Elementary Fire Engineering Handbook 4th Edn – The Institution Of Fire Engineers

2-54 (c) Cooling systems for vehicle mounted pumps Because a fire appliance has to use its engine whilst stationary, its normal closed circuit cooling system, which also indirectly cools the automatic gearbox, is especially augmented by making use of water from the fire pump. Figure 19.15 shows, in schematic form, the general layout of an appliance cooling system. A supplementary heat exchanger, adjacent to the gearbox coolant heat exchanger, is fitted to ensure the correct working temperature when the vehicle is stationary and the fire pump is in use.

Water is taken from the delivery side of the pump, passed through the supplementary heat exchanger and returned to the suction side of the pump. This supply from the pump can also be used to cool the oil in the power take off. The water is routed firstly to the power take off and then to the supplementary heat exchanger before returning to the pump. Figure 19.15 General layout of a closed circuit appliance cooling system.

(Engine coolant in orange. Hydraulic oil in green. Fresh water in blue). As part of their pumping capacity, all fire and rescue services have pumps that can be manhandled into position (Figure 19.16). These are usually carried on appliances and are especially useful in areas where vehicles cannot get to water supplies. All have carrying frames and depending on their weight, can be transported by two or four personnel.

Most are driven by intemal combustion engines, although a few are electrically powered. Figure 19.16 Typicalportable pump (Godiva) Specifications for these pumps vary considerably with typical performances ranging from 250 |/min at 3.8 bar to booster pumps capable of delivering 2300 |/min at 7 bar. Electrically powered pumps used in the fire and rescue service are generally of low capacity and are usually employed for pumping out where other types of pump are not suitable eg in basements where it is difficult to disperse exhaust fumes.

The pump shown diagramatically at Figure 19.17 weighs only 17kg and operates from a 110 volt generator supply. it can pump from a submerged depth of 20m and provides a maximum output of 550 I/min. It can pump water down to a level of 2mm. The pump can also be used to provide a firefighting jet in excess of 10m at maximum output for such purposes as firefighting at sea.

As with all electrically driven appliances involving water, electrical integrity is vital and firefighters should be careful to ensure that safety instructions for use and testing are carried out correctly.

This is the fourth edition of this handbook, which has been compiled primarily to assist those studying for the Institution’s initial vocational qualifications where candidates are required to demonstrate their knowledge and understanding of elementary fire science, operations and fire safety. The handbook will also be of value to those undertaking apprenticeship programmes, induction training and some specialist roles. However, it is hoped that for whatever purpose the material is used, it will act as a stimulus to further study and understanding of this ever developing discipline.

The revised and extended contents are based largely upon standards and practices adopted in the UK, although it is recognised that these may vary in other countries around the world. Whilst much of the material has been extracted from The Stationery Office (TSO) publications under the terms of the UK Open Government Licence, | would like to acknowledge the valuable assistance given by my colleagues in the Institution in reviewing and revising the material for the publication, as well as members of the National Operational Guidance Programme, the Fire Service College, the British Automatic Sprinkler Association, Godiva Ltd.

and a number of other fire equipment manufacturers. George Almond CBE, OStJ, DL, MSc, FIFireE (Life), FCIPD Editor The Institution of Fire Engineers 2017 IFE Acknowledgement The Chief Executive and the Board of the IFE acknowledge with immense gratitude the enormous and invaluable contribution made by George Almond in developing and updating the content of this key reference book for individuals in the fire sector.

This book has provided a significant leaming resource for individuals around the world for well over a decade this new edition enhances and updates this vital material. Amended and published in 2017 by the Institution of Fire Engineers Copyright © IFE ISBN 978-0-903345-23-1 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the written permission of the IFE.

This is a short excerpt from the opening of “” by Unknown, quoted for review and introduction purposes. All rights belong to the copyright holders.

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