged mounting to duct work. MH1 MODELS Same as M1 Model but includes remote panel. MHF1 MODELS Same as MF1 Model but includes remote panel. OM MODELS OM followed by 1, F1, H1,OR HF1 Includes NEMA 4 rated terminal enclosure for outdoor use. OCPR MODELS NEMA 4 rated remote panel for outdoor use. MM1 MODELS Modular heaters for installation in module type units. MMH1 MODELS Modular heater with remote panel. OMM1 MODELS Modular heater with NEMA 4 rated termianl enclosure for outdoor use. OMMH1 MODELS Same as OMM1 but includes remote panel. HXOB MODELS For close coupled installations mounts directly on the fan discharge. Also available with remote panel. TOLL FREE

9 HOW TO ORDER 1) TYPE OF HEATER REQUIRED M1, MH1, MF1, MHF1, OM Series, HXOB Series 2) DUCT SIZE (Outside dimension of duct must be known and whether or not there is internal liner) HEIGHT X WIDTH HXOB = Unit model, and discharge arrangement must be known. 3) KW Must be known 4) LIne voltage, Single or three Phase (110 thru 600 volts) 5) CONTROL voltage (Standard is 24 volts thru 277 volts) 6) STAGES REQUIRED 7) CIRCUIT FUSING (MUST BE INCLUDED IF HEATER DRAWS 48 AMPS OR MORE) 8) AIR PRESSURE SWITCH OR FAN RELAY (YOU MUST INCLUDE ONE OF THESE TO MEET U.L.) 9) OTHER ACCESSORIES NEEDED TO MEET SPECS PER ENGINEER, PLANNER, OR CUSTOMER AS THEY MAY REQUIRE 10) TYPICAL MODEL NUMBER TYPE DUCT SIZE (HxW) KW VOLTAGE PHASE STAGES M TYPE UNIT MODEDL KW VOLTAGE PHASE STAGES HXOB 36BVX TOLL FREE

10 WHAT THE WHOLESALER, DISTRIBUTOR OR COUNTERMAN MUST KNOW - BEFORE SELLING A HEATRIX DUCT HEATER 1. How many Kilowatts (KW)? What line voltage, cycles, phase? 3. What control voltage? What duct size? (Dim. in inches).. a. Horizontal (width x height) Control panel on the height Width is the insertion... b. Vertical (width x height) Control panel on the height Depth is the insertion What type of construction? Check one. a. Slip-In (Model M1)... b. Flange Mount 1 (Model MF1)... c. Slip-In with remote panel (Model MH1) (Model MR)... d. Flanged 1: with remote panel (Model MHF1) (Model MR)... e. Top/Bottom Mount Application Heaters require either a fan interlock relay or an air pressure switch for interlock to meet code & UL. Fan Interlock relay?... A/P Switch? Heaters drawing 48 amps or more, total load, must have their circuits fused by the manufacturer. Under 48 amps, they do not! Fuse the circuits?... Do not fuse? Do you need a control transormer to get your low voltage control or is ther already on in the system? Need a transformer... Don t need transformer How many steps or stages in the heater? MAXIMUM KW PER STEP OR STAGE 120 VOLT 1 PHASE 5.5 KW 208 VOLT 1 PHASE 9.8 KW 240 VOLT 1 PHASE 11.5 KW 277 VOLT 1 PHASE 13.0 KW 208 VOLT 3 PHASE 15.0 KW 240 VOLT 3 PHASE 17.0 KW 480 VOLT 3 PHASE 25.0 KW 6. What type of ductwork? a. Sheet Metal, No Insulation... b. Sheet Metal, Internally Lined... c. Sheet Metal, Externally Wrap... d. Fiber Board Other optional controls or remarks? TOLL FREE

11 DUCT HEATER CONSTRUCTION ALL HEATRIX DUCT HEATERS ARE BUILT TO CONFORM TO U. L. AND N. E. C. REQUIREMENTS AND ARE LISTED FOR ZERO CLEARANCE heating elements open coil Heaters shall be built using Type C Nichrome wire supported in a ceramic steatite floating bushing. The ceramics are then supported by a galvanized steel frame. Standard spacing for element cross supports is 3 inches on center. Element frame assemblies are then mounted into a galvanized steel wrap. GRADE A WIRE IS AVAILABLE WHEN REQUESTED. OVER TEMPERATURE PROTECTION All duct heaters are furnished with an automatic disc type thermal cutout for primary protection, with a manually resetable disc type thermal cutout for secondary protection. INTERNAL WIRING All wiring used shall be U. L. Listed copper105 C stranded wire. OVER CURRENT PROTECTION All heaters shall be fused in accordance with applicable U. L. standards and the national electric code. Circuit fusing is required when a duct heater circuit or circuits exceed 47.9 amps. If the circuit does not exceed 47.9 amps then circuit fusing is not required by code but may be added as a factory installed option. CONTROLS Numerous control options are available for Heatrix Duct Heaters. All options are listed in this catalog. All components used are U. L./C. S. A. Listed. CONTRACTORS, MAGNETIC DE-ENERGIZING, DISCONNECTING All duct heaters are wired with de-energizing magnetic type contactors, unless specified by customer to be magnetic disconnecting type. (Mercury contactors may be used in lieu of magnetic, but only if specified by customer). AIRFLOW SAFETY INTERLOCKS All duct heaters must be provided with one of the following: A) Differential pressure switch (airflow switch which senses from.05 to 12 W. C. +/-.02 W. C.) which is non adjustable. If the pressure in the duct system is less than.07 W. C. we recommend a fan interlocking relay be used in lieu of the pressure switch. B) A fan interlock relay is available in lieu of the standard pressure switch to interlock the heater with the fan circuit. TOLL FREE

12 FIELD WIRING All heaters will be furnished with line terminals capable of handling 125% of the connected load. Heaters requiring larger than 500 MCM incoming field feed will be subdivided into smaller feeds to meet U. L. requirements. CONTROL PANEL CONSTRUCTION A minimum of 20 gauge galvanized steel is used in construction of all heaters, heavier gauges are used on larger models. Heaters include spot welded construction, false bottom on M Models, continuous nickel plated hinged cover for control panels on all models. M Models that do not include a door interlock disconnect switch incorporate a spring loaded latching device in the cover assembly. SPECIAL CONSTRUCTION Recessed elements for internally lined ducts. Flanged Mounting. Bottom or top mounting in duct. Outdoor enclosures. Modular heaters. HXOB type for mounting directly to the fan discharge. Remote control boxes. HEATING ELEMENTS Heatrix Heaters use an open coil electric heating element design. Standard elements are made of nickel chromium alloy grade C, which is 60% nickel, 20% chromium and 20% iron. This element has excellent heat resisting properties and is rated up to 1700 degrees fahrenheit. As an option, grade A wire, better known as 80/20 wire, which is 80% nickel and 20% chromium may be used. It is essentially iron free and has rating up to 2100 degrees fahrenheit. Elements are held in place by ceramic steatite floating bushings spot welded into a galvanized steel frame with cross supports no more than 4 inches on center. Elements are terminated with zinc plated studs by nuts and bolts interlocked thru ceramics bases. Stainless steel terminals are standard. Unless otherwise specified a watt density of watts per square inch is used in the design of Heatrix Heaters. Lower watt density / derated coils are available as an option. TOLL FREE

