END USER MANUAL - Danfoss · 2020. 2. 26. · END USER MANUAL OPERATION AND MAINTENANCE OF HIGH PRESSURE WATER MIST PUMP UNIT REVISION 4, MAY 2016 PAGE 7 / 48 1 Introduction 1.1 Safety

END USER MANUAL SEM-SAFE® HIGH-PRESSURE WATER MIST PUMP UNIT

REVISION 4, MAY 2016

End User Manual

High-Pressure Water Mist Pump Unit

Revision 4, May 2016

Copyright 2016 by Danfoss Semco A/S.

All rights reserved. No part of this manual may be reproduced, distributed, or transmitted in any form or by

any means, including photocopying, recording, or other electronic or mechanical methods, without the prior

written permission of Danfoss Semco. For permission request, please contact us:

Danfoss Semco A/S Middelfartvej 9, 5000 Odense C, Denmark

Tel.: +45 74 88 78 00

Fax: +45 74 88 78 01

E-mail: [email protected]

Web: www.danfoss-semco.com

mailto:[email protected]

http://www.danfoss-semco.com/

END USER MANUAL OPERATION AND MAINTENANCE OF HIGH PRESSURE WATER MIST PUMP UNIT


PAGE 3 / 48

Foreword

This End User Manual provides basic understanding as well as guidance for operation and

maintenance of the SEM-SAFE® High-Pressure Water Mist Pump Unit manufactured by Danfoss

Semco A/S. This manual is prepared for system owners and users of the SEM-SAFE® High-

Pressure Water Mist Pump Unit. If you encounter any problems with the system, please contact

Danfoss Semco A/S Service department (email: [email protected]).

PAGE 4 / 48



Table of Contents

Introduction ................................................................................................................................. 7 1

Safety instructions for SEM-SAFE® pump unit .................................................................. 7 1.1

General Safety instructions .............................................................................................. 7 1.1.1

Workplace Safety ............................................................................................................. 7 1.1.2

Electrical Safety ............................................................................................................... 7 1.1.3

Personal Safety ................................................................................................................ 8 1.1.4

Personal Safety Equipment .............................................................................................. 8 1.1.5

Copyright, Confidentiality Statement and Trademark ........................................................ 8 1.2

Liability ............................................................................................................................... 9 1.3

Health and safety ................................................................................................................. 9 1.4

Reservation clause ............................................................................................................. 10 1.5

System description .................................................................................................................... 11 2

General system description ............................................................................................... 11 2.1

General description of Wet Pipe Water Mist System ........................................................ 11 2.2

General description of Dry Pipe Water Mist System ........................................................ 11 2.3

General description of Pre-action Water Mist System ...................................................... 11 2.4

General description of Deluge Water Mist System ........................................................... 12 2.5

Pump unit component description ............................................................................................ 12 3

Pump unit with unit tank ................................................................................................... 12 3.1

Pump unit with supply manifold (without unit tank) ........................................................ 13 3.2

High-pressure pumps ......................................................................................................... 14 3.3

END USER MANUAL OPERATION AND MAINTENANCE OF HIGH PRESSURE WATER MIST PUMP UNIT REVISION 4, MAY 2016

PAGE 5 / 48

Electric motors .................................................................................................................. 15 3.4

Pilot pump (optional in Land and Marine applications) .................................................... 15 3.5

Unit without pilot pump (marine systems) ........................................................................ 15 3.6

Unit tank ............................................................................................................................ 15 3.7

Supply manifold ................................................................................................................ 16 3.8

High-pressure manifold ..................................................................................................... 17 3.9

Valves ............................................................................................................................... 18 3.10

Pressure controlling and monitoring devices .................................................................... 18 3.11

Filter system ...................................................................................................................... 19 3.12

Emergency back-up system ............................................................................................... 20 3.13

Standard Unit Control Panel .............................................................................................. 21 3.14

Land application ............................................................................................................ 21 3.14.1

Marine application ......................................................................................................... 25 3.14.2

VdS Unit Control Panel ................................................................................................. 29 3.14.3

FM Global Unit Control Panel....................................................................................... 32 3.14.4

Pump unit operation .................................................................................................................. 34 4

Pump unit activation .......................................................................................................... 34 4.1

Increasing discharge capacity in a fire situation................................................................ 34 4.2

Shut-down of pump unit after activation (fire suppression) .............................................. 34 4.3

Reestablishment of the SEM-SAFE® system after starting up .......................................... 35 4.4

Pump unit maintenance ............................................................................................................. 36 5

Maintenance of land units according to CEA 4001 .......................................................... 36 5.1

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Maintenance according to FM Global ............................................................................... 39 5.2

Maintenance according to VdS Schadenverhütung ........................................................... 42 5.3

Maintenance of marine units according to MSC.1/Circ. 1432 .......................................... 45 5.4


PAGE 7 / 48

Introduction 1

Safety instructions for SEM-SAFE® pump unit 1.1

The SEM-SAFE®

system is a high-pressure water mist system and consists of nozzles, pump unit,

section valves, piping system, etc. The SEM-SAFE®

High-Pressure Water Mist Pump Unit and

system operates under high pressure and high voltage.

Care must be taken when operating the SEM-SAFE® High-Pressure Water Mist Pump Unit.

Installation, test, commissioning and service of the system is only to be carried out by appropriately

trained, competent personnel. It must be ensured that all relevant procedures are followed to the

satisfaction of the authority having jurisdiction, defined as organization, office, or individual

responsible for approving equipment, materials, an installation or a procedure.

General Safety instructions 1.1.1

WARNING

Read all safety instructions and instructions.

If the safety instructions and the instructions are not followed, there is a risk of electric shock and /

or serious injury.

Save all warnings and instructions for future use.

Workplace Safety 1.1.2

a) Make sure to keep the area around the pump unit free and clean. Disorder in the work area

increases the risk of accidents.

b) Make sure that other people and especially children are kept away from the pump unit when

the pump unit is operating.

Electrical Safety 1.1.3

a) The SEM-SAFE® pump unit is always connected to high voltage during standby and

operation.

b) The door on the Unit Control Panel should never be opened by anyone other than educated /

trained personnel as there is an increased risk of electric shock.

c) The main switch should always be switched off during replacement of electrical

components. If the main switch is not switched off there will be an increased risk of

electrical shock.

PAGE 8 / 48



IMPORTANT. When the work is finished on the pump unit, the main switch

must be turned on again. If the main switch is not turned on, the SEM-SAFE® pump unit

will not activate if a fire occurs in the protected areas.

Personal Safety 1.1.4

a) Always use personal safety equipment (See chapter 1.1.5 Personal Safety Equipment).

Safety equipment will reduce personal injuries.

b) When replacing mechanical or electrical components on the pump unit, the main switch

should always be switched off. If this is not done, there will be an increased risk of injury.

IMPORTANT. When the work is finished on the pump unit, the main switch

must be turned on again. If the main switch is not turned on, the SEM-SAFE® pump unit

will not activate if a fire occurs in the protected areas.

