S&S Northern Merlin 1000S User manual

Merlin 1000S User Guide
Rev: 07 05-19 1
Gas Safety Products
Merlin 1000S
Gas Proving & Detection System
User Guide
Please read this guide carefully and retain for future use.

Merlin 1000S User Guide
Rev: 07 05-19 2
Table of contents
1General Information..........................................................................................3
1.1 Panel Mounting.............................................................................................................3
2Circuit Board Terminals .....................................................................................4
2.1 POWER ...........................................................................................................................4
2.2 GAS VALVE ....................................................................................................................4
2.3 BMS OUT .........................................................................................................................4
2.4 PRESSURE SENSOR .........................................................................................................4
2.5 EM REMOTE....................................................................................................................5
2.6 GAS DETECTOR..............................................................................................................5
2.7 FS 1/2/3/4 .......................................................................................................................5
2.8 CO2 MONITOR ..............................................................................................................5
2.9 12v DC............................................................................................................................5
3Installation & Operation ....................................................................................6
3.1 System On and Off .......................................................................................................6
3.2 Emergency Shut Off .....................................................................................................6
3.3 BMS Integration .............................................................................................................6
3.4 Auto shut-down / Timeout facility...............................................................................6
3.5 Fire Alarm Integration...................................................................................................7
3.6 Fan switch integration..................................................................................................7
3.7 Auto reset ......................................................................................................................7
3.8 Gas fill and prove time.................................................................................................7
4Panel LED status.................................................................................................8
5Maintenance .....................................................................................................9
61000S Wiring Spec ...........................................................................................10
7Manufacturer’s Warranty ................................................................................12

Merlin 1000S User Guide
Rev: 07 05-19 3
1General Information
The Merlin 1000S is a gas proving and detection system.
The system comprises of a control panel and a gas pressure sensor. The Merlin 1000S can
receive connections from remote emergency shut-off buttons, gas detectors and a CO2
monitor. It can also be integrated with a BMS and fire alarm.
It is recommended that the user reads this guide before using the system. Please do NOT
attempt to operate the unit until the contents of this document have been read and are
thoroughly understood.
1.1 Panel Mounting
The control panel is designed for surface mounting using 4 mounting screws. Removing the
cover on the panel gives access to the circuit board. The PCB should be removed before
drilling entry holes into the case.
Important Warning Statements
Never ignore your device when in alarm.
This device requires a continual supply of electrical power –it will not work without power.
This device should not be used to substitute proper installation, use and/or maintenance of fuel burning
appliances including appropriate ventilation and exhaust systems.
Your product should reach you in perfect condition, if you suspect it is damaged, contact your supplier.
Information on waste disposal for consumers of electrical & electronic equipment. (EEE)
When this product has reached the end of its life it must be treated as Waste Electrical & Electronics Equipment
(WEEE). Any WEEE marked products must not be mixed with general household waste, but kept separate for
the treatment, recovery and recycling of the materials used.
Please contact your supplier or local authority for details of recycling schemes in your area.

Merlin 1000S User Guide
Rev: 07 05-19 4
2Circuit Board Terminals
2.1 POWER
A 110-240VAC electrical supply should be externally fused at 3A
and connected to the terminals marked [POWER LNE].
2.2 GAS VALVE
The 110-240VAC gas solenoid valve should be powered using
the terminals on the Merlin 1000S detailed [GAS VALVE LNE].
2.3 BMS OUT
Terminal connections are available on the circuit board for Building
Management systems etc.
Detailed on the circuit board as [BMS OUT - N/C, COM and N/O]
(Normally Closed / Common / Normally Open).
These are volt free connections.
This is a relay that changes state in alarm or when the gas is on/off and can be used in
conjunction with the 12vDC output and other external relays that affect other devices and
controls such as purge fans and audible alarms etc.
2.4 PRESSURE SENSOR
This terminal is connected to the gas pressure transducer as shown which
is then screwed into the downstream port on the gas solenoid valve.
Min Operating Pressure = 12mbar
Max Operating Pressure = 100mbar
ENSURE THIS IS SCREWED TO THE DOWNSTREAM PORT OF THE GAS SOLENOID VALVE.

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Rev: 07 05-19 5
2.5 EM REMOTE
This terminal is for remote emergency shut-off buttons and detailed on the
circuit board as [EM REMOTE].
This is linked out as a factory setting.
Remote emergency shut-off buttons should be volt free and wired to the
Merlin 1000S.
2.6 GAS DETECTOR
These connections can be wired to a Merlin gas detector (LPG,
natural gas or carbon monoxide) as shown.
If no detector is being used leave the link in between the “ ”.
Refer to your detector guide for more information.
2.7 FS 1/2/3/4
This terminal switches when the key is turned on and off.
This can be linked to a fan switch (supplied separately) which can provide
power to the fans when the control panel is switched on.
2.8 CO2 MONITOR
This terminal can be connected to a CO2monitor to shut off the system in
the event of a high concentration of CO2.
If no CO2 monitor is connected, the panel will ‘beep’ upon power up and
the CO2 LED will flash 3 times to indicate that this terminal has been
disabled.
Refer to your CO2monitor guide for further information.
2.9 12v DC
This is a permanent 12v DC output when there is power at the panel and
can be used to create a relay switch with the BMS relay output.
Contact your supplier for more information.

Merlin 1000S User Guide
Rev: 07 05-19 6
3Installation & Operation
3.1 System On and Off
Turn off all open appliances and turn the key switch to on position.
To switch the system off, turn the key switch to off position.
3.2 Emergency Shut Off
The emergency shut off button is located on the front of the panel.
There is also a facility for remote shut off buttons to be wired in series on the circuit board.
The emergency