prEN 17451

Fixed firefighting systems - Automatic sprinkler systems - Design, assembly, installation and commissioning of pump sets

This document specifies design, assembly, installation and commissioning requirements for pump sets for use in sprinkler systems conforming to EN 12845. Where applicable, it can also be used in other water based fixed firefighting systems, including hydrants and hose reels.

Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Projektierung, Zusammenstellung, Montage und Inbetriebnahme von Pumpenaggregaten

Dieses Dokument legt die Zusammenstellung von Bauteilen zur Herstellung eines Pumpenaggregats fest, welche den Leistungsanforderungen und Eigenschaften für festgelegte Wassermengen entsprechend der Projektierung, Zusammenstellung, Montage und Inbetriebnahme der wesentlichen Feuerlösch Pumpen-aggregate mit Dieselmotor  und Elektroantrieb, die in ortsfesten Brandbekämpfungsanlagen nach EN 12845, CEN/TS 14816 und EN 16925 verwendet werden, entsprechen.
Dieses Dokument ist auch bei Feuerlösch Pumpenaggregaten für Feuerlöschhydranten und  schlauch-haspeln anwendbar, sofern diese in der Spezifikation der Wasserversorgung ortsfester Brandbekämpfungsanlagen enthalten sind.

Installations fixes de lutte contre l’incendie - Systèmes d’extinction automatique de type sprinkleur - Conception, assemblage, installation et mise en service des groupes motopompes

Le présent document spécifie l’assemblage d’éléments pour produire un groupe motopompe qui satisfait aux exigences de performance et aux caractéristiques pour les sources d’eau spécifiées, conformément à la conception, à l’assemblage, à l’installation et à la mise en service des principaux groupes motopompes diesel et électriques utilisés dans les installations fixes de lutte contre l’incendie conformes à l’EN 12845, à la CEN/TS 14816 et à l’EN 16925.
Le présent document s’applique également aux groupes motopompes de lutte contre l’incendie pour bouches d’incendie et robinets d’incendie armés s’ils sont inclus dans la spécification des sources d’eau fixes de lutte contre l’incendie.

Vgrajene naprave za gašenje - Avtomatski sprinklerski sistemi - Projektiranje, montaža, vgradnja in preverjanje črpalk

General Information

• Status: Not Published
• Publication Date: 06-Apr-2022
• ICS: 13.220.20 - Fire protection
• Technical Committee: CEN/TC 191 - Fixed firefighting systems
• Drafting Committee: CEN/TC 191/WG 5 - Sprinkler systems
• Current Stage: 4098 - Decision to abandon - Enquiry
• Start Date: 25-May-2022
• Completion Date: 14-Apr-2025
• Ref Project: oSIST prEN 17451:2022 - Fixed firefighting systems — Automatic sprinkler systems — Design, assembly, installation and commissioning of pump sets

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2022
Vgrajene naprave za gašenje - Avtomatski sprinklerski sistemi - Projektiranje,
montaža, vgradnja in preverjanje črpalk
Fixed firefighting systems — Automatic sprinkler systems — Design, assembly,
installation and commissioning of pump sets
Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Projektierung,
Zusammenstellung, Montage und Inbetriebnahme von Pumpenaggregaten
Installations fixes de lutte contre l’incendie - Systèmes d’extinction automatique de type
sprinkleur - Conception, assemblage, installation et mise en service des groupes
motopompes
Ta slovenski standard je istoveten z: prEN 17451
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2022
ICS 13.220.20
English Version
Fixed firefighting systems - Automatic sprinkler systems -
Design, assembly, installation and commissioning of pump
sets
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen - Automatische
d'extinction automatique de type sprinkleur - Sprinkleranlagen - Projektierung, Zusammenstellung,
Conception, assemblage, installation et mise en service Montage und Inbetriebnahme von Pumpenaggregaten
des groupes motopompes
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 191.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17451:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, symbols and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Symbols and abbreviated terms . 9
