Grundfos FireSAFE Series User manual

www.grundfos.co.uk
FireSAFE Domestic Range
Installation and Operating instructions
For use in Domestic properties
Installer Contact Details
Name
Company
Tel (Regular hours):
Tel (24 hour):
Email:

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EC/EU Declaration of Conformity
Name of manufacturer: Grundfos Manufacturing Limited.
Address: Ferryboat Lane,
Castletown,
Sunderland.
SR5 3JL.
We, Grundfos, declare under sole responsibility that the product FireSAFE, to which the
declaration below relates, are in conformity with the Council Directives listed below on the
approximation of the laws if the EC/EU member states.
Machinery Directive (2006/42/EC).
Standards used: EN ISO 12100:2010
Low Voltage Directive (2014/35/EU).
Standard used: EN 61439-1:2011
EMC Directive (2014/30/EU)
Standard used: EN 61000-6-1:2007 and EN 61000-6-3:2007+A1:2011
Construction Products Regulation EU no. 305/2011
Standard used: EN 12845:2004+A2:2009
This EC/EU declaration of conformity is only valid when published as part of the Grundfos
Installation and Operating instructions (publication number 98952970).
Authorised signature:
John Austin –Engineering Manager
(Name) (Position)
Date of issue: 01/03/2016
The Grundfos FireSAFE (Safe Active Fire Equipment) range is designed to comply with the
recommendations of British Standard, BS9251:2014.
(BS9251:2014 Fire sprinkler systems for domestic and residential occupancies. Code of practice)

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Table of Contents
1.0 When and how to use this installation and
operating manual
2.0 Symbols used in this document
3.0 Scope of these instructions
4.0 Product identification
5.0 Product description and introduction
6.0 Key product components
6.1 Pump
6.2 Pressure gauge
6.3 Pressure switches (Primary and Secondary)
6.4 Non-return valve
6.5 BS 9251:2014 Flow test connection and
pressure switch testing provision.
6.6 Controller
7.0 Description of controller features
7.1 Modes of operation
7.2 Integration of digital signals
7.3 Mains power monitoring
7.4 Semi-Auto learning of pump condition
7.5 Automatic weekly pump self-test
7.6 Manual testing of pump health
7.7 Setting of weekly test time
7.8 Routine maintenance reminder
7.9 Excessive pump operation/leak detection
8.0 General Information
8.1 Delivery and handling
8.2 Delivery inspection upon receipt
8.3 Warranty
8.4 Site storage
8.5 Frost protection
8.6 Operating environment
8.7 Installation location
8.8 Breaktanks and mains water connection
8.9 Installation general requirements
8.10 Wall fixing dimensions
8.11 Operating conditions
9.0 Installation and commissioning
9.1 Pressure switch setting
9.2 Electrical power connections
9.3 Digital input and output connections
9.4 Installation checklist
9.5 Commissioning checklist
9.6 System verification checklist
10.0 Operation
11.0 User inspection
11.1 User inspection checklist
12.0 User maintenance
12.1 User maintenance checklist
12.2 Professional maintenance
13.0 Service and annual test
13.1 Servicing and annual checklist
14.0 Technical information
15.0 Spare parts list
16.0 De-commissioning, dismantling and
disposal
16.1 De-commissioning
16.2 Dismantling
16.3 Disposal
17.0 Fault finding checklists
18.0 History log (owners record)