13 OVER TEMPERATURE PROTECTION Both U.L. and N.E.C. require two types of over temperature protection. The primary system is an automatic reset and is designed to de-energize the control circuit of the heater if an air circulation problem arises in the duct system. The secondary or manual reset is designed to de-energize the heater element at a higher temperature in the event of a failure in the primary system. Manual resets can be put back in operation by pressing the reset button found in the heater terminal box. However, the disc must be at a safe temperature before resetting. Manual resets are wired in the power legs. Primary and secondary over temperature devices should not be bypassed in the field because of cycling or tripping out. These devices are put there for safety reasons. If a heater has a cycling problem the problem should be eliminated. First check installation of heater, air flow, air blockage, and insufficient air. If the problem still persists, call our engineering staff and they will try to resolve any problem you have in the field. TOLL FREE

14 MAGNETIC CONTACTORS Magnetic contactors are standard in al Heatrix Heaters. One, two and three pole contactors are available with control voltages ranging from 24 volts to 277 bolts. 24 volts is standard unless specified differently. All heaters are wired using de-energizing contacts, unless specified. Disconnecting caution must be taken when using de-energizing contactors, One end of each element remains electrically hot unless a safety disconnect serving the heater is off. Mercury CONTACTORS Mercury contactors are normally used when a control system requires frequent cycles or when quiet operation is essential. Mercury contactors are more durable and have longer life expectancy than magnetic contactors. Holding coil voltages range from 24 volts to 277 volts. Since mercury contactors are position sensitive, it is of the utmost importance that installation is done according to labels found in every Heatrix Heater. Installer must install heater in position of arrow on the heater. TOLL FREE

15 AIRFLOW SWITCH Airflow switches provide the best heater protection against element failure. Airflow switches are of the pressure differential diaphragm operating type. They have proven reliable in many different operations. The air pressure switch has a built in diaphragm that senses static pressure. A pressure level below the setting of the air pressure switch immediately de-energizes the heater. For proper operation of the switch, there must be at least.03 water pressure difference between the inside and outside of the duct system. Adjustable switches are available, but please specify when ordering. Heaters are set up for a POSITIVE PRESSURE blow thru system. If the heater is mounted before the fan supply (draw thru system) A/P switch must be set up for negative pressure. FAN INTERLOCKING RELAY If the air pressure switch is not used, a fan interlocking relay is used to comply to U.L. and N.E.C. requirements. The fan relay coil is wired with the first stage of heat. If for any reason the automatic switch opens due to over heating, the fan circuit will continue to operate. The fan relay must be wired to the external fan circuit to comply with U.L. requirements. TOLL FREE

16 CIRCUIT FUSING Built in circuit fusing can be furnished in all Heatrix Heaters. However, if the total load of the heater exceeds 47.9 amps, there must be sub-circuit over current protection provided either in the heater control panel or the remote panel for the heater. Circuit fusing can be used, but is not required by U.L. or N.E.C. when heaters are under 48 amps total load. The following chart will help you find the maximum KW that can be used on each heater without the mandatory circuit fusing. MAXIMUM KW PER HEATER THAT DOES NOT REQUIRE CIRCUIT FUSING SINGLE PHASE THREE PHASE 120V V V V V V V V TOLL FREE

17 TRANSFORMERS Transformers are required when control voltage sources are not available and the line voltage differs from the control voltage. Primary voltages of volts are available with secondary or control voltage 24V - 227V. The primary of the transformer is supplied by the line voltage and the secondary of the transformer furnishes the control voltage. BOTH CLASS 1 AND CLASS 2 TRANSFORMERS ARE USED IN HEATRIX HEATERS. CLASS 1 - Class 1 transformers are used when control circuit is over 4 steps of heat, when the secondary voltage is greater than 24 volts or when specified. On Class 1 transformers, primary and secondary fuses are included. CLASS 2 - Class 2 transformers are used when secondary voltage is 24 volts only. A Class 2 transformer can be up to 4 steps of heat. After 4 steps, a Class 1 transformer is used. Secondary fusing on a Class 2 transformer is internal and cannot be replaced. External primary fusing can be included on Class 2 transformers as an option. TOLL FREE

18 DOOR INTERLOCK DISCONNECTS A door interlock disconnect switch prevents the terminal box cover from being opened unless the switch is first turned off. When in the off position the switch will disconnect all electrical circuits. However in some cases where the control voltage is supplied by an outside source the disconnect will not de-energize this circuit. Disconnects may be fused or unfused per your specifications. NOTE: A fused disconnect does not take place of circuit fusing on heaters which draw over 47.9 AMPS. TOLL FREE

19 TERMINAL BLOCKS Line voltage terminal blocks and control terminal strips are used in all Heatrix Heaters. All blocks are sized 125% above the connected load and are secured to a false bottom. On heaters containing a disconnect switch the lugs of the switch serve as the line voltage connection. As per U.L. Heatrix Heaters shall be provided with a single line voltage connection up to 500 MCM, above 500 MCM line voltage connections will be sub divided into smaller connected loads. TOLL FREE

20 SINGLE POINT LINE CONNECTION FOR HEATER AND FAN ON HXOB MODELS ONLY On HXOB models Heatrix Heaters have the ability to provide as an option a single point connection to supply power to the fan motor. There are three different types of circuits available. 1) Basic line terminal tapped off the main line terminal in the electric heater. 2) Fused fan motor circuit. 3) Fused fan motor circuit with contactor for the motor. NOTE: AMPACITIES OF MOTORS MUST BE KNOW FOR PROPER LABELING TOLL FREE

21 CIRCUIT BREAKERS Circuit breakers can take place of fuses for sub circuit protection per U.L./N.E.C. requirements. The handle can be internal or external in mounting, however if mounting external to the cover of the heater this does not take place of a door interlock disconnect switch. TOLL FREE

22 PILOT LIGHTS Following is a list of pilot light functions which can be added to all Heatrix Duct Heaters. 1) Power on 2) Control on 3) No air flow 4) Over temperature (Primary cutout open) Lights are red in color but can be ordered in other colors if specified. TOLL FREE

23 PNEUMATIC ELECTRIC SWITCH When the control system is pneumatic, a PE switch is required to change the compressed air signal to an electrical signal as the pneumatic system calls for an air pressure change, the PE switch opens or closes an electrical signal to the coil on the contactor. TOLL FREE

24 ENGINEERING SPECIFICATIONS HEATRIX HEATERS SHALL BE AS MANUFACTURED BY DELL CORPORATION Electric Heaters shall be of the size, type and capacity as shown on the schedule. Heaters shall be U.L./E.T.L. listed for zero clearance installations and shall meet the requirement of the National Electric Code and U.L Elements shall be of high grade nickel-chromium wire supported in a ceramic steatite floating bushing cross supports shall be galvanized steel spaced no more than four inches apart on center. Heater frames and terminal boxes shall be a minimum 20 gauge galvanized steel. Terminal boxes shall include a false bottom and hinged latching cover. Each heater shall be furnished with primary and secondary over temperature safety devices, serviceable through the terminal box without removing the heater from the duct work. The primary device shall be disc type automatic reset that will de-energize the control circuit upon over heating. The secondary device shall be a disc type manual reset connected to the power lines which will open the circuit and de-energize the heating elements should the primary device fail. Terminal blocks shall be provide for all field wiring and shall be sized 125% above the connected load. Over current protection shall be provided for all heaters with a total load of 48 amps or more. Heaters shall be furnished with all necessary components to conform with the schedule. Each heater shall be furnished with a wiring diagram affixed to the inside of the hinged latching cover. TOLL FREE

