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R851B - Electronic Step Control Control

The Caloritech™ R851B Electronic Step Control is frequently used in boiler and duct heater systems to bring on stages a few seconds apart. As the process reaches set point, stages will drop out until the required heat balances the losses. Under steady state operation, some stages remain on and one or two stages may cycle to maintain straight line control.

Features

  • Models available to support 4 or 8 stages
  • Dimensions are 6 3/4" x 5" x 3"

Specifications

Models available to support 4 or 8 stages
0-135 Ω 2-10 VDC 4-20 mA input signal
10 Amp 240 VAC MAX relay rating
24 VAC power
Dimensions are 6 3/4" x 5" x 3"