T-340
7–14
Figure 7.8 Water-Cooled Condenser Cleaning - Gravity Circulation
1) Fill condenser with cleaning
solution. Do not add solution more
rapidly than vent can exhaust
gases caused by chemical action.
2) Approximately 5’
3) Condenser
4) Vent pipe
5) 1” pipe
- - - - -
8. When de-scaling is complete, drain the solution and flush thoroughly with water.
NOTE
If condenser cooling water is not being used as drinking water or is not re-circulated in a closed or tower
system, neutralizing is not necessary.
9. Following the water flush, circulate a 56.7 gram (2 ounce) per 3.785 liter (1 U.S. gallon) solution of Oakite
Aluminum Cleaner® 164 thru the tubes to neutralize. Drain this solution.
10. Flush the tubes thoroughly with fresh water.
11. Put the unit back in service and operate under normal load. Check the head pressure. If normal, a thorough
de-scaling has been achieved.
What You Can Do For Further Help:
Contact the Engineering and Service Department of the OAKITE PRODUCTS CO., 675 Central Avenue, New
Providence, NJ 07974 U.S.A. (or visit www.oakite.com) for the name and address of the service representative in
your area.
7.13 Filter Drier
On units equipped with a water-cooled condenser, if the sight glass appears to be flashing or bubbles are con
-
stantly moving through the sight glass, the unit may have a low refrigerant charge or the filter drier could be par
-
tially plugged.
7.13.1
Checking the Filter Drier
1. Test for a restricted or plugged filter drier by feeling the liquid line inlet and outlet connections of the drier
cartridge. If the outlet side feels cooler than the inlet side, then the filter drier should be changed.
2. Check the moisture-liquid indicator. If the indicator shows a high level of moisture, the filter drier should be
replaced.
3’ to 4’