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1.0 When and how to use the FireSAFE Installation & Operating manual
Prior to Installation, Commissioning and System verification of this product, the
installer should fully read this Installation and Operating manual.
The Installation and operation must also comply with local regulations and accepted
codes of good practice.
Use the Installation checklist, when installing the product, Section 9.4
Use the Commissioning checklist, when installing the product, Section 9.5
Use the System verification checklist, when installing the product, Section 9.6
Prior to Operation of this product, the user should fully read this Installation and
Operating manual fully. The user is responsible for periodic inspection of the product, at
a recommended interval of every 6 months.
Use the User inspection checklists, Section 11.1
Prior to Fault finding on this product, read this Installation and Operating manual fully.
Use the Fault finding checklists, Section 17.0
Prior to Servicing and the annual test on this product, read this Installation and
Operating manual fully.
Use the Service and annual test checklist, Section 13.1
The use of this product requires experience with and knowledge of the product.
Persons with reduced physical, sensory or mental capabilities must not use this
product, unless they are under supervision or have been instructed in the use of the
product by a person responsible for their safety.
A product History log is included for the installer to complete and the user to retain.
All activities relating to installation, commissioning, system verification, service, annual test and
any other maintenance performed on the product should be logged.
For quick reference the front page of this Installation and Operating manual should be filled in
with the contact details of the Installer or building supervisor. This manual should stay with the
FireSAFE unit.

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2.0 Symbols used in this document
WARNING
If these safety instructions are not observed, it may result in personal injury or damage
to property.
WARNING
If these instructions are not observed, it may lead to electric shock with consequent
risk of serious personal injury or death.
CAUTION
If these safety instructions are not observed, it may result in malfunction or
damage to the equipment
NOTE
Notes or instructions that make the job easier and ensure safe operation
3.0 Scope of these Instructions
These Installation and Operating instructions apply to the:
Grundfos FireSAFE (Domestic Range of units)
For Technical Information consult the FireSAFE Datasheet and the Technical information
section of this manual.
For CM Pump specific information please consult the CM Installation and Operating manual
supplied with the product documentation.
All of the above documents can also be found on the Grundfos Product Center website at:
www.grundfos.co.uk
4.0 Product Identification
The FireSAFE unit has a silver label attached to the top of the front cover.
This label gives the following key information.
CAUTION
NOTE
Part no
Serial No.
Electrical Data
Hydraulic Data

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5.0 Product introduction and description.
The Grundfos FireSAFE (Safe Active Fire Equipment) range of pump packages is designed to
comply with the recommendations of British Standard, BS9251:2014.
(BS9251:2014 Fire sprinkler systems for domestic and residential occupancies. Code of practice)
The product is designed to the highest standards and is intended to give many years of trouble
free service while protecting lives and property.
The FireSAFE unit is all contained within a two-piece steel cabinet.
The following components are integrated within the FireSAFE product:
Pressure gauge.
External View Internal View
The following components are supplied with the FireSAFE product:
1 x Product and packaging, 2 x AAA batteries*, 1 x Stop Operation sticker,
1 x System Healthy zone sticker, 1 x Installation and Operating Manual**,
1 x CM Quick guide and CM Pump booklet, 1 x M12 Cable gland.
*It is advisable, when replacing batteries that the same make and type are used
and only new batteries are used when replacing old ones.
The system does not charge the batteries so re-chargeable batteries are not to be used.
NOTE
Pressure
switch test.
Suction port.
Discharge port.
Controller
CM Pump.
Flow test
connection.
Non-return valve
Priming screw
Secondary
Pressure Switch
Primary
Pressure
Switch

