BUCHI KjelSampler K-377 - Manual (Page 50)

5 Putting into operation
50 K-375/376/377 Operation Manual, Version B
ቢ
ባ
ቤ
ብ ቦ
ቧ ቨ
a H 2
O pump (for steam generator and sample
tube)
b Boric acid (H 3
BO
3
) pump
c NaOH pump
d Waste outlet (receiver waste)
e Waste outlet (sample tube waste)
f Cooling water outlet
g Cooling water inlet
Fig. 5.5: Reagent, water and waste connections
NOTE:
All pumps are self-priming, no overpressure is necessary at the tanks!
If the sample tube waste and the receiver waste shall be collected in the same tank, the Y-piece
(contained in the standard delivery) can be used to merge both tubes.
Cooling water connection
Screw the cooling water hose to the cooling water inlet on the device side and connect it to the
water supply. The water pressure should not exceed 4 bar and the cooling water temperature should
not exceed 25 °C. The flanged screw coupling for the water connection has a standard screw thread
of G
3 /
4
“.
Drain cooling water
Place the drain hose for the cooling water directly into the drain (sink). For this purpose, shorten the
silicone hose to the optimal length.
Make sure that the drain hose has no kinks and sharp bends.
Secure the drain hose to avoid any flooding inside or in the vicinity of the instrument.
Waste/aspiration hoses
The sample residue can be aspirated and collected separately from the receiver waste. For this
purpose a separate collection tank is necessary. The collection tank must be located lower than the
device to guarantee proper drainage.
Connect the waste hose to the waste outlet and place it directly into the collection tank. For this
purpose, shorten the EPDM hose to the optimal length. In order to prevent any back-flow, the hose
may be placed maximum 10 cm into the tank.