Symbol on panel

Primary temperature controller

Secondary temperature controller

Flue gas temperature controller

Draught controller

TC₁OP

TC₁A₁

TC₁A₂

TC₂OP

TC₂A₁

TC₂A₂

TC₃OP

TC₃A₁

TC₃A₂

DC₁OP

DC₁A₁

DC₁A₂

Set point (˚C)

650

100

770

875

850

880

250

350

370

0.02

2

1.5

Action

Primary burners on/off

Cool down proved

Load inhibit

Secondary burners high/low

Preheat

Dilution damper open

Water spray

Burners off

Low draught plant shut down

1.5 & 2.0 primary chamber draught should be within this range