Sterlco GC Series Central Chiller - Manual (Page 43)

GC Series Central Chillers Chapter 5: Maintenance 43 of 79
5-4 Maintaining the Evaporator
Dirty evaporator heat exchange surfaces reduce system capacity and efficiency. Remove dirt
and slime in the evaporator by reverse-circulating with a mild detergent and water solution.
Remove mineral deposits by reverse-circulating Non-Acid De-Scaling Solution (Part No.
216.00017.00). Follow the directions on the container.
To perform the evaporator flush
1. Close the evaporator process inlet and outlet butterfly valves.
2. Open the upper and lower evaporator ball valves to drain the process fluid from the
evaporator.
3. Connect an isolated pumping system (similar to ACS Part number 602.83607.00) to
the upper and lower evaporator ball valves with the inlet to the lower valve and the
outlet to the upper valve
4. Operate the pumping system until there is no visible debris returning to the tank, or
for a minimum of 30 minutes.
5. Drain the flushing fluid and connect a fresh water source to the ball valves and flush
the evaporator with clean water for a minimum of 5 minutes.