Groen TDB/8-20-CFC Operator's Manual page 9

middle of the sight glass. Since the
water you are adding must raise the
level in the whole jacket, a substantial
amount of water is needed to make a
small change in the level.
d. Replace the plug in the elbow.
3. Water Treatment Procedure
WARNING
TO AVOID INJURY, READ AND FOLLOW
ALL PRECAUTIONS STATED ON THE
LABEL OF THE WATER TREATMENT
COMPOUND.
Obtain water treatment compound and a pH test
kit from your supplier, or directly from your
Groen Parts Distributor.
a. Place exactly one gallon of water in the
mixing container. Distilled water is
recommended.
b. Hang a strip of pH test paper on the rim
of the container. Allow about one inch
of the strip below the surface of the
water.
c. Measure the water treatment compound
you will be using. (One way to do this is
to add the compound to the water from a
measuring cup.)
To add water to the jacket,
remove the fill plug.
(Note the venting holes)
d. Stir the water continuously, while you
slowly add water treatment compound,
until the water reaches a pH between
10.5 and 11.5. Judge the pH by
frequently comparing the color of the
test strip with the color chart provided in
the pH test kit.
Color blind people mixing the treated
water solution must use an electro-
analytical instrument to measure pH or
have a person who is not color blind
check the test strip color level.
e. Record the exact amounts of water and
treatment compound used. These
amounts may be used again, if the same
sources of water and compound are
used to refill the jacket in the future.
However, it is advisable to check the pH
every time treated water is prepared.
5. Component Replacement
WARNING
BEFORE REPLACING
DISCONNECT THE UNIT
ELECTRIC POWER SUPPLY.
Internal wiring is marked as shown on the
circuit schematic drawings. Be sure that new
components are wired in the same manner
as those being replaced.
OM-TDB/8-20-CFC
ANY PARTS,
FROM THE
OM-TDB/8-20-CFC 9