How do I adjust the setpoint on a Siemens TH 356 Pneumatic Thermostat?

[MacPiper]

Adjusting the setpoint on your Siemens TH 356 Pneumatic Rigid Bulb LIMITEM requires a few careful steps. First, remove the thermostat's cover using a screwdriver. Inside, you'll find a dial adjustment. To change the setpoint, use a screwdriver to turn this dial to your desired temperature setting. For visual guidance, refer to Figure 8 in the Siemens TH 356 manual. Next, calibrate the thermostat. Use a reliable test thermometer to measure the temperature at the bulb. Adjust the dial to match the bulb temperature; again, use a screwdriver for this, and do not attempt to adjust it by hand. If there isn't a permanent return air gauge, use the pressure test port. Loosen the test port and connect a 3/16-inch ID rubber hose to a test gauge. Ensure the return pressure reads 7 to 8 psi (48-55 kPa) by adjusting the dial. Then, align the dial with the bulb temperature by loosening the dial screws and turning the dial until the temperature on the dial matches the temperature at the bulb. Tighten the screws to secure the setting. Once the dial and bulb temperature are aligned, your thermostat is calibrated and ready to use at your desired setpoint. Always consult the Siemens TH 356 manual for detailed instructions and safety precautions before making any adjustments.