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** It is advisable that the Installation and Operating manual remains with the
product for the duration of the product lifecycle.
The Grundfos FireSAFE supplies water, usually from a storage tank, via a riser system within
the building to a series of sprinkler heads. When the air temperature around a sprinkler head
reaches a predetermined level, the glass bulb bursts, leading to a loss of system pressure and a
flow of water through the sprinkler head. Only sprinkler heads affected directly by the heat
source will operate.
This loss of pressure is detected by the Grundfos FireSAFE unit, via an internal pressure switch,
activating the pump.
6.0 Key product components (See the diagram in section 5.)
6.1 Pump
From the Grundfos high quality CM centrifugal horizontal multi stage range.
Choice of six sizes available within the FireSAFE (Domestic range).
6.2 Pressure gauge
Providing visual indication of the system pressure/health and for fine-tuning the pressure
switch setting. Range of gauge 0 - 10 bar or 0 - 145 psi.
6.3 Pressure switches (Primary and Secondary)
The FireSAFE unit operates directly from an integrated pressure switch. This pressure switch is
adjusted to meet the site specific requirements. See the section 9.1 regarding Pressure switch
setting. A secondary back up pressure switch is provided in case of failure of the primary
pressure switch. This activates at a factory set value of 1 Bar.
6.4 Non-return valve (NRV)
Included within the product to maintain the system pressure.
Integrated into the 5 way connector.
6.5 BS 9251:2014 Flow test connection and pressure switch testing provision
The FireSAFE unit has an inbuilt provision for a Flow test connection and testing the operation
of the pressure switches.
The Flow test connection is a PTFE sealed 1” plug on the top of the 5 way connector.
If using a flow meter, it is possible that the pipe diameter may need up-sizing, see guide below.
The below provides the necessary diameter for each flow range:
Pipe diameter 1" Flow range –20 - 200 L/min
Pipe diameter 1.5" Flow range –200 - 400 L/min
Pipe diameter 2" Flow range over 400 L/min
Pressure switch testing is performed via the operation of a draincock fitting on the reverse side
of the 5 way connector. A small amount of water is drawn from the draincock to reduce the
system pressure to activate the pressure switch. Care must be taken to minimize the risk of
water spillage and associated issues this may have with any nearby electrical equipment.
NOTE

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6.6 Controller
The Controller has been specifically designed by Grundfos to conform with BS 9251:2014,
integrate key system signals, monitor condition and to operate automatically.
The following are features of the FireSAFE controller:
Modes of operation:
oPressure maintenance
oFire
oService
Integration of digital signals:
oLow water level
oFlow switch
Mains power monitoring / Controller internal fuse monitoring
Semi-automatic learning of the pump condition
Automatic weekly pump health test, including:
oPump fault monitoring
oPump health monitoring
Manual pump health test
Setting of the Automatic weekly pump test time
Annual service reminder (12 months from system verification)
Excessive pump operation / Leak detection (> 10 operations in a 7 day period)
7.0 Description of Controller features
7.1 Modes of operation
The FireSAFE unit can operate in one of three modes:
Mode 1 –System Pressure Maintenance (or “Jockey Pump”)
Mode 2 –Fire
Mode 3 –Service
Mode 1 –System pressure maintenance (or Jockey Pump) mode
If the system pressure decays enough to activate the integral primary pressure switch, the
FireSAFE unit will run the pump for 20 seconds. This will be sufficient to re-pressurise the
system.
The maximum number of maintenance cycles within a 7 day period before the system registers
this as a fault is ten. This excludes the automatic weekly pump self-tests.
On exceeding this the Fault LED on the Control panel and Fault Digital output (D01) are
activated requiring attendance to reset.

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Mode 2 –Fire mode (or Main pump/Duty pump).
If the system pressure decays enough again within the next 20 seconds following the system
pressure maintenance mode de-activation the FireSAFE unit will immediately switch to Fire
mode and run the pump continuously until stopped by the return of the system set point
pressure and the pressing of the Test/Reset button on the control panel.
Instructions for setting and adjusting the Pressure Switches can be found in section Pressure
switches setting, section 9.1, along with the factory pressure settings of the FireSAFE.
Mode 3 - Service mode
The FireSAFE unit has a Service mode, the functions include:
Fault status reset
Service status reset
Pump run counter reset (>10 operations in 1 week period)
Pump calibration
To access the service mode follow the below procedure
When in service mode, the ALARM!, SERVICE and FAULT lights will illuminate.
When in service mode the following activities can be undertaken:
Pressing the test button for 1 second will reset all Fault and Service requests and return
to the normal operation.
Pressing and holding the test button for >10 seconds will start the pump condition
learning and return to the normal operation. This will also reset all Faults and Service
requests and return to the normal operation.
(Press and hold the test button until a long beep is heard).
Press and
hold the Test
button for
>10 seconds
Pump runs Buzzer beeps
once
Pump stops,
buzzer beeps
for a second
time
release
button
Service and/or Fault LEDs will flash if
previously flashing.

