Controls Pod Removal: A. Loosen 1 screw either side, front of boiler then slide out and down. B. Drop down panel can be lifted off via the hinges to allow easier access. PCB / Terminal Block Access: C. 2 screws either side under cover then PCB housing slides forward and down. Combustion Chamber Access: D. One screw on top of boiler and two screws at the bottom either side then case pulls forwards and off.
This model does not cover the optional Programmer Kit or Sealed System Unit