Honeywell Notifier Nfs28 Manual

							997-492-000-6, Issue 6
July 201114
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
5 Panel Electronics
The Fire Control Panel is supplied with the following
factory-fitted electronic equipment:
•Main PCB
•PSU PCB
These PCBs do not need to be removed to install
the back box.
5.1 Main PCB
The Main PCB is pre-fitted in the panel and does not
require removal for panel installation.
Multi-mode pushbuttons and status indicators on the
Main PCB are used for all panel setup and configuration
actions.
The Main PCB is provided with the following features:
a. Function pushbuttons
b. Panel status indicators
c. Wiring connectors for zone wiring
d. Wiring connectors for digital inputs
e. 16-way ribbon cable connection to PSU PCB
f. Power connector to backup batteries
g. Socket SK1 connector for optional 2-way relay PCB.
h. Cover-off detection switch
i. Access Level control switch
j. Standby battery/ charger fuse.
Removing the Main PCB
Ensure ALL power is disconnected from panel and
that suitable anti-static precautions have been taken.
1 Disconnect the earth lead connection to the right- angled, blade connector (A) located at the top, right-
hand corner of the Main PCB.
2

Carefully push up the two PCB-retaining clips (B) until
the top edge of the Main PCB is free to move (the
bottom edge of the PCB is still held in place by the
three tabs (C).
3 Gently pull the top of the Main PCB away from the back box.
4 Disconnect the ribbon cable at socket connector SK4 (D) on the Main PCB.
Note: If the Main PCB is removed ensure the plug
remains seated in the socket on the PSU PCB.
B
C
D
A 
						

							997-492-000-6, Issue 6July 2011
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
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Refitting the Main PCB
The procedure for refitting the Main PCB is the reverse
of the removal procedure but note the following points:
When offering the Main PCB to the three locating tabs
(C) make sure that:
i Make the ribbon cable connection at socket connectorSK4 (D) and re-connect the earth lead to the blade
connector (A).
ii The ribbon cable is correctly located within the rebate on the bottom edge of the Main PCB.
iii The PCB is correctly aligned with the rebates in the side wall ribs (E) before gently pushing it home - confirmed by
audible clicks from the PCB-retaining clips (B).
Note: For simplicity, the lettering of key items remains
the same as for the removal process.
5.2 PSU PCB
The PSU PCB provides all power requirements for the
panel when in quiescent and alarm conditions.
The mains supply live (L) and neutral (N) wiring is brought
into the panel and terminated at the Mains Termination
Block (MTB) located in the top right-hand corner of the
PCB. Refer to  Section 6.4 Powering the Panel  for details
on terminating the mains wiring at the MTB and the mains
safety earth at the earth post (E) in the back box.
The PCB is fitted with wiring connectors for:
a. Two sounder output circuits
b. One 24Vdc auxiliary output circuit.
c. Up to two, optional-fit 8-way Relay PCB(s)
d. Up to two, optional-fit 4-way Sounder PCB(s).
Power and signal connection to the Main PCB is via the
16-way ribbon cable connector (SK2).
5.3 Label Inserts
The following paper text inserts are supplied for:
•Zonal Fire/Fault information
•Panel status.
To fit the text inserts proceed as follows:
1 Carefully remove all text inserts from the kit and select
the appropriate language. Discard the rest.
2 Make sure the moulded cover is removed from the
back box. With the rear face of the cover towards you:
a. The zonal text insert should be fed into the right-hand (viewed from the back) entry slot and pushed all the way
down until all text is correctly displayed in the window.
b. To fit the panel status indication text insert use the left- hand entry slot (viewed from the back) and push it
down until all  the text is correctly displayed. 
						