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7.2 Integration of digital signals (Low water level switch and Fire alarm device)
The FireSAFE unit has been specifically designed with the ability to power and relay digital
signals. The signals could be from any source but Grundfos suggest the following important
signals are used:
Digital input/output (DI2/D02) –Tank low water level switch device, to give a warning once
the water storage capacity has been reduced below the low level mark. The signal needs to be
present for more than sixty seconds before the controller activates the output.
Digital input/output (DI3/D03) –Water flow switch device, the only device allowable under
BS9251:2014 to indicate the presence of a fire and to give an alarm. Water flow switches
normally incorporates an adjustable delay option. This should be optimised to the site
conditions to prevent activating the Fire Alarm unnecessarily.
Consult the documentation supplied with your device.
The digital inputs are “wetted” with a 24 V DC voltage which can be applied to the digital
switching devices. Upon the changeover of the switch condition the digital inputs are relayed to
the volt free digital outputs for integration with an Alarm Control panel, Siren or other device.
The “wetted” inputs supplied by the FireSAFE unit remove the need to supply the signalling
device with power from another source. The inputs are optically coupled to the outputs and
hence voltage/current isolated between each other.
Neither Digital input inhibits the FireSAFE system from operating.
Further details in Electrical Installation section
7.3 Mains power monitoring / Controller internal fuse monitoring
On the application of mains electrical power the Power LED on the controller front panel
illuminates and the Fault relay (D01) to moves to its healthy position.
Upon failure of the mains power or the controllers internal fuse the LED extinguishes, the Fault
relay moves to its unhealthy positon and after more than 2 hours without power the internal
buzzer activates for 1 second every 30 minutes. This will continue until the Test/Reset button
is pressed. Buzzer becomes active again at next weekly test.
7.4 Semi-automatic learning of the pump condition
The FireSAFE controller is factory set to the pump full load current (FLC), and it can be reset in
the field following a change to the pump. Follow the service mode instructions in section 7.1.
This should be done against a closed valve system pressurised condition.

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7.5 Automatic weekly pump health test.
As a preventative measure to counter pump/shaft seal seizure and to check the operational
state and health of the pump the controller performs a weekly test of the pump for a period of
approximately 10 seconds. The controller measures the full load current (FLC) the pump draws
performing two checks against hardwired values and two checks against learned FLC current
values of the pump. Test details below:
Measured current test
Testing for
Upon failure
1) Measured Current is > 1 Amp
Pump Open circuit/Pump fuse
failure
Activate Fault relay/Fault LED
2) Measured Current < 14.3 Amps
Pump short circuit/shaft seal
seized
Activate Fault relay/Fault LED
3) Measured Current within + 30 % of FLC
Pump wear and tear
Activate Service relay/Service LED
4) Measured Current within - 30 % of FLC
Pump wear and tear
Activate Service relay/Service LED
If the measured FLC fails checks 1) or 2) then the system has failed and requires immediate
attention. The Fault relay and LED are activated.
If the measured FLC fails checks 3) or 4) then the pump requires replacing or servicing, the
Service relay and LED are activated.
The time of day that the self-test is performed can be programmed at the Commissioning
stage and Re-set by the user at any time. (See the Commissioning checklist)
7.6 Manual pump health test
The Pump health can be manually tested by pressing the Test/Reset button until the pump
runs. The test is the same as the Automatic weekly pump self-test.
Press and hold the Test
button for >2 seconds Pump runs

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7.7 Setting of the Automatic weekly test time
The time of day that the self-test is performed can be programmed by pressing the Test/Reset
button for more than 5 seconds and releasing after the buzzer beeps.
This should be done at Commissioning stage and can be re-set by the user at any time.
This will reset the weekly test time to the same time every week.
7.8 Annual service reminder (12 months from system verification)
At the end of every twelve month period the Service LED is activated to remind the user that
the unit is due its yearly service and BS 9251:2014 Annual test. Refer to the servicing and
annual test checklist.
7.09 Excessive pump operation / Leak detection (> 10 operations in a 7 day period)
If the pump is activated more than ten times in any 7 day period the system is deemed to have
a leak and hence maintenance is required. The Fault Digital output and Fault LED are activated.
This can be reset after it has been attended to by following the service mode instructions in
section 7.1. This should be done against a closed valve system pressurised condition.
Press and hold
the Test button
for > 5 seconds
Pump runs Buzzer beeps
once Release button

