Groen TDB 48A, Operator'S Manual

Page: 17 / 37

OM-TDH/TDHC 17
Maintenance
WARNING
TO AVOID INJURY, READ AND FOLLOW
ALL PRECAUTIONS STATED ON THE
LABEL OF THE WATER TREATMENT
COMPOUND.
D. Jacket Filling
Every day, before you turn on the unit, make sure the water level is
approximately in the center of the water gauge glass. The jacket was filled at
the factory with the proper amount of treated water, and is airtight, but over
time steam may be vented and water lost.
From time to time, you may need to restore the water to its proper level. The
procedure for adding water follows.
1. 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.
2. Allow the kettle to cool completely. Remove the pipe plug from the jacket
fill assembly. Pour in the distilled or treated water. Using a funnel will help
you in this process. Hold the pressure relief valve open while you pour, to
let air escape from the jacket. Continue adding water until the water level
rises to the center of the round sight glass.
3. Air that gets into the jacket during the filling operation must be removed,
because it will make heating less efficient. Follow the procedure in Jacket
Vacuum/Removing Air From Jacket above, to restore a negative pressure
reading.
E. Water Treatment
1. Fill a mixing container with the amount of water required. Use only distilled
water.
2. Hang a strip of pH test paper on the rim of the container, with about 1 inch
of the strip below the surface of the water.
3. Stir the water continuously, while you slowly add water treatment
compound until a color between indicating a pH of 10.5 and 11.5 is
reached. (Shown on the pH test kit chart.) Judge the pH by frequently
comparing the test strip with the color chart provided in the pH test kit. If
there is a problem distinguishing color, use a pH meter.
4. Use a measuring cup to add the compound so that you may record the
exact amount used.
5. The amount may be used again, if the same water sources and compound
are used in the future. However, it is best to check the pH each time
treated water is prepared.
Model Kettle Capacity Jacket Capacity
TDH-20 (C,A), TDHC-20 (C,A) 5 gal (20 qt), 19 liter 6 quart, 5.7 liter
TDH-24 (C,A), TDHC-24 (C,A) 6 gal (24 qt ), 23 liter 6 quart, 5.7 liter
TDH-40 (C,A), TDHC-40 (C,A) 10 gal (40 qt), 38 liter 12 quart, 11.4 liter
TDH-48 (C,A), TDHC-48 (C,A) 12 gal (48 qt), 45 liter 12 quart, 11.4 liter
The pressure relief valve and fill
plug are located directly behind the
pressure/vacuum gauge.
WARNING
USE OF ANY REPLACEMENT PARTS OTHER
THAN THOSE SUPPLIED BY THE
MANUFACTURER OR THEIR AUTHORIZED
DISTRIBUTORS CAN CAUSE INJURY
TO THE OPERATOR AND DAMAGE TO
THE EQUIPMENT AND WILL VOID ALL
WARRANTIES.
CAUTION
INSURE ELECTRICAL POWER IS REMOVED
AND THE GAS IS TURNED OFF AT THE
SHUTOFF VALVE PRIOR TO PERFORMING
ANY MAINTENANCE ON THIS KETTLE.
WARNING
THIS KETTLE IS DESIGNED TO BE
WATER RESISTANT. FAILURE TO FOLLOW
PROPER MAINTENANCE PROCEDURES
MAY VOID THE WARRANTY.