4 Performance of pump set . 9
4.1 General design principles . 9
4.2 Components . 10
4.3 Cooling and by-pass flow . 10
4.4 Fuel tank design . 11
4.5 Fuel, lubricating oil and coolant quality . 11
4.6 Speed of rotation . 11
5 Couplings. 12
5.1 Pump coupling and mounting . 12
5.2 Pump coupling and mounting (submersible pump) . 12
5.3 Coupling selection . 12
5.4 Coupling installation and alignment . 13
6 Baseplate or mounting frame . 13
6.1 General requirements for pump set installation and fixing considerations . 13
6.2 Load transfer – Vibration . 14
7 Pump set control . 14
7.1 Pump set control panels . 14
7.2 Pump set controller operational requirements . 15
7.3 Electrical pump set operation . 17
7.4 Monitoring of diesel pump driven operations . 18
8 Electrical drivers . 21
8.1 General. 21
8.2 Motor sizing – environmental conditions . 21
9 Diesel drivers . 21
9.1 General. 21
9.2 Power . 21
9.3 Diesel driver sizing . 22
9.4 Motor torque . 22
9.5 Diesel engine equipped with electronic fuel management control (ECM) . 23
9.6 Cooling system . 23
9.7 Exhaust system . 25
9.8 Starting mechanism . 25
9.9 Pump set engine supplier pre-dispatch testing of diesel engine . 26
10 Handover, installation and commissioning . 27
10.1 General. 27
10.2 Pre-commissioning tests . 27
10.3 Documentation . 28
10.4 Installers’ pre-commissioning checks . 30
10.5 Diesel set commissioning . 30
10.6 Electrical set commissioning . 31
11 Maintenance programme . 31
Annex A (informative) Pump set installation and fixing considerations; examples . 32
Annex B (informative) Information for designers, subject matter experts, and to assist
evaluation by authorities . 34
B.1 General . 34
B.2 Information about electrical pump controllers. 34
B.3 Industrial practice and design hints . 34
B.3.1 Intent of the short circuit protection as given in IEC 62091 . 34
B.3.1.1 General . 34
B.3.1.2 Starting modes as given in IEC 62091 . 34
B.3.1.2.1 General . 34
B.3.1.2.2 Full voltage starting mode – DOL (direct on line) . 34
B.3.1.2.3 Reduced voltage starting mode. 35
B.3.1.3 Most common reduced voltage starting means – star-delta . 35
B.4 Information about controllers for diesel engine driven fire pumps . 37
B.5 Information about flexible fire pump couplings and flexible connecting shafts for fire
protection service . 37
B.6 Information about diesel engine drives . 37
B.7 Information about electrical motors for fire pumps . 37
Annex C (informative) Examples of fire pump sets with its H(Q) performance . 38
C.1 General . 38
C.2 Pump Set Performance Output . 38
Annex D (informative) Typical examples of pump set coupling arrangements. 40
Bibliography . 41

European foreword
This document (prEN 17451:2022) has been prepared by Technical Committee CEN/TC 191 “Fixed
firefighting systems”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document is related to the following European standards:
CEN/TS 14816, Fixed firefighting systems - Water spray systems - Design, installation and maintenance;
CEN/TS 17551, Fixed firefighting systems — Automatic sprinkler systems — Guidance for earthquake
bracing;
EN 671 (all parts), Fixed firefighting systems - Hose systems;
EN 12094 (all parts), Fixed firefighting systems - Components for gas extinguishing systems;
EN 12101 (all parts), Smoke and heat control systems;
EN 12259 (all parts), Fixed firefighting systems - Components for sprinkler and water spray systems;
EN 12416 (all parts), Fixed firefighting systems - Powder systems;
EN 12845 (all parts), Fixed firefighting systems — Automatic sprinkler systems;
EN 13565 (all parts), Fixed firefighting systems - Foam systems;
EN 14972 (all parts), Fixed firefighting systems - Water mist systems;
Introduction
This document covers:
• the design and assembly of the pump set in accordance to the requirements of EN 12845 (all parts);
• identification of essential pump set components;
• the performance characteristics for components used within a pump set;
• performance testing requirements for diesel and electric driven pump sets;
• site testing, commissioning and handover;
• documentation.