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8.0 General information
8.1 Delivery and handling
The FireSAFE unit is supplied from the factory in a cardboard box which will be
mounted on a wooden pallet suitable for handling by forklift equipment.
The weight and size of the FireSAFE unit may require the use of proprietary lifting equipment
in order to be handled safely. Please observe the weight indicated on the box label before
selecting lifting method. Do not stack items on top of the box. Do not drop the pallet.
The weight of the unit can also be found in the Product range –Weights section.
8.2 Delivery inspection upon receipt
The FireSAFE should be immediately unpacked and inspected.
Any damage must be reported to the supplier within seven days in writing.
It is important that this Installation and Operating manual is studied carefully before
any installation takes place. The installation and operation should also be in
accordance with local regulations and accepted codes of practice.
Under no circumstances should the unit be operated until correctly installed in the
system pipework and ensure that the controller box cover and product cover are
secured in their appropriate positions.
8.3 Warranty
1. The Grundfos warranty covers all defects within the FireSAFE originating from faulty
workmanship and/or materials for a period of two years from the date of installation or
thirty months from the date of despatch from the factory, whichever is the shorter.
2. The warranty covers the replacement of any faulty parts and our labour cost to replace the
faulty parts. It does not cover the cost of removing, returning and refitting the FireSAFE unit
or any secondary losses arising from the failure.
3. Under no circumstances should faulty equipment be dismantled. Failure to comply with this
instruction could invalidate the warranty.
4. Defects arising from incorrect installation, water containing debris, or harmful chemicals,
inadequate electrical protection, faulty ancillary equipment, lightning or other circumstances
beyond our control, are not covered by the warranty.
8.4 Site storage
It is strongly recommended once the FireSAFE unit has been delivered to site, that it is placed
immediately into a dust, moisture and frost-free area which has been secured to prevent
unauthorised interference. If this is not possible then the unit should be stored in an area
which is as near as possible to the ideal storage conditions as described above.

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8.5 Frost protection
The FireSAFE unit must be protected from freezing conditions. The unit may require
trace heating or lagging. If the FireSAFE unit is being stored during periods of frost the whole
unit should be drained to avoid damage. Remove all drain and vent plugs and allow the pump
to drain. Do not replace the plugs until the FireSAFE unit is to be used again.
The pump must be vented/primed before it is started again.
See section 5 for priming screw location.
Loosen but do not remove the priming screw until water flows from the hole.
8.6 Operating enviroment
The FireSAFE unit must not be used in an environment which has been classified as
hazardous where it could provide a source of ignition and therefore cause an explosion by
flame path.
Grundfos do not accept any responsibility for the use of FireSAFE unit to pump liquids which
could be construed as being hazardous to health either by touch, ingestion or inhalation of
fumes or gases given off by the liquid.
8.7 Installation location
Careful consideration must be given to the location of the FireSAFE unit.
The following are minimum requirements:
The FireSAFE unit should ideally be placed in a location where the Control panel LEDs can
readily be seen and the internal buzzer heard without obstruction.
These are primary warning and alarm events and should be available to be observed and
heard. Additional system provision for alerting the inhabitants to the FireSAFE warnings/alarm
must also be made.
The FireSAFE also needs to be protected against the extremes of temperature during a
Fire and during the winter. Provision to maintain the FireSAFE’s operating conditions needs to
be made within the overall system design.
The FireSAFE unit should be sited in a dry, well ventilated, and frost-free position, where
it will not be subjected to extremes of temperature.
The FireSAFE may be located outdoors in a weather, frost and rodent proof enclosure
with adequate ventilation especially during hot weather. All pipe work subject to freezing
conditions must be adequately protected. Alternative system provision must be made for
alerting the inhabitants to the FireSAFE warnings and alarms.
To enable maintenance and service of the FireSAFE unit to be carried out satisfactorily,
the area should have adequate lighting for this work to be carried out safely.

