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Heater Battery

  • Heater Battery

Heater Battery

Application

Air-conditioner {AHU-FCU}, High Temperature Natteries, Load Bank of Generators, Industrial Drying Ovens , Heat Treatment, Offices, Buildings, Institutes, Retails , and Much More.

Available Types

  • unitary Commercial Industrial Heaters
  • Custom-Built (CB) Duct Heaters
  • Stock- Line(SL) Duct Heaters
  • Remote Panel (RP) v
  • Flange Mount (FM) Duct Heaters
  • Slip-Mount (SM) Duct Heaters
  • Bottom Mount (BM) Duct Heaters
  • Double Deckker Mount (DDM) Duct Heaters

    • Characteristics

  • Capacity 3kw to 1000kw
  • Operating Voltage 110,220,230,415, 600 (1-3PH) AC/50-60 Hz

    • Features

  • Constructed as standard units
  • Tailored to suit Customer's Specific requirement
  • Designed for operation in temperature conditions upto 9500F
  • Suitable for use in relative humidity upto 90%

    • Construction:

    Incoloy 800, Stainless Steel -321 Sheathing of tubular elements with/without finns. U/M shape elements are mounted on a detachable terminal plate using galvanized retainers. A mounting flange permits attachment to the duct work. Individual elements are easily replaced or interchanged. Where the application calls for a higher temperature, the case is constructed from heat resisting steels. A thermal Cut-out fitted for protection against overheating. Safety Auto Thermostat Cut-off required temp. Control, contractor and fan interlock device, SSR, SCR, BMS Compatible are available as optional extras, M / Explosion resistant covers (Flame Proof) and element are also available. Zero Clearance Construction / selected elements by calculated wire temperature method.

    OPEN COIL CONSTRUCTION: Heating Elemetn Shall be Open coil 80% nickel 20% chrome type resistance wire shall be machine crimped into stainless steel. Terminals are supported by ceramic bushings staked into supporting brackets.

    DUCT HEATERS FOR EXPLOSION / HAZARDOUS AREAS: - Daspass offer a wide selection of custom built electric duct heaters designs for outdoor, wet, dusty typical applications include use with roof top air-handling unit, in wash down areas such as food processing plants, wet & humid spaces neat indoor swimming pools, Sub-marine or Casino boat applications including shipboard use.

    Calculating KW Requirement

    Once the volume of airflow (CFM - in cubic feet per minute and the required temperature rise (Delta T degrees F ) through the heater are known , the required Kw rating ?(Kw) of the heaters can be determined from the formula :-)

    KW (Capacity)= CFM x △ T0F / 3193

    KW (Capacity)= Litter x △ T0C / 837

    where the desired heating capacity in BTU / Hr is known the Kw is determined from the formula:-

    KW (Capacity)= BTU / Hr / 3412

    SINGLE PHASE ( 1 PHASE)

    AMPERES = Watts / Line Voltage

    THREE PHASE ( 3 PHASE)

    AMPERES = Watts / Line Voltage x 1.73

    The following load calculationand recommended operating ranges are based on standard 750 F entering air {comforting heating} Consult factory for the applications.

    Converion 1 Kw = 3413 BTU
    Load Requirement Kw = {cubic feet per min x Temperature to rise}/3193
    Ohm's Law Watts = (Volts ) / Resisatance = volts x Amps
    Line Current, 1 Phase Amps = Watts / Voltage
    Line Current, 3 Phase Amps = Watts / (volts x 1.73)
    Pressure Drop Inches = H2 [{Kw / Ft2}/760x[velocity in F.P.M / 500/2]}]
    C.F.M / F.P.M Velocity VEl. / FPM CFM / (Duct Area / Ft.2)
    Relationship Kw per Sq. Ft. Kw/Sq. Ft. Kw /[(Duct with {inches} x Duct Height {inches} / 144]

    Heating Element Wiring Configurations

    Installation Cautions :

    Installation , Operating and Maintenance Manual Electrical Duct Heaters

    FLANGE-IN-TYPE (FM) DUCT HEATERS

    SLIP-IN-TYPE (SM) DUCT HEATERS

    ROUND MOUNT (RM) TYPE DUCT HEATER

    Rounf Mount Duct Heater are available for installation on round duct system with a 30 mm Extension on each side of the frame bny male and female adaptor

    Read And Save These Installation Instruction

    Technical Data Description
    Minimum distance from obstacle or obstruction in duct 48" (1.2m) upstream and downstream of electric heater
    Airflow direction Horizontal or vertical (refer to Approved GA Drawing)
    Voltage See the Name Plate
    Capacity See the Name Plate
    Power See the Name Plate
    Control Voltage As per approved GA Drawing
    Minimum Air Velocity Ensure minimum Air Flow

    Caution , Risk of malfunction: In case alteration ( drilling holes or other ) to the electrical compartment , ensure proper protection of all electrical components installed . Chips may cause short circuit or effect operatin of electrical components .

    General This document is to be used for all Duct ? AHU /FCU heaters installation unless the heater is used in apiece of equipment supersedes this documnent . In the case, it is the responsibility of the end user equipment manufacturer to have performed testing for the end use application

    Application Information

    Follow the procedure given on the sheet to find the minimum air velocity for safe operation. At least this minimum velocity must be provided at all points over the heater face area. Failure to meet this requirement may result in serious damage or nuisance thermal cutout tripping.

    In the duct which may result in no uniform airflow. Duct elbows/ turns / fan of filters must be located at least 4 feet from the inlet of the heater and 2 free from the outlet of the heaters.

    Mechanical Installation

  • All heaters are suitable for installation with zero spacing between the duct and combustible surfaces.
  • The heater must be installed in the correct position as shown by the arrows marked on the terminal box.
  • Sufficient clearance for convention cooling must be allowed for all heaters with built-in SCR power controllers. Provide at least 5 inches of free air space above and below cooling fins extending from heater terminal box.

    • Flange Type Heaters

  • 1. Provide flanges on the duct to match the heater flanges, both the entering and leaving air sides.
  • 2. Attach the duct flanges to the heater flanges with bolts, sheet metal screws of slip and drive connectors when the heater has matching connectors for the purpose.

    • Slip-In Type Heaters

  • 1 - Cut a hole in the side of the duct to accommodate the body of the heater (excluding terminal box). This hole should be 1/8" larger than the heater frame.
  • 2 - Slip the heater into the duct and attach the back of the terminal box to the duct with sheet metal screws.

    • Electrical Installation

  • 1. Follow the wiring diagram pasted inside of the terminal box.
  • 2. Supply connections must be made with copper wiring rates for 75 degree C minimum.
  • 3. If supply connections are for 230 volts or greater, all wiring must be insulated for 600 volts.
  • 4. When making line connections to heater element terminal, must be tight properly otherwise damage to terminal may result.
  • 5. Supply conductors for heaters rated Kw, must be sized at 125% of rates load. The line current of either a single or three phase load is calculated as follows:

    Single Phase Line Current = Kw x 1000/ Voltage

    Three Phase Line Current = Kw x 1000 / Voltage x 1.73

  • 6. The heater must be wired so that it cannot operate unless air is flowing over it. This can be accomplished by using a built-in Air Pressure Differential Switch. See the wring diagram for the method used with this heater and provide appropriate interlock wiring as illustrated.
  • 7. All electrical connections in the heater, including both field and factory made connections, should be checked for tightness before operating the heater. In addition after a short period of operation, all connections should again be checked for tightness.
  • 8. If heater is wired to a heating/cooling thermostat, use a thermostat with isolating circuits to prevent possible interconnection.