25 THREE PHASE AMPERAGE TOLL FREE V V V V V V V V V V KW

26 KW SINGLE PHASE AMPERAGE TOLL FREE V V V V V V V V V V V V

27 wire size for field wiring for minimum 75ºC awg copper TOTAL AMPS AWG# O OO OOO OOOO MCM MCM MCM MCM MCM TOLL FREE

28 MINIMUM AIR VELOCITY For longer coil life and satisfactory heater performance, each heater is labeled with the minimum air velocity. Air velocity should not fall below these figures. If for any reason these figures can not be reached, contact the factory. To find your minimum FPM rating for a heater, follow the steps below. 1) Take outside duct size (H x W) and multiply by ) Divide that figure by ) Take Watts and divide by figure in step 2. This would give you watts per square feet. 4) Go to the chart and find your FPM per inlet air. EXAMPLE: Duct size (H x W) 12 x 24 with 20KW (12 x 24 x 1000)/144 = 2000 square feet 20,000 watts/2000 square feet = = 825 FPM at 77º and 1225 FPM at 100ºF H x W x 1000/144 = square feet watts/square feet = watts per square feet MINIMUM AIR VELOCITY - FPM KW PER FPM FPM KW PER FPM FPM KW PER FPM FPM SQ. FT. 77ºF 100ºF SQ. FT. 77ºF 100ºF SQ. FT. 77ºF 100ºF Converting FPM to CFM (square inch [of duct work) x FPM]/144 = CFM TOLL FREE

29 PRESSURE DROP PRESSURE VELOCITY (IN. OF WATER) (FPM) Static Pressure drop through an open-coil heater is quite low and in most cases can be ignored when calculating system pressure drop TOLL FREE

30 ELECTRIC DUCT HEATER SUBMITTAL U.L. LISTED FILE #E 37196/E E.T.L. LISTED FILE # COL-001A/ CRT-003 SUITABLE FOR ZERO CLEARANCE. STANDARD FEATURES Automatic Resets Manual Resets in Power Legs Terminal Block for Power and Control Circuit High Grade Nichrome Open Element Coil. Completely Pre-wired. OPTIONAL FEATURES q Fan Interlock Relay q Air Flow Switch Non Adj. q Positive Pressure System q Negative Pressure System q Control Transformer Class 1 V q Control Transformer Class 2 q Primary Fusing of Transformer q Secondary Fusing of Transformer q De-energizing Contactor q Disconnecting Contactor q Semi-Quiet Relay q Mercury Contactor q Back-up Contactor q Time Delay Between Steps q Dust Tight Terminal Cover q Circuit Fusing per N.E.C. q Circuit Fusing q Circuit Breaker q Fused Door Interlocking q Room Thermostat q Duct Thermostat q 1-Step Wall-Mount Thermostat q 100% SCR Controllers q Vernier SCR q P.E. Per Step q P.E. Close on Pressure Rise q Pilot Lights Indicating Power On q Pilot Lights Indicating Steps On q Pilot Lights Indicating No Air Flow q Pilot Lights Indicating Over-Heat q Toggle Switch for Control Circuit q Slip-In Construction (Fig. #1) q Flange Mount (Fig. #2) q Bottom/Top Mount (Fig.#3) q Remote Control Panel (Fig.#4) q Heater Wrap Centered on Control Box q Round Duct Heater w/transition q Stainless Steel Control Panel q Screw On Cover (Not UL on M-Series) q Outdoor Control Panel NEMA 4 q Recessed Terminal Control Panel q 80/20 Wire q 35W/Sq. In. Element Wire q 25W/Sq. In. Element Wire q Stainless Steel Terminal q Insulated Control Panel q Protective Screen on Air Exiting Side q Hinge Cover - Looking Into Control Box q Left Side q Right Side q Top Side q Bottom Side TOLL FREE

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33 HEATRIX HXOB STANDARD FEATURES ETL LISTED HXOB SERIES FOR FAN DISCHARGE #20 GALVANIZED STEEL CONTROL BOX WITH HINGED COVER POWER AND CONTROL TERMINAL BLOCKS SEQUENCERS OR CONTRACTORS FAN INTERLOCK RELAY AUTOMATIC AND MANUAL RESET 208, 240, 277, 380, 460/480 VOLTS 1 AND 3 PHASE UNIT CIRCUIT FUSING PER NEC & UL 24V CONTROL VOLTAGE HIGH GRADE NICHROME ELEMENT WIRE TOLL FREE

34 HEATRIX HXOB STANDARD FEATURES ETL LISTED HXOB SERIES FOR FAN DISCHARGE ETL #20 GALVANIZED STEEL CONTROL BOX WITH HINGED COVER POWER AND CONTROL TERMINAL BLOCKS SEQUENCERS OR CONTRACTORS FAN INTERLOCK RELAY AUTOMATIC AND MANUAL RESET 208, 240, 277, 380, 460/480 VOLTS 1 AND 3 PHASE UNIT CIRCUIT FUSING PER NEC & UL 24V CONTROL VOLTAGE HIGH GRADE NICHROME ELEMENT WIRE TOLL FREE

35 HEATRIX HXOB STANDARD FEATURES ETL ETL LISTED HXOB SERIES FOR FAN DISCHARGE #20 GALVANIZED STEEL CONTROL BOX WITH HINGED COVER POWER AND CONTROL TERMINAL BLOCKS SEQUENCERS OR CONTRACTORS FAN INTERLOCK RELAY AUTOMATIC AND MANUAL RESET 208, 240, 277, 380, 460/480 VOLTS 1 AND 3 PHASE UNIT CIRCUIT FUSING PER NEC & UL 24V CONTROL VOLTAGE HIGH GRADE NICHROME ELEMENT WIRE TOLL FREE

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37 INSTALLATION O & M MANUAL HEATRIX RDH Series Electric Duct Heaters - Round Ducts These duct heaters utilize the U.L. Listed M1 or MH1 slip-in style heater, factory installed in an insulated round duct plenum, with a 2 inch round collar on the air entering and air leaving sides of the plenum. The M1 style has an integral control panel - the MH1 style has a remote control panel. These heaters are U.L. Listed for zero clearance, suitable for installation in horizontal or vertical ducts, with any forced air system. 1. Install this heater a minimum of 4 feet from heat pumps or air conditioners. 2. Install this heater a minimum of 2 feet from air handler or forced air system. 3. Install this heater a minimum of 2 feet on either side of an elbow or turn. 4. All other installation requirements are to be found in the National Electrical Code Handbook in accordance with NFPA 90A & 90B and the SMACNA ducted electric heat guide for air handling systems. RDH series heaters come with electrical & velocity requirements on the hinged cover of the heater, as well as a wire diagram. Air flow and position arrows must be followed exactly! INSTALLER MUST TIGHTEN ALL ELECTRICAL CONNECTIONS IN CONTROL PANEL. AIRFLOW 2 COLLAR ON INLET AND DISCHARGE ENDS WIRE SIZE FOR FIELD WIRING FOR MINIMUM 75ºC AWG COPPER TOTAL AMPS AWG# O OO OOO OOOO MCM MCM MCM MCM MCM MINIMUM AIR VELOCITY - FPM KW PER FPM FPM KW PER FPM FPM KW PER FPM FPM SQ. FT. 77ºF 100ºF SQ. FT. 77ºF 100ºF SQ. FT. 77ºF 100ºF Converting FPM to CFM (square inch [of duct work) x FPM]/144 = CFM TOLL FREE