Figure 1 identifies the typical pump set components covered by this standard.

Key
1 pump 6 pressure loss detection
2 coupling 7 pump set control panel
3 fuel for diesel 8 frame
4 driver 9 test system
5 wiring 10 auxiliary items : exhaust and cooling pipe
Figure 1 — Example of a typical pump set assembly for a diesel driven unit
1 Scope
This document specifies design, assembly, installation and commissioning requirements for pump sets
for use in sprinkler systems conforming to EN 12845 (all parts).
Where applicable, this standard can also be used for pump sets for other water based fixed firefighting
systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 12259-5:2002, Fixed firefighting systems - Components for sprinkler and water spray systems - Part 5:
Water flow detectors
prEN 12259-12:—, Fixed firefighting systems — Components for sprinkler and water spray systems — Part
12: Pumps
prEN 12845 (all parts), Fixed firefighting systems — Automatic sprinkler systems
EN 50342-1, Lead-acid starter batteries - Part 1: General requirements and methods of test
EN 50342-2, Lead-acid starter batteries — Part 2: Dimensions of batteries and marking of terminals
EN 60529:1992+A2:2013, Degrees of protection provided by enclosures (IP Code)
EN 60623, Secondary cells and batteries containing alkaline or other non-acid electrolytes - Vented nickel-
cadmium prismatic rechargeable single cells
EN IEC 60034-1, Rotating electrical machines — Part 1: Rating and performance
EN IEC 60947-1, Low-voltage switchgear and controlgear - Part 1: General rules
EN IEC 60947-3, Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units
EN IEC 60947-4-1:2019, Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-
starters - Electromechanical contactors and motor-starters
ISO 281, Rolling bearings — Dynamic load ratings and rating life
ISO 3046-1, Reciprocating internal combustion engines — Performance — Part 1: Declarations of power,
fuel and lubricating oil consumptions, and test methods — Additional requirements for engines for general
use
Under preparation. Stage at the time of publication: prEN 12259-12:2022
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 12845 (all parts) and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
assembly
design, production and testing of the pump set
3.1.2
installation
mounting and commissioning of the pump set in accordance with the pump set manufacturer’s
installation manual and procedures
3.1.3
maintenance
work performed to keep pump sets operable including repairs where required
3.1.4
pump set
assembled machine which is intended to supply water to automatic sprinkler, water spray and wet riser
systems, comprising at least a pump, electric motor or diesel engine, control panel, partial wiring loom,
drive coupling, mounting frame, baseplate and where required fuel tank
3.1.5
pump set installer
entity who is responsible for integrating the fire pump set into the sprinkler system in accordance with
the pump set manufacturer installation manual and procedures
3.1.6
pump set manufacturer
entity responsible for the design, assembly and build of the pump set
3.1.7
fail-safe elastomeric coupling
claw coupling
flexible coupling
integrated unit which provides power transmission, damping and flexibility from the driver to the pump,
designed so that the wear or failure of the elastomeric components of the coupling does not interrupt the
transmission of full torque from the driver to the pump
3.1.8
universal drive shaft
gimbal coupling
integrated unit which provides power transmission and flexibility from diesel engines or electric motors
to fire pumps that supply water to fire protection systems
3.1.9
rigid coupling
component without flexibility which provides power transmission from diesel engines or electric motors
to fire pumps that supply water to fire protection systems
3.1.10
all elastomeric coupling
plastic coupling
coupling that relies solely on an elastomeric material for power transmission
3.1.11
electric motor service factor
design margin to account for higher torque loadings which can be encountered under certain operating
conditions
3.1.12
coupling safety factor
safety margin specified by coupling manufacturers to address uncertainties in design
NOTE 1 to entry: See 5.2.
