Groen DEE-CE Series, Руководство оператора

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14 OM-DEE/4
Maintenance
CAUTION
KEEP GREASE AWAY FROM ELECTRICAL
PARTS LOCATED NEAR THE GEARS.
WARNING
TO AVOID INJURY, READ AND FOLLOW ALL
PRECAUTIONS STATED ON THE LABEL OF
THE WATER TREATMENT COMPOUND.
WARNING
ELECTRIC POWER ALWAYS SHOULD BE
SHUT OFF BEFORE WORK IS DONE ON
INTERNAL COMPONENTS.
CAUTION
BEFORE YOU HEAT THE KETTLE AGAIN
FOR ANY PURPOSE, TURN THE ELBOW
BACK CLOCKWISE UNTIL THE OPENING
FACES DOWNWARD.
WARNING
DISCONNECT ELECTRICAL POWER FROM
THE UNIT BEFORE ATTEMPTING TO GREASE
THE TRUNNION BEARINGS.
CAUTION
NEVER LEAVE A CHLORINE SANITIZER
IN CONTACT WITH STAINLESS STEEL
SURFACES FOR LONGER THAN 30
MINUTES. LONGER CONTACT CAN
CAUSE CORROSION.
8.
Jacket Vacuum/Removing Air from Jacket
When the kettle is cold, a positive pressure reading on the pressure/vacuum gauge
or a reading near zero indicates that there is air in the jacket. Air in the jacket acts
as an insulator, and slows kettle heating.
To remove air:
a. Start the unit. (Be sure there is water or product in the kettle when heating).
b. When the pressure/vacuum gauge reaches a positive pressure reading of
34.5 kPa (5 psi), release the trapped air and steam by pulling up or out on
the safety valve lever or ring for about 1 second. Repeat this step, then let
the pull ring or valve lever snap back into the closed position.
9.
Jacket Filling and Water Treatment
The jacket was charged at the factory with the proper amount of treated water. You
may need to restore this water, either because it was lost as venting steam or by
draining.
a. If you are replacing water lost as steam, use distilled water. If you are
replacing treated water that ran out of the jacket, prepare more treated
water as directed in “Water Treatment Procedure.”
b. Allow the kettle to cool. Turn the elbow on the safety valve counterclockwise
(to avoid thread damage) until the opening of the elbow faces upward.
c. Open the safety valve and pour the water or treated water in at the elbow
until the water level rises to a point between the marks on the gauge glass.
d. Air introduced to the jacket during filling must be removed to obtain
efficient heating. See “Jacket Vacuum.”
10.
Water Treatment Procedure
a. Obtain water treatment compound and a pH test kit from your
authorized parts distributor.
b. Fill a mixing container with the measured amount of water required.
(See table). Use distilled water only.
c. Hang a strip of pH test paper on the rim of the container, with about
25 mm of the strip below the surface of the water.
d. Measure the water treatment compound. One way to do this is to add
the compound from a measuring cup.
e. Stir the water continuously, while you slowly add treatment compound,
until the water has a pH between 10.5 and 11.5. Judge the pH by
frequently comparing the test strip color with the color chart provided in
the test kit. If you are color blind use an electroanalytical instrument to
measure the pH level or have a person who is not color blind read the
test strip color level.
f. As you add water to the jacket, check water level to ensure that it
is between minimum and maximum marks on gauge. Stop adding water
when it reaches the maximum marker on the gauge.
Kettle Model Jacket Capacity
DEE/4-20 9.5 Liters
DEE/4-40 13.2 Liters
DEE/4-60 15.1 Liters