Turn the thermostat to "OFF" and wait five minutes for any accumulated gas to escape.
The bypass port maintains a minimum flame even when the main valve is closed.
: For digital models, prying the front cover off and removing batteries for 5 minutes often performs a hard reset. Invensys Thermostat Manual Model Fd
To adjust: light the main burner and set the dial to 300°F. Once the temperature is constant, turn the dial back to the lowest setting.
: Available in single-valve (normal throttle action) or dual-valve (snap throttle action for high-capacity needs). Turn the thermostat to "OFF" and wait five
Because this model is entirely mechanical, adjustments are physical rather than digital. :
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. To adjust: light the main burner and set the dial to 300°F
For detailed installation diagrams, you can refer to the Robertshaw VC4200 Commercial Installation Guide or the Invensys Heating and Cooling Basics Manual .