NOTE 2 to entry: The abbreviation for coupling safety factor is SFk.
3.1.13
authority
organizations responsible in the jurisdiction of use for accepting fire protection systems, equipment and
procedures
EXAMPLE Fire and building control authorities, fire insurers, local water authority or other appropriate
public authorities.
3.1.14
coupling
device to transmit torque and power from the driver to the pump
3.1.15
pressure sensor
element which generates an electrical signal that is transmitted to the pump set control panel according
to the pressure at the point where it is hydraulically connected
3.1.16
spacer coupling
cylindrical shaped piece introduced between the pump shaft coupling hub and motor shaft coupling hub,
giving enough space to remove the pump mechanical seal when doing maintenance, without moving
either the pump body or the driver
3.2 Symbols and abbreviated terms
For the purposes of this document, the following symbols and abbreviated terms apply.
L basic rating life time by which ten percent of a population of a product will have failed (see
ISO 281 rolling bearings)
ECM electronic fuel management control
EMC electromagnetic compatibility
EMF electromagnetic fields
FLC full load current
FLT full load torque
IFN numerical value of the fuel stop power taken as the maximum IFN value in
accordance to ISO 3046-1 for the driver, expressed in kilowatt
LRC locked rotor current
NPSHr net positive suction head required
NPSHa net positive suction head available
Pdm power distribution module
SFk coupling safety factor
VFD variable frequency drive
IP ingress protection, degree of protection rating as per EN 60529 classifications
4 Performance of pump set
4.1 General design principles
The design details covered in this clause address the general principles which shall be considered for all
pump set designs covered by this document. The design of pump set shall be based on the following
information provided to the pump set manufacturer:
— pressure-flow demand characteristics (including any required design margins);
— maximum possible suction pressure at pump suction flange;
— NPSHa at low water level in the water storage tank measured at the pump suction flange at the
maximum possible demand flow including 1 m safety margin;
— duration of operation (e.g. for fuel tank sizing; see 4.4);
— driver type (electric or diesel);
— applicable fixed firefighting system design specification: EN 12845 (all parts);
— hazard classification according to EN 12845 (all parts);
— water quality (potable, sea or filtered) description as defined in EN 12845 (all parts);
— voltage available;
— current available;
— starting method;
— type of earthing system;
— altitude of the installation;
— climatic zone with temperature and humidity;
— earthquake classification area.
4.2 Components
4.2.1 Connections
All service interface connection requirements (e.g. water, air, power or signal) shall be provided as part
of the installation instructions to enable the correct installation of the pump set on-site. The connections
shall be easily accessible and located in accordance with EN 12845 (all parts).
Pipes shall be supported independently of the pump.
4.2.2 Pumps and pump driver sizing
Pumps shall be in accordance with EN 12259-12 and shall be driven either by electric motors or diesel
engines, capable of providing at least the power required to comply with the following, plus the safety
margin as described for electrical motors and diesel engines respectively in Clause 8 and 9:
a) for pumps with non-overloading power characteristic curves, the maximum power required at the
peak of the power curve; or,
b) for pumps with rising power characteristic curves, the maximum power for any conditions of pump
load, from zero flow to a flow corresponding to a pump NPSHr equal to 16 m or maximum suction
static head plus 11 m, whichever is greater.
NOTE 16 m was derived from atmospheric pressure (9,98 m atmospheric) plus 6 m (equals 16 m NPSHa),
ignoring frictional losses. Typical tank height, at the time the requirement was written, was considered to be 6 m.
The 11 m was later added to cater for higher suction pressure scenarios (e.g. 5 bar inlet pressure) to ensure the
drive was also sized correctly in that scenario.
4.3 Cooling and by-pass flow
Arrangements, such as by-pass flows, shall be made to ensure a continuous flow of water through the
pump sufficient to prevent overheating when it is operating against a closed valve (this minimum
required flow rate is determined by requirements of prEN 12259-12:2022, 4.2).
