: Two side screws allow for manual adjustment of the pilot (P) and bypass (B) functions. Operating & Calibration Instructions

The (often branded under Robertshaw as the VC4200 series ) is a mechanical, heavy-duty commercial gas thermostat primarily used for high-capacity cooking equipment like deck ovens, pizza ovens, and convection ranges . Unlike modern residential digital thermostats, this model uses a throttling mechanism to provide precise temperature regulation for gas appliances. Key Specifications & Features Application : Designed for commercial gas-fired equipment.

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.

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

: Features "In" (incoming supply) and "Out" (main burner supply) ports.

: Available in single-valve (normal throttle action) or dual-valve (snap throttle action for high-capacity needs).

Adjust the pilot flame to a height of approximately 1/2 inch using the adjustment screw (marked 'P'). :