Personal Safety Equipment 1.1.5

a) Persons staying in the area, during operation of the SEM-SAFE® pump unit must wear

hearing protection.

b) Persons who work with service and maintenance of SEM-SAFE® pump unit must wear hand

protection.

c) Persons who work with service and maintenance of SEM-SAFE®

pump unit must wear

safety shoes.

Copyright, Confidentiality Statement and Trademark 1.2

This manual is the property of Danfoss Semco A/S, is confidential information and shall only be

used for carrying out operation and maintenance of the SEM-SAFE® High-Pressure Water Mist

Pump Unit. The manual shall not, in whole or in part, be reproduced, copied, disclosed or used as

the basis for manufacture, marketing or sale without the prior written permission of Danfoss Semco

A/S.


PAGE 9 / 48

The content of this manual reflects the state of the art and experience at the time of issuing,

however, Danfoss Semco A/S will constantly improve systems, procedures and instructions.

Consequently, Danfoss Semco A/S will reserve the right to revise and improve this manual without

prior notification.

All trademarks in this manual are property of Danfoss Semco A/S. Danfoss Semco A/S logotype is

a registered trademark and is property of Danfoss Semco A/S. All rights reserved.

Liability 1.3

This manual is prepared for system owners, operators and occupants (hereinafter referred to as End

User) of the SEM-SAFE®

High-Pressure Water Mist Pump Unit that will perform periodic

scheduled test and maintenance of the pump unit.Test and maintenance must be done according to

this manual, which specifies daily, weekly, monthly and annual check procedures. These tasks shall

be performed only by personnel who have developed competence through for example training and

experience. The pump unit must be serviced by an approved installer at least once per year.

The SEM-SAFE® High-Pressure Water Mist Pump Unit is intended for use only in accordance with

the instructions in this manual. Any use which is not consistent with the content of this manual is

considered incorrect. Operation and maintenance of the SEM-SAFE®

High-Pressure Water Mist

Pump Unit shall be carried out in accordance with this manual. It is the responsibility of the End User

to ensure that requirements in this manual comply with applicable legislation in the area where the

SEM-SAFE® High-Pressure Water Mist Pump Unit is used.

The End User shall ensure that the fire risk has not changed after the system and thus the SEM-

SAFE® High-Pressure Water Mist Pump Unit was installed and the system / application became

operational. The End User shall also ensure that all necessary information is available and if any doubt

exists, it is the responsibility of the End User to verify with Danfoss Semco A/S.

Danfoss Semco A/S cannot be held responsible for SEM-SAFE® High-Pressure Water Mist Pump

Units that have not been operated, maintained or used in accordance with this manual.

Health and safety 1.4

Danfoss Semco A/S health and safety procedures and environmental policies according to OHSAS

18001, ISO 14001 and rules and regulations on the local territory shall be strictly followed.

Furthermore, it is the End User’s responsibility to ensure that territorial legislation and on-site

safety regulations are followed during operation and maintenance of the SEM-SAFE® High-

Pressure Water Mist Pump Unit.

PAGE 10 / 48



Reservation clause 1.5

Danfoss Semco A/S can accept no responsibility for possible errors in catalogues, brochures and

other printed material.

Danfoss Semco A/S reserves the right to alter its products without notice. This also applies to

products already on order provided that such alterations can be made without subsequent changes

being necessary in specifications already agreed.


PAGE 11 / 48

System description 2

General system description 2.1

The SEM SAFE® High-Pressure Water Mist System consists of nozzles, pipe work, section valves

and pump unit and can be classified as one of the following four different types of systems:

Wet Pipe Water Mist System

Dry Pipe Water Mist System

Pre-action Water Mist System

Deluge Water Mist System

The SEM SAFE® High-Pressure Water Mist Pump Unit can serve any combination of these four

systems.

General description of Wet Pipe Water Mist System 2.2

The wet system is a system using automatic nozzles attached to a piping system permanently filled

with water at maintained standby pressure. The system is activated when a thermal-sensitive glass

bulb in the automatic nozzle bursts, which is caused by an increase of the temperature at the nozzles

during fire. This creates a pressure drop in the system which activates the SEM SAFE® High-

Pressure Water Mist Pump Unit that immediately delivers water under high pressure to activated

water mist nozzle(s) located in the area of fire.

General description of Dry Pipe Water Mist System 2.3

Dry pipe water mist system is a system using automatic nozzles attached to piping system

containing air under standby pressure. Protected sections are separated from the supply sources by

dry pipe section valve(s). The system is activated when a thermal-sensitive glass bulb in the

automatic nozzle bursts, which is caused by an increase of the temperature at the nozzles during

fire. It allows the water pressure to open a dry pipe section valve. The water then flows into the

piping system and discharges through any activated water mist nozzles located in the area of fire.

General description of Pre-action Water Mist System 2.4

A pre-action water mist system is used where special precautions are required to avoid the water

mist being released unexpectedly in the protected rooms. It is using automatic nozzles attached to a

piping system containing air under standby pressure, with a supplemental detection system installed

in the same area at the water mist nozzles. The actuation of the detection system opens a valve that

allows water to flow into the piping system and discharge through any activated water mist nozzles.

PAGE 12 / 48



General description of Deluge Water Mist System 2.5

A deluge water mist system uses open (nonautomatic) nozzles attached to a piping system that is

connected to a high-pressure pump unit through a section valve which is opened by means of a

detection system installed in the same area as the water mist nozzles or manually. When the section

valve opens, water flows into the piping system and discharges through all water mist nozzles

attached to the system.

Pump unit component description 3

The SEM-SAFE®

High-Pressure Water Mist Pump Unit is constructed in a modular design. It

consists of 1 to 8 electrically driven high-pressure pumps supplying a high-pressure manifold,

control panel (UCP), pilot pump (to maintain pressure in the system in stand-by mode) and pressure

and flow controlling devices. All assemblies are mounted on a common skid frame.

Pump unit with unit tank 3.1

During operation of the SEM-SAFE®

High-Pressure Water Mist Pump Unit with unit tank, the water

from the unit tank is pressed from the pump through a non-return valve and into a common high-

pressure manifold. From there, water is discharged into sections of the protected area and reaches

water mist nozzles. The system pressure is regulated by a pressure relief valve, which is also a

dedicated safety valve, capable of bypassing the total capacity of the high-pressure pumps (when a

section valve or main valve is closed). The excess water from the valve is returned to the unit tank.

The picture below shows an example of a pump unit with the unit tank and water filter attached to

it. A detailed description of components is presented in the following chapters.


PAGE 13 / 48

Pump unit with supply manifold (without unit tank) 3.2

During operation of a SEM-SAFE®

High-Pressure Water Mist Pump Unit with supply manifold

instead of unit tank, the water under low pressure (min. 1-3 bar) is delivered from an outside reservoir

into the supply manifold on the SEM-SAFE®

High-Pressure Water Mist Pump Unit. Delivery is

performed either with the help of a booster pump between the reservoir and the supply manifold or

with the reservoir tank placed on a higher level than the SEM-SAFE®

High-Pressure Water Mist

Pump Unit, ensuring positive water flow.

