Blodgett 40GS-KLS Series - Manual (Page 16)

14 OM-40GS-KLS
Maintenance
C. 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 air-tight, but over time steam may be vented
and water lost.
From time to time, you may need to restore the water to its proper lever either
because it was lost as venting steam or by draining. 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 on next
page.
Allow the kettle to cool completely. The procedure will be easier with the kettle
under vacuum (pressure gauge reading below zero).
1.
Make sure the fill (gate) valve is closed, and remove the square head pipe plug
with open-ended wrench or crescent wrench.
2. Position a funnel in the opening and fill it with properly treated water.
3. Slowly open the fill valve to allow water to be sucked into the jacket. Quickly
close the valve to prevent air from entering.
4. Check water level in the jacket to ensure that it is between minimum and
maximum marks on glass.
5. Close the valve and reinstall the square-head pipe plug.
6. Reestablish the jacket vacuum as described above. If the pressure gauge does
not show a negative reading of 20 to 30 inches mercury (Hg).
D. Water Treatment
1. Fill a mixing container with the amount of water required. Use only distilled water.
2. Following instructions apply to Water Treatment Kit.
a. 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.
b. 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 kit.
c. Use a measuring cup to add the compound so that you may record the
exact amount used.
d. 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.
WARNING
TO AVOID INJURY, READ AND FOLLOW ALL
PRECAUTIONS STATED ON THE LABEL OF
THE WATER TREATMENT COMPOUND.