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Ensure that the FireSAFE is positioned to allow access for examination and service. A
minimum of 50cm should be left all around the FireSAFE unit.
Adequate drainage facilities and protection from water damage in the immediate
vicinity of the FireSAFE unit must be provided.
If the FireSAFE unit is installed into a roof spaces, then provisions should be made for
the small level of vibration associated with any rotating equipment in case it causes
disturbance. Provision should also be made for drainage of the unit, leakage and any loss of
water during commissioning and service.
The FireSAFE unit should not be installed in an unventilated small space, ensure
adequate ventilation for the motor.
8.8 Breaktanks and mains water connection
In some situations, and with the permission of the Water Utility company, it may be
possible to connect the FireSAFE unit directly to the town water mains. A dedicated
suction pipe will be required, the diameter of which should match the pump suction as an
absolute minimum.
In situations where the town mains supply cannot be utilised directly it will be necessary to
install a water storage tank (break tank) between the incoming mains water supply and the
FireSAFE unit, it must however have a type AB Air Gap and be supplied and installed in
accordance with the Water Byelaws Regulations. Grundfos can offer a suitable break tank.
Check that the water storage tank has adequate capacity to meet/exceed the demand.
8.9 Installation general requirements
The suction and discharge pipework must be at least the same size as the FireSAFE
suction and discharge ports, as a smaller size may result in reduced pump performance
or increased system resistance leading to a reduced flow.
The installation suction and discharge pipework may need to be properly supported
before being connected to the FireSAFE unit so that the FireSAFE unit is not stressed.
The pipework installation to and from the FireSAFE unit should be in accordance with
local water authority regulations, best industry practice and according to the design
recommendations in BS 9251 latest revision.
The electrical installation of the FireSAFE unit should be in accordance with the latest
issue of the I.E.E. regulations and according to BS 9251 latest revision.

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8.10 Wall fixing dimensions
All FireSAFE units must be installed with the unit orientated such that the pump is in the
horizontal plane. The FireSAFE unit should be stood on a solid surface that will not transmit the
small amount of vibration that the rotation of the pump will generate.
The FireSAFE unit can be stood on another surface providing vibration insulation is used.
The CM3 and CM5 FireSAFE units are designed with the possibility of wall mounting.
The wall will need to be a suitable load bearing wall. Fixings are not supplied with the unit and
consideration should be given to vibration insulation between the unit and the wall.
The wall mounting hole dimensions are given in the below figure. The unit should be fitted
with the minimum of spacing of 50 cm all around and in front for Service.
Figure 7

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8.11 Operating conditions
Electrical supply: 230 V +6 / -10% Controller fuse: F1 –500 mA, Pump Fuse: F2 - 15 A
Electrical load: see Product Range –Electrical Requirement, section 14.1
Pollution Degree: 3 Noise level: <65 dB(A) at full speed
Liquid temperature range: +3°C to +60°C Ambient temperature: From +3°C to 40°C
Relative humidity: up to 95 % non condensing Altitude: use up to 2 km above sea level
Usage: Indoor (Outdoor, subject to restrictions found)
Type of protection: Class 1 (earthed) equipment
Equipment type: Stationary, fixed equipment
Construction type: Fixed construction, no moveable parts
EMC Environment: B (light industrial, commercial and residential)
Primary pressure switch (DANFOS) range: -0.2 to 8 bar
Secondary pressure switch (GEMS) range: 0.3 to 1.7 bar
Pressure gauge range: 0 to 10 bar
Pump casing pressure rating: 10 bar
Inlet pressure max: 8 bar (less pump generated pressure)
Pump generated pressure: see Product Range –Pressures and Flows, section 14.2
9.0 Installation and commissioning
The FireSAFE unit has been designed to minimize and simplify the number of installation and
commissioning activities required to bring the system on line.
All electrical connections should be carried out by a qualified and authorised electrician
in accordance with the wiring diagram supplied within the control panel/this manual,
the latest I.E.E. regulations and in accordance with BS9251 latest revision.
All mechanical connections should be carried out by a by a qualified and authorised
person in accordance with BS9251 latest revision and the relevant codes of practice
The FireSAFE unit must be earthed.
Do not attempt to start the pump even to check the direction of rotation until the
system has been filled with water and both the pump and the system have been
primed/vented. Running the pump dry may permanently damage it. This will not be
covered by warranty.
Do not remove the controller enclosures, controller components, motor terminal box
cover, electrical cables or any other electrical protective covering without first ensuring
that the electrical supply is suitably isolated and cannot be switched back on.
Do not attempt to supply electricity to the controller/unit and run the pump electric
motor without ensuring that all electrical fittings, cables and enclosures are intact and
suitably electrically isolated from human touch during operation.
Do not attempt to supply electricity to the electric motor or re-pressure the pipe work
system without first ensuring that all protective coverings are held securely in their
correct positions.

