Crown ECX-16 Installation & Operation Manual page 20

ELECTRIC CABINET BASE CONVECTION STEAMER, ECX-16, ECX-24
8.0 ADJUSTMENTS (Continued)
TO CALIBRATE PRESSURE SWITCHES
CAUTION: Adjusting knob and nut will turn easily until they hit a
stop. Do not over torque. Over torquing may cause damage.
1. Turn the adjusting knob clockwise to the deadband to maximum.
2. Turn the adjusting nut clockwise to maximum.
3. Adjust in the following sequence:
- High limit pressure switch.
- Override pressure switch. (if equipped).
- Operating pressure switch.
- Use relief valve to release pressure from boiler for setting adjustments.
High Limit Pressure Switches
Allow pressure to build until unit shuts off. This should occur at 15 PSI. Set the
adjusting nut to switch off at 14.5 PSI on the gauge.
Override Pressure Switches
Set the adjusting nut to switch off at 13 PSI on the gauge.
Operating Pressure Switches
Set the high signal to switch off at 11 PSI on the gauge.
4. Release pressure in boiler below 9 PSI. The boiler should fire and once the
pressure has reached 11 PSI, the boiler should shut of f. Repeat this process
several times to make sure boiler operates between 9 and 11 PSI.
Once completed, pressure switches have been calibrated.
MANUAL 10063R4
INSTALLATION AND OPERATION MANUAL,
(Continues)
20 2020-07-08