P A G E 15
D I P A N D F L O W C O O L E R S U S E R ’ S M A N U A L
OPERATION
Precautionary Measures
1 Do not operate any of the fridge units without liquid in the circuit.
Ensure that the evaporation coil on the Dip Cooler is covered.
Ensure that the heat exchanger in the Flow Cooler is full.
2 Freezing may occur if there is insufficient circulation or the
incorrect liquid is used. While this will not harm the unit some
time may pass before the unit can be used again. For this reason
there should always be circulation in or around the coil either in
the bath or in the heat exchanger. This is particularly the case for
the heat exchanger as the passages are small and it cannot be
seen if the unit is frozen. Loss of performance will occur if
freezing takes place. Flow through the heat exchanger should be
at least 10 litres/min at 20
o
C.
3 To avoid thermal shock do not insert a cold cooling coil into, or fill
a cold heat exchanger with, liquids above 40
o
C.
4 Although the practice is not recommended fridge units may
occasionally be subjected to temperatures up to 100
o
C. This is
provided that they are only being used thus intermittently, for
example for cooling down to temperatures below 40
o
C.
5 IN NO CIRCUMSTANCES MAY A REFRIGERATED UNIT BE
SUBJECTED TO BATH/LIQUID TEMPERATURES ABOVE
100
o
C.
6 For continuous use above 40
o
C either remove the coil from the
bath (Dip Coolers) or reconnect the circuit without the heat
exchanger in it (Flow Coolers).
Operating your unit
1 Switch on the thermoregulator or circulator as instructed in the
appropriate book so that good circulation is established.
2 Switch the fridge unit on by pressing the power switch. The
switch and the indicator on the front will light up. The fan and the
compressor will start. It will take a little while for cooling to begin.
3 Remember that as the Fridge units will only extract heat, a
controller, such as a TE-10 or TU-20 thermoregulator or C-85
circulator, will need to be incorporated in the system.
Temperatures are set on and controlled by the temperature
controller, see the appropriate book.
