Buchi K-314 User manual

1
BÜCHI Distillation Unit K-314
Contents
Contents
Read these instructions thoroughly before you use the BÜCHI
Distillation Unit K-314. Store these instructions in the imme-
diate vicinity of the apparatus so that they may be consulted at
any time. The unit must only be connected to the mains and
switched on after having completed all necessary preparations.
Chapter 2 contains important safety information. Knowledge
of this is imperative for the safe operation of the Distillation
unit.
Subject to technical change without notice. No part of these
instructions may be reproduced in any form whatsoever or
processed, reproduced or disseminated by means of
electronic or optical systems without the express written
permission of Büchi Labortechnik AG. All rights reserved.
Copyright © Büchi Labortechnik AG 1998
en, Version C (22 pages) Order No.
K-314 Operating instructions 96706
1 Scope of Delivery 2
2 Safety 3
2.1 Symbols 3
2.2 Requirements for the operator 3
2.3 Regulation use 3
2.4 Non-regulation use 3
2.5 General hazards 4
2.6 Safety measures 4
3 Function 6
3.1 Principle of operation 6
4 Putting into operation 7
4.1 Setup location 7
4.2. Unpacking 7
4.3 Water supply 7
4.4 Drain hose 8
4.5 Connection of the supply tanks 8
5 Operation 9
5.1 Control elements 9
5.2 Control elements and their function 9
5.3 Start-up Checklist 10
5.4 Supply tanks 10
5.5 Rubber bung and PTFE hose 10
5.6 Sample tube holder 11
5.7 Distillation outlet tube 12
5.8 Connection to the mains 12
5.9 Adjusting the cooling water flow 12
5.10 K-314 switching ON/OFF checklist 12
5.11 Carrying out the Kjeldahl distillation 13
5.12 Cleaning the unit 13
5.13 Malfunctions 14
6 Maintenance 15
6.1 General information and preparations 15
6.2 Maintenance: daily, weekly 15
6.3 Rubber bung and PTFE hose 15
6.4 Cleaning the feeding pump 16
6.5 Changing glass parts 16
6.6 Customer service 16
6.7 Main fuses 17
6.8 Checking the unit 17
7 Taking out of operation 18
7.1 Storage/Transport 18
7.2 Disposal 18
8 Replacement parts 19
9 Appendix 20

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BÜCHI Distillation Unit K-314
1 Scope of Delivery
1 Scope of delivery
Fig. 2: Enclosed parts
Fig. 1: General view
Accessories:
1 Sample tube 500 mL 26128
1 Rack for 4 sample tubes 500 mL 16951
1 Special rubber bung for 16890
Tecator/Gerhardt glasses
1 Handle with cam for 26109
Tecator/Gerhardt glasses
1 Indicator acc.Sher, 100 ml 03512
Table 3: Accessories
Description Order No.
Versions:
220 - 240V 50/60 Hz
K-314 complete 37961
Table 1: Versions
Enclosed parts:
1 Digestion tube 03904
1 Distillate outlet tube complete 26301
1 Pair of glass tongs 02004
1 Drip tray 26290
1 Water supply complete 10992
3 Nyflex hose ø 14/8 mm to 1,5 m 04113
2 Silicone hose ø 9/6 mm to 1,5 m 04133
2 Flow-through tube ø 8/6 mm 26058
1 Hose clamp 22352
1 NaOH tank 10 L, complete 26112
1 Water tank 10 L, complete 26113
1 Mains cable Type CH 10010
Typ Schuko 10016
Type GB 17835
Type AUS 17836
Type USA 33756
1 Operating instructions
German 96705
English 96706
French 96707
Italian 96708
Spanish 96709
Table 2: Enclosed parts

