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Water quality should be maintained at a pH of 7.4, but not less
that 6.0 for proper heat exchanger life.
To clean:
Prepare a 5% solution of Phosphoric acid
or Oxalic acid. Do not heat the acid solution.
Shut the From Process valve.
Disconnect the pump from the heat exchanger.
Install a cap in the opening of the heat exchanger where
the pump was connected.
Connect 1/2-inch tubing to the 1/2-inch
connections of the heat exchanger.
Back-flush the solution through the
heat exchanger and the chiller.
Flush the heat exchanger and the chiller
piping with fresh water after cleaning.
Reconnect the chiller pump to the
heat exchanger. Remove the cap in the heat exchanger
and reconnect the hose from the pump.
C
LEANING THE
EVAPORATOR OR
WATER-COOLED
CONDENSER
UGH016/0500 Series 1 Portable Chillers, TIC Control
MAINTENANCE 5-7
1
2
3
4
5
Acid solution
Fluid circuit
Heat
Exchanger
In
1/2 inch connection on
outside of chiller cabinet
To Process connection
Out
6
7
Out
In
CAUTION: Hot Surfaces
Always protect yourself from hot surfaces when
working on the Portable Chiller, especially when
working on or around the compressor and con-
denser. These devices can reach up to 160 °F
(71 °C). Allow these devices to cool before per-
forming any maintenance or troubleshooting.
Minerals and other contaminants produce deposits, scales,
slime, or algae on the heat transfer surfaces exposed to water.
Fouled surfaces result in decreased cooling capacity.
Implement a water treatment program to slow the fouling.