Kidde FireBeta XT+ User manual

TM206 1 of 35 Issue 1.0
FireBeta XT+
Extinguishing Coincidence Unit
Part No’s: 23911-K086
Operation and
Maintenance Manual

TM206 2 of 35 Issue 1.0
TM206
Contents
1. Introduction 4
2. Safety 5
3. Mounting 5
4. Technical specification 7
5. Front panel layout 8
6. Removing the equipment chassis 9
7. System diagrams 10
8. Connecting to the circuit board 11
8.1 Sounder circuit wiring 11
8.2 Connecting to extinguishing output 12
8.2.1 Solenoid wiring 12
8.2.2 Igniting actuator wiring 12
8.3 Connecting to activation inputs 13
9. Setting up extinguishant monitoring circuit 14
10. Aux 24VDC supply outputs 14
11. Connection to relay contacts 15
11.1 Fault relay 15
11.2 1st stage alarm relay 15
11.3 2nd stage alarm relay 15
11.4 Released relay 16
11.5 Aborted relay 16
11.6 Extract relay 16
12. Connection and configuration of status units and ancillary boards 16
12.1 Adding new status units/ancillary boards 17
12.2 Removing status units/ancillary boards 18
13. Wiring to status units/ancillary boards 19
14. Configuration 20
14.1 Extinguishing output mode 20
14.2 Configuring the activation mode 20
14.3 Reset inhibit time 21
14.4 Pre-release delay timer 21
14.5 Extinguishing release time 22
14.6 2nd stage alarm pulsing/continuous 22
14.7 Released condition 22
14.8 Delay on manual release 23
14.9 Pre-release delay reset disabled 23
14.10 Release timer 24
14.11 R0V not removed on reset 24
14.12 Disable earth fault monitoring 25
14.13 Disable fault output 25
14.14 Invert low pressure switch input 25
14.15 Extinguishing output monitoring levels 26
15. Panel operation – access levels 1 & 2 27
15.1 Normal condition 27
15.2 Access level 2 27
15.2.1 Disable extinguishing release outputs 27
15.2.2 Disable manual release 27
15.2.3 Disable 1st stage output 28

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15.2.4 Disable 2nd stage output 28
15.2.5 Disable released output 28
15.2.6 Disable extract output 29
15.2.7 Turn on extract output 29
15.3 Single input activation 29
15.4 Double input activation 29
15.5 Reset 30
15.6 Sounder fault 30
15.7 Power fault 30
15.8 System fault 30
15.9 Lamp test 30
15.10 Hold condition 31
15.11 Released condition 31
15.12 Low pressure switch 31
15.13 Manual only mode 31
15.14 Manual release 31
15.15 Abort input 31
16. Internal controls 32
16.1 Watchdog reset 32
16.2 Processor reset 32
16.3 Terminate extinguishing 32
16.4 Write enable switch 32
17. Internal indications 33
17.1 Watchdog 33
17.2 System fuse 33
17.3 Man. Release 33
18. Power supply 33
19. Maintenance 34
20. CE Mark 34
21. Commissioning instructions 35

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1 Introduction
The FireBeta XT+ Extinguishant Coincidence Unit is designed in accordance with European standards
EN12094-1 Fixed fire fighting systems - Components for gas extinguishing systems - Part 1:
Requirements and test methods for electrical automatic control and delay devices.
The FireBeta XT+ ECU is a self contained extinguishing release control unit that can receive
activation signals at supervised inputs via volt free contacts from a fire detection control panel
or addressable output modules
The ECU has an integral, mains powered, EN54-4 compliant battery charger and power
supply.
In addition to the requirements of EN12094-1 the ECU has the following facilities:
…………Delay of extinguishing signal of up to 60 seconds. EN12094-1 Section 4.17
option with requirements.
…………Signal representing the flow of extinguishing agent to indicate the released
condition. EN12094-1 Section 4.18 option with requirements.
…………Monitoring of the status of components by way of a low pressure switch input.
EN12094-1 Section 4.19 option with requirements.
………….Emergency hold device to enable the extinguishing delay time to be
extended. EN12094-1 Section 4.20 option with requirements.
………….Control of flooding time to deactivate the releasing output after a set period of
time. EN12094-1 Section 4.21 option with requirements.
…………Manual only mode to disable the release of Extinguishing via
automatic detection devices. EN12094-1 Section 4.23 option with requirements.
…………Triggering of equipment outside the system by way of first and
second stage contacts, extract fan output etc. EN12094-1 Section 4.26 option with
requirements.
…………Activation of alarm devices with different signals to indicate pre-
discharge and released warnings using different sounds. EN12094-1 Section 4.30 option with
requirements.
……….Emergency Abort device to inhibit the extinguishing signal until the emergency abort
device has been deactivated and the panel has been reset. EN12094-1 Section 4.27 option with
requirements.