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BÜCHI Distillation Unit K-314 2 Safety
The apparatus has been built in accordance with state-of-
the art technology and recognized safety regulations.
Nonetheless risks and dangers can arise from the
apparatus:
• If the apparatus is operated by insufficiently trained
personnel.
• If the apparatus is not used as directed.
2.1 Symbols
Stop
Information on dangers which can lead to serious damage
to property, to severe or life-threatening injuries.
Warning
Information on dangers which can lead to damage to health
or property.
Please note
Information on technical requirements. Noncompliance can
lead to faults, inefficiency and production losses.
2.2 Requirements for the operator
The unit is only to be used by laboratory and specialist
personnel and other persons, who, because of their training
or professional experience, are able to assess the dangers
which can result while operating the equipment.
Personnel without this training or persons who are in training
require thorough instruction. These operating instructions
are the basis.
2.3 Regulation use
The unit is conceived and built as a piece of laboratory
equipment. Its regulation use is the distillation of steam
volatile substances.
2.4 Non-regulation use
Any use other than those listed as well as any use which
does not correspond to the technical data is a misuse. The
operator bears sole risk for eventual damage related to
such use.
In particular the following uses are not allowed:
• operation in explosion-prone areas
• operation with samples that can explode or ignite due to
impact, friction, heat or sparking.
2 Safety

4
BÜCHI Distillation Unit K-314
2.5 General hazards
General hazards arise from:
• Hot acids and bases
• Combustible gases or vapors in the immediate vicinity
of the apparatus
• Damaged glassware
• Location of the apparatus to close to the wall (see
section 4.1 Set up location)
• Hot surfaces
Except for authorized repair personnel it is forbidden to remove
covers using commercially available tools.
The device must not be put into operation with damaged
glass parts.
Contact with electrically live parts presents a danger to life
and limb!
2.6 Safety measures
The distillation unit K-314 is equipped with a protective
door, which must be closed during operation.
The wearing of personal safety equipment such as safety
glasses, gloves and lllllaboratory coats is necessary.
As a necessary part of the distillation unit K-314, this
instruction manual must at all times be available to the
operating personnel at the location where the apparatus is
being used. This also applies to the further editions in other
languages which may be ordered seperately.
The fusion processing glass must only be removed with
pliers because of danger beeing burnt.
Modifications
Any modifications on the apparatus itself or on replacement
or accessory parts, and any use of replacement or
accessory parts other than those listed in these operating
instructions is permissible only with the express written
approval of Büchi Labortechnik AG.
Responsibilities of the operator
The operator is responsible for providing proper instruction
for his staff. For that purpose, these operating instructions
may also be ordered in other languages.
The operator must inform the manufacturer immediately of
any and all events relevant to product safety that arise
during his operation of the apparatus.
If assuming that a safe operation is not possible any more
the unit must be put out of operation and secured against
unintended further operation.
2 Safety

5
BÜCHI Distillation Unit K-314 2 Safety
It is to be assumed that a safe operation is not possible
any more
• if the unit is visibly damaged,
• If the unit is not functioning any more
• after long storage under anfavourable conditions,
• after being transported under difficult conditions.
The unit must not be operated with combustible substances.
If you need the assistance of Büchi Service, it is required
to indicate and declare eventually remaining dangerous
substances (e.g., as defined in EC guidelines L 360, 1976/
79 or VBG 16) in or on the apparatus for reason of on-the-
job safety or pollution control.

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BÜCHI Distillation Unit K-314 3 Function
3 Function
The distillation unit K-314 is suitable for determining nitrogen
using the Kjeldahl and Devarda methods..
..
. Other steam
distillations (e.g., of alcohol) can also be carried out easily.
3.1 Principle of operation
햲Sample tube
햳Splash protection
햴Cooler
햵Distillate outlet tube
햶Receiving vessel
햴
햵
햳
햶
햲
Fig. 3: Principle of operation K-314

