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D.
Submerge the entire condenser in a tank of water.
E.
If any air bubbles come from the condenser, replacement is necessary.
NOTE: The condenser cannot be repaired and must be replaced as a unit.
CONDENSER TEST FOR SCALE. Test the condenser for scale as follows:
A.
Adjust the water throttling valve so that just a puff of steam issues from the condenser vent.
1.
In extreme cases of s-ale, steam will always blow from the condenser vent, even when the water throttling
valve is completely open.
2.
Ensure that a minimum water pressure of 40-psi is maintained. A drop in water pressure will cause steam to
blow from the condenser because of inadequate cooling.
B.
Place a hand on the water discharge tubing and note the temperature.
1.
If the discharge pipe is very hot (from 150° to 200°F), probably very little scale is present.
2.
If the discharge pipe is cool enough to hold, the condenser may be scaled.
C.
Remove the condenser if the discharge pipe is cool enough to hold. Inspect the interior of the condenser for
scale. If scale is present, pour the acid cleaning solution (see "Hard Scale Removal") into the condenser through one of
the water connections.
WARNING: DO NOT ADD THE ACID CLEANING SOLUTION RAPIDLY BECAUSE IF ANY BICARBONATE SCALE
IS PRESENT, GAS WILL BE RELEASED IN CONSIDERABLE AMOUNTS.
D.
Install the condenser on the still.
HEATING ELEMENT TEST AND REPLACEMENT. Whenever a heating element is suspected of not operating properly,
test and, if necessary, replace the heating element as follows:
A.
Remove the bottom plate from the still evaporator. Disconnect the electrical leads and bus bars from the heating
element terminals. Tag the leads to facilitate reassembly.
B.
To test each heating element for an open circuit, apply a current across the terminals. Use a test light in series
with the applied current. If the test light does not light, the heating element is burned out. Mark the damaged heating
elements.
C.
To test each heating element for a short circuit, connect one test lead to the boiler bottom and the other to each
terminal (one at a time). If the heating element is short circuited, the test light will light. Mark all damaged heating
elements.
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