To Process outlet
Fill/drain port
(continued)
heat the acid solution.
2 Disconnect and/or lockout main power to the chiller.
3 Shut the “To” and “From Process” valves (factory optional) and the drain reservoir. See Installation section entitled, Drain Connection.
4 Remove the chiller’s side panels.
5 Disconnect the pump from the heat exchanger. Install a cap in the opening of the heat exchanger where the pump was connected.
✐
From Process inlet
Water level gauge
Prepare a 5% solution of Phosphoric acid or Oxalic acid and water. Do not
1
Cleaning the Brazed Plate Evaporator
Minerals and other contaminants produce deposits, scales, slime or algae on the heat transfer surfaces exposed to water. Fouled surfaces could result in decreased cooling capacity. Implement a water treatment program to slow the fouling.
CAUTION: Hot Surfaces
Always protect yourself from hot surfaces when working on the chiller, espe- cially when working on or around the compressor and condenser. These devices can reach over 160°F {71°C}. Allow these devices to cool before performing any maintenance or troubleshooting.
Water quality should be maintained at a pH level of 7.4, but not less than 6.0 for proper heat exchanger life.
To clean the brazed plate adapter:
5 e c n a n e t n i a M
NOTE: These connections may vary depending on the model you have purchased. Be sure to see the labeling on your particular unit.
M a i n t e n a n c e l 5 - 5