Groen DH-40, Руководство оператора

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OM-DH
14
a. Make sure the fill valve is closed, and
remove the square head pipe plug with
open-ended wrench or crescent wrench.
b. Position a funnel in the opening and fill it with
properly treated water.
c. Slowly open the fill valve to allow water to be
sucked into the jacket. Quickly close the
valve to prevent air from entering.
d. Check water level in the jacket to ensure
that it is between minimum and maximum
marks on glass.
e. Close the valve and reinstall the square-
head pipe plug.
f. Reestablish the jacket vacuum as described
in Paragraph 2, above, if the pressure gauge
does not show a negative reading of 20 to
30 inches mercury (Hg).
4. Water Treatment Procedure
a. Obtain water treatment compound and a pH
test kit from your Groen Service Agent.
WARNING
TO AVOID INJURY, READ AND FOLLOW ALL
PRECAUTIONS ON THE LABEL OF THE
WATER TREATMENT COMPOUND.
b. Fill a mixing container with the measured
amount of water required. (See table).
Distilled water is recommended.
Kettle Model
Approximate Jacket
Capacity
DH-20, DHT-20 2½ Gallons
DH/1-40, DHT/1-40 3½ Gallons
DH-60, DHT-60 4 Gallons
c. 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.
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.
f. As you add water to the jacket, check water
level to ensure that it is between minimum
and maximum marks on glass. Stop adding
water when it reaches the maximum marker
on the gauge.
g. Record the exact amounts of water and
treatment compound needed. These
amounts may be used again, if the same
water sources and compound are used.
However, it is best to check the pH each
time treated water is prepared.
5. Component Replacement
WARNING
B E F O R E R E P L A C I N G A N Y P A R T S ,
DISCONNECT THE UNIT FROM THE
ELECTRIC POWER SUPPLY AND CLOSE THE
MAIN GAS VALVE. ALLOW FIVE MINUTES
FOR UNBURNED GAS TO VENT.
When component replacement involves breaking a
gas pipe connection, check the new connection with
soap solution or an appropriate leak detector.
DO
NOT USE A FLAME TO TEST FOR LEAKS.
Internal wiring is marked as shown on the circuit
schematic drawings (inside control housing and in
this manual). Be sure that new components are
wired in the same manner as old components. An
examination of the circuit schematic shows that the
safety components are wired in series. In most
cases, a faulty component may be isolated with a
jumper wire to verify that the component is faulty. If
this determination is made, contact a certified Groen
Service Agency for assistance.