From the supply manifold, through the hoses, water is discharged into high-pressure pumps, which

are raising the water pressure to system pressure. Then, water under high pressure reaches the water

mist nozzles in protected areas.

The picture below shows an example of a SEM-SAFE®

High-Pressure Water Mist Pump Unit with

the supply manifold. A detailed description of components is presented in the following chapters.

Figure 1. SEM-SAFE® High-Pressure Water Mist Pump Unit with unit tank

PAGE 14 / 48



High-pressure pumps 3.3

The high-pressure pumps are stainless steel, water-lubricated

positive displacement pumps with multiple pistons mounted in a

rotating cylinder, which reduce ripple and pulsation in the

discharge water stream. A typical SEM-SAFE®

High-Pressure

Water Mist Pump Unit consists of 1 to 8 electrically driven,

stainless-steel high-pressure pumps.

During SEM-SAFE®

High-Pressure Water Mist Pump Unit

activation, high-pressure pumps are pumping water from the water

supply to the manifold, discharging it to sections of the protected

area.

Figure 3. High-pressure pump

with electric motor

Figure 2. SEM-SAFE® High-Pressure Water Mist Pump Unit with supply manifold


PAGE 15 / 48

Electric motors 3.4

SEM-SAFE®

High-Pressure Water Mist Pump Unit consists of 1 to 8 electric motors, each one

attached to a high-pressure pump.

Pilot pump (optional in Land and Marine applications) 3.5

The function of the pilot pump is to establish and maintain a

pilot/standby pressure in the pipe system. The pilot pump will not

activate the SEM-SAFE®

High-Pressure Water Mist Pump Unit. The

pilot pressure is set to a maximum 14 bar and minimum 10 bar and is

monitored by the system pressure transmitter.

Unit without pilot pump (marine systems) 3.6

A SEM-SAFE®

High-Pressure Water Mist Pump Unit without pilot pump is started by signal from a

separate Fire Detection Panel, or manually from the Valve Operation Panel (VOP), Local Call

Points or from the Unit Control Panel (UCP) by operating the pump start button. These systems are

mainly dry pipe Local Application or Total Flooding Systems.

Unit tank 3.7

The unit tank is made of stainless steel grade AISI 316, the capacity of the tank is adapted to the

discharge capacity of the SEM-SAFE®

High-Pressure Water Mist Pump Unit. As standard, the unit

tank capacities are 820l, but for large capacity units the tank capacity is 1200l. There is also

available a version of unit tank with capacity of 300l for special applications.)

One basic function of the unit tank is to establish an air gap between the supply source (public water

supply) and the water contained in the water mist system (backflow protection according to

standard DS/EN 1717). Its other function is supplying clean filtered water to the high-pressure

pumps and receiving surplus water from the pressure relief valve. Tank and pump skid must have

earth grounding.

Figure 4. Pilot pump

PAGE 16 / 48



Example of unit tank automatic filling facilities for Land application:

Figure 5. Example of unit tank

Supply manifold 3.8

The supply manifold delivers the water under low pressure (min. 1-3 bar) from the outside reservoir

into the SEM-SAFE®

High-Pressure Water Mist Pump Unit. Delivery is performed either with the

help of a booster pump between the reservoir and the supply manifold or with the reservoir tank

placed on a higher level than the pump unit, ensuring positive water flow.

Alarm Level Function

L5: Alarm at too high a

level

Alarm shown in display, system failure relay is de-energized and

high level relay is energized.

L4: Stop filling level De-energize filling solenoid valve.

L3: Tank filling level Energize filling solenoid valve.

L2: Alarm at too low a level

in tank

Activates alarm for low level in tank, shown in display, system

failure relay is de-energized and low level relay is energized.

L1: Low-low level in tank Activates alarm in display, system failure relay is de-energized, all

high pressure pumps stopped.

Automatic pump restart at rising level in tank < 35cm


PAGE 17 / 48

High-pressure manifold 3.9

The high-pressure manifold collects and discharges water pumped from the pilot pump (wet system)

or high-pressure pumps through the main valve into the water mist distribution pipe system. The

main components attached to the manifold are described in the following chapters.

Figure 6. Example of supply manifold

Figure 7. Example of high-pressure manifold

PAGE 18 / 48



Valves 3.10

Main valve

The main valve is used for isolating the high-pressure pump system

from the rest of pipe system during service and maintenance.

Test valve

The test valve is used for the following operations and pump start procedures during maintenance

and service:

Relieving pressure on the high-pressure manifold

during maintenance and service operations

Test of pilot pump start and stop when pressure falls

High-pressure pump start when pressure falls, by 6 bar

pressure transmitter, by simulating system pressure

drop when the main valve is in the closed position

High-pressure start on falling pressure, 6 bar pressure

switch (back-up start) by simulating system pressure

drop when the main valve is in the closed position

Relieve pressure during manual start of high-pressure

pump(s)

Pressure controlling and monitoring devices 3.11

Pressure relief valve

The purpose of the pressure relief valve is to maintain the

system pressure at the desired pressure level at any given

discharge and to avoid over pressurization. It is done by

relieving surplus pumping capacity back to the unit tank and

thereby keeping the system pressure constant at the pre-set

level.

The standard SEM-SAFE®

High-Pressure Water Mist Pump

Unit is provided with one pressure relief valve installed in each

Figure 8. Main valve

Figure 9. Test valve

Figure 10. Example of

pressure relief valve


PAGE 19 / 48

line between the high-pressure manifold and the high-pressure pump discharge gate. For VdS, FM

Global, and marine SEM-SAFE®

High-Pressure Water Mist Pump Units, one single large capacity

pressure relief valve is used for the complete unit. The pressure relief valve is pre-set at the factory

acceptance test, and this setting should not be altered. Any service or repair of the valve should be

carried out by a service engineer.

System pressure transmitter

The system pressure transmitter has the following functions:

Displaying the actual system pressure in the alarm

display on the Unit Control Panel (UCP)

Start of the pilot pump or re-charge of pressure level at

system pressure of ca. <10bar

Stop of the pilot pump at system pressure of ca. >14bar

(Land applications) or ca. >12bar (Marine applications)

Initiating the high-pressure pump start sequence at

pressure level of less than 6bar (Land application) or

less than 10bar for more than 10 seconds (Marine

application)

The system pressure transmitter is monitored for wire break and short circuit. Wire break in the

cabling will not cause pump start.

Pressure switch

The 6 bar pressure switch is back-up for the system pressure transmitter used in Land applications

in order to secure monitoring of the system pressure, in case the system pressure transmitter has a

malfunction. The 6 bar pressure switch will activate the high-pressure pump starting sequence if

pressure is below 6 bar. A leak alarm is initiated if the pilot pump starts more than 2 times within 5

minutes

Filter system 3.12

In order to avoid contamination, clogging of water mist nozzles and malfunction of pumps and

valves, the extinguishing water has to be filtered before it is delivered into the SEM-SAFE®

High-

Pressure Water Mist Pump Unit. On pump units with a unit tank, the filter is mounted before the

water supply reaches the tank. On pump units with a supply manifold, the filter is mounted before

the water supply reaches the supply manifold, under condition that it is going through the booster

pump beforehand. If there is no booster pump, the filter must be placed before the reservoir tank.