38 APPLICATION Design to house electrical and electronic control, instruments and components indoor or outdoor areas where dirt, dust, oil, water or other contaminants are present. Also suitable areas which may be regularly hosed down. Smooth blended surfaces and attractive finish compliment high tech electronic equipment. CONSTRUCTION 14 gauge or 16 gauge steel body with integral trough offset. 90 degree opening door with zero clearance. 180 degree opening with full clearance. Compression stops maintain optimum gasket performance. Full line of field installable (no lay-out or drilling) accessories. Removable and interchangeable doors with zinc diecast hinges. Body and door ground studs provide positive ground. Slotted quarter-turn oil-tight latch with optional tamper resistant and key latches available. Housing made of polyamide. Data pocket is high-impact thermoplastic. FINISH ANSI 61 Gray or textured beige polyester powder inside and out over phosphatized surfaces. NEMA 4 REMOTE CONTROL PANEL FOR OUTDOOR APPLICATION TOLL FREE

39 Applications Ducted electric heaters can be used as a heat source in many different locations in an air handling system. The features which afford flexibility of application as a heat source are: 1 The quick response and ease of control which is provided by the direct conversion of electrical energy to heat energy. 2 The ease of installation of a small and compact self- contained unit which requires only electrical connections to power and control circuits. 3 The suitability for adaptation in an existing duct system (as well as a new system) to provide additional, supplementary or auxiliary heat for new requirements or present inadequacies-with minimal changes in the existing system. Primary Heat An electric heater is considered to supply primary heating when used in conjunction with an air handling unit or air conditioning unit to provide the first or basic heat for the entire system. Preheat An electric heater is considered to provide preheating when it is used to temper air as it enters the air distribution system or in advance of other processes of tempering air. It is often used to raise the temperature of fresh outside air being introduced into the air handling system. Reheat An electric heater is considered to provide reheating when it is used in a duct system to raise the temperature of air that has been previously conditioned by other processing. Reheat is often used: a) in individual zone control in air conditioning systems requiring air supplied in different temperatures in various areas of the building; b) in conjunction with cooling coils in the control of humidity. In controlling humidity, it is frequently necessary to remove moisture from the air by lowering the air temperature below the temperature desired to be delivered to the space. Reheating is then used to deliver air at the desired temperature. Supplemental Auxiliary Heat An electric heater is considered to provide supplemental or auxiliary heat when it is used to meet temporary heating load requirements in an air system. The heater may be an emergency or peak-load standby source. Electric heaters are often used with heat pumps to meet peak load demand. An electric duct heater may: a) provide precision heating for proper space control by meeting fluctuating heating load demand; b) maintain desired temperatures in small chambers; and c) have many other applications. The information and recommendations in this guide are applicable to low velocity (2000 F.P.M. or less) and low pressure (2 w.g. or less) systems. Velocity Since an electric duct heater has a constant BTU output as long as the heater is energized, minimum air velocity through the heater must be maintained in order to : a) achieve good heat transfer, b) prevent overheating and nuisance tripping of the protection devices ; and c) maintain life expectancy. TOLL FREE

40 The average velocity in the duct determined from the formula below should be compared with the minimum velocity recommended by the heater manufacturer for the application. Since most manufacturers relate kilowatts per square foot of duct area and air temperature rise crossing the heater to minimum velocity requirements, the selection can be readily verified in the manufacturer s catalog date. VELOCITY = CFM/ DUCT AREA HOWEVER, THE VELOCITY IN THE DUCT SHOULD NOT BE BELOW THE MINIMUM AT ANY POINT ACROSS THE FACE OF THE HEATER. Flow conditions should be studied carefully to determine if localized velocities within the coil face area are likely to be below the minimum. Air Flow Direction Air flow direction is determined by facing the terminal box side of the duct, and it should be specified for all types of heaters. The manufacturer and installer should know whether the air flow is horizontal ( and to the right or left ) or vertical ( and up or down ) since safety devices are located differently in each case. Furthermore, since terminal boxes vary in width and since space conditions may be limited, the terminal box overhang should be designated as left hand or right hand. Location After determining the use of a heater, a location in the air system must be selected which will permit satisfactory performance. The heater must be installed in a location having suitable air flow characteristics.where non-uniform air flow conditions exist at duct fittings, at the equipment connections or at air terminals, etc, minimum lengths of straight runs of duct must be installed before and after the heater. When electric heater are used in preheat or reheat applications in plenums or casings, a special study of the location is recommended. Irregular air flow patterns are often found in the air movement through outside air louvers, filters, mixed air plenums and associated dampers. At fresh air intakes, for example, the air entry should be rain-tight. As a precaution against water damage, it is recommended that the bottom elevation of the electric heater be above the floor. Another important consideration is the safety of individuals entering a plenum or casing chamber. Reasonable provisions for protection should be made and these should include warning signs outside of the electric coil chamber. Other factors to be considered in locating the heaters are: a) Heat loss from the duct before the tempered air reaches its destination. b) The temperature and humidity of the space surrounding the heater. If a section of the duct containing an electric heater is installed in an atmosphere conducive to the collection of moisture either inside the duct or on the outside of the duct, special provisions must be made to insure that moisture does not damage either the heater or the controls. c) The accessibility of the heater and its control panels. Terminal boxes are often integral with the heater and may exceed the height of the duct. The total installation must be designed to accommodate the space and access requirements of this component. Remote control panels may be used where conditions dictate. d) Hazards. To avoid damage and insure safety, special consideration must be given to the proximity of combustible material. Minimum clearance required by the manufacturer or applicable codes, whichever is greater, must be maintained. TOLL FREE

41 INSTALLATION INSTRUCTIONS These duct heaters may be used with heat pumps, cooling units, or with any forced air systems. They are suitable for zero clearance installation in vertical or horizontal duct systems. MODEL NUMBER SYSTEMS The series M,means that,manual reset thermal switches are used for back-up protection. MH1= MHF1= MR1= Manual heater requiring a (MR) remote panel. Manual heater, flanged mount, requiring a MR remote panel. Remote panel for any heater using Model Number MH. Each MH1 or MHF1 will carry a model and serial number. The MR1 remote panel must be built for that particular MH1 or MHF1 heater and carry the same information and serial number as the heater. MF1= Manual heater, flanged mount; no MR panel required. M1= Manual heater, slip-in, custom built/ no MR panel required. WHEN ORDERING M1 MODEL 1, Select KW. Maximum 1740 KW. 2. Select line voltage. 3. Select control voltage. 4. Dimensions: Height x Width (maximum 10 wide). Example: MH (10KW, 240 Volt, Three Phase); the control box would be built on the 18 dimension and the 20 dimension would be the insertion into the duct. 5. Stages required. 6. Accessories: The M Model can be built using circuit fusing, transformer, air pressure switch, fan relay, P.E. switches, time delays, pilot relays, pilot lights, modulating sequencers, disconnect switches (fused and unfused), mercury contactors, fan-off delay, circuit breakers and back-up contactors. All accessories are U.L. listed components. INSTALLATION For best performance, the duct heaters should be installed 4 feet downstream of the air handler an heat pump. Heatrix Heaters are designed for left-hand or right-hand mount, except when mercury contactors are used. However, all heaters carry an air flow label and must be installed per this label. Any remote control or heater control panel using mercury contactors must be mounted per the labels on the heater showing THIS SIDE UP. TOLL FREE

