T-340
7–12
NOTE
When Oakite Compound No. 32 is used for the first time, the local Oakite Technical Service representa
-
tive should be called in for suggestions in planning the procedure. The representative will advise the
reader on how to do the work with a minimum dismantling of equipment: how to estimate the time and
amount of compound required; how to prepare the solution; how to control and conclude the de-scaling
operation by rinsing and neutralizing equipment before putting it back into service. The representative’s
knowledge of metals, types of scale, water conditions and de-scaling techniques will be highly useful.
Summary of Procedure:
1. Drain water from condenser tubing circuit.
2. Clean water tubes with Oakite Aluminum Cleaner) 164 to remove mud and slime.
3. Flush.
4. De-scale water tubes with Oakite No. 32 to remove scale.
5. Flush.
6. Neutralize.
7. Flush.
8. Put unit back in service under normal load and check head (discharge) pressure.
Detailed Procedure:
1. Drain and flush the water circuit of the condenser coil. If scale on the tube inner surfaces is accompanied by
slime, a thorough cleaning is necessary before de-scaling process can be accomplished.
2. To remove slime or mud, use Aluminum Cleaner® 164. Mixed 170 grams (6 ounces) per 3.785 liters (1 U.S.
gallon) of water. Mix cleaner in one half the volume of water, while stirring, and then add remaining water.
Warm this solution and circulate through the tubes until all slime and mud has been removed.
3. After cleaning, flush tubes thoroughly with fresh clean water.
4. Prepare a 15% by volume solution for de-scaling, by diluting Oakite Compound No. 32 with water. This is
accomplished by slowly adding 0.47 liter (1 U.S. pint) of the acid (Oakite No. 32) to 2.8 liters (3 U.S. quarts)
of water.
WARNING
!
Oakite No. 32 is an acid. Be sure that the acid is slowly added to the water. DO NOT PUT
WATER INTO THE ACID - this will cause spattering and excessive heat.
WARNING
!
Wear rubber gloves and wash the solution from the skin immediately if accidental contact
occurs. Do not allow the solution to splash onto concrete.
5. Fill the tubes with this solution by filling from the bottom (see
).