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2 Safety
Suppliers of articles for use at work are required under section 6 of the Health and Safety at
Work act 1974 to ensure as reasonably as is practical that the article will be safe and without
risk to health when properly used.
An article is not regarded as properly used if it is used ‘without regard to any relevant
information or advice’ relating to its use made available by the supplier.
This product should be installed, commissioned and maintained by trained service personnel
in accordance with the following:
(i) IEE regulations for electrical equipment in buildings
(ii) Codes of practice
(iii) Statutory requirements
(iv) Any instructions specifically advised by the manufacturer
According to the provisions of the Act you are therefore requested to take such steps as are
necessary to ensure that you make any appropriate information about this product available
to anyone concerned with its use.
This equipment is designed to operate from 230V 50Hz mains supplies and is of class 1
construction. As such it must be connected to a protective earth conductor in the fixed wiring
of the installation and a readily accessible double pole disconnect device meeting the
requirements of EN60950/IEC950 which disconnects live and neutral simultaneously shall be
incorporated in the fixed wiring. Switch disconnect devices such as MK Sentry 63A or similar
are suitable for this.
WARNING: Failure to ensure that all conductive accessible parts of this equipment are
adequately bonded to the protective earth will render the equipment unsafe.
This control panel is environmental class A and is designed for indoor use only at
temperatures between -50C (+/- 3) and +400C (+/- 2) and with a maximum relative humidity of
95%.
The IP rating for the enclosure is IP30.
Operation outside of these limits may render the equipment unsafe.
3 Mounting
The ECU should be mounted on a dry, flat surface, at eye height to the displays and in a level
position such that the enclosure is not distorted.
Screws or bolts of a minimum of 5mm diameter must be used to mount the enclosure in all
four mounting positions.
It should be positioned in an accessible place as agreed with the end user.
Suitable fixings should be used at all fixing points such that the unit is securely mounted and
is not liable to move once fixed.
The ECU should not be mounted in another enclosure or near sources of excessive heat.
Cables should be connected using suitable cable glands fitted to the knockouts provided. If
additional cable entry points are required, all swarf and debris caused by drilling of additional
cable entries must be cleared before power is applied to the panel.

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Cables should not be installed in the bottom of the enclosure. This space must be kept free
for batteries.
Side view Front view
5mm diameter screws
Fix to flat surface using suitable wall plugs

