MATRUSREE has the complete line of configurable Electric Duct Heaters that are perfectly suited to your HVAC applications, provided with Long Life Heating Elements specially designed for HVAC Environment using highest Quality Raw materials and processed under stringent Quality Control. Our duct heaters are composed of tubular or finned tubular heating elements that are either flanged or Slip inserted in the duct for air flowing ventilation systems and comfort heating applications. Matrusree can configure electric duct heaters exactly according to client specifications in a way they get easily adaptable solutions.
MCBsCircuit Breaker are Used to protect the total load or individual stage Loads. Dependingupon the Number of Banks, Single Pole MCBs areused for protecting control circuit components.
POWER FUSINGHeater Banks in excess 48 Ampsshould be Fused as standard, Fuse blocks areprovided in Individual Banks or in the Supply Line
FEATURES
MCBsCircuit Breaker are Used to protect the total load or individual stage Loads. Dependingupon the Number of Banks, Single Pole MCBs areused for protecting control circuit components.
POWER FUSINGHeater Banks in excess 48 Ampsshould be Fused as standard, Fuse blocks areprovided in Individual Banks or in the Supply Line
FEATURES
MCBsCircuit Breaker are Used to protect the total load or individual stage Loads. Dependingupon the Number of Banks, Single Pole MCBs areused for protecting control circuit components.
POWER FUSINGHeater Banks in excess 48 Ampsshould be Fused as standard, Fuse blocks areprovided in Individual Banks or in the Supply Line
FEATURES
Rating: upto 300Amps
TRANSFORMER OR POWERSupply for ControlCircuit Control transformers are used to providesingle point wiring when the control voltagediffers from the line voltage. The transformer isavailable as fused or unfused. Power SupplyModules also available for low voltages.
POWER SUPPLYBuilt-in control transformersupplies 24 volts to the control circuit forcomponents like T+RH, Sensor and PIDController and for related Control circuit.
FEATURES
Secondary Voltage 24V/120V & 230 V/415V (Marine Applications)
AUTOMATIC RESET CUT - OUTThe automaticreset thermal cut-out is a fail-safe device withVariable Temperature Range for Over HeatingConditions, it comes in Stem type and Capillarymodels, this safety device opens the circuit andDe-energizes the Heating Elements when it's setpoint is reached. It automatically resets andreturns the heater to operating conditions whenthe desired temperature returns in the duct.
DOOR SWITCHA Door Switch is a Safety Limit Switch that
automatically Disconnects Power supply to the Heater Control circuit when the
Panel Door is opened for Service.
DP SWITCHUsed to prevent a heater from operating if there is no airflow. Provided with apitot tube which, when installed into the duct,makes it sensitive to velocity pressure as well asto static pressure by comparing the differencebetween the Pressures within the Duct andoutside, it has a selectable range in Pascalranging from 20-300 Pascal.
FEATURES
Connections:
2 nozzles 6mm
TUBULAR HEATING ELEMENTS-FINNED & NON FINNEDTubular type elements used in the DuctHeaters are normally Finned. Galvanized Steel or SS Finns are tightly wounded on heavy duty Tubular Heatingelements, The Tube sheath is normally SS 321 & 304 Grade with Tube Diameter of 8mm & 11mm as standardconstruction, Premium Grade Raw Materials like 97% Purity Mgo, Highest Grade-A Resistive Alloy elements areused and Elements are Processed and compact Roll reduced to final diameters before finning is done & bent to U(or) M shape. The elements are finally crimped with Bolt Mountings and assembled on the Heater Frame plate.For further information on tubular please refer to our tubular heater section of our catalogue.
HEATER DUCT FRAME is made of corrosion-resistant Galvanized steel of suitable gauge as required and the Side flanges are typically 30mm to 40mm, Dimensions are as per GA drawings, the portions on the flanges whichwhile installation are not reachable for Bolting like the flange area under the terminal box extension are self threadedwith 10mm tapping to avoid air leakages at the time of installation from all 4 sides while fastening.Double Wall Thermally Insulated Duct Frames are also available as per client requirement.
TERMINAL ENCLOSURE & COMPONENT PANEL Fabricated using corrosion-resistant steel of suitable Gauge andAesthetically Powder Coated. Ingress Protection Standard as per requirement are also available, the Terminal Boxencases, the Heater Terminals, Wiring, Terminal Blocks, Safety devices like Thermal Resets, DP switch and otherControl Switches. terminal box is many a times thermally Insulated from the heater section.
FEATURES
MCBsCircuit Breaker are Used to protect the total load or individual stage Loads. Dependingupon the Number of Banks, Single Pole MCBs areused for protecting control circuit components.
POWER FUSINGHeater Banks in excess 48 Ampsshould be Fused as standard, Fuse blocks areprovided in Individual Banks or in the Supply Line
FEATURES
Rating: upto 300Amps
TRANSFORMER OR POWERSupply for ControlCircuit Control transformers are used to providesingle point wiring when the control voltagediffers from the line voltage. The transformer isavailable as fused or unfused. Power SupplyModules also available for low voltages.
POWER SUPPLYBuilt-in control transformersupplies 24 volts to the control circuit forcomponents like T+RH, Sensor and PIDController and for related Control circuit.
FEATURES
Secondary Voltage 24V/120V & 230 V/415V (Marine Applications)
AUTOMATIC RESET CUT - OUTThe automaticreset thermal cut-out is a fail-safe device withVariable Temperature Range for Over HeatingConditions, it comes in Stem type and Capillarymodels, this safety device opens the circuit andDe-energizes the Heating Elements when it's setpoint is reached. It automatically resets andreturns the heater to operating conditions whenthe desired temperature returns in the duct.
DOOR SWITCHA Door Switch is a Safety Limit Switch that
automatically Disconnects Power supply to the Heater Control circuit when the
Panel Door is opened for Service.
DP SWITCHUsed to prevent a heater from operating if there is no airflow. Provided with apitot tube which, when installed into the duct,makes it sensitive to velocity pressure as well asto static pressure by comparing the differencebetween the Pressures within the Duct andoutside, it has a selectable range in Pascalranging from 20-300 Pascal.
FEATURES
Connections:
2 nozzles 6mm
THYRISTOR POWER REGULATOR TPRis a SCRBased Phase Angle Power Controller thatmodulates the power supply to the heater to theexact amount of power to match the heatdemand. It can take input control signal fromdifferent sources like 4-20ma, 0-10VDC.
FEATURES
Control
Signal: 4-20ma, 0-10V
PID CONTROLLER, RH ON/OFF CONTROLLERare provided on the heater
or canbe provided as separate standalone control panels as per client
requirement tocontrol the RH % at desired levels. T+ RH SENSOR &
TRANSMITTER - DUCTMOUNTABLE are normally installed in Return air duct as
required to takefeedback control to above PID or ON/Off Controllers to control
RH at desiredLevels.
INDICATING LAMPS:are provided on Face Plateof the Terminal Panel box, They Provide PhaseIndication, No's of Banks ON Status, TripIndicator incase of SCR and related Conditions.Indicating Lamps are installed on the side paneland used to indicate heater conditions asfollows:
Available
with 24V or 230Vcontrol voltages
TERMINAL BLOCKS:Suitably rated TBs are provided for input Power
supply to theHeater bank and for control Signals like DI, Do as required to
& from BMS or fromSensing Device and to provide status and feedback signals
of required HeaterBank on/off Positions.
AUTO/MANUAL SELECTOR SWITCHis provided to Toggle
between the controlsource, in case the Control Signals are provided from BMS as
well as local RHControls and to switch between these options in event of
maintenance.