42 CONTROL PANEL ** DO NOT INSULATE OR ENCLOSE HEATER CONTROL BOX** Installation of the slip-in heater consist of cutting an opening in the duct that will clear the heater frame enclosure. Insert heater and fasten to the duct through the mounting holes in the control box. For installation of the flange mount heater, the heater will have a flange turned out on the duct. This arrangement makes the heater actually become a part of the duct. Air flow and patterns of air flow are very important to the heater working correctly. This is to insure the life of the heating elements and to prevent nuisance tripping. Heatrix Heaters carry a label showing minimum air flow that can be used to operate heaters correctly by showing entering air at two different temperatures. These minimum air velocities or C.F.M. must be in a pattern that covers the entire surface of the heater. Field wire the supply and control circuit in accordance with national and local electrical codes. Each heater carries a wiring diagram designed for that particular heater showing the manner in which each duct heater must be connected externally to be properly interlocked with the blower motor (if the blower motor control is not actually a part of the duct heater assembly), unless the duct heater is provided with an integral air pressure switch. Installer must tighten all electrical connections in control panel. The air duct should be installed in accordance with standards of the National Fire Protection Association for the installation of air conditioning and ventilating systems of other than residence-type NFPA #90A and residence-type warm air heating and air conditioning systems NFPA #90B. insulated duct When duct is lined with insulation inside or outside, please specify. Heatrix Heaters can be built with a recessed control panel, the thickness of the insulation. This recess of the limit control part of the heater will insure the limits being in position to receive the air pattern across the entire surface of the heater. To install this type of heater, cut an opening in the duct and insulation, the required size to receive the wrapper, slip heater in and mount the control box with screws. If fiber duct is used, the same steps must be followed. The heater must be braced with straps or other means of support to prevent the duct from sagging. DO NOT INSTALL MR (REMOTE PANEL) ON DUCT OR WHERE TEMP. ABOVE 75º DO NOT INSULATE OR ENCLOSE CONTROL BOX OR PANEL TOLL FREE

43 HEATER INSTALLATION SLIP-IN HEATER FLANGE HEATER To install slip-in heater: cut an opening in the side of the duct. Slide heater in the duct; used control compartments as template to drill mounting screw holes. Attach heater to duct with sheet metal screws. Connect high and low voltage and fan interlock lead wires. Larger heaters may require hanger straps or other suitable reinforcement. Seal joints with duct tape, if required. Concentric power supply knockouts are 7/8, 1 1/4, 1 3/8, 1 3/4. Control knockout if 7/8. To install flange heater: at heater location, layout duct work to match heater frame dimensions (W and H). Form mounting flanges on edges of duct. For additional strength, the duct flange should be doubled as show in the drawing. Position heater in duct and attach duct flanges to theater flanges with sheet metal screws. For large heater, the additional with may require hinge strap or other suitable reinforcement. When required, the joint between the duct and heater flanges may be sealed with duct tape. Concentric power supply knock outs are 7/8, 1 1/4, 1 3/8, 1 3/4. Control knockout if 7/8. MIN. 2 turning vane 2 AIR HANDLER OR FORCED AIR SYSTEM 4 AIR CONDITIONER OR HEAT PUMP Duct heaters should be installed at least 2 on either side of an elbow. Turning vanes installed in the elbow will reduce pressure losses and insure that the air velocity is uniformly distributed over the cross section of the duct. Duct heaters should be installed at least 4 downstream or upstream from any air conditioner or heat pump. They should be installed at least 2 upstream or downstream from any air handler., forced air system, filer, humidifier or changes in duct size, or directional change of duct. When flexible duct connector is used to dampen equipment vibrations the duct heater should be installed at least 18 away upstream or downstream. Any and all connections should be installed per local codes and national codes meeting NFPA 90A or NFPA 90B standards. TOLL FREE

44 HEATRIX ELECTRIC DUCT HEATER HXOB INSTALLATION INSTRUCTIONS GENERAL Heatrix HXOB style electric duct heater has been tested and listed for close-coupled application with a forced air system (straight cool, heat pump or fan coil). To insure proper operation of the heater, installation instruction must be carefully followed. Failure to do so will result in an unsafe condition and nuisance tripping of the automatic reset and manual backup switches. These instructions cover the installation of the HXOB style electric duct hearer. Heaters will vary from KW, voltage, phase and physical opening (see heater label for information and specific applications). INSTALLATION PROCEDURES The Heatrix HXOB style electric duct heater is designed for zero clearance to combustible material. However, we recommend a minimum clearance of one inch be maintained on all sides of the supply duct for three feet. For extra protection where a discharge plenum forms part of the duct work, it too should have a one inch clearance on all sides. Before starting electric heater installation,be assured that available power supply (voltage, phase and frequency) corresponds to that specified n electric heater rating plate. In addition, check power supply available to make certain that the service capacity is sufficient to handle the load imposed by the equipment. MOUNTING THE UNIT The Heatrix HXOB style electric duct heater is designed for close-coupled application to the unit for either vertical or horizontal airflow. The control box should be positioned for easy access when servicing. On units where the air handler is located in a closet, heater control box should be accessible from front of the unit. Check heater element section for baffled side of discharge. The baffled side must corresponding to the blanked-off section of unit fan discharge. Incorrect alignment of baffled section of the heater and the fan discharge blanked-off section will cause incorrect operation of unit and heater (see Figure #1 for heater installation). After determining alignment of heater to unit, fasten heater to air handler with at least six (6) #8 sheet metal screws, being careful not to drill any important components in the unit. The heater cover should open freely for maintenance or service. If electric heater is equipped with circuit fusing, a hinged door for easy access is provided. There is a locking latch that holds the door onto the control box and/or locking disconnect switch handle. For locking latch, use a screwdriver to open door. For disconnect handle, simply turn to OFF position. For ease of installation, the door should be locked closed when installing unit package. Connect duct work down over 1 of heater lip or down over heater plenum. Don t insulate heater control box. TOLL FREE