Figure 11. Pressure transmitter

PAGE 20 / 48



The required grade of filtration is 10µmeter. The ΔP across the filter cartridge should be limited to

1.5bar. Minimum water supply pressure through the filter system should not be less than 2.5bar and

max. 5.4bar.

Emergency back-up system 3.13

In case of loss of power from the main supply and pressure drop under 5bar, the emergency back-up

system (cylinder unit) shall be capable of supplying the required pressure to the most remote nozzle in

the system, until emergency power is available for the pumping system, or not less than 1 minute of

operation. The capacity of the emergency back-up system shall contain the amount of water (H2O) to

cover the largest section of nozzles for 1

minute at the design pressure.

Nitrogen (N2) is used as prime mover of the

water for immediate operation in case of

pressure drop and power failure in a fire

situation. The (N2) is supplied in standard gas

cylinders at a filling pressure of about 200bar.

A pressure regulating device is mounted on the

(N2) cylinder bank in order to maintain the

system pressure at its pre-set value.

Figure 12. Emergency back-up system – N2 cylinders

Figure 12. Filters


PAGE 21 / 48

Standard Unit Control Panel 3.14

The Unit Control Panel constantly monitors the function of the SEM-SAFE®

High-Pressure Water

Mist Pump Unit. It controls power and water supply for failure as well as monitors alarm and

system status. It informs of any failure and which parts of the unit are working during activation of

the system.

Land application 3.14.1

Figure 13. Example of Unit Control Panel for Land applications

A functional description of buttons, lamps and switches placed on the unit control panel is presented

below. Please note that this is a description of unit control panel including all options, and your

SEM-SAFE® High-Pressure Water Mist Pump Unit might not contain all of them.

PAGE 22 / 48



Button/Lamp/Switch Description

Amp. meter Displays the value of electric current (ampere) used by the Unit Control

Panel.

Lamp test

Press this button if you need to check if all lamps on the Unit Control

Panel are functioning properly. When pressed, all lamps will turn on. If

they do not, you should check the bulbs and wiring of lamps.

System (unit) start

Button for manual start of the SEM-SAFE® High-Pressure Water Mist

Pump Unit. By pressing the button, the first pump on the unit will start.

Then the unit will automatically control the pressure level and turn on

additional high-pressure pumps if required.

System error light

and system reset error

switch

Lamp which indicates that an error/failure occurred in the SEM-SAFE®

High-Pressure Water Mist Pump Unit. When it is ON, a description of

the failure appears on the Alarm Display. After the error is solved, the

system may be reset by using the system reset error switch.

HP pump 1-8 running

Lamp which turns on when a specific high-pressure pump on the SEM-

SAFE® High-Pressure Water Mist Pump Unit is running. There is a

separate lamp for each high-pressure pump.

Power supply main

switch

Switch used to turn on and off the power supply to the Unit Control

Panel.

Emergency stop push

button

Push button for emergency stop of the SEM-SAFE® High-Pressure

Water Mist Pump Unit.

Volt meter Displays the value of electric potential (Volt) of the Unit Control Panel.

Volt meter selector

switch Switch for manual selection of the electric potential value.

Buzzer Audio alarm in case of error/failure.

Mute buzzer Button for manual mute of buzzer.

HP pump 1-8

emergency start key

switch

Emergency switch for each pump in case of error/failure on the SEM-

SAFE® High-Pressure Water Mist Pump Unit. Each switch can be turned

on with the key placed in the bag inside the cabinet.

Alarm and status

display

Description of alarm that occurred. It appears when the System error

light is on. Please see the list of alarms below.


PAGE 23 / 48

System ready

Lamp is turned on when the SEM-SAFE® High-Pressure Water Mist

Pump Unit is ready to run. It indicates normal stand-by operation when

the supply is turned on.

Akku on/off Switch for turning on and off the 24V battery supply (UPS) placed in the

cabinet. By default, the Akku switch is turned on.

Supply on Power supply for the SEM-SAFE

® High-Pressure Water Mist Pump Unit

is turned on.

Booster pump

Optional button, for when there is a need to raise inlet pressure.

Normally it is a function performed automatically, with no need for the

button.

Release section Buttons for manual opening of section valves in the system. Each valve

has its own button.

Close section Switches for manual closing of section valves in the system. Each valve

has its own button.

Flow SILO display Display showing which section valves are open. Each valve is

represented by one light.

Auto / Auto off

Switch which is turned on by default, indicating that the SEM-SAFE®

High-Pressure Water Mist Pump Unit should start automatically. If

required, it can be switched off.

Alarm display on UCP

In ready mode, without any alarm, the display shows the unit tank level (for the SEM-SAFE®

High-

Pressure Water Mist Pump Unit with unit tank) and actual pressure on the manifold (pilot pressure).

In alarm mode, the display shows the latest alarm raised. When the alarm is rectified, this alarm is

reset by pressing the reset button on the Unit Control Panel. The next unsolved alarm will appear on

the display until solved. For pressure and level indication in the alarm condition, press and hold the

reset push button.

PAGE 24 / 48



Figure 14. Alarm display

Examples of alarms in the Alarm display on the Unit Control Panel are listed below.

Alarms

Power supply phase error Control circuit error on HP 1-8

HP 1-8 phase error Main or test valve not fully open or closed

Pilot pump phase error System failure repeat alarm

24V DC pilot voltage supply error High level in unit tank

Low level in unit tank System activated

Emergency stop activated Wire break error on system pressure transmitter,

pressure switch, main and test valve

Note:

Refer to the DIOMA (Design Installation Operation Maintenance Approval) manual for your

system received from Danfoss Semco A/S to see a complete list of alarms, their meaning and ways

to solve the problem.


PAGE 25 / 48

Marine application 3.14.2

Figure 15. Example of Unit Control Panel for Marine applications

A functional description of buttons, lamps and switches placed on the unit control panel is presented

below. Please note that this is a description of unit control panel including all options, and your

SEM-SAFE® High-Pressure Water Mist Pump Unit might not contain all of them.


System ready

Lamp is turned on when the SEM-SAFE® High-Pressure Water Mist

Pump Unit is ready to run. It indicates normal stand-by operation

when supply is turned on.

Main power Button for manual start of main supply. Should be used if

lamp ‘System ready’ is not turned on.

Control power

Controlling if circuits in UCP are working properly. If lamp is on, it

means that control of circuits is turned on. If it is off, system is not

ready to run (System ready lamp is off).

PAGE 26 / 48



Supply switch board

Lamp which indicates that the SEM-SAFE® High-Pressure Water Mist

Pump Unit is connected to supply. Lamp should be turned on at all

times during operation.

Emergency supply

switchboard

Lamp which indicates that the SEM-SAFE® High-Pressure Water Mist

Pump Unit is connected to the emergency supply. Lamp should be

turned on at all times during operation.

System (unit) start

Button for manual start of the SEM-SAFE® High-Pressure Water Mist

Pump Unit. By pressing the button, the first pump on the unit will start.

