17
Caution:
Pump pressure
x
Determine and check the max. admissible pressure for the external circuit before
putting the unit into operation. The max. pressure is determined by the weakest
element in the circuit (e. g. glass equipment).
x
Securely attach all tubing to prevent slipping.
Notice:
Flood hazard!
.
In case the system to be cooled is located at a higher level than the recirculating
cooler, take note of bath liquid flowing back when the unit is switched off.
Return flow safety device
Should the filling volume of the bath tank not be sufficient, prevent the liquid from
flowing back by using shut-off valves..
Order No.
Description
Suitable for
8 970 456
Shut-off valve for loop circuit, M16x1
FL1201 / FL(W)1701
8 970 454
Shut-off valve G ¾“
FL1203 / FL(W)1703
The following questions shall help to recognize possible dangers and to reduce
the risks to a minimum.
x
Are all tubes and electrical cables connected and installed?
Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.
x
What to do when a dangerous substance was spilled on or in the unit?
Before starting to work, obtain information concerning the substance and determine
the method of decontamination.
5.1. Tubing
Caution:
x
Employ suitable connecting tubing.
x
Make sure that the tubing is securely attached.
x
Avoid sharp bends in the tubing, and maintain a sufficient distance from
surrounding walls.
x
Regularly check the tubing for material defects (e.g. for cracks).
x
Preventive maintenance: Replace the tubing from time to time.
Recommended tubing:
Order No.
Description
Suitable for
8930308
1 m CR
®
-tubing 8 mm inner dia. (-20 ... +120 °C)
FL1201
8930312
1 m Reinforced tubing 8 mm inner dia. (-40 ... +120 °C)
FL1201
8930319
1 m Reinforced tubing ¾“ inner dia.
(-40 ... +120 °C)
FL(W)1203/1703
Tubing insulation
8930412
1 m Insulation, 18 mm inner dia.
Reinforced tubing 8 mm inner dia.
8930413
1 m Insulation, 23 mm inner dia.
Reinforced tubing 12 mm inner dia.
8930419
1 m Insulation, 29 mm inner dia.
Reinforced tubing ¾“ inner dia.
Tube clamps
8970481
2 Tube clamps, size 2
Reinforced tubing 8 mm inner dia.
8970482
2 Tube clamps, size 3
Reinforced tubing 12 mm inner dia.
8970483
2 Tube clamps, size 4
Reinforced tubing ¾“ inner dia.
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