45 WIRING PROCEDURES A. LINE VOLTAGE WIRING: Adhere to all local building codes, ordinances and/or the National Electric Code pertaining to installation of equipment. Disconnect all power to the unit before servicing. The electric heater has a 7/8 diameter pilot hole for enlarging to proper size opening for line voltage entrance. Run power lines from disconnect through entrance hole to labeled disconnect or line voltage block. Copper wire must be used from the disconnect switch to the unit. Always use a good grade of wire, such as 75-degrees C material for electric heater. See attached diagrams. B. GROUND: The heater cabinet must have an uninterrupted or unbroken electrical ground to minimize the chance of injury should an electrical fault occur. This may consist of an electrical wire or approved conduit when installed in accordance with existing electrical codes. C. DISCONNECT SWITCH: A separate branch electrical circuit containing a field supplied disconnect switch mounted at or within sight of the unit must be run from the heater section. (for single line feed of heater, the power wire size for both heater and fan motor must be supplied). See Diagram #3 If the disconnect switch is to be mounted on the unit, select a location where the drill or fasteners will not contact electrical or refrigerant components. If the unit was installed before the addition of the electric heat package, it will probably be necessary to bring in a new line voltage power supply because the original power supply may not be sufficient to handle the load. D. CONTROL VOLTAGE WIRING: In some cases the electric heat package is equipped with a low voltage control transformer. Standard control voltage is 24V (120V-277V is available upon special request). If unit is equipped with a transformer, isolation must be maintained from the external Class II output of ay transformer in the unit equipment. Use a thermostat with isolating contact to prevent interconnecting of Class II output. The heater is equipped with a low voltage control terminal strip. A 7/8 or 1/2 round hole with a bushing is used for the entrance of the control wire. The terminal strip is marked with the proper control connection for the thermostat. E. THERMOSTAT SETTING: The indoor thermostat heat anticipator setting should agree with the current draw of the heating controls of the control circuit. Some power can be saved by lowering the thermostat setting at night, but it is not recommended to lower it more than 5 or 10 degrees because4 the recovery time is the morning may offset any savings accomplished during the setback period F. FAN INTERLOCK: Per U.L. and N.E.C., the heater has a fan interlock circuit built into it. The interlocking relay circuit insures that the fan is operating whenever the heater is energized. G. OPTIONAL AIR PRESSURE SWITCH: Circuit only allows the heater to operate under an air moving condition. TOLL FREE

46 OPERATION - GENERAL In the HXOB style electric duct heaters, the heating elements and primary fan interlock are switched ON and OFF through the one or more controls that operate through a low voltage thermostat circuit. These controls consist of a number of switches and a low voltage (24V) resistance bimetal heater (sequencer) or contactor. In the case of the sequencer, when the thermostat contactor closes, the control heater is energized and the heat in the bimetal cause it to move, closing the switches in a times sequence. The is a initial time delay while the bimetal is heating. With a contactor, the switch closes immediately. The timed sequence will operate at second intervals. On the initial startup of the heater, there will be a 45 second delay of operation. The fan will energize with the first heating element. Fan interlock wire must be used to insure proper operation of the heater. Failure to do so may result in over temperature of the heater element area. AIR VELOCITY Since electric heaters have constant BTU outputs as long as the heater is energized, minimum airflow through the heater must be maintained in order to: 1) Achieve good heat transfer 2) Prevent overheating and nuisance tripping of the protection devices 3) Maintain life expectancy Air velocity is important for the electric heater to operate efficiently. Loss or impedance of air flow may result in nuisance tripping or short element life. Too high of air flow will result in low air temperature rise. We recommend at least 50 CFM per KW for proper operation of the heater. HEATER LIMIT SWITCHES AND RELAY COMPONENTS Temperature limit switches are special combination recycling and single operation limit controls. When an over temperature condition exists, the primary SPST device will open the circuit to the heater elements. This will occur without opening the fan circuit, thus facilitating quick cooling of the automatic reset limit. When sufficiently cooled, the heater elements will be re-energized. The heater is also equipped with secondary limits that must be manually reset in the event of an over temperature condition. SERVICE Only licensed, qualified installer and service mechanics should install, start up or service this equipment. When working on this heater, observe precautions in the literature, tags or labels that are attached to the heater. Service access to the various components of the HXOB style electric duct heater assembly may be obtained as follows: 1) Disconnect all electrical power to the unit before performing any maintenance or service to the unit. Unit may have more than one disconnect switch. 2) Open hinged cover with screwdriver. 3) All components are available in the control box. 4) Components may be checked and serviced in the control box. Replace defective parts with identical parts only. Check wiring diagrams for proper wiring before turning power back on. 5) Don t jump out secondary of transformer. This may result in short occurring in the secondary of the transformer. 6) Heater may employ time sequence. Please give unit the proper amount of time for heater to energize and de-energize. 7) INSTALLER MUST TIGHTEN ALL ELECTRICAL CONNECTIONS TOLL FREE

47 DUCT WORK MIN.DIMENSION 12 HINGE ELECTRIC HEATER AUXILLARY CONTROL CENTER FLANGE COVER BAFFLE CONTROL BOX ELECTRICAL KNOCKOUT NOTE: BLANK-OFF SECTION BAFFLE OF HEATER & UNIT MUST CORRESPOND TO EACH OTHER FAN SECTION AIR DISCHARGE SUPPLY CONTROL BOX LOCATION AIR HANDLER VERTICAL POSITION BLANK-OFF SECTION INLET GRILL FIGURE #1 TOLL FREE

48 VERTICAL VERICAL DISCHARGE BAFFLE HEATER BLANK-OFF SECTION AIR HANDLER OR EQUIPMENT AIRFLOW HXOB SERIES HEATERS HORIZONTAL DISCHARGE 1 FLANGE DUCT CONNECTION NOTE: BLANK OFF SECTION AND BAFFLE OF HEATER MUST CORRESPOND TO EACH OTHER HEATER CONTROL BOX BLANK-OFF SECTION BAFFLE HEATER CONTROL BOX AIRFLOW AIR HANDLER OR EQUIPMENT HEATER 1 LFANGE FOR DUCT CONNECTION FIGURE #1 NOTE: BAFFLE PLATE LOCATED ON EACH HEATER DISCHARGE MUST MATCH UP TO UNIT FAN BLOWER BAFFLE HEATING ELEMENT MUST BE IN AIR STREAM. TOLL FREE

49 1. All fuse replacement shall be Class K 2. All field wiring entering this enclosure shall be NEC Class 1 75º C 3. Fan relay (if used) contact rating 144VA 24V. 720 VA V. LEGEND APS Air Proving Switch AR Auto Reset FR Fan Relay GR Ground Lug FRC Fan Relay Coil HC Heater Control HCC Heater Control Coil LF Line Fuse Amps PE Pneumatic Elect. Switch TD Time Delay TC Time Control TL Thermal Limiters FR Transformer TRF Transformer Fuse HE Heat Element F Fan Interlock DS Disconnect Switch CB Circuit Breaker * FUSED DISCONNECT SWITCH L1 L2 L3 SUPPLY VOLTAGE GR * MUST BE SIZED FOR BOTH HEATER & FAN DIAGRAM #3 TO HEATER TO FAN SECTION TOLL FREE

50 1. All fuse replacement shall be Class K 2. All field wiring entering this enclosure shall be NEC Class 1 75º C 3. Fan relay (if used) contact rating 144VA 24V. 720 VA V. LEGEND APS Air Proving Switch AR Auto Reset FR Fan Relay GR Ground Lug FRC Fan Relay Coil HC Heater Control HCC Heater Control Coil LF Line Fuse Amps PE Pneumatic Elect. Switch TD Time Delay TC Time Control TL Thermal Limiters FR Transformer TRF Transformer Fuse HE Heat Element F Fan Interlock DS Disconnect Switch CB Circuit Breaker TOLL FREE

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55 STAINLESS STEEL FINNED TUBULAR ELEMENTS The stainless steel finned tubular elements supplied by Dell Corporation are similar to the standard finned tubular element construction except that a high temp corrosion resistant #304 grade stainless steel is utilized, versus carbon steel. The heating element construction incorporates a premium grade, helical wound, 80/20 nickel chromium resistance wire imbedded in compacted, high purity, magnesium oxide. The heater sheath consists of a rugged 7/16" diameter #304 stainless steel tube. The heater tube, in combination with internal element construction, provides an optimum of internal electrical spacings and thermal profile features. The outer fin consists of 3/8" wide x 1/32" thick, continuous edge wound #304 stainless steel strip, configured at 4-5 fins per linear inch to ensure maximum heat transfer, heat dissipation and uniform heating. Stainless steel finned tubular elements are rated for high temperatures up to 1200ºF. These elements are to be used where superior corrosion resistance is required eg. high humidity or moist environments. Terminals are stainless steel. Lead time on heaters with stainless steel finned tubular elements is 4-5 weeks after receipt of order, same as carbon steel. TOLL FREE