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9.1 Pressure switch settings
The FireSAFE primary pressure switch is factory set according to the following table.
The factory setting may not be ideal for the site application, especially if a significant suction
pressure pre-exists. The operating range of the pressure sensor is -0.2 bar to 8 bar.
The factory setting can be adjusted as follows.
Figure 8 Pressure switch
Removing the pressure switch case exposes the user to electrical voltages
Model
Closed Valve Head
(m / bar)
Pressure Switch setting (OFF)
(bar)
Differential setting (ON)
(bar)
CM3-3
27.3 / 2.67
2.5
1.0
CM3-5
45.9 / 4.50
4.0
1.0
CM5-3
27.9 / 2.74
2.5
1.0
CM5-4
37.3 / 3.66
3.0
1.0
CM10-2
31.0 / 3.04
2.5
1.0
CM10-3
46.6 / 4.56
4.0
1.0
The pressure switch is found inside of the cabinet, on top of
the pump, requiring the removal of the front cover, on top
of the pump.
Adjustment is made with a cross head screw driver.
Position 1 on the drawing adjusts the set point (OFF). Coarse
adjustment can be made against the scale on the front of
the device.
Position 2 on the drawing adjusts the differential (Start).
Coarse adjustment can be made against the scale on the
front of the device.
For fine adjustment, adjust against the scale on the pressure
gauge.
Access into the pressure switch is not required.
Do not remove the pressure switch case.
The secondary pressure switch is factory set at 1 Bar and is
provided as a back up to the Primary Pressure switch.
No adjustment should be necessary. However adjustment
can be made via the screw fitting in the rear of the switch.

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9.2 Electrical power connections
The FireSAFE unit requires fitting with a suitable flame retardant power cable.
The power cable must be wired into a suitable lockable isolator switch to provide the power to
the system and to the Mains In terminals in the below PCB layout.
9.3 Digital input and output connections
The digital inputs and outputs require connecting as per the following:
Figure 9 –PCB layout for Digital Input/output connections (shown inside of the Controller)
1 x M12 cable glands is provided in the Controller box for either of the two possible digital
inputs. (Another is supplied in the document package if required)
Digital Outputs for:
D01 - Fault (OUT1)
D02 - Low Water level Warning (OUT2)
D03 - Fire Alarm (OUT3)
Digital Inputs for:
DI2 - Low Water level (IN2)
DI3 - Flow switch (IN3)

GRUNDFOS INSTRUCTIONS
www.grundfos.co.uk Page 19 of 35
1 x M20 cable gland is provided in the Controller box for a multi-core cable to carry digital out
signals. (OUT1, OUT2, OUT3)
The PCB terminals shown above will accept conductors up to 1 mm in cross section diameter.
It is recommended that the conductors are ferruled first.
The Digital inputs/outputs are each designed as per below.
Figure 10 –Configuration of digital input and output connectors
Earth (typically unused)
Normally
Open
Normally
Closed
Common
24 V DC for Inputs
VFC for outputs