Dragon’s Breath Heat Blaster

The Heat Blaster system (Dragon’s Breath™) is designed to be located above guests in a theater, or a ride path and release an intense blast of hot air.

Dragon's Breath Heat Blaster
Dragon's Breath Unit

The system uses compressed air and an industrial heat tube to produce the heat blast. The Heat Blaster stays hot with a constant low level of air flowing through it, until the Heat Blaster is activated and compressed air is blasted through the nozzle, thus blasting heat at the guests almost instantly. When the Heat Blaster is de-activated, the system almost instantly cuts off the heat the guests feel.  The Heat Blaster then goes into “ready” mode awaiting the next “go” signal.

 

Products-Dragons-Breath-06

Note: The specifications listed below are specific to our standard product. Pricing and specifications could vary depending upon customer’s needs.

Key Assumptions:

  • Scenic elements needed to disguise the Heat Blaster will be provided by others
  • The overhead mounting locations are adequate for the hanging load
  • There is adequate area around the Heat Blaster for proper air flow
  • The facility HVAC system will be able to handle the added heat load
  • Compressed air will be provided at the necessary flow rate and pressure

Basic Equipment provided by Technifex:

  • (1) High-heat tube with temperature control box and monitoring system
  • (1) Compressed air accumulator tank
  • (1) Solenoid valve to control high/low air flow
  • (1) Coppus air accelerator
  • (1) Hanging hardware
  • (1) Over temperature cut-off switch
  • (1) Fuse box

Goods and services furnished and installed by others:

  • Compressed air supply and filtration, to Technifex specifications.
  • Power stub-ups within 6 feet (2m) of Heat Blaster
  • Show Control system to provide trigger signals
  • Compressed air stub-up within 6 feet (2m) of Heat Blaster
  • All scenic elements required as per art direction
  • Hanging/Mounting points

Specifications: (approximate dimensions and weights)

  • Heater/Controller Power: 240V System – (1) Circuit (208-240VAC, 3ph, 50/60 Hz, 40A)
  • Heater/Controller Power: 480V System – (2) Circuits (480VAC, 3ph, 50/60Hz, 80A)
  • Control: (2) Contact Closures (Input= Enable, Output= Fault), (2) 24VDC for air blast and air knife valves
  • Compressed Air (Avg.): 80 PSI @ 120 CFM (6.7 Bar @ 4247 lpm.)
  • Compressed Air (Peak): 100 PSI @ 160 CFM (6.7 Bar @ 8495 lpm.)
  • Dimensions of Heat Blaster: 36″x12″x14″ (914mm x 305mm x 356mm)
  • Dimensions of Air Accumulator Tank: 18″x18″x32″ (457mm x 457mm x 812mm)
  • Weight of Heat Blaster: 85 lbs. (38.5kgs)
  • Weight of Air Accumulator Tank: 150 lbs. (68kgs)

Heat Control System:

The Heat Controller utilizes a self-contained microprocessor based Process Controller. The unit monitors temperature utilizing a Type K thermocouple sensor and controls temperature with a rapid response three mode (PID) control scheme, with anti-reset windup. Numerous status and alarm functions are incorporated to monitor various system parameters.

The unit is housed in a NEMA 12 enclosure and contains the temperature controller and the necessary terminal blocks, transformers, safety relay and solid state relay to make up a complete system.

An independent high limit circuit is also provided. The sensor is a second Type K thermocouple. This circuit shuts off the internal safety relay should an over-temperature condition occur. It is totally independent of the microprocessor.

The following are some of the features:

  • USES TYPE K THERMOCOUPLE FOR PROCESS CONTROL
  • USES SECOND TYPE K THERMOCOUPLE FOR HIGH LIMIT
  • AUTOMATIC THERMOCOUPLE COLD JUNCTION COMPENSATION
  • HI LIMIT CIRCUITRY INDEPENDENT OF MICROPROCESSOR
  • ADVANCED RAPID RESPONSE 3 MODE CONTROL
  • BUILT IN SAFETY RELAY
  • BUILT IN SOLID STATE RELAY
  • BUILT IN CLASS 2 TRANSFORMER
  • EXTERNAL HEAT SINK
  • ON/OFF SWITCH
  • HEATER SNAP SWITCH INPUT
  • FLOW SWITCH INPUT
  • ACCESS CODE PARAMETER PROTECTION
  • EEPROM PARAMETER MEMORY
  • AUDIO ALARM/ANNUNCIATOR
  • ALL PARAMETERS SET IN SOFTWARE
  • NEMA 12 ENCLOSURE
  • TWO FOUR DIGIT LED DISPLAY

Heat Control Block Diagram:

 

Process Control Alarms:

There are six basic alarms in the unit.  When activated, the Alarm LED is illuminated, there is an audible sound and the indicated alarm action takes place.

All alarms are latching and require a User action to clear.  There is a 3 second alarm delay.

SYSTEM – This alarm is a catch-all indicator for the miscellaneous diagnostics.  An example would be the malfunction of the EEPROM SAVE routine.  This would simply indicate to the user that something has gone wrong and he should either repeat the command or reset the unit.  The process display will alternately flash the temperature and ‘SYS’.

SENSOR – This alarm indicates that the Process or High Limit sensor is either open or not connected. Special circuitry has been incorporated to monitor the sensors for an open circuit. The processor continually monitors the inputs and if it detects an open sensor, it shuts off the heater output and turns off the safety relay. The process display will alternately flash the temperature and  ‘OP’ for open sensor.

SAFETY LOCKOUT – This alarm indicates that one of the Safety Interlocks is either tripped or not connected.  There are three safeties that can cause this alarm (Snap Switch, Flow or the internal High Limit).  The alarms directly control the Safety Relay and it will be shut off regardless of the state of the controller. The microprocessor shuts off the SSR and redundantly shuts off the safety relay.  The process display will alternately flash the temperature and  ‘SFtY’.

HIGH TEMP – This alarm indicates that the process temperature exceeds the high alarm setpoint. When activated, the process display alternately displays the process temperature and the code ‘HI’.  The SSR and the Safety Relay are shut off.  Setting the alarm setpoint to 0 eliminates this feature.

LOW TEMP – This alarm indicates that the process temperature has fallen below the Low alarm setpoint. If the process temperature drops below the setpoint once it has initially come out of the warmup mode, this alarm will be activated. In this case, the code ‘LO’ is alternately flashed with the process temperature. The alarm is locked out in both the Hold and Warmup Modes.  The Warmup Mode is provided to eliminate nuisance alarms.  The unit is in this mode from the time the heater is turned on until the process temperature first exceeds the Low Alarm setpoint.

HIGH LIMIT – This alarm indicates that the High Limit temperature exceeds the High Limit setting.  This is a hardware function that is independent of microprocessor control.  The process display will alternately flash the process temperature and the code ‘HL’.  The SSR and Safety Relay are shut off.

 

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