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4 Technical specification
Table 1 - Electrical specifications
ITEM ELECTRICAL RATING COMMENT COMMUNICATION
PARAMETERS
Mains supply 230V AC, 50Hz +10% - 15% (100 Watts maximum) Standard European mains
connection
Mains supply fuse T2A L250V Replace only with similar type
Power supply rating 4 Amps including battery charge 28V +/- 2V
Maximum ripple current 200 millivolts
Battery type (Yuasa NP) 2 x 12 Volt sealed lead acid in series
Battery charge voltage 27.6VDC nominal (temperature compensated) Modulated DC
Battery charge current 1,5A maximum Modulated DC
Current draw in mains fail condition 60 milliamps quiescent – 107 milliamps full alarm
Maximum current draw from
batteries 4 Amps With main power source disconnected
Aux 24V output Fused at 500mA with electronic fuse 200 milliamp maximum continuous load
1st and 2nd stage Sounder outputs 21 to 28V DC Fused at 1A with electronic fuse 1.0 Amp total load over all circuits Voltage reversing DC
Fault relay contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
Fire relay contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
First stage contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
Second stage contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
Extract contact rating 5 to 30VDC 1A Amp maximum for each Maximum ratings not to be exceeded Volt free changeover contact
Terminal capacity 0.5mm2to 2.5mm2 solid or stranded wire
Number of sounders per circuit Dependent on type and current consumption See table 2 for sounder types
Monitored input end of line 6K8 +/- 5% ½ Watt resistor Supplied in terminals
Sounder circuit end of line 10K +/- 5% ¼ Watt resistor Supplied in terminals
Extinguishing output end of line 1N4004 Diode Supplied in terminals
No. of sounder circuits (2) 21 to 28V DC 1 x 1st stage and 1 x 2nd stage
Extinguishing release outputs (2) 21 to 28V DC. Fused at 1 Amp 1 Amp maximum load –for 5 minutes
3 Amps for 20 milliseconds Voltage reversing DC with calibration facility
Extinguishing release delay Adjustable 0 to 60 seconds (+/- 10%) 5 second steps
Extinguishing release duration Adjustable 60 to 300 seconds 5 second steps
Cabling FP200 or equivalent (Maximum capacitance 1µF, max
inductance 1Mh) Metal cable glands must be used
Monitored inputs normal threshold
(Allowable EOL) 10K ohm to 2K ohm
Monitored inputs alarm threshold 2K ohms to 150 ohms +/-5%
Monitored inputs s/c threshold 140 ohms to 0 ohms +/-5%
Status unit/Ancillary board
connection Two wire RS485 connection (EIA-485 specification) Maximum of 7 units per area- RS485 data cable. (EIA-485 specification)
Status unit power output 21 to 28V DC, Fused at 500mA with electronic fuse 300 milliamp maximum load

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Table 2 - Compatible sounders
Model Type Manufacturer Comments
BANSHEE ELECTRONIC VIMPEX
WAFER ELECTRONIC VIMPEX
FIRECRYER RANGE ELECTRONIC VOICE VIMPEX
KOBELL MOTORISED VIMPEX
ASKARI ELECTRONIC FULLEON
ROSHNI ELECTRONIC FULLEON
SQUASHNI ELECTRONIC FULLEON
SYMPHONI ELECTRONIC FULLEON
ELECTRONIC BELL ELECTRONIC FULLEON
CFB BELLS MOTORISED FULLEON
B6 AND B8 BELLS SOLENOID FULLEON
5 Front panel layout

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6 Removing the equipment chassis
Open the control panel lid using the two 801 lock key.
Before the chassis can be removed it will be necessary to disconnect the power cables from the
connector terminal block on the left hand side of the PCB.
The chassis is held in place by two screws. Undo the two screws and lift the chassis gently away from
the box towards you.
With the chassis removed, there is much more room inside the panel for making off and dressing cables.
When cabling work is complete, the chassis can be re-fitted and the power cables reconnected.
Important! Ensure the power cables are connected correctly.

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7 System diagrams
Any number of ECU connected to addressable panel
Any number of ECU connected to conventional fire panel using zonal volt free contacts

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8 Connecting to the circuit board
All connections for field wiring are to rows of terminals along the top and bottom of the circuit board.
Shielded fire alarm cable such as FP200 and metal cable glands must be used for all connections to the
panel.
The shield of the cable must be bonded securely to the enclosure earth via a metal cable gland.
The resistance of any core of any cable must not exceed 25 ohms. The shield of the cable must be
bonded securely to the enclosure via the metal gland.
Wiring should enter the enclosure at the top or back of the panel using the knockouts provided and be
formed tidily to the appropriate terminals.
Terminals are capable of accepting wires of up to 2.5mm2.
Wiring must not go across the front of the circuit board. If cable entries need to be in positions other than
at the knockouts provided, wiring must be fed behind and well away from the surface of the circuit board.
The space at the bottom of the enclosure is largely occupied by the standby batteries so this must be
borne in mind when considering cable entries.
8.1 Sounder circuit wiring
All sounders must be of the polarised type. If non-polarised sounders are used the control panel will
permanently show a fault condition. See table 2 for a list of compatible sounder types.
Sounder circuits are monitored for open and short circuit faults by placing a 10K 0.25W end of line
monitoring resistor across the last device on the circuit.
Sounder circuits must be wired as a single, radial circuit with no spurs or T junctions to enable the
monitoring circuit to work correctly.
SOUNDER
OUTPUT
TERMINALS
+ IN
-IN
+ OUT
-OUT
POLARISED
SOUNDER
See manufacturers
details for detailed
connection information
See manufacturers
details for detailed
connection information
+ IN
-IN
+ OUT
-OUT
POLARISED
SOUNDER
10K end of
line resistor
Sounder circuit wiring through an MTL778ac I.S. barrier

