Selectra Series 14 - Electronic Gas Flame Modulation Systems for Direct Fired Applications

Selectra Series 14 - Electronic Gas Flame Modulation Systems for Direct Fired Applications

Selectra Series 14 electronic gas flame modulation systems are designed for direct fired make-up air heating equipment. OEM or retrofit appli­ca­tions include environ­mental climate control, as well as indus­trial or commercial heating processes. Available standard companion electronics include temper­ature selectors, ampli­fiers, and temper­ature sensors, in a variety of configurations.

Series 14 works with Maxitrol’s modulator or modulator-regulator valves M411, M511, M611, and MR212(D, E, G, or J). The Selectra system’s unique electronic modulator or modulator-regulator valves control gas flow with instan­ta­neous response and continual adjustment to maintain constant discharge air temper­ature. 

Basic Series 14 compo­nents include an amplifier, integral or remote temper­ature dial, discharge air temper­ature sensor, and a mixing tube. 

Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world
Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world
Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world
Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world

Amplifier 

Amplifier: outputs variable DC voltage to modulating gas valve based on temper­ature setting dial and discharge air temper­ature sensor inputs. 

Initial Settings 

  • Dial Switch: Integral or Remote 
  • Low fire start switch – OFF, 10 seconds 
  • Sensitivity Adjustment Dial 

Temperature Dial 

  • Integral or remote temper­ature dial: Sets the desired discharge air temperature

Discharge Air Temperature Sensor 

  • Discharge air temper­ature sensor senses discharge air temper­ature (NTC thermistor) 

Mixing Tube 

  • MT mixing tube temper­ature averages strat­ified airstream in the duct. 

Amplifier 

Amplifier: outputs variable DC voltage to modulating gas valve based on temper­ature setting dial and discharge air temper­ature sensor inputs. 

Initial Settings 

  • Dial Switch: Integral or Remote 
  • Low fire start switch – OFF, 10 seconds 
  • Sensitivity Adjustment Dial 
Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world

Temperature Dial 

  • Integral or remote temper­ature dial: Sets the desired discharge air temperature
Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world

Discharge Air Temperature Sensor 

  • Discharge air temper­ature sensor senses discharge air temper­ature (NTC thermistor) 
Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world

Mixing Tube 

  • MT mixing tube temper­ature averages strat­ified airstream in the duct. 
Maxitrol’s GV30/30A controls: Used by numerous well-known manufacturers around the world

Series 14 Optional Components 

Room override: automat­i­cally increases discharge air temper­ature when space temper­ature falls below T115 room thermostat setpoint. 

Inlet air sensor: designed ratios (e.g. 8:1) that increase the discharge air temper­ature setpoint (+1) for each inlet air temper­ature decrease (-8) from a 60°F base. 

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