Invensys Thermostat Manual Model Fd Apr 2026

Turn the bypass adjustment screw (marked 'B') until the flame is stable across the entire burner. : Calibration is done manually on the face of the unit.

Loosen the screws on the dial knob, manually set the knob to the actual measured temperature of the oven, and retighten the screws to align the dial. Invensys Thermostat Manual Model Fd

For detailed installation diagrams, you can refer to the Robertshaw VC4200 Commercial Installation Guide or the Invensys Heating and Cooling Basics Manual . Turn the bypass adjustment screw (marked 'B') until

: Available in single-valve (normal throttle action) or dual-valve (snap throttle action for high-capacity needs). For detailed installation diagrams, you can refer to

: If you have a digital Invensys model (like the 9000 series) rather than the mechanical FD, "LO" typically indicates a low battery or that the room temperature is below 30°F.

Because this model is entirely mechanical, adjustments are physical rather than digital. :

Push and hold the red button fully in, then light the pilot.