Blodgett KLT-20G Installation Operating & Maintenance Manual page 23

6.0 SERVICE (Continued)
TO ADJUST PRESSURE SWITCH:
1. To obtain access to the pressure switch, the front panel must be removed. Remove the
screws on bottom of the panel. Be sure to support the panel to avoid excessive strain on
the wiring.
2. To increase the pressure switch setting, turn the white ribbed knob clockwise; to decrease,
turn it counterclockwise. Use the centre of the black ring as an indicator.
3. With the kettle empty and completely cold, turn kettle on and set thermostat to maximum
setting (275EF).
4. The pressure in kettle (read pressure gauge on front panel) should reach a maximum of 30
psi and pressure relief valve should not open. Kettle pressure may rise 3 or 4 psi even after
burners shut down.
5. Relief valve should not open when kettle pressure is 45 psi; pressure switch setting is
satisfactory.
6. If the safety relief valve opens, reduce setting on pressure switch, cool kettle completely by
running cold water through it and repeat steps 3 - 6.
7. If pressure in kettle is below 30 psi increase setting of pressure switch, cool kettle
completely by running cold water through it and repeat steps 3 - 7.
8. Allow the kettle to cycle several times to verify the correct pressure setting.
9. Replace the front panel when adjustment is complete.
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