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Exhaust fans
Exhaust fans

Modulating Electric Heater

(RE)

The Modulating Electric Heater is used for tempering make-up air for installations requiring frequent air changes. These modular units are rated up to 257KW with voltages and phases to meet all electrical requirements.

Modulating electric heaters use Silicon Controlled Rectifier (SCR) technology, also known as current value, to modulate the capacity and the current supplied to the heater. The net heat output is the product of the KW capacity of the heater multiplied by the ratio of the "ON" to "ON+OFF" or "period" time. This ratio is determined by an electronic logic in the SCR according to a signal from a proportioning thermostat. Enough heat is stored in the electric elements so that there is an almost constant operating temperature corresponding to the demand.

This method, Modulating Control Mode, is also referred to as "proportional." The heater is electronically controlled to deliver anywhere from zero to 100% of its capacity, precisely and smoothly, matching the heat demand of the system. This is achieved by an SCR controller connected to a proportioning thermostat, which may be either a duct type for fresh air make-up or a room type for zone heating.

Proportional refers to the portion of a time period in which the heating element is turned ON and OFF (e.g. 10% ON and 90% OFF meaning 10% of the heating capacity). According to the thermostat demand, the heater is pulsed in different proportions of ON time and OFF time to match the heating demand. A proportional control can thus maintain an accurate room or discharge temperature without the typical variations of the ON/OFF method. This represents an energy savings of approximately 15% due to the high differential of ON/OFF controls.

These heaters are intended for indoor and outdoor installations in commercial kitchens, factories, foundries and similar commercial and industrial occupancies. Combination packages that include both the exhaust and the supply fans mounted on a single roof curb are also available. Contact your local sales representative for more information.

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  • Air Volume: 400 – 22,000 cfm
  • Maximum SP: 3" wg. @ standard air density
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Features

  1. UL & CSA listed - the electric insert is a listed sub-assembly
  2. SCR with modulating control
  3. 120 volt control transformer
  4. Galvanized, fully insulated casing
  5. Temperature control system
  6. Access doors on both sides of unit
  7. Lifting points
  8. Blower interlock
  9. Airflow proving switch
  10. Coil observation port
  11. High temperature limit
  12. Motor starter
  13. Vibration isolation
  14. High efficiency motors
  15. Adjustable drive sheaves
  16. Horizontal or down discharge
  17. Disconnect switch

Options

  1. Motorized intake damper
  2. Remote control panel
  3. Freeze stat with bypass timer
  4. Room temperature control
  5. Convenience outlet
  6. Mixing box with damper control
  7. DX cooling coils
  8. Evaporative cooler intake
  9. V-bank filter intake
  10. Sloped filter intake
  11. Auxiliary starters
  12. Indoor hanging cradle
  13. VAV packages
  14. Roof curbs
  15. Clogged filter switch
  16. Cooling thermostat and interlock
  17. Extra set of V-belts
  18. Modular packaged cooling