							997-492-000-6, Issue 6
July 201116
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
6 Commissioning
6.1 Introduction
It is recommended that the control panel is powered up
and tested before connecting the field devices.
6.2 Preliminary Checks
Before connecting the mains power to the panel, check:
1
The earth lead from the safety earth post is connected
to the earth tag on the Main PCB.
2 That the EOL devices are correctly terminated in the
zone input and sounder output terminals and no
external  wiring terminations have been made.
6.3 External Wiring
6.3.1 Zone Wiring - New Installation
Zone wiring should not be connected to the panel at this
stage.
6.3.2 Zone Wiring - Retrofit Installation
Zone wiring should not be connected to the panel at this
stage.
Refer to Section 7.5.6 EOL Device Type for details on
how to change the configuration of the panel, as
necessary, to support 4k7 resistor EOL devices.
Note:  Where Active-End-of-Line (AEOL) devices exist
on zone wiring these may need to be replaced
with 0.47μ F capacitor EOL devices. EOL device
type options are described in  Section 6.7 Zone
Wiring .
6.3.3 Sounder Circuits
Sounder output circuit wiring should not be connected
at this stage.
6.3.4 2-Way Relay PCB (Optional)
If the 2-way Relay PCB (PN: 020-713) is to be fitted,
refer to the installation instructions supplied with it. Refer
to Section 7 Configuration  for details on configuring
the two relay output circuits.
6.3.5 8-Way Relay PCB (Optional)
If fitting 8-Way Relay PCB(s) (PN: 020-747) refer to the
instructions supplied with it.
6.3.6 4-Way Sounder PCB (Optional)
If fitting 4-Way Sounder PCB(s) (PN: 020-772) refer to
the instructions supplied with it.
0.47μ F
capacitor
4k7 resistor
AEOL device
(typical)
-
+ 
						

							997-492-000-6, Issue 6July 2011
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
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6.4 Powering the Panel
Before applying mains power to the control panel
make sure that you carry out the following checks and
procedures:
1 Check that you carried out all the instructions
described in  Section 6.2 Preliminary Checks .
2 Prepare the mains supply wiring for connection as
follows:
i Remove the outer cable sheath to provide sufficient slack, approximately 100mm, in the wiring to assist
termination. Cut the Live (L) and Neutral (N) wires
about 20mm shorter than the safety earth. See
drawing at left.
ii Form each wire in a ‘pigtail’ before taking it to its termination point. Route the L and N wires such that
there is separation from the safety earth. See drawing
at below left. Secure the L and N wiring with the
supplied cable tie before terminating the L and N
wiring. The safety earth should not be secured by
the cable tie.
iii Connect the L and N wires (A) directly to the MTB (B). The safety earth wire (C) MUST NOT be
terminated at the MTB but at the safety earthing post
(D) provided. See drawing at left.
Note: The post (D) is located to the left of the mains cable
tie anchor (E). A 4mm, crimp-on, ring terminal is
provided for the connection of the mains safety earth
wiring to the post. This crimp will accept cable
conductor sizes between 0.5 to 1.5 mm
2.
iv Terminate the safety earth wire using the supplied 4mm crimp-on, ring terminal (F), 4mm nut (G) and
spring washer (H) provided (see drawing at left).
6.4.1 Standby Batteries
The panel back box can hold up to two 12V,  7Ah standby
batteries. The batteries are not supplied with the panel.
Refer to  Section 8 Specification  for details of
recommended batteries.
Note: The panel can function satisfactorily on batteries
only, if required, when mains power is not available.
However, this should only be  done for short periods
to avoid inadvertant discharge of the batteries.
To install the batteries:
1 Install the  batteries in  the back box.  The batteries
should be positioned so that their terminals are close
enough to allow connection of the short interlink cable.
An air gap of at least 10mm should be maintained
between the batteries to assist cooling. 
						

							997-492-000-6, Issue 6
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EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
2Connect the batteries using the provided items:
a. Red battery lead (1 off)
b. Black battery lead (1 off)
c. Short battery interlink lead (1 off).
One end of each battery lead is fitted with a connector.
The other end of the red and black battery leads
should be connected to the battery charger
termination block (TB8) located in the bottom, right-
hand corner of the Main PCB.
Note: The insulation on the end of the red and black
battery leads has been semi-stripped to facilitate
connection to the termination block TB8.
3 Remove the semi-stripped insulation from the end of
each battery lead. Terminate the end of each battery
lead to the appropriate terminal on termination block
TB8: the red lead to the  +ve connection and black
lead to the  -ve connection.
4 Connect the other end of the red lead to the  +ve
terminal of one battery and the black lead to the  -ve
terminal of the other. Connect one end of the short
interlink lead to the  +ve connector of one battery (refer
to drawing at left).
Note: The order of connecting mains and batteries to the panel is not important .
5 Turn on the AC mains supply, or connect the battery
interlink lead, and verify that after power up the
following indications occur:
i The POWER LED lights.
ii The buzzer sounds.
Note: This is true for both mains and batteries only. If
using batteries only, ensure that they are kept
charged. If the batteries are in a poor state of
charge they will fail the battery load test and a
PSU fault will be indicated. See the note at left
regarding battery load testing.
6 When the panel is powered up the Fault and Power
Supply Fault LEDs will light and the buzzer will operate
intermittently.
7 Press the RESET pushbutton to extinguish the Fault
and Power Supply Fault LEDs and mute the buzzer.
Note: If the panel indicates that fault(s) are still present
DO NOT continue with panel commissioning until
ALL such faults have been cleared. Refer to
Section 6.10 Fault Finding Chart .
8 With no fault indications the panel is now ready for
the commissioning tests to be carried out.
7 Layout of battery terminals may
vary from that shown above.
4
2, 3
CAUTION -
ENERGY HAZARD! NEVER short the
battery terminals.
TB8 ( - )
Battery 1 TB8 ( + )
Battery 2a
b
c
Battery Load Test
With the batteries connected the panel
performs a regular battery wiring integrity test.
A failure occurs if the measured resistance
is out of range on two succesive tests.
A test failure is indicated by a PSU fault.
Check for poor battery wiring connections and
remedy.
If the batteries require charging the test is
suspended for up to12 hours, to allow time for
the batteries to recover, and re-applied. 
						

