Techne RB-22A - Manual (Page 15)

P A G E 13
R e f r i g e r a t e d B a t h 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 is covered.
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. Loss of performance will occur if freezing
takes place.
3 To avoid thermal shock do not fill a cold bath 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.
Operating your unit
1 Switch on the thermoregulator 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, will need
to be incorporated in the system. Temperatures are set on and
controlled by the temperature controller, see the appropriate
book.
Daily Maintenance
As mentioned earlier, it is imperative that the air flow is not
impeded in any way. It is important that the grilles are kept clean
and clear at all times. Even dust and fluff can impair the
performance, therefore the units must be used in a clean
environment or they should be regularly cleaned.