The by-pass system can also be required to maintain the operational temperature of the diesel drivers.
Any additional flow requirements above that required by EN 12259-12, shall be specified by the pump
set manufacturer and shall also be included in the total cooling flow requirement.
Any cooling system pressure regulating devices shall be provided by the pump set manufacturer.
The by-pass flow shall be taken into account in the fixed firefighting system hydraulic calculation and
pump selection. This additional flow shall be provided in addition to the fixed firefighting system flow
figures.
Cooling water shall be taken from the sprinkler system water supply. The complete by-pass system may
or may not be supplied as a component of the pump set, as parts of the by-pass system may be part of the
wider system pipework installation in a manner similar to the supply of electrical cabling.
4.4 Fuel tank design
The fuel tank capacity shall be sufficient to enable the engine to run on full load, in the most unfavourable
atmospheric and environmental conditions, for the required period of duty. Minimum period of duty
values, are:
• 3 h for LH;
• 4 h for OH / FH1 to FH2;
• 6 h for HHP and HHS / FH3 to FH 5 or HHS1 to HHS 5.
These may be increased if required by the client specification. The design, installation and maintenance
of the fuel and fluid systems shall be fully compliant with the local safety and environmental
requirements.
The fuel tank shall be of welded steel. Where there is more than one engine, there shall be a separate fuel
tank and fuel feed pipe for each one.
The fuel tank shall be fixed at a higher level than the engine’s fuel pump to ensure a positive head, but not
directly above the engine. Where the tank cannot be installed on the same baseplate or mounting frame
as the pump set unit the fuel lines shall be kept to a minimum length, and installation parameters (e.g.
minimum and maximum height of tank relative to pump set) shall be specified by the pump set
manufacturer.
The fuel tank shall have a fuel level gauge and communicate with the pump set control panel to enable
low fuel level alarms. Where required, specification fuel leak monitoring functionality shall be provided.
Any valves in fuel feed pipe between the fuel tank and the engine shall be sited on or near the fuel tank.
They shall not be located on or near the engine. They shall have an indicator and be locked in the open
position and electrically monitored. Fuel feed pipe joints shall not be soldered. Metallic pipes and steel
hoses shall be used for fuel lines.
The feed pipe shall be situated at least 20 mm above the bottom of the fuel tank. A drain valve of at least
DN 20 diameter shall be fitted to the base of the tank.
The pump set manufacturer shall provide suitable connection to allow the fuel tank vent to be terminated
outside the building.
4.5 Fuel, lubricating oil and coolant quality
The diesel fire pump driver manufacturer shall specify the required fuel (e.g. as specified in EN 590),
lubricating oil and coolant characteristics.
Fuel tanks shall be marked with required fuel grade.
Fuel oils used in diesel engines can be subject to detrimental effects from prolonged storage. Therefore,
it is recommended that a proper maintenance schedule is put into place to ensure the fuel remains
suitable for engine operation, efficiency, and longevity.
4.6 Speed of rotation
-1
The nominal driver speed shall not exceed 3 600 min .
5 Couplings
5.1 Pump coupling and mounting
Examples of typical coupling types are defined in 3.1 (e.g., plastic coupling, universal drive shaft gimbal
coupling, fail-safe elastomeric coupling, claw coupling, flexible coupling, spacer coupling, etc) and
arrangements can be found in Annex D.
This clause does not apply to submersible pumps.
Couplings shall be sized to meet the required rated power levels for reliable operation, despite being idle
for extended periods.
The coupling between the driver and the pump of pump sets shall be of a type which ensures that either
can be removed independently and in such a way that pump internals can be inspected or replaced
without affecting suction or discharge piping and without requiring the impeller to be withdrawn, and
without removing the driver or pump body.
The pump and driver shall be coupled, and the coupling shall be rated for the maximum torque of the
driver. It shall be designed so that if any elastomeric element used in the coupling to absorb vibration
should fail, the pump shall continue to be driven under all operating conditions, except that a right-angle
gear drive can be used for vertical shaft pumps.