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8.2 Connection to extinguishing output
The Extinguishing output is capable of supplying up to 1 Amp for the maximum duration to a solenoid or
3 Amps for 20 milliseconds to an igniting actuator or Metron.
The wiring for solenoids and igniting actuators is different as shown below. Igniting actuators of different
types or from different manufacturers should not be mixed on the same circuit.
8.2.1 Solenoid wiring
Solenoids must have a resistance of greater than 28 ohms to ensure that the maximum current rating of
the Extinguishing output is not exceeded.
Solenoids should be fitted with a suppression diode to prevent EMF generated by the solenoid when it
de-energises from upsetting the operation of the control panel.
Only polarised solenoids (i.e. solenoids fitted with an internal polarising diode) should be used.
Example of wiring a solenoid
8.2.2 Igniting actuator wiring
A maximum of four igniting actuators can be wired in series. If only one or two actuators are fitted, a 2R2,
2.5 Watt resistor must be wired in series with them to provide the correct monitoring resistance. The end
of line diode can be discarded when igniting actuators are used.
To guarantee firing under all conditions, the total resistance of actuators, monitoring resistor and cable
should not exceed 7 ohms.
+
-
M M M
3 OR 4 ACTUATORS
WIRED IN SERIES
(MAXIMUM OF 4)
EXTING
1 OR 2 ACTUATORS
WIRED IN SERIES
+
-
EXTING
M
M M FIT 2R2 2.5W RESISTOR
IN SERIES WITH
ACTUATORS IF ONLY 1 OR
2 ACTUATORS ARE USED

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8.3 Connecting to activation inputs
The ECU has two monitored activation inputs which can be used for activating the extinguishing system.
Each input must have 6k8 0.5W end of line resistor fitted (supplied in terminals) and be triggered by a
470R 1W resistor.
Wiring from volt free contacts from conventional fire panels or addressable modules are shown below.
Activation input 1 –
Volt free contact from addressable
module or conventional fire panel.
Activation input 2 –
Volt free contact from addressable
module or conventional fire panel.
470R 1 Watt Trigger resistor
6k8 0.5 Watt End of Line resistor

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9 Setting up extinguishing monitoring circuit
The extinguishing output circuit is factory set to monitor the end of line diode that is fitted to the terminals
and will normally show a value of around 270.
If the parameters of the Extinguishing output change e.g. by connecting a solenoid in parallel with the
monitoring diode or removing the diode and fitting igniting actuators, then the extinguishing output
monitoring level will need to be “learnt”. See section 14.16 for details. To do this, operate the ENABLE
CONTROLS keyswitch to put the system into access level 2.
The LCD will show:
Operate the WRITE ENABLE switch by gently sliding it to the right. The LCD will show:
Press the ENTER button and then the UP button repeatedly until the LCD displays:
The XXX displayed here is the previous (factory level) to which the monitoring level had been sent.
Press the ENTER button. The LCD will now show:
The XXX shown here is the current monitoring level detected on the extinguishing input. Press the
ENTER button to learn the new monitoring level.
Press the UP button to set the monitoring level for output 2 in the same way if it is being used, otherwise
switch the WRITE ENABLE slide switch to the left and check that an open or short circuit fault on the
extinguishing output(s) is detected and shown on the control panel.
10 Aux 24V DC supply output
The terminals for the Aux 24V supply are labelled Aux 24V + and ROV. The ROV terminal is the negative
terminal.
It is possible to have the Aux24V supply outputs removed for a few seconds when the panel is reset.
Aux 24V not removed upon reset is set as default on the ECU. To change this, switch the system to
access level 2 by operating the ENABLE CONTROL keyswitch and then operate the WRITE ENABLE
switch by gently sliding it to the left.
The LCD will show:
Press the ENTER button and then the UP repeatedly until the LCD displays:

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Press the ENTER button. The LCD will show:
Press the ENTER button. The LCD will show:
Press the exit button.
The Aux 24V supply outputs are fitted with an electronic, self resetting fuse rated at 0.5 Amps to protect
the control panel’s 24V supply in the event of a wiring fault.
Any standing load on the Aux 24V supply outputs must be taken into account when calculating battery
standby times. Standby times will be significantly affected by even modest standing loads on these
outputs. It is recommended that the Aux 24V outputs are NOT used to power standing loads.
Where the Aux 24V supply outputs are used to power electromechanical devices such as relays or door
retainers it is imperative that a suppression diode is fitted across the coil of the device to prevent the
generation of high voltage transients back to the control panel power supply.
11 Connection to relay contacts
Volt free changeover relay contacts are provided for local control and signalling if required. These
contacts are rated for switching signalling circuits only and the maximum ratings listed in Table 1 –
Electrical specifications, should not be exceeded under any circumstances.
Typically, the Aux 24V output of the control panel is switched through these relays and used to control
other systems.
11.1 Fault relay
The fault relay is normally energised and will de-energise upon any fault condition on the detection part
or the extinguishing part of the control panel including total loss of power.
11.2 1st stage alarm relay
The first stage alarm relay will operate upon activation of one of the two monitored activation inputs and
will de-activate only when the panel is reset.
This relay will also operate upon activation of the panel mounted or remote manual release switch.
The stage 1 relay output can be disabled at access level 2 via the menus on the ECU.
11.3 2nd stage alarm relay
Second stage alarm relays will operate when the panel enters the activated condition (i.e. the release
countdown timer has started) and will de-activate only when the panel has been reset from the released
condition.
The stage 2 relay output can be disabled at access level 2 via the menus on the ECU.

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11.4 Released relay
The released relay will operate when the module enters the released condition, triggered by activation of
the monitored activation inputs. The released relay will also operate if the panel enters the released
condition via the released pressure switch input.
The Released relay can be disabled at access level 2 via the menus on the ECU.
11.5 Abort relay
The Abort relay will operate when the panel is in the aborted condition, activated via an abort switch
input.
11.6 Extract relay
The extract relay will operate when selected at access level 2. This provides a means to vent a room of
extinguishing gases but prevents the gases from being vented during a discharge.
To switch on the extract relay, operate the ENABLE CONTROL keyswitch and then press ENTER on the
ECU on which the required extract relay is fitted.
The LCD will show:
Press the DOWN button until the display shows:
Press ENTER to turn the extract output on.
The LCD will change to the following:
Pressing ENTER again will turn the extract off.
12 Connection and configuration of Status indicators and Ancillary boards
Important!
The ECU should not be powered during the connection of status indicators or ancillary boards.
Status indicators and ancillary boards require a four-wire connection from the associated ECU to the
corresponding data and power, in and out terminals. Two of the cables carry power to the units (24V)
and the other two carry data.
A four core cable suitable for carrying RS485 data should be used. If this is a twisted pair cable then one
twisted pair should be used for the data connections and the second pair used for the power
connections.
Each status indicator and ancillary board has a 3-bit DIL switch and must be allocated a unique address
between 1 and 7.
The ECU is able to distinguish between status indicators and ancillary boards so it is possible to have a
status indicator set to address 1 and an ancillary board set to address 1 if desired.

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ADDRESS SWITCH POSITIONS
1
2
3
4
5
6
7
The address switch is located on the bottom left hand corner of the status indicator or ancillary PCB.
Note:
The address is only read when the boards are first powered or if the processor reset switch on the
ancillary board or status indicator is pressed, so address switches should not be altered on a system that
has power applied.
It is important that each individual status indicator and each ancillary board is allocated a unique address
in the range 1 to 7. Units of the same type with the same address will cause intermittent faults to be
displayed.
NOTE:
10 lamp status indicators (Part no’s 23911-K077, 23911-K078 and 23911-K082) are not compatible with
FireBeta XT+ ECU.
12.1 Adding new Status indicators/Ancillary boards
When the system is powered, it will search for connected status indicators and/or ancillary boards
connected to ECU.
If status indicators or ancillary boards are fitted and detected by the ECU, the LCD will display:
X = the number of faults
Press ENTER on the module to which the status indicators or ancillary boards are connected with the
ENABLE CONTROL switch keyswitch off and use the UP button on the module to view the faults. If
status indicators and/or ancillary boards are detected the LCD will display:
X = the address of the status unit found
Or
X = the address of the ancillary board found