Resources

Models

  1. R1-E.101-G10 Electric Heated Make Up Air Unit with 10" Blower and 1 modulating stage, 10KW 208 -1 Coil
  2. R1-E.101-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and 1 modulating stage, 10KW 208 -1 Coil
  3. R1-E.201-G10 Electric Heated Make Up Air Unit with 10" Blower and a 3 stages total, 1 modulating, 20KW 208 -1 Coil
  4. R1-E.201-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 3 stages total, 1 modulating, 20KW 208 -1 Coil
  5. R1-E.202-G10 Electric Heated Make Up Air Unit with 10" Blower and 2 modulating stages, 20KW 208 - 3 Coil
  6. R1-E.202-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a modulating 20KW Coil
  7. R1-E.204-G10 Electric Heated Make Up Air Unit with 10" Blower and a 1 stage modulating, 20KW 460 - 3 Coil
  8. R1-E.204-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a modulating 20KW Coil
  9. R1-E.351-G10 Electric Heated Make Up Air Unit with 10" Blower and a 6 stages total, 2 modulating, 35KW 208 -1 Coil
  10. R1-E.351-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 6 stages total, 2 modulating, 35KW 208 -1 Coil
  11. R1-E.352-G10 Electric Heated Make Up Air Unit with 10" Blower and a 5 stages total, 1 modulating, 35KW 208 - 3 Coil
  12. R1-E.352-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 5 stages total, 1 modulating, 35KW 208 - 3 Coil
  13. R1-E.354-G10 Electric Heated Make Up Air Unit with 10" Blower and a 2 stage modulating, 35KW 460 - 3 Coil
  14. R1-E.354-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 2 stage modulating, 35KW 460 - 3 Coil
  15. R1-E.355-G10 Electric Heated Make Up Air Unit with 10" Blower and a 1 stage modulating, 35KW 575 - 3 Coil
  16. R1-E.355-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 1 stage modulating, 35KW 575 - 3 Coil
  17. R1-E.362-G10 Electric Heated Make Up Air Unit with 10" Blower and a 5 stages total, 1 modulating, 36KW 208 - 3 Coil
  18. R1-E.362-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 5 stages total, 1 modulating, 36KW 208 - 3 Coil
  19. R1-E.401-G10 Electric Heated Make Up Air Unit with 10" Blower and a 5 stages total, 1 modulating, 40KW 208 -1 Coil
  20. R1-E.401-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 5 stages total, 1 modulating, 40KW 208 -1 Coil
  21. R1-E.504-G10 Electric Heated Make Up Air Unit with 10" Blower and 2 stages total, 2 modulating, 50KW 460 - 3 Coil
  22. R1-E.504-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and 2 stages total, 2 modulating, 50KW 460 - 3 Coil
  23. R1-E.724-G10 Electric Heated Make Up Air Unit with 10" Blower and 5 stages total, 1 modulating, 72KW 460 - 3 Coil
  24. R1-E.724-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and 5 stages total, 1 modulating, 72KW 460 - 3 Coil
  25. R1-E.765-G10 Electric Heated Make Up Air Unit with 10" Blower and a 2 stage modulating, 76KW 600 - 3 Coil
  26. R1-E.765-G10D Direct Drive Electric Heated Make Up Air Unit with 10" Blower and a 2 stage modulating, 76KW 600 - 3 Coil
  27. R2-E.452-G15 Electric Heated Make Up Air Unit with 15" Blower and a 5 stage total, 1 modulating, 45KW 208 - 3 Coil
  28. R2-E.734-G15 Electric Heated Make Up Air Unit with 15" Blower and a 5 stage total, 1 modulating, 73KW 460 - 3 Coil
  29. R2-E.735-G15 Electric Heated Make Up Air Unit with 15" Blower and a 2 stage modulating, 73KW 575 - 3 Coil
  30. R2-E.1004-G15 Electric Heated Make Up Air Unit with 15" Blower and a 6 stage total, 2 modulating, 100KW 460 - 3 Coil
  31. R2-E.1195-G15 Electric Heated Make Up Air Unit with 15" Blower and a 5 stage, 1 modulating, 119KW 575 - 3 Coil
  32. R3-E.522-G18 Electric Heated Make Up Air Unit with 18" Blower and a 6 stage total, 2 modulating, 52KW 208 - 3 Coil
  33. R3-E.642-G18 Electric Heated Make Up Air Unit with 18" Blower and a 6 stage total, 2 modulating, 64KW 208 - 3 Coil
  34. R3-E.1224-G18 Electric Heated Make Up Air Unit with 18" Blower and a 6 stage total, 2 modulating, 122KW 460 - 3 Coil
  35. R3-E.1225-G18 Electric Heated Make Up Air Unit with 18" Blower and a 5 stage total, 1 modulating, 122KW 575 - 3 Coil
  36. R3-E.1434-G18 Electric Heated Make Up Air Unit with 18" Blower and a 6 stage total, 2 modulating, 143KW 460 - 3 Coil
  37. R3-E.1755-G18 Electric Heated Make Up Air Unit with 18" Blower and a 6 stage total, 2 modulating, 175KW 575 - 3 Coil
  38. R4-E.972-920 Electric Heated Make Up Air Unit with 20" Blower and a 10 stage total, 4 modulating, 97KW 208 - 3 Coil
  39. R4-E.1684-920 Electric Heated Make Up Air Unit with 20" Blower and a 6 stage total, 2 modulating, 168KW 460 - 3 Coil
  40. R4-E.1685-920 Electric Heated Make Up Air Unit with 20" Blower and a 6 stage total, 2 modulating, 168KW 575 - 3 Coil
  41. R4-E.2144-920 Electric Heated Make Up Air Unit with 20" Blower and a 10 stage total, 4 modulating, 214KW 460 - 3 Coil
  42. R4-E.2685-920 Electric Heated Make Up Air Unit with 20" Blower and a 10 stage total, 4 modulating, 268KW 575 - 3 Coil
  43. R5-E.1512-925 Electric Heated Make Up Air Unit with 25" Blower and a 12 stage total, 8 modulating, 151KW 208 - 3 Coil
  44. R5-E.2574-925 Electric Heated Make Up Air Unit with 25" Blower and a 12 stage total, 4 modulating, 257KW 460 - 3 Coil
  45. R5-E.2575-925 Electric Heated Make Up Air Unit with 25" Blower and a 12 stage total, 4 modulating, 257KW 575 - 3 Coil
  46. R5-E.3344-925 Electric Heated Make Up Air Unit with 25" Blower and a 12 stage total, 4 modulating, 334KW 460 - 3 Coil
  47. R5-E.4155-925 Electric Heated Make Up Air Unit with 25" Blower and a 12 stage total, 4 modulating, 415KW 575 - 3 Coil
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