56 INSTALLATION INSTRUCTIONS FOR MODULAR ELECTRIC HEATERS WITH PLENUM ASSEMBLY WARNING Danger of bodily injury or death! Disconnect Electric Power Before Installation. Where there is more than one circuit, be sure All circuits are turned off! HEATER INSTALLATION 1. First determine position of electric coil preheat or reheat position 2. Determine location of heating elements in relation to modular unit. There must be at least 24 from the center line of element section to the center line of the filter section. 3. Blower motors must have insulation class listing in excess or 175 degrees Fahrenheit. After determining the above, you re ready to begin installation. INSTALLATION OF MODULAR HEATER WITH MODULAR PLENUM 1. Remove electric heater section from plenum. This will make installation easier. Plenum section is shipped without gasket material on leaving-air and entering-air sides. You will find this material inside heater terminal enclosure. 2. Make sure all bare metal on flanges has gaskets to prevent air leaks. Plenum assembly should match up to existing equipment modules. It is the installing contractor s responsibility to supply any hardware necessary to connect sections (i.e. bolts, nut, sheet metal screws or corner brackets). 3. Once modules are connected, the heater section may be reinstalled into plenum assembly by positioning element area on supplied tracks and sliding into plenum assembly; reattach with screws removed previously. 4. To do this, you must remove sheet metal screws from terminal enclosure that attache control box to plenum assembly. INSTALLER MUST TIGHTEN ALL ELECTRICAL CONNECTIONS IN CONTROL PANEL TOLL FREE

57 INSTALLATION OF MODULAR HEATERS BY HEATRIX INTO OEM FACTORY BLANK ACCESS SECTIONS DRAW THRU OR BLOW THRU APPLICATIONS INVOLVING CENTRAL STATION AHU S IN ACCORDANCE WITH SMACNA DUCTED ELECTRIC HEAT GUIDE FOR AIR HANDLING SYSTEMS, SECOND EDITION, SECTION 4.7 SPECIAL LOCATIONS, AS WELL AS NFPA 70, NATIONAL ELECTRIC CODE - SECTION B. WARNING Danger of bodily injury or death! Disconnect Electric Power Before Installation. Where there is more than one circuit, be sure All circuits are turned off! The factory blank access section will be ordered with a flat panel on the side that the heater is to be installed through, with an access door on the opposite side for service, if desired. Tracks and fixtures to support the heater within the access section, are to be supplied by the installer. The alignment of the heating coils are to be that the full face be in the airstream. There must be at least 24 from the center line of element section to the center line of the filter section. The installer will cut a slot into the flat panel side to assure proper alignment as the heater is installed into the blank access section. Gasket and sealant material supplied by the installer is to be used to seal the cut edge of the slot and the mounting surface of the control panel of the heater. Heatrix Heaters have a required minimum feet per minute on the data label. This requirement must be met so that the heater will operate properly. All heaters have a wiring diagram. All power & control wire specifications are per N.E.C. All heaters are to be interlocked with the blower via air switch or relay. INSTALLER MUST TIGHTEN ALL ELECTRICAL CONNECTIONS IN CONTROL PANEL TOLL FREE

58 INSTALLATION INSTRUCTION FOR INSTALLING MODULAR ELECTRIC HEATERS TOTALLY INSIDE FACTORY OEM ELECTRIC OR BLANK ACCESS SECTIONS IN ACCORDANCE WITH NFPA 70, NATIONAL ELECTRIC CODE SECTION B. This type of modular electric heater has been designed to fit entirely into the factory OEM electric or Blank Access Section. This type modular electric heater is to be a minimum of 24 from a filter section. The installation of the heater should be done by a qualified sheet metal contractor, who would supply the sheet metal tracks and support fastening fixtures. To insure proper airflow through the heater, the heater should be in alignment with all other components in the air handling system where airflow is also a consideration. ALL HEATERS ARE LABELED ON THE HINGED COVER WITH THE MIN. FPM An air balance contractor should verify the proper FPM on start up. Full face of the heating coil should be entirely covered. Most heaters are set up for negative pressure. The pitot tube in the airstream is tubed to the low pressure port of the air switch. This pitot tube is factory positioned so that the airflow will hit the back of the neck of the pitot tube in the airstream. A secondary pitot tube assembly is supplied with the heater, to be field connected to the high pressure port on the air switch and the attached pitot tube to be field installed in a manner so as to sense atmospheric pressure outside the heater section. This will enable the air switch to sense differential pressure so as the switch will make and interlock the heater with the fan. Field wire the supply & control circuits in accordance with NEC and local codes. Each electric heater has a wiring diagram affixed the inside of the hinged cover. The electrical data is to be found on the outside of the hinged cover of the heater. Blower motors should have an insulation class listing in excess of 175 degrees F. INSTALLER MUST TIGHTEN ALL ELECTRICAL CONNECTIONS IN CONTROL PANEL TOLL FREE

59 INSTALLATION INSTRUCTIONS BOTTOM/TOP MOUNT INSTALLATION M1, MF, MH1, MHF1, OMH1, DAS, DFS ELECTRIC DUCT HEATERS THE ABOVE DUCT HEATERS MAY BE USED WITH HEAT PUMPS, COOLING UNITS OR WITH ANY FORCED AIR SYSTEM. THEY HAVE BEEN TESTED IN ACCORDANCE WITH U.L AND THE NATIONAL ELECTRIC CODE FOR ZERO CLEARANCE INSTALLATIONS INSTALLATIONS For best performance, all models except the DAS Series (2 Ft) should be mounted a minimum of 4 feet downstream or upstream from the air moving device. Follow all SMACNA guidelines for installations. All eaters carry an air flow direction label that must be followed. Heaters are labeled in accordance with mounting configuration. If mercury contactors are present, heater will carry a label mount with this side up. FOR M1, MF, OH1, OMH1, DAS, ODS, DASR, ODASR, DFR SERIES These models are slip in type heaters which requires cutting a slot to allow for the heating element section to slide into the duct work. Make sure to use an approved duct sealant to create an air tight seal between the control box an duct work. On OM Series you must use an approved outdoor sealant to prevent water seepage between the control box and the duct work. MR1, MHF1, DAF, DAFR, DFF SERIES These models are flange mount heaters. The heaters carry a turned out flange which actually becomes part of the duct work. Flanges do not need to be exactly the same size as the existing duct flanges. Measure the airway length of the heater to determine the portion of the duct to be replaced. The heater will be attached to 3 sides of the duct by the flanges. The portion of the duct where the control box is located should be attached directly to the control panel. A flange is not required here. REMOTE PANEL MODEL Remotes are used when access or size constraint is a problem. Remote panels house all of the operations components of the electric heater. The terminal enclosure houses all of the element terminals, air pressure switch and all primary and secondary overloads. Remote panels should not be attached to duct work. When a NEMA remote panel is used it must be installed indoors, only a NEMA 4 rated remote panel can be installed outdoors. INSULATED DUCT Heater must be designed specifically for internally insulated duct work. ACCESS FOR MANUAL SWITCHES It is recommended that the installer cut an access opening in the duct work that coincides with the access plate on the bottom mount heater. This will ensure accessibility to the limits for resetting without removing the heater from the duct work. KNOCK OUTS It is the responsibility of the electrician to install the knock out for field supplied conductors. Knock out size must be determined by the table 14.1/14.2 on the National Electric Code. Knock out placement is marked by the manufacturer. Field wire the supply and control circuits in accordance with local and national codes. All heaters carry a wire diagram attached to the inside cover. INSTALLER RESPONSIBILITY It is the responsibility of the installer to make sure all electrical connections in the control panel are tight. Do not insulate or enclose the control panel. All heaters are intended for use in duct work only. Duct work should be constructed in accordance with the National Fire Protection Association. NFPA #90A/NFPA #90B and the SMACNA ducted electric heat guide. TOLL FREE

