
BÜCHI Recirculating Chiller B-740
3
Contents
Contents
B-740 Instructions 96691
1 Scope of delivery 2
2 Safety 3
3 Function 5
4 Putting into operation 6
5 Operation 7
6 Maintenance 8
7 Taking out of operation 10
8 Appendix 11
en, Version D (14 pages) Order no.
Read through these operating instructions
thoroughly before you use the BÜCHI
Recirculating Chiller B-740. Keep these
instructions in the immediate area of the
apparatus so that they can be referred to
at any time.
Chapter 2 contains important safety tips.
Knowledge of these is indispensable for the
safe operation of the apparatus.
Subject to technical alterations without prior notice. No part
of these operating instructions may be reproduced in any
form whatsoever or processed, reproduced or disseminated
using electronic or optical systems without the written permission of Büchi Labortechnik AG. All rights reserved.
Copyright © Büchi Labortechnik AG, 1997

BÜCHI Recirculating Chiller B-740
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Figure 1: Total view B-740
1 Scope of delivery
Description
Apparatus versions: Order no.
Büchi Recirculating Chiller B-740 230 V
Model 800 Watt 37740
Model 1400 Watt 37741
Model 2500 Watt 40300
Table 1: Scope of delivery
Enclosed parts:
1 Instructions:
Deutsch 96690
English 96691
French 96692
Italian 96693
Spanish 96694
1 Mains cable PNE, 2,5 m
Type CH 10010
Type Schuko 10016
Type GB 17835
Type AUS 17836
Type USA 10020
1 Packaging cpl.
Table 2: Enclosed parts
1 Scope of delivery
Figure 2: B-740, 2500W
Optional accessories:
Distribution head with taps 37742
Table 3: Optinal accessories

BÜCHI Recirculating Chiller B-740
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2 2 Safety
2 Safety
The apparatus is constructed in accordance with stateof-the art technology and recognized technical safety
regulations.
Nevertheless risks and danger can arise from the apparatus:
• if the apparatus is not used according to instructions.
• if the apparatus is operated by insufciently trained
personnel.
2.1 Symbols
Stop
Information on the dangers which can lead to great damage
to property or to severe or life-threatening injuries.
Warning
Information on the dangers which can lead to damage to
one’s health or to damage to property.
Please note
Information which indicates technical requirements. Noncompliance can lead to disturbance, uneconomical operation or production losses.
2.2 Demands on the operator
The apparatus may only be used by persons who have an
overview of the dangers which can develop when operating
the apparatus.
2.3 Regulation use
The Recirculating Chiller is conceived and built as a piece
of laboratory equipment. Its regulation use is the cooling
of closed cycles (e.g. rotary evaporators, reaction vessels
...).
The regulation use of the Recirculating Chiller also includes
its care.