Preventive Maintenance
This section describes actions the operator must take to keep warranty coverage of the unit and to keep
the unit working safely and efficiently.
1. Jacket Vacuum
Every day, while the kettle is cold, read the pressure/vacuum gauge. A positive pressure reading or a
vacuum reading between zero and 20 on the pressure/vacuum gauge indicates an excess of air in the
jacket. Air in the jacket slows the heating of the kettle and sometimes keeps the kettle from reaching the
desired operating temperature. To remove air:
a. Start the kettle. (See the "Operation" section of this manual).
b. Make sure the elbow on the outlet of the safety valve is
turned so it will direct escaping steam down toward the
floor.
c. When the pressure/vacuum gauge reaches a positive
pressure reading of 5 PSI, release entrapped air and steam
by lifting the lever on the safety valve for about 1 second.
Repeat this step, then let the valve lever snap back into the
closed position, so the valve will seat properly and not leak.
WARNING: AVOID ANY EXPOSURE TO THE STEAM BLOWING OUT OF THE SAFETY
VALVE. A SEVERE BURN CAN RESULT ON EXPOSED SKIN.
2. Safety Valve
WARNING: FAILURE TO PERIODICALLY CHECK SAFETY VALVE OPERATION COULD RESULT
IN PERSONAL INJURY AND/OR DAMAGE TO EQUIPMENT.
WARNING: WHEN TESTING, AVOID ANY EXPOSURE TO THE STEAM BLOWING OUT OF THE
SAFETY VALVE. DIRECT CONTACT COULD RESULT IN SEVERE BURNS.
At least twice a month, the safety valve should be tested. Test the valve with the kettle operating at 15 psi
(105 kPa), by holding the test lever for at least 5 seconds. Then release the lever and permit the valve to
snap shut. If the lever does not activate, or there is no evidence of discharge, or the valve leaks,
immediately discontinue use of the kettle and contact a qualified service representative.
3. Jacket Filling
Every day, before you turn on the unit, make sure the water
level is between the marks on the water gauge glass. The
jacket was filled at the factory with the proper amount of treated
water. From time to time, you may need to restore the water to
its proper level, either because water was lost as steam during
venting or because treated water was lost by draining. The
procedure for adding water follows.
a. If you are replacing water lost as steam, use distilled water.
Do not use tap water. If you are replacing treated water
that was drained from the jacket, prepare more treated
water as directed below.
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