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To accept the status indicators and/or ancillary boards found, turn the ENABLE CONTROL keyswitch on
and slide the WRITE ENABLE switch on the module to which the status indicators or ancillary boards
are connected gently to the left.
The LCD will then display:
X = the address of the status unit found
Or
X = the address of the ancillary board found
When the ENTER button is pressed on the module to which the status indicators or ancillary boards are
connected, the selected status indicator or ancillary board will be added to the system and the next unit
to be added will be displayed. Press the ENTER button on the ECU until all of the units have been
accepted then gently slide the WRITE ENABLE switch on the module to the right.
All of the status indicators and ancillary boards found by the ECU have now been added and
disconnection of any of them will be displayed as a fault on the ECU. If any status indicators are
disconnected, a HOLD activated indication will also be displayed on the ECU and all ancillary boards or
status indicators that remain connected.
With the ENABLE CONTROLS keyswitch off, the LCD will display:
When additional status indicators or ancillary boards are added to the system, these will be shown on the
LCD of the ECU when the system is powered up or the processor reset switch is pressed on the module
to which the status indicators or ancillary board is connected and can be added to the system by
following the procedure above.
12.2 Removing Status indicators/Ancillary boards
If a status indicator or ancillary board needs to be removed from the system, disconnect the status
indicator or ancillary board taking care not to short power supply or data cables. The ECU will display:
Press the processor reset button on the ECU, when the ECU has re-started, it will display:
X = the address of the disconnected status indicator.
Or

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X = the address of the disconnected ancillary board.
Turn the ENABLE CONTROLS keyswitch on and gently slide the WRITE ENABLE switch to the left.
The LCD will then display:
X = the address of the remaining status indicators
X = the address of the remaining ancillary boards
When the ENTER button is pressed on the module to which the status indicators or ancillary boards are
connected, the selected status indicator or ancillary board will be added to the system and the next unit
to be added will be displayed. Press the ENTER button on the ECU until all of the units have been
accepted then gently slide the WRITE ENABLE on the ECU switch to the right.
Full details of status units and ancillary boards can be found in TM202, TM203 and TM205.
13 Wiring to status units and ancillary boards
The ECU has terminals for data and power connections to FireBeta XT status indicator units and/or
ancillary boards. These terminals are labelled STATUS SERIAL and STATUS POWER. It is important to
wire these terminals with the correct polarity for both the serial data and power wiring.
FireBeta XT+ ECU
To next ancillary
board/Status
indicator

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Up to seven status indicators and seven ancillary boards can be connected to each ECU. Consideration
must be given to the power consumption of status units and ancillary boards when calculating the
standby battery requirements for the ECU.
The last status unit or ancillary board connected to the ECU must have a terminating link fitted.
Terminating links must be removed from all preceding status units and ancillary boards.
For details of link settings and location, refer to manuals TM203 and TM205.
14 Configuring the ECU
14.1 Extinguishing output mode
The FireBeta XT+ ECU has two extinguishing outputs. These can be configured to operate together at
the same time (common) or be configured as main and reserve outputs.
The factory default setting for the extinguishing outputs is common.
To change this, switch on the ENABLE CONTROL keyswitch and slide the WRITE ENABLE switch on
the module to be configured gently to the left. Press the ENTER button on the ECU. The display will
show:
Press the ENTER button and the display will show:
Press the ENTER button to select main/reserve.
To save the settings, slide the WRITE ENABLE switch gently to the right.
When the ECU is activated, only extinguishing output 1 operate.
There is an additional menu item at access level 2 to allow the reserve extinguishing output to be
selected.
14.2 Activation mode
It is possible to configure the ECU to be activated by coincidence i.e. any 2 zones from a range of zones
or a single zone from a range of zones. The activation mode is factory set to coincidence.
To change this, switch on the ENABLE CONTROLS keyswitch and slide the WRITE ENABLE switch on
the module to be configured gently to the left. Press the ENTER button on the ECU then press the UP
button. The display will show:
Press the ENTER button and the display will show:
Press the ENTER button to select single zone activation mode.