23
7. Connection
7.3.3 Cooling water supply
7.3.3.1 City cooling water connection
Fit the line to the machine without reduction of cross section and if possible
without bends. The heat balance of the machine is optimally set to 12 °C (53.6 °F)
cooling water inlet temperature and a uniform pressure of 2 - 4 bar (29 - 58 psi).
(Minimum pressure 2,0 bar (29 psi); Maximum pressure 6,0 bar (87 psi).
P 240 P 300
P 300 USA P 350 USA
________________________________________________________________________
Cooling water peak demand
2 - 4 bar /29 - 58 psi (12 °C /53.6 °F). l/min. 7.0 9.0
USgal/min. 1.8 2.4
For safety reasons a water flowback stop and venting device should be installed.
7.3.3.2 Cooling tower operation
We recommend cooling towers from our partner company Geiger D-78224 Singen
for P 240 /P 300 USA: Type WH5-W6
P 300 /P 350 USA: Type WH7-W6
At a cooling tower operation the pipes to and from the machine must be at least
one nominal size larger. Respectively the dimensions must be according to the
nominal size of the pump. Inlet temperatures should not exceed 24 °C (75.2 °F)
as otherwise solvent consumption would increase and the drying time could be longer.
If the temperatures of the cooling water are too high the refrigeration unit may be overloaded.
Water pressure must be adapted to the higher inlet temperature up to
double the max. requirement.
With re-chilling the correct installation is especially important. Among other things,
the following must be taken into account: cooler performance, switch-over to public city
water supply, low temperature storage, pump size, cooling water valve by-pass.
The cooling water regulator for the distillation must be by-passed (continuous water flow).
The cooling water regulator of the refrigeration unit should be exchanged with a regulator
one size larger.
The cooling water supply respectively the feeding of the cooling tower must be from the
city water net or from a soft water system.
703868-26-0
To Next Page
Loading...