Techne TU-20D - Manual (Page 22)

and moulding and use the screw to fit the cooling coil in the slots. Keep the moulding in a safe place
in case you need to replace it. Connect a hose from a tap to one end of the coil and from the other
end of the coil to drain. Adjust the water flow to give the required cooling.
11 For lower temperatures, a Dip Cooler such as a Techne RU-200 or RU-500 or a Flow Cooler such as
the FC-200 or FC-500 is required. Alternatively you could use either the RB-5A or the RB-12A Techne
refrigerated baths, which have integrated fridge coils and no additional cooling mechanism is
required.
See the individual instruction manuals for installation information.
12 If a thermometer is to be used, it may be fitted in the end of the top cover of the thermoregulator
between the two lugs, using the O-ring supplied with the unit. If a bridge piece is fitted, it is
necessary to remove the bung (5) to insert the thermometer through the plate into the bath.
13 Fill the bath to between the minimum and maximum levels stated in the specification. If water is
used, demineralised water is preferred to reduce the formation of scale. If scale should form, use
only mild de-scaling agents to remove it. DO NOT attempt to hammer, chip or scrape the deposits
from the surface of the bath.
14 Recommended liquids:
Temperature Liquid
-40°C to 0°C 40% water, 40% ethylene glycol and 20% alcohol
-20°C to 30°C 50% water and 50% ethylene glycol
5°C to 95°C Water, preferably de-ionised with neutral pH
10°C to 150°C Dow Corning Silicone Oil 200 series *
10°C to 250°C Dow Corning Silicone Oil 210H/100cs series *
*Warning: check gel life at top end of range.
Extraction may be necessary at high temperatures; always check the manufacturer’s data and safety
sheets before using any of the liquids.
In all cases the OVER-TEMPERATURE CUT-OUT must be set correctly for the liquid being used and
the temperature at which it is to operate.
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Lugs
O Ring
Thermometer
Bridge