Then the SEM-SAFE® High-Pressure Water Mist Pump Unit will

automatically control the pressure level and turn on additional high-

pressure pumps if required.

HP pumps 1-8 running

Lamps which turn on when a specific high-pressure pump on the SEM-

SAFE® High-Pressure Water Mist Pump Unit is running. There is a

separate lamp for each high-pressure pump.

Standby pump running Lamp which turns on when the standby high-pressure pump on the

SEM-SAFE® High-Pressure Water Mist Pump Unit is running.

Lock Used for locking main door of UCP.

System pressure

display

System pressure display shows the pressure level in the system and

controls the work of the pilot pump. It consists of 4 digits display and 2

relay indicators in a 14-segment LED display.

Emergency power Switch for manual start of emergency supply.

Fault from foam unit

(optional)

Indicates the failure in the SEM-SAFE® High-Pressure Water Mist

Pump Unit from the foam unit.

System stop Button for manual stop of the SEM-SAFE

® High-Pressure Water Mist

Pump Unit.

Release section Buttons for manual opening of section valves in the system. Each valve

has its own button.

Close section Switches for manual closing of section valves in the system. Each valve

has its own button.

Flow SILO display Display showing which actuator valves are open. Each valve is

represented by one light.


PAGE 27 / 48

Water filling Lamp indicating that the unit tank is being filled with water (in case of

too low a water level – please refer to unit tank alarms).

Lamp test

Press this button if you need to check if all lamps on the Unit Control

Panel are functioning properly. When pressed, all lamps will turn on. If

they do not, you should check the bulbs and wiring of lamps.

Emergency stop push

button

Push button for emergency stop of the SEM-SAFE® High-Pressure

Water Mist Pump Unit.

Alarm panel Displays failures which may occur. Please see below.

Hour meter

Displays for how many hours the SEM-SAFE® High-Pressure Water

Mist Pump Unit has been working (during operation or service).

Alarm panel on UCP

The alarm panel on the Unit Control Panel for marine application is equipped with 8 LED lamps

marked 1 to 8 which indicate the condition of alarm for individual functions and 2 lamps indicating

contact output. In ready mode with power on and no alarm initiated, LED lamps on the alarm panel

will light green which means that auxiliary voltage is connected and the processor is active.

When an alarm condition occurs, LED lamps for the particular function will flash with red light or,

only in the case of cable failure, with yellow light. Alarm indicators are reset using the “LAMP

RESET” push-button. If more than one alarm occurs, and the “LAMP RESET” push-button is not

activated, the first alarm LED lamp will flash ahead of others.

PAGE 28 / 48



Figure 16. Alarm panel

The following alarms are displayed on the alarm panel after a 1 to 10-second delay:

Alarms

1: PUMP FAULT 5: spare

2: EMERGENCY STOP activated 6: SYSTEM STARTED

3: LOW LOW LEVEL in unit tank 7: MAIN VALVE NOT OPEN

4: spare 8: opt FW PUMP FAULT

Note:





PAGE 29 / 48

VdS Unit Control Panel 3.14.3

Figure 17. Example of VdS Unit Control Panel

A Functional description of buttons, lamps and switches placed on the unit control panel is

presented below. Please note that this is a description of unit control panel including all options, and

your SEM-SAFE® High-Pressure Water Mist Pump Unit might not contain all of them.


Amp. meter Displays the value of electric current (ampere) used by the Unit

Control Panel.

Lamp test

Press this button if you need to check if all lamps on the Unit

Control Panel are functioning properly. When pressed, all lamps

will turn on. If they do not, you should check the bulbs and

wiring of lamps.

System ready

Lamp is turned on when the SEM-SAFE® High-Pressure Water

Mist Pump Unit is ready to run. It indicates normal stand-by

operation when supply is turned on.

PAGE 30 / 48



System error light and

system reset error switch

Lamp which indicates that an error/failure occurred in the SEM-

SAFE® High-Pressure Water Mist Pump Unit. When it is ON,

description of the failure appears on the Alarm Display. After the

error is solved, the system may be reset using the system reset

error switch.

HP pump 1-3 running lamp

Lamp which turns on when a specific high-pressure pump on the

SEM-SAFE® High-Pressure Water Mist Pump Unit is running.

There is a separate lamp for each high-pressure pump.

Main switch Turn on power supply

Pump 1-3 emergency start

key switch

Emergency switch for each pump in case of error/failure on

SEM-SAFE® High-Pressure Water Mist Pump Unit. Each switch

can be turned on with the key placed in the bag inside the

cabinet.

Volt meter Displays the value of electric potential (Volt) of Unit Control

Panel.

Volt meter selector switch Switch for manual selection of electric potential value.


Mute buzzer Button for manual mute of buzzer.

Start (unit) start

Button for manual start of the SEM-SAFE® High-Pressure Water

Mist Pump Unit. By pressing the button, the first pump on the

unit will start. Then the unit will automatically control the

pressure level and turn on additional high-pressure pumps if

required.

Akku on/off Switch turns on and off the 24V battery supply (UPS) placed in

the cabinet. By default, the Akku switch is turned on.

System pressure below 6

bar

Yellow lamp which turns on during normal operation when

pressure in the system drops below 6 bar and the high-pressure

pump starts working.

Disabled below 6 bar

Blue lamp which turns on during service of the SEM-SAFE®

High-Pressure Water Mist Pump Unit in order to let the service

technician know that automatic start of the high-pressure pump

after pressure drops below 6 bar is disabled.

HP pump 1-3 fault If the failure occurred on the high-pressure pump, the lamp turns

yellow.


PAGE 31 / 48

Emergency stop push

button

Push button for emergency stop of the SEM-SAFE® High-

Pressure Water Mist Pump Unit.

Alarm and status display Description of alarm that occurred. It appears when the System

error light is on. Please see the list of alarms below.

Alarm display on UCP

In ready mode without any alarm, the display shows the unit tank level (for SEM-SAFE®

High-

Pressure Water Mist Pump Unit with unit tank) and actual pressure on the manifold (pilot pressure).

In alarm mode, the display shows the latest alarm raised. When the alarm is rectified, this alarm is

reset using the reset button on the Unit Control Panel. The next unsolved alarm will appear on the

display until solved. For pressure and level indication in alarm condition, press and hold the reset

push button.

Figure 18. Alarm display

Examples of alarms in the Alarm display on the Unit Control Panel are listed below.

Alarms

Power supply phase error Control circuit error on HP 1-4

HP 1-4 phase error Main or test valve not fully open or closed

Pilot pump phase error System failure repeat alarm

24V DC pilot voltage supply error High level in unit tank

PAGE 32 / 48



Low level in unit tank System activated

Emergency stop activated Wire break error on system pressure transmitter,

pressure switch, main and test valve

Note:




FM Global Unit Control Panel 3.14.4

The FM Global SEM-SAFE® High-Pressure Water Mist Pump Unit is designed differently to all

other pump units produced by Danfoss Semco A/S. It has a separate Unit Control Panel for each

high-pressure pump. Please see example of the complete FM Global SEM-SAFE® High-Pressure

Water Mist Pump Unit below.