Maximum permissible driver size for close coupled end suction pumps shall be 55 kW. Diesel driven
pump sets shall not be close coupled.
Pumps and drivers shall be fitted with a ‘fail safe’ coupling. It shall be one of the following types:
• rigid coupling; or
• fail-safe elastomeric coupling; or
• universal drive shaft.
Couplings made of only elastomer material shall not be used; where couplings incorporating elastomeric
materials are used, they shall be fail-safe.
EXAMPLE Couplings of this type typically include pin and bushing, jaw, disc, drive shaft or steel-grid-type
couplings where the drive components are metallic.
The pump set shall be designed and assembled in such a way that there shall be ready access for checking
the alignment of couplings when the installation is completed.
5.2 Pump coupling and mounting (submersible pump)
Submersible pumps shall use a rigid coupling. The rigid coupling shall be made from stainless steel
suitable for the environmental conditions of operation.
Coupling for submersible motors up to “8 inches” (as per the classifications of NEMA MG1) shall be in
accordance with NEMA MG1 motor shaft specifications (NEMA MG1-2016, Part 18, Figure 18-18, 18-19,
18-20 for motor shaft shape).
Coupling for submersible motors greater than “8 inches” shall be with key seat according to the shaft key
of the motor.
Rigid couplings used for submersible pumps shall be suitable to assure adequate support for upward or
downward thrusts, created by the submersible pump in starting or running condition.
5.3 Coupling selection
The coupling shall be designed for adverse environmental locations.
Driveshaft bearings shall have a minimum basic life rating of L as determined by the methods of ISO 281,
for at least 5 000 h operating at the maximum load condition of the pump set.
EXAMPLE No more than 10 % of the population may have been calculated to have failed after no less than
5 000 h operating at the maximum load condition of the pump set.
NOTE Attention is drawn to EN ISO 14120, see [10].
The sizing of the coupling shall be based on the rating of the driver not the pump, taking account of the
maximum available torque provided by the driver as specified by the manufacturer.
The selection of the coupling shall withstand the torque between pump and driver. The torque shall be
calculated using the formula:
Power ×1000
τ × SFk
Rotational speed
2 ×π ×
where
τ
is the numerical value of the torque between pump and driver, expressed
in newton metre;
rotational speed is the numerical value of the speed, expressed in 1/min;
Power is the numerical value of the fuel stop power taken as the maximum IFN
value in accordance to ISO 3046-1 for the driver, expressed in kilowatt;
SFk is the numerical value of the coupling safety factor.
SFk values shall be provided by the coupling manufacturer; the pump set manufacturer shall select a
suitably rated coupling. The SFk shall not be less than specified in table 1.
Table 1 — Minimum SFk values
Electric Diesel engine (5 or Diesel engine
Pump gear box
motor fewer cylinders) (6 cylinder)
Pump without right-angle gear box 1,25 1,75 1,25
Pump with right-angle gear box 1,75 2,5 2,0
5.4 Coupling installation and alignment
Couplings shall be installed according to the coupling manufacturers’ instructions. Alignment of the
coupling and shaft shall be within the tolerances defined by supplier.
The preliminary integration (including alignment) of the pump, coupling and driver at the pump set
manufacturer’s premises shall be in accordance with the component suppliers’ specifications.
Final alignment shall be undertaken once the pump set has been fully installed on-site (see Clause 10).
This alignment shall be checked to be in accordance with the pump set manufacturer’s specification after
the pump baseplate or mounting frame is installed, bolted down and all pipework connected.
6 Baseplate or mounting frame
6.1 General requirements for pump set installation and fixing considerations
The mounting arrangements of the pump can require the use of baseplates or mounting frames. Where
baseplates or mounting frames are required the design of the mounting shall be of sufficient strength and
=
mass to withstand the static and dynamic forces imposed by the pump set. The primary characteristics
to be considered include:
• dimensions;
• alignment;
• weight loading;
• ability to withstand vibration;
• transport;
• fixing details to meet the requirements of the pump set manufacturer’s instructions.