							997-492-000-6, Issue 6July 2011
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
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Recommended Battery Size
The recommended battery sizes are given in the table
below. The table is in two parts: the top part recommends
battery sizes when 0.47μF capacitor EOL devices are
used with 2, 4 or 8 zone panels and with 24hr or 72hr
battery backup. The second part recommends battery
sizes when 4k7 resistor EOL devices are used with 2, 4
or 8 zone panels and with 24hr or 72hr battery backup.
The table below gives a quick guide to the battery size
required, provided that no load is connected to the
auxiliary output on the PSU PCB. If you need more detail,
or have connected an auxiliary load, please refer to the
full calculation table in  Section 9 Battery Calculation .
Note that the table below may specifiy slightly larger
batteries than using the calculation in Section 9.
Using Larger Battery Sizes
The largest battery size that can be installed in the back
box is 7Ah.  Batteries less than 2.8Ah should not be
used .W
Battery Disposal
As a mimimum, replace batteries every four years.
Always dispose of batteries in accordance with the battery
manufacturer

’s recommendations and local regulations.
2 Zone 4 Zone 8 Zone
2.8 2.8 2.8
777
2.8 7 7
777*
Alarm Current Standby Time
EOL
0.47 F 
Capacitor
4k7Resistor
Up to 1A 24hrs
Up to 1A 72hrs
Up to 1A 24hrs
Up to 1A 72hrs
*Maximum of 2 zones with 4k7 EOL
CAUTION
Batteries less than
2.8Ah should not be used. 
						

							997-492-000-6, Issue 6
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EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
6.5 Configuration and Handover
After all external wiring has been connected to the panel
and with no faults existing, the panel can be configured
for the particular system requirements.
After configuration has been completed and after any
faults revealed have been rectified, the system will be
ready for commissioning tests.
The configuration process is only possible with the panel
at access Level 3. Access Level 3 can only be achieved
when the front cover is 
not fitted (refer to Section 2.5.1
Removing the Cover). With the cover removed,  while
holding down the 
 pushbutton, press the following
pushbuttons in the order given -  
,  and .
Access Level 3 state is confirmed by the rapid flashing of
the FIRE LED.
6.6 Commissioning Tests
The following tests should be carried out after panel
configuration is complete. Refer to the User Manual (997-
493-00X-X) sections as listed below:
Test LEDs - refer to Section 6.1
Test zones - refer to Section 6.2
Test buzzer - refer to Section 6.1
Test outputs - refer to Section 6.2.
6.7 Zone Wiring
All methods support installations where detectors and
MCPs are segregated into different zones with separate
wiring. This  is necessary to comply with local standards
in some areas and also if a delay strategy is used.
Methods 1 and 2 support connection of MCPs and detectors
in any order and require the use of Schottky diode bases.
Method 3 requires MCPs to be connected electrically
nearer to the panel ahead of any detectors. Either
standard or Schottky bases may be used.
Method 1: Recommended
This method is recommended for all new systems. The capacitor
EOL allows the panel to provide enhanced fault detection with
lower power consumption than methods described below.
CAUTION - Heat Hazard!
Under certain fault conditions PCB areas identified by this symbol may  reach high
temperatures.
Note: When using Apollo 65 detectors and one has been
removed, the panel may fail to latch alarms from
470R
(nominal)470R
(nominal)
+
+
-
-
Schottky diode (short-circuited when detector is fitted)Schottkydiode(short-circuitedwhendetectorisfitted)
0.47µF0.47µF
* EOL device: use a 0.47µF capacitor or an AEOL.
Main PCB Zone
Input TerminationsMainPCBZone
Input Terminations
EN 54-2 &
ISO 7240-2: Annex D
Not more than 32 fire
detectors and or MCP’s may be connected to one zone.
!
EN54
ISO 7240!
EN54
ISO
7240 
						