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BÜCHI Distillation Unit K-314 4 Putting into operation
4 Putting into operation
4.1 Setup location
The distillation unit must be installed on a stable, clean and
flat base.
For reasons of safety, a gap of at least 30 cm must be left
open between the back of the machine and the wall or
other objects. Never place any containers, chemical
products or other equipment behind the distillation unit.
4.2 Unpacking
The original package must be kept for possible later
transport.
If the package has been damaged, check the machine
carefully for broken glass or damage to the housing.
Make certain that the socket voltage is the same as that
shown on the machine nameplate. Always connect the
machine to an earthed (grounded) socket. This avoids risks
due to an internal defect.
4.3 Water supply
The distillation unit K-314 is delivered with 3 Nyflex high-
pressure hoses intended for the following connections:
• cooling water inlet
•H
2O supply tank
• NaOH supply tank
Connect the cooling water connector to the mains water tap.
The standard sleeve nut has an R 1/2” thread (Fig. 4).
Accessories:
Reducer 1/2" 3/8" Art.No. 11289
Reducer 1/2" 3/4" Art.No. 11290
Cooling water inlet (1):
Shorten the Nyflex hose to the optimum length, connect it
to the water connector, and secure it with a hose clamp.
Connect the other end of the hose to the cooling water
inlet nipple.
Cooling water outlet (2):
Shorten the silicone hose [9/6 mm] to the optimum length
and connect it to the cooling water oulet nipple (OUT
nipple). Direct the open end into the drain.
Check
The cooling water must flow through the cooling unit from
the bottom to the top.
Make sure that the hose drains freely. No kinks! No airtraps
in the hose!
Fig. 4: Standard sleeve nut (premounted)
Fig. 5: K-314 rear
햲햳

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BÜCHI Distillation Unit K-314 4 Putting into operation
Fig. 7: Connection supply tanks
4.4 Drain hose (3)
Make sure that the hose drains freely. No kinks! No airtraps
in the hose!
4.5 Connection of the supply tanks
• Connect the Nyflex hose to the flow-through tube
• Unscrew the small tank cap and stick it on the flow-
through tube
• Insert the flow-through tube with the tank cap on into
the tank until it reaches the stop
• Tighten the tank cap
• Connect the hose from the water tank to the K-314
(H2O nipple)
• Connect the hose from the sodium hydroxide tank to
the K-314 (NaOH nipple
• Fix the hose nozzle in place on the large tank cap.
The supply tanks must not be any higher than the unit
itself, nor any lower than 1 meter below it.
ca. 456
026660
026058
004113
026411
Fig. 6: Drain hose arrangement

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BÜCHI Distillation Unit K-314
5 Operation
5 Operation
Fig. 8: Arrangement and designation of the control and display elements
5.1 Control elements
햲Main switch
햳Pressure switch for adding the sodium hydroxide
solution
햴Steam tap
햵Digestion tube
햶Rubber bung with PTFE hose
햷Sample tube holder
햸Distillate outlet tube with PTFE hose
햹Receiver plate
햺Drip tray
햻Protective door
햽Connection nipple for cooling water inlet hose (IN)
햾Connection nipple for cooling water outlet hose (OUT)
햿Connection nipple for sodium hydroxide solution
(NaOH)
헀Connection nipple for water (H2O)
헁Connection nipple for drain
헂Mains connector with 2 fuses 20x5,10 AT
5.2 Control elements and their function
I / O After switching on the distillation unit, it takes
about 90 seconds before the unit is ready for
operation.
Before switching on, check that the supply tanks
and/or the hoses are filled with reagents.
NaOH Sodium hydroxide adding switch.
The alkali is dosed in as long as the switch is
pressed.
Steam Steam on / off.
Switching the distillation on and off manually.
Fig. 10: Control elements and their function
Fig. 9: Arrangement and designation of the connection nipples
햴
햳
햲
햷
햶
햵
햺
햻
햹
햸
햿
헀
헂헁햽햾
I/O
NaOH
Steam

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BÜCHI Distillation Unit K-314 5 Operation
5.3 Start-up checklist
The first time that the distillation unit is started up, there is
a penetrating odor. This smell, however, is of no importance.
It occurs when the heater pipe and the isolation become
warm. No overheating of the steam generator is possible.
5.4 Supply tanks
Fill the supply tanks. This can be done, for example, using
a bent funnel (Item No. 16662) or a footpump. The reagents
are forwarded within the K-314 unit by suction.
To ensure optimum long-time operation, the steam generator
must only be operated on distillated or deionized water!
Advantages:
1. No cleaning of the steam generator is necessary
2. The blank values can be kept under control.
Never supply the steam generator from a building distilled
water distribution pipe!
5.5 Rubber bung and PTFE hose
Check that the rubber bung and the PTFE hose are still properly
fitted, especially after they have been subjected to stresses
during transport or otherwise.
Mounting instruction:
If the PTFE hose has become loose, hold it with a piece of
sandpaper and refit it without kinking.