Annex A provides guidance on some affixing scenarios.
NOTE Attention is drawn to any applicable National requirements. E.g. for structural integrity, strength and
seismic performance. See also standards EN 1090 (all parts) and EN 12845 (all parts).
6.2 Load transfer – Vibration
For the load transfer the forces on the key components such as the pump set control panel, couplings,
connections etc. shall be taken into account and also the influence of these units on the vibration and load
transfer. Examples of baseplates or mounting frames design approaches can be seen in Figure A.1.
7 Pump set control
7.1 Pump set control panels
Each pump set shall be monitored and controlled by a dedicated pump set control panel. Except in the
case of submersible pumps, the pump set control panel shall be in the same compartment as the pump
set and be installed as close to the pump set as possible.
Functions of the main fire pump set control panel(s) should not be shared with other equipment (e.g.
compressors, jockey pumps or trace-heating).
In countries where the practice of sharing control panels with other equipment is covered by additional
national requirements from the authorities, the control panel of the main fire pump unit may be shared
with other equipment (e.g. compressors, jockey pumps, or heat tracing). In this case, a main power cable
shall be provided, from which the individual systems shall be protected by their own fuses after the main
fuse. The cables and lines in the control cabinet to the auxiliary units shall be designed to be earth-fault
and short-circuit proof or dimensioned in such a way that they are protected against overload and short-
circuit by the main fuse.
The pump set control panels, associated electrical connections and current-carrying parts should be
installed on the pump set baseplate or mounting frame or be supplied for wall or floor mounting. In all
cases all components and connections shall be mounted at least 200 mm above the base of the
compartment floor.
The pump set control panel shall be easily accessible and clearly visible from the pump set unit.
The pump set control panel shall be at least IP 54 rated according to EN 60529:1992+A2:2013.
The pump set control panel shall be mounted such that it is not located in areas subject to:
• temperature, humidity, and rates of change which fall outside the specified operating range for the
controller unit;
• mechanical vibration which could damage the pump set control panel;
• any external sources of EMC interference which could interfere with the operation of the pump set.
The pump set control panel casing shall be constructed from metal and finished with a corrosion resistant
coating (such a powder coating or paint finishes). The pump set control panel shall be fitted with tamper
proof access control (e.g. a locking device) to prevent unauthorised access or use. The pump set control
panel shall be marked in accordance with the labelling requirements of EN 12845 (all parts).
In the case of submersible pumps, a plate with its characteristics shall be affixed to the pump set control
panel. The submersible pump set control panel can be situated in another compartment remote from the
motor and pump.
7.2 Pump set controller operational requirements
7.2.1 General
The activation of the pump set shall arise from an externally supplied signal in accordance with EN 12845
(all parts). Each pump set control panel shall:
a) start the motor automatically on receiving an activation signal, which may take the form of either:
1) a signal from a normally closed contact (from one or two of two independent devices), or;
2) short circuit and open circuit monitoring shall be provided for all other actuation configurations
(including normally open devices).
b) start the motor on manual actuation;
c) stop the motor by manual actuation only.
An identified fault alarm condition on the pump set control panel shall not prevent the operation of the
pump set or lead to a false start.
As an exception to 7.2.1 c), the engine can stop automatically as per the requirements of 9.5, if it is an
ECM engine.
7.2.2 Pump start pressure detection
7.2.2.1 General
Two pressure sensors shall be installed for each pump set. Each sensor shall be independently capable of
detecting a pressure loss requiring the pump to start. The pressure sensors shall be connected to the
pump set control panel via two separate lines.
7.2.2.2 Pressure sensors
7.2.2.2.1 Introduction
The following types of devices shall be used:
a) pressure switches, with a signal to close or open the electrical circuit when a pre-set pressure is
reached; and/or,
b) pressure transducer transmitting an electrical signal as a function of pressure.
