Cleaning Supplies Needed - Carrier PrimeLINE 69NT40-561-200 Operation And Service Manual

7.13.1

Cleaning Supplies Needed

• Oakite Aluminum Cleaner® 164, available as a powder in 20 kg (44 lb) pails and 205 kg (450 lb) drums.
• Oakite Composition No. 32, available as a liquid in cases, each containing 3.785 liters (4 U.S. gallon) bottles
and also in carboys of 52.6 kg (116 lbs) net.
• Fresh clean water.
• Acid proof pump and containers or bottles with rubber hose.
When Oakite Compound No. 32 is used for the first time, the local Oakite technical service representative
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.
7.13.2 Cleaning Procedure Summary
1. Turn the unit off and disconnect main power.
2. Disconnect the water pressure switch tubing by loosening the two flare nuts. Install a 1/4 inch flare cap on
the water-cooled condenser inlet tube (replaces tubing flare nut). De-scale tubing if necessary.
3. Drain water from the condenser tubing circuit.
4. Clean the water tubes with Oakite Aluminum Cleaner® 164 to remove mud and slime.
5. Flush.
6. De-scale the water tubes with Oakite No. 32 to remove scale.
7. Flush.
8. Neutralize.
9. Flush.
10. Put the unit back in service under normal load and check head (discharge) pressure.
7.13.3 Cleaning Procedure Detailed
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. Mix 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 the 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.
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.
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
T-362
NOTE
WARNING
!
WARNING
!
Figure
7–14
7.8.