Expansion Board for Mk7 Controller: Adds Water Control & Draft Control


Supplied with Software, Housing and Pillars

Product Code



By adding the Autoflame Water Level Expansion Board to the Mk7 Evolution, the following operations become available:

  • Modulating Feedwater Control
  • “2nd Low” Switching Philosophy
  • Shunt Switch Philosophy
  • Bottom Blowdown Management
  • Historical Water Level Alarm Record
  • First Out Annunciation
  • Integration of External Auxiliary Water Level Controls
  • Steam Flow Metering
  • Heat Flow and Hot Water Flow Metering
  • TDS (Total Dissolved Solids) Management


Outputs: 120/230V

Main Voltage Singnal Inputs:

  • At 120V Current Loading Approximately 0.6mA
  • At 230V Curernt Loading Approximately 1.15mA

Refer to Mk7 Electrical Specifications for other general ratings

Water Level Expansion Board