B Series Degreaser Maintenance
Rev G Page 96
5.7.2 Cleanout Steps
Note: Check the solvent routinely for acidity. Acid can be introduced in two ways; under certain
conditions, solvents can break down to become acidic or the soils being cleaned may be
acidic. Consult the solvent manufacturer to determine the best method of checking acidity.
1. Without cleaning any parts, operate the degreaser for at least 4 hours to purify the
solvent in the ultrasonic sump.
2. Shut off and lock out electrical power.
3. Drain the water separator and ultrasonic sump into suitable containers. Check for
acidity or degradation. If the solvent is acid or degraded, dispose of it in accordance
with local regulations. If the solvent is acceptable, it will be returned to the degreaser at
the end of the procedure.
4. Drain the boiling sump. This solvent must either be reclaimed in a still or disposed of i
n
a
ccordance with local regulations.
5. Remove all dirt, chips and sludge. Most contaminants may be removed by brushing
with a stiff brush and rinsing with solvent. You may have to scrape off hardened or
caked on sludge with a paint scraper or similar tool. Clean the heater elements to remove
all baked on sludge. Sludge buildup may cause overheating leading to acidic solvent or
heater failure.
Caution: Do not use a carbon steel wire brush on stainless steel tanks or plumbing components. If
you use rags or other absorbent materials, be sure to dispose of them properly.
6. Brush out the condensate trough and make sure that there are no obstructions to
condensate flow. Take care to avoid damage to corrosion resistant finishes.
7. Brush the condensing coils, walls and tank bottoms to remove all accumulated residues.
8. If the solvent tested positive for acid, follow acid cleanout procedures.
9. Close the drain valves and refill with previously drained solvent. Add new solvent as
required.
10. Check for leaks.
11. Restart following initial startup procedures.
5.8 Acid Cleanout Procedures
A degreaser that has become acidic can be neutralized and repassivated. Complete removal of all
solid residues from the cleaner and associated plumbing is essential to avoid recurrence of the acid
condition.
All exposed surfaces of the cleaner, pipes, fittings and valves must be neutralized with special
attention being given to corners and seams. To do so:
a. Using a medium stiff bristle brush, scrub the interior of the degreaser with a 5% baking
soda and water solution (approximately 1/2 lb. per gallon.)
b. Thoroughly rinse the system, including all plumbing and associated equipment, with
water and flush out all residue.
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