Conair EARTHSMART UGH031-0209 User Manual
Page 45
C l e a n i n g t h e B r a z e d P l a t e E v a p o r a t o r
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:
1
Prepare a 5% solution of Phosphoric acid or Oxalic acid and water. Do not
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.
M a i n t e n a n c e l
5 - 5
NOTE: These connections
may vary depending on the
model you have purchased.
Be sure to see the labeling on
your particular unit.
✐
5
Maintenance
From Process inlet
To Process outlet
Fill/drain port
Water level gauge
(continued)