							997-492-000-6, Issue 6July 2011
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
21
470R
(nominal)470R
(nominal)470R
(nominal)470R
(nominal)
++
-
-
MCP MCP
Main PCB Zone
Input TerminationsMainPCBZone
Input TerminationsRefer to Section 6.4.1 for details on standby battery sizes
and maximum number of zones.
Note: This method is not recommended for new
installations.RefertoSection6.4.1fordetailsonstandbybatterysizes
andmaximumnumberofzones.
Capacitor:
Use 0.47µF.Capacitor:
Use0.47µF.
4k7
Schottky diode bases can be used.Schottkydiodebasescanbeused.
Method 2:
Supports new and existing installations using Active End-
of-Line (AEOL) - PN: 020-417. For the AEOL to function
correctly an additional 10 μF stabilising capacitor must
be fitted across the zone terminals (not supplied - order
PN: 020-743).
Method 3
Supports existing installations where there is a 4K7 resistor
EOL fitted already and it is preferable to install the panel
without modifying the existing wiring. Call points must be
wired nearer to the panel than detectors. all detectors located between the removed device
and the panel. Although the use of a capacitor EOL
device meets the requirements of the standards,
method 2 should be used when alarm latching of
all detectors is required with one removed. 
						

							997-492-000-6, Issue 6
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EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
6.8 Sounder Circuits
Two sounder output circuits are provided. The
termination block, TB1, for the sounder circuits is located
at the top left-hand corner of the PSU PCB.
DO NOT CONNECT UNTIL ALL ZONES HAVE BEEN
CONFIGURED AND 

TESTED.
Before the sounder circuits are connected it is
recommended that all detection circuits are checked to
prevent the possibility of spurious alarm conditions being
generated. 

The sounders should be polarized and
suppressed using IN4002 (or similar) diodes and the
circuits should be fitted with 4k7 end-of-line resistors.
Each of the two circuits can be configured as a Sounder
output, a Fire routing output or a Fault output. Refer to
Section 7 Configuration  for details.
Refer to  Section 7.6 Sounder  Output Type/Delay for
restriction on the application of these sounder circuits.
1 Use a low-voltage, digital multimeter to check the
resistance across each of the sounder circuits:
i With the meter connected in reverse polarity (+ve to -ve and -ve to +ve) the reading should be 4k7.
ii With the multimeter connected to the circuit in normal polarity (+ve to +ve and -ve to -ve) the meter may
indicate a lower value. This is because of the forward-
biased diodes in series with the sounders.
2 If electronic sounders are used this test will not reveal
reversed devices. It is, therefore, recommended that
if the circuit appears correct the following is done:
i Remove the 4k7 resistors from the panel outputs.
ii Connect the circuit to the panel output while observing correct polarity.
iii If there are any reversed devices the panel will indicate a fault. Re-check circuit. Locate reversed sounder
wiring and correct. Panel fault indication will clear.
3 When the output circuits have been connected, they
may be tested by using the SOUNDERS START/
STOP pushbutton.
i Press the SOUNDERS START/ STOP pushbutton to activate the sounders.
ii Press the SOUNDERS START/ STOP pushbutton again to stop the activation of the sounders.
EN 54-2: 8.8 &
ISO 7240-2: 9.8
One output on the panel
must be configured as a fault output.
!
EN54
ISO 7240!
EN54
ISO
7240
EN 54-2 &
ISO 7240-2 7.7.1
One output on the panel must be configured as a fire output.
!
EN54
ISO 7240!
EN54
ISO
7240
EN 54-13:  5.3.4
Installations designed to meet EN 54-13 require
partial short and partial open fault warning. 
						

							997-492-000-6, Issue 6July 2011
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
23
6.9 Digital Inputs
Two digital input circuits are provided. Terminal block,
TB5, is provided on the Main PCB for these input circuits.
Each circuit is configurable, at access Level 3, as a
dedicated input function - refer to  Section 7.7 Digital
Inputs  for details.