7.2.2.2.2 Pressure switches
Pressure switches used in pump sets shall be electrically compatible with the pump set controllers and
meet the following minimum requirements:
a) be a corrosive resistant type, equivalent to EN 12259-5:2002, 4.7 and Annex G;
b) operational pressure range: 0 to 1,5 times the maximum working pressure;
c) trigger sensitivity ± 0,25 bar;
d) enclosure rating IP 65 in accordance with EN 60529.
7.2.2.2.3 Pressure transducers
Pressure transducers used in pump sets shall be electrically compatible with the pump set controllers
and meet the minimum following requirements:
a) be a corrosive resistant type, equivalent to EN 12259-5:2002, 4.7 and Annex G;
b) operational pressure range: 0 to 1,5 times the maximum working pressure;
c) accuracy ± 0,5 % of full operational range;
d) enclosure rating IP 65 in accordance with EN 60529.
7.2.2.3 Pressure sensor configuration
The pressure sensors shall be configured as follows:
a) 2 pressure switches connected in series with contacts normally closed above the start pressure,
opening in case of pressure loss;
b) 2 pressure switches connected in parallel with contacts normally open above the start pressure,
closing in case of pressure loss;
c) 1 pressure switch and 1 pressure transducer:
1) the pressure switch is configured with contact normally closed above the start pressure, opening
in case of loss of pressure;
2) the transducer detects loss of pressure;
d) 2 pressure transducers. Each transducer detecting the loss of pressure;
7.2.2.4 Pressure monitoring and fault reporting
The pressure detection system shall be monitored by the pump set control panel for the following fault
conditions:
a) short circuit occurs in any of the pressure sensor signal lines or equipment;
b) open circuit occurs in any of the pressure sensor signal lines or equipment;
c) signal out of range occurs in the transducer, including sensor disconnected;
d) difference in pressure readings across the two transducers exceeds 1bar.
7.3 Electrical pump set operation
7.3.1 Electrical pump controller and short circuit interruption devices
7.3.1.1 General
Electrical pump controllers can be integrated into the electrical system either as switch gear or as control
gear or a control cabinet. Pump sets in accordance to this standard shall be one of the following types:
• Type F – circuit protection provided by Fuses (see 7.3.1.1)
• Type CB - circuit protection provided by Circuit Breakers (see 7.3.1.1)
• Type VFD - circuit protection provided by Fuses or Circuit Breakers and Variable Frequency Drive
incorporated (see 7.3.1.1)
7.3.1.2 Basic electrical requirement of pump controller for electrical pump
All components of the electrical pump controller: switches, contactors, short circuit protection devices
and cables, shall be sized for at least 115 % of motor full load current of the electrical fire pump set.
Semiconductor (VFD) controllers shall be sized for to drive a motor one size up of the kW rating of the
motor full load current of the electrical fire pump set.
Starting mechanism shall be capable of a minimum of six start sequences per hour.
The short circuit protection device may be a fuse (Pump set type F) or a circuit breaker (Pump set type
CB).
For VFD pump sets, circuit protection shall be as per the VFD manufacturer’s requirements.
Only VFD module pump sets with “Fire Mode” shall be used.
VFD pump sets will initiate and operate in fire mode; they will attempt to reach operating speed and
continue to run at the correct operating speed regardless of any fault condition reported at the VFD
module.
For a typical squirrel cage motor, the protection device shall allow minimum 720 % of motor full load
current (FLC) or the inrush current of the motor as declared by the motor manufacturer for 5 seconds.
In this application the design intent is that motors shall safely run to destruction to preserve fire
protection function for as long as possible, rather than to preserve the equipment.
NOTE 1 National electrical codes usually require a coordinated electrical upstream protection for electrical
sprinkler pump controllers. A short circuit, load and selectivity study is normally considered a necessary part of the
design and installation documentation.
The utilization classification of contactors shall be in accordance with EN IEC 60947-4-1 depending on
the starting method.
Isolation switches shall be sized for AC-23 service in accordan
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