Figure 19. FM Global High-Pressure Pump Unit with 4 HP pumps


PAGE 33 / 48

Functional description of buttons, lamps and switches placed on the unit control panel is presented

below.

Figure 20. Example of an FM Global Unit Control Panel



Unit start Button for manual start of the unit.

Unit stop Button for manual stop of the unit.

Main switch Switch for turning on power supply

Emergency start handle Handle for emergency start of the unit

Alarm and status display Description of alarm that occurred.

PAGE 34 / 48



Pump unit operation 4

Pump unit activation 4.1

With the SEM-SAFE®

High-Pressure Water Mist Pump Unit in stand-by mode (pilot pressure

maintained at 10-14 bar), activation of one or more water mist nozzles causes a sharp pressure drop

in the system. The pressure drop and increasing water demand is monitored by the system pressure

transmitter which at pressure below 6 bar creates a start signal initiating the high-pressure pump’s

start sequence.

The system will not activate in the case of an error on the cable to the pressure transmitter. In case

of short circuit or wire break on the pressure transmitter, the back-up pressure switch initiates the

pump start sequence.

The high-pressure pump start sequence can be also initiated manually by pressing the “Pump start”

push button placed on the Unit Control Panel front. Then the sequence is initiated as for an automatic

start. The high-pressure pumps can also be individually started at the Unit Control Panel by operating

the dedicated key switch located in the Unit Control Panel front.

Increasing discharge capacity in a fire situation 4.2

Activation of more nozzles and thereby increasing water demand is monitored by the system

pressure transmitter. If system pressure drops below 100 bar for 5 sec., the next high-pressure pump

in the start sequence is started and is adding its capacity to the pump unit discharge capacity. The

same procedure is used for the remaining number of pumps in the start sequence until the design

capacity has been achieved.

If the pressure has been above 100 bar for more than 10 minutes, the last started high-pressure

pump is stopped automatically, but re-started again if the pressure is below 100 bar for 5 sec. The

first started high-pressure pump can only be stopped by activating the emergency stop push button.

Shut-down of pump unit after activation (fire suppression) 4.3

SEM-SAFE®

High-Pressure Water Mist Pump Unit will operate until it is stopped manually. Stop of

the pump unit after activation shall only be ordered by the responsible leader of the firefighting

team. The SEM-SAFE®

High-Pressure Water Mist Pump Unit should only be stopped by the direct

orders of the fire brigade commander.


PAGE 35 / 48

The high-pressure pumps are stopped by activation of the emergency stop push button, the zone

struck by fire shall be isolated at the section valve, and the pump system shall be re-established in

order to serve sections other than the section struck by fire.

Reestablishment of the SEM-SAFE® system after starting up 4.4

If the system has been activated, the following procedure must be followed to bring the system back to

the ready state.

1. The nozzle(s) which is/are released are to be changed. This is done after closing the section

valve for the section concerned.

2. After mounting new nozzles, the section where the release has taken place is to be pressure-

tested with operation pressure to secure that the system is tight. In practice, this is done by re-

opening the section valve for the section concerned and letting the high-pressure pumps, which

are still running, raise the pressure in the section. When the section concerned has been re-

pressurized, the section valve is closed again and the total system is de-pressurised by means of

the relieve button.

3. The section concerned is now the only one pressurised to operational pressure. Please observe

whether the pressure in this section is falling – this would indicate a leakage. If not, the section

is ready for stand-by operation. The replaced nozzles are checked for leakages. Finally, the

section valve is re-opened.

4. By a release of the system (i.e. all sections have been pressurized), in order to bring the system

back to normal operation procedure (stand-by function), the system is to be de-pressurized

using the “Relieve System” button.

The “Relieve System” button functions as follows:

1. All high-pressure pumps are stopped.

2. The by-pass valves on the pump unit and main risers are opened until the pressure drops to 12

bars.

3. System alarms are reset.

4. High-pressure pump stop is deactivated.

After this procedure, the system is back at stand-by function and ready to start up again should it be

necessary.

PAGE 36 / 48



In case it is necessary to get the system in stand-by position before this mentioned time period, it will

be possible, after having activated the “Relieve System” button, to manually activate the test valve

on the Pump Unit. The procedure will then only take a few minutes.

In case a new fire should start during the resetting period, please note that the system can

always be manually released by activating the “pump start” button on the Unit Control Panel

placed at the pump unit.

Pump unit maintenance 5

Maintenance of land units according to CEA 4001 5.1

To maintain operational readiness of the SEM-SAFE®

High-Pressure Water Mist Pump Unit,

regular inspections and repairs shall be carried out. This section describes the minimum measures to

be taken and the parties responsible for carrying them out.

If required by the authorities having jurisdiction, the user shall have required inspections carried out

under contract by the system installer or a similarly certified company.

Each routine of the schedule shall be carried out by a competent person who shall provide the user

with a signed, dated report of the inspection and advice of any rectification carried out or needed,

and advice of any external factors, which may have affected the result. The user of this manual must

ensure that periodical inspections are performed.

According to CEA 4001 standard, following routine maintenance procedures has to be carried out:

1. Weekly routine according to CEA4001 §18.3.2

2. Quarterly routine according to CEA4001 §18.4.2

3. Half yearly routine according to CEA4001 §18.4.3

4. Yearly routine according to CEA4001 §18.4.4

5. Three years and five years inspection according to CEA4001 §18.4.5 & §18.4.6

The main inspection tasks are listed below, but be aware that you need to follow the procedures

listed in the main manual DIOMA (Design Installation Operation Maintenance Approval manual)

for your system received from Danfoss Semco.

Each part of the weekly routine shall be carried out at intervals of not more than 7 days.


PAGE 37 / 48

The following shall be checked and recorded:

Weekly routine

1 The fill levels of water tanks (storage tanks, reduced capacity tanks, ground and elevated

tanks and break water tank).

2 System standby pressure.

3 Functionality of heating equipment (during heating period) in the water mist equipment

room, for wet pipe systems if installed etc.

4 Automatic pump starting test.

5 No errors indicated on the pump unit motor control panel.

6 No leakage from the pump unit.

7 The correct operational position of the main and test valves.

8 The alarm horn and flash light shall be operated for not less than 30 seconds.

9 Connection between the alarm switch and the ABA control station.

10 Connection from the the ABA control station to the fire brigade shall be checked. Note: The

procedure shall be agreed with the alarm signal recipient.

In addition to the weekly routine checks, the below mentioned checks and inspections shall be

carried out at intervals of not more than 13 weeks.

Quarterly routine

1 Stop valves All stop valves on the water mist pump unit shall be checked for

good working order, and re-established in the operational position.

2 Automatic filling of

unit tank

Check and confirm filling level and alarm levels

L5: Alarm at too high a level: alarm shown in display,

system failure relay de-energized and high level relay

energized.

L4: Stop filling level: de-energize filling solenoid valve.

L3: Tank filling level: energize filling solenoid valve.

L2: Alarm at too low a level in tank: Activates alarm for low

level in tank, shown in display, system failure relay is de-

energized and low level relay is energized.