60 INSTALLATION INSTRUCTIONS FOR NEMA 4/12/13 TYPE ENCLOSURES These duct heaters are suitable for outdoor installations in vertical or horizontal duct systems. They may be used with heat pumps, cooling units or any forced air system and are suitable for zero clearance installations. MODEL NUMBERS OMH1 - Outdoor manual heater, slip-in, requiring MR Series Remote Panel. OMHF1 - Outdoor manual heater, flange mount, requiring MR Series Remote Panel. OM1 - Outdoor slip-in type, no remote panel required. OMF1 - Outdoor flange mount type, no remote panel required. INSTALLATION INSTRUCTIONS For best performance, the duct heater should be installed 4 downstream or upstream of the airmoving equipment. Install the slip-in type heater by cutting correct size opening in duct work. Insert heater and fasten accordingly. On an extremely long heater, a support foot may be needed at opposite end of control panel to support weight of heating elements. For installation of flange-mount heaters, the heater will have a turned-out flange which should match up to flanges of existing duct work. In this application, the heater actually becomes part of the duct work. Although the control panel is for outdoor use, this will not prevent water seepage at installation point in the duct system. IT IS THE INSTALLER S RESPONSIBILITY TO INSURE A WATERPROOF SEAL OF ALL SEAMS IN FLANGE-MOUNT SYSTEMS AND BETWEEN PANEL AND DUCT IN SLIP-IN MODELS. TO ACCOMPLISH THIS, INSTALLER MUST USE AN APPROVED OUTDOOR SEALANT. Air flow and patterns of air flow are very important for the heater to work correctly. This is to insure the life of the heating elements, and to prevent nuisance tripping. Heatrix Heaters carry a label showing minimum air flow that can be used to operate heaters correctly by showing entering air at two different temperatures. These minimum air velocities or C.F.M. must be in a pattern that covers the entire surface of the heater. Field wire the supply and control circuit in accordance with national and local electrical codes for outdoor power supplies. Each heater carries a wiring diagram designed for that particular heater, showing the manner in which each duct heater must be connected externally to be properly interlocked with the blower motor, if the blower motor control is not actually a part of the duct heater assembly, unless the duct heater is provided with an integral air pressure switch. INSTALLER MUST TIGHTEN ALL ELECTRICAL CONNECTION IN CONTROL PANEL. The air duct should be installed in accordance with standards of the National Fire Protection Association for the installation of air conditioning and ventilating systems of other than residence type; NFPA #90A, and residence-type warm air heating and air condition systems, NFPA #90B. TOLL FREE

61 LEGEND APS Air Proving Switch AR Auto Reset FR Fan Relay FRC Fan Relay Coil HC Heat Contactor HCC Heat Contactor Coil LF Line Fuse TRF Transformer Fuse TL Thermal Unit TD Time Delay TC Time Delay Coil HE Heat Element DS Disconnect Switch CB Circuit Breaker GR Ground PE Pneumatic Switch TG Toggle Switch PL Pilot Light SS Silicone Switch HTR. FUSE REPLACEMENT SHALL BE CLASS K ALL FIELD WIRING ENTERING ENCLOSURE SHALL BE NEC CLASS 1 75 C VOLT AMP KW PHASE DWG Note: *Optional Features Only TOLL FREE

62 LEGEND APS Air Proving Switch AR Auto Reset FR Fan Relay FRC Fan Relay Coil HC Heat Contactor HCC Heat Contactor Coil LF Line Fuse TRF Transformer Fuse TL Thermal Unit TD Time Delay TC Time Delay Coil HE Heat Element DS Disconnect Switch CB Circuit Breaker GR Ground PE Pneumatic Switch TG Toggle Switch PL Pilot Light SS Silicone Switch HTR. FUSE REPLACEMENT SHALL BE CLASS K ALL FIELD WIRING ENTERING ENCLOSURE SHALL BE NEC CLASS 1 75 C VOLT AMP KW PHASE DWG Note: *Optional Features Only TOLL FREE

63 LEGEND APS Air Proving Switch AR Auto Reset FR Fan Relay FRC Fan Relay Coil HC Heat Contactor HCC Heat Contactor Coil LF Line Fuse TRF Transformer Fuse TL Thermal Unit TD Time Delay TC Time Delay Coil HE Heat Element DS Disconnect Switch CB Circuit Breaker GR Ground PE Pneumatic Switch TG Toggle Switch PL Pilot Light SS Silicone Switch HTR. FUSE REPLACEMENT SHALL BE CLASS K ALL FIELD WIRING ENTERING ENCLOSURE SHALL BE NEC CLASS 1 75 C VOLT AMP KW PHASE DWG TOLL FREE

64 LEGEND APS Air Proving Switch AR Auto Reset FR Fan Relay FRC Fan Relay Coil HC Heat Contactor HCC Heat Contactor Coil LF Line Fuse TRF Transformer Fuse TL Thermal Unit TD Time Delay TC Time Delay Coil HE Heat Element DS Disconnect Switch CB Circuit Breaker GR Ground PE Pneumatic Switch TG Toggle Switch PL Pilot Light SS Silicone Switch HTR. FUSE REPLACEMENT SHALL BE CLASS K ALL FIELD WIRING ENTERING ENCLOSURE SHALL BE NEC CLASS 1 75 C VOLT AMP KW PHASE DWG TOLL FREE

65 LIMITED WARRANTY DELL CORPORATION WARRANTS EACH NEW HEATRIX HEATER AND EACH REMOTE PANEL AGAINST DEFECTS IN MATERIAL AND WORKMANSHIP FOR A PERIOD OF (1) ONE YEAR FROM DATE OF SHIPMENT FROM OUR FACTORY. Should any evidence of defects in material or workmanship occur during the warranty period, Dell Corporation will repair or replace without charge at Dell Corporation discretion. NO GOODS SHALL BE RETUNED WITHOUT FACTORY AUTHORIZATION. Dell Corporation will not be held responsible for any field charges involved in the removal or replacement of alleged defective equipment not for incidental damages. Any evidence of removal or changing the original equipment or wiring in heater or panel VOIDS all Warranty, and Dell Corporation will not be held responsible. TOLL FREE

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67 HEATRIX 245 SOUTH WEST 33rd STREET FORT LAUDERDALE, FLORIDA (954) FAX (954) ALL U.S.A. TOLL FREE DELLHEATRIX.COM