Specifications

Hoses
8.3 Tap water cooling
Only for units without own refrigeration unit!
8.3.1 Connection to cooling (tap) water
Using the cooling coil a lowest operating temperature
approx.
3°C above the given cooling water tempera-
ture can be achieved.
Use hoses with
8 mm internal 0 and connect to the tab
w
water cooling coil W. The direction of the flow can be
freely selected. It must be taken care that at the outlet
side, the water can run out unhindered.
Pressure fluctuations of the public water net may ham-
per the temperature constancy. For proper results the
water pressure should be stable or measures should
be taken to keep it stable.
W
N--67 / \
The min. pressure should not be below 1 bar.
The amount of flow should be set to a min. value. At
Iil
first the full flow should be used so that the unit can
I
reach its operating temperature. Then, the amount of
flow should be reduced using the water cock or a hose
clamp. The actual temperature will rise above the set
temperature if the water flow is insufficient. If so in-
crease the water flow.
8.4 External Cooling Devices
With the flow-through cooler DKI 5 from Thermo Haake, the
heat transfer liquid can be cooled down and the circulator
can be rendered independent of tap water.
The flow-through cooler is hooked up into the return flow line
of the external vessel and from there to the circulator
(seefig-
ure).
The assembly
and application are described in the cooler
instruction manual in detail.