L1: Low-low level in tank: Activates alarm in display,

system failure relay is de-energized, all high-pressure pumps

stopped.

PAGE 38 / 48



In addition to the quarterly routine checks, the below mentioned checks and inspections shall be

carried out at intervals of not more than 6 months.

Half-yearly inspection

1 Fire brigade and remote central

alarm check

Check continuity of cables and wires connections

between UCP and remote alarm central, raise actual

alarms from the UCP and acknowledge reception of the

alarms at the remote alarm central.

2 Raise the pump running signal, check that the alarm is received at the fire brigade.

In addition to the weekly routine checks, the below mentioned inspections shall be carried out at

intervals of not more than 12 months by a Danfoss Semco approved service company.

3 Electrical supplies

Change to alternative supply if any, run pump start sequence as in

weekly test. Confirm all functions and alarms.

Any secondary electrical supply from diesel generators shall be

checked for satisfactory operation.

4 Review of hazard

The effect of any changes of structure, occupancy, storage

configuration, heating, lighting, or equipment etc. of a building on

hazard classification or installation shall be identified in order to

that the appropriate modification may be carried out.

5 Replacement parts Replacement parts held as spare shall be checked for number and

condition.

6

Control of fire and

remote alarm

central

Check connection of cable and conduit between UCP and remote

alarm control panel, release actual alarms from UCP and confirm

receipt of alarms with remote control panel. Make “pump running”

signal and check that the alarm is received by the fire department.


PAGE 39 / 48

Yearly inspection

1 Automatic pump flow test

Each water supply pump in the installation shall be

tested at the full load condition (by means of the test line

connection coupled to the pump delivery branch

downstream of the outlet back pressure valve) and shall

provide the minimum system pressure and flow values

stated on the name plate.

2 Back up batteries for Logic

relay in UCP

Batteries supplying the logic relay in the unit control

panel shall be inspected and checked for capacity (24

VDC). At capacity below 80%, the batteries shall be

replaced.

3 Water inlet supply filters Check and inspect water inlet filters clean filter housing

and replace filter element if contaminated

4 Float valves on storage tanks Check and exercise all float valves for proper function

and corrosion, repair or replace as necessary

Maintenance according to FM Global 5.2

The system installer/supplier shall provide the operator with instructions on the control of the

system to be carried out. This includes action to be taken in respect of faults and operation of the

system, with particular mention of the procedures for emergency manual starting of SEM-SAFE®

High-Pressure Water Mist Pump Unit, and details of weekly control as described in the following

section.

In the case of installations without any extra restrictions or obligations set out in the building

permit:

Inspected by the relevant authority at least once a year.

Being subject to the conclusion of a servicing contract with an approved installer.

Being subject to appropriate organisational measures.

The daily and weekly controls may be adjusted accordingly and by agreement with the relevant

authority.

Daily controls shall be carried out on all weekdays.

PAGE 40 / 48



For systems where operational status is monitored automatically, daily controls are not necessary.

For monitored systems, the daily inspection can be deleted and the daily test carried out together

with the weekly routine that shall be carried out at intervals of not more than 7 days.

The following shall be checked and recorded:

Daily/weekly inspection

1 The fill level of the unit tank.

2 Unit standby pressure.

3 No errors indicated on the pump unit UCP.


5 Start the high-pressure pump unit by simulated pressure drop. Check the correct operational

position of unit’s main stop and test valves when inspection is finished.

In addition to the weekly programme, the following shall be controlled and recorded at intervals of

not more than 30 days:

Monthly Controls

1 Check condition of unit gauges (mechanical) and that normal system pressures are being

maintained.

2 Function control of refill equipment for unit tank.

3 Visual control of unit filters; clean or replace as necessary.

4 Conduct visual control of pipe work, nozzles and pipe hangers

In addition to the monthly programme, the following shall be controlled and recorded at intervals of

not more than 3 months:

Quarterly Controls

1 Carry out the weekly test program.

2 Test audible and visual alarm devices supplied from the unit.

3 Check all water flow alarm valves with regard to flow and alarm transmission to alarm panel

Each routine of the quarterly schedule shall be carried out by a competent person of the approved

installer who shall provide the operator with a signed and dated report of the inspection, advise any


PAGE 41 / 48

rectification carried out or needed, and advice of any external factors, which may have affected the

result. Any procedures stipulated by the system manufacturer shall be carried out in addition to this

program.

The following checks and inspections shall be made and recorded at intervals of not more than 6

months:

Half-yearly Servicing Routine by Danfoss Semco Approved Installer

1 Test operation of manual starting means (electrical system).

2 Check and test operation of safeties and alarms (electrical system).

3 Clean boxes, panels and cabinets.

4

Control of change over switch

between normal and emergency

supply

For UCP provided with power supply from more than

one source.

Normal supply and Emergency Power Supply.

The function of the automatic change-over switch.

Each routine of the half-yearly schedule shall be carried out by a competent person from Danfoss

Semco approved service company who shall provide the operator with a signed and dated report of

the inspection, advice of any rectification carried out or needed, and advice of any external factors,

which may have affected the results.

In addition to the weekly routine, the following checks and inspections shall be made and recorded

at intervals of not more than 12 months:

Yearly Servicing by Danfoss Semco Approved Installer

1 Valves and supply controls Mechanically moveable components on the unit shall be

checked for smooth movement.

2 Automatic pump flow test Automatic high-pressure pump unit flow test checks that

the pump unit capacity is according to type label.

3 Float valves Float valves in unit tank shall be checked for correct

function.

4 Strainers and filters Unit filters shall be inspected, cleaned or replaced as

necessary.

5 Back up batteries for Logic

relay in UCP

Batteries supplying the logic relay in the unit control

panel shall be inspected and checked for capacity (24

VDC). At capacity below 80%, the batteries shall be

replaced.

PAGE 42 / 48



Maintenance according to VdS Schadenverhütung 5.3

To maintain operational readiness of the SEM-SAFE®

High-Pressure Water Mist Pump Unit,

regular inspections and repairs shall be carried out. This section describes the minimum measures to

be taken and the parties responsible for carrying them out.

The operator shall appoint one responsible staff member (water mist warden) and one deputy to be

in charge of servicing and controlling the extinguishing system. They shall see to it that the

operational and maintenance instructions of the installer and any legal regulations are met.

The installer shall provide the operator with instructions on the control of the system to be carried

out. This includes action to be taken in respect of faults and operation of the system, with particular

mention of the procedures for emergency manual starting of the pump unit, and details of weekly

control as described in the section ”Weekly control”.

Note: In the case of installations without any extra restrictions or obligations set out in the building

permit:

Inspected by VdS at least once a year.

Being subject to the conclusion of a servicing contract with a VdS-approved installer.

Being subject to appropriate organisational measures.

Each routine of the schedule shall be carried out by a competent person who shall provide the user

with a signed, dated report of the inspection and advice of any rectification carried out or needed,

and advice of any external factors, which may have affected the result.

For systems where operational status is monitored automatically, daily controls are not necessary.

For monitored systems, the daily inspection can be deleted and the daily test carried out together

with the weekly routine that shall be carried out at intervals of not more than 7 days.

As the system is approved as a monitored system, the daily and weekly inspections have been

merged, the combined routine shall be carried out at intervals of not more than 7 days.


PAGE 43 / 48

Daily/Weekly routine

1 The fill levels of the unit tank.

2 System stand-by pressure.

3 Automatic pump starting test

4 No errors indicated on the pump unit motor control panel.


6 The correct operational positions of unit stop and test valves.

7

The audible and visual alarm shall be operated for not less than 30 seconds and

simultaneously the connection to the fire brigade or the permanently manned location shall

be checked.

Note: The procedure shall be agreed with the alarm signal recipient.


carried out and recorded at intervals of not more than 5 weeks.

Monthly routine

1 Visual control of unit supply filters.

2 Examine the unit filter system. Check for contamination, clean or replace as necessary.


carried out and recorded at intervals of not more than 13 weeks.

Quarterly routine

1 Electrical supplies Any secondary electrical supplies from diesel generators shall be

checked for satisfactory operation.

2 Stop valves Unit stop, test and drain valves shall be tested for good working

function, positioned in the right operation position and secured.


carried out by a VdS-approved installer at intervals of not more than 6 months.

PAGE 44 / 48



Each routine of the below listed items shall be carried out by a competent person of the VdS-

approved installer who shall provide the operator with a signed, dated report of the inspection and

advise of any rectification carried out or needed, and advise of any external factors, which may have

affected the results.

Half – yearly servicing routine by VdS– approved installer

1 Control of pump start

If in the event of a power supply failure an

electric supplied pump unit is supplied by an

emergency source of power, the automatic

change over shall be tested.

2 Check of float valves for unit tank filling Check the float valves for automatic tank

filling

In addition to the weekly routine checks the below mentioned checks and inspections shall be

carried out by VdS-approved installer at intervals of not more than 12 months.

Each routine of the below listed items shall be carried out by a competent person of the VdS-

approved installer who shall provide the operator with a signed, dated report of the inspection and

advise of any rectification carried out or needed, and advise of any external factors, which may have

affected the results.

Yearly servicing routine by VdS approved installer

1

Automatic high-

pressure pump

flow test

Each HP pump unit in the installation shall be tested at the full load

condition (by means of the test line connection coupled to the pump

delivery branch downstream of the outlet back pressure valve) and shall

provide the minimum system pressure and flow values stated on the

name plate.

Note: Appropriate allowances shall be made for pressure losses in the

supply pipe and valves between the source and the gauge at the

measuring point.

2 Check function of UCP

3 Check of alarm transmission from UCP to alarm recipient according to the alarm list

4

Back up batteries

for Logic relay in

UCP

Batteries supplying the logic relay in the unit control panel shall be

inspected and checked for capacity (24 VDC). At capacity below 80%,

the batteries shall be replaced.


PAGE 45 / 48

5 Float valves in

unit tank

Float valves supplying water the unit tank shall be checked for correct

function.

6 Filters and

strainers

Filters in the water supply to the unit shall be inspected and cleaned as

necessary.

Maintenance of marine units according to MSC.1/Circ. 1432 5.4

These guidelines apply to all ships and provide the minimum recommended level of maintenance

and inspection for fixed fire protection systems.

Onboard maintenance and inspection should be carried out in accordance with the vessels

maintenance plan, which should include the minimum elements listed in sections 4 to 10 in the

MSC.1/Circ. 1432 guidelines.

Weekly test and inspection

1 Verify all UCP indicators and alarms are functional (lamp test).

2 Visually inspect the pump unit and its fittings.

3 Check pump unit valve positions, if valves are not locked, as applicable.

4 Verify unit tank water level.

Monthly inspections should be carried out to ensure that indicated actions are taken for the specified

equipment.

Monthly test and inspection

1 Verify all unit control or stop valves are in proper condition, and in the right open or closed

position.

2 Test automatic starting arrangements on all unit pumps as designed.

3 Verify unit standby pressure.

4 Check unit audible and visual alarm devices for proper function.

In addition to the monthly test schedule, the following check and inspections should be carried out

at least every 12 months, to ensure that the indicated actions are taken for the specified equipment.

PAGE 46 / 48



Annual test and inspection

1 Externally examine all high-pressure cylinders for evidence of damage or corrosion.

2 Check the hydrostatic test date of all high-pressure cylinders.

3 Functionally test unit(s) audible and visual alarms.

4 Flow test all unit pumps for proper pressure and capacity.

5 Verify that all pump unit relief valves are properly set.

6 Examine unit filters to verify they are free of debris and contamination.

7 Functionally test the automatic unit tank filling system (see test procedure in DIOMA manual

for your system).

8 Test emergency power supply switchover, where applicable.

9 Check condition of batteries if any. Renew if capacity is less than 80% or batteries are more

than 3 years old.


PAGE 47 / 48

NOTES

DANFOSS SEMCO A/S MIDDELFARTVEJ 9 · DK-5000 ODENSE C · DENMARK TEL.: +45 7488 7800 · FAX: +45 7488 7801 [email protected]

PAGE 48 / 48

CVR / VAT DK 29 42 44 70 www.danfoss-semco.com

Danfoss Semco A/S

History

Danfoss Semco A/S is a global leader in the sale, development, production and

service/commissioning of certified fixed fire fighting systems. In 2006, two leading firms in the

field, Danfoss A/S and Semco Maritime A/S, joined forces to form the present company, with

Semco Maritime boasting over half a century of expertise in designing and installing fixed fire

fighting systems. All the while, Danfoss has developed and delivered key components for the high-

tech systems.

Today Danfoss Semco is an integral part of the Danfoss Group, Denmark’s largest industrial

manufacturing company with a daily output of more than 250,000 finished components. With more

than 24,000 employees worldwide, Danfoss is truly a global company.

Our business

Our company is located in Odense, Denmark.

Our Marine division comprises two main technologies: high-pressure water mist technology and gas

and foam technology. We push the boundaries of design and development to offer a wide range of

solutions for numerous application areas on almost any type of vessel.

Danfoss Semco is the world’s largest supplier of low-pressure CO2 fire fighting systems for the

marine industry. This division supplies gas, foam and dry chemical powder systems worldwide.

In the Industrial and Commercial division, Danfoss Semco has a successful track record with

applications ranging from complex fire fighting systems for museums and heritage sites to industrial

applications, office buildings and universities.

Global service

The Service Department at Danfoss Semco provides service, spare parts and technical support for

ship owners and vessels worldwide. Experience shows that periodic service carried out by the

manufacturer and the use of manufacturer approved spare parts is the best way to keep your fire

fighting system in good operating condition at the lowest possible life cycle cost.

Please do not hesitate to contact our Service Department at: [email protected]

mailto:[email protected]

Documents

END USER MANUAL - Danfoss · 2020. 2. 26. · END USER MANUAL OPERATION AND MAINTENANCE OF HIGH PRESSURE WATER MIST PUMP UNIT REVISION 4, MAY 2016 PAGE 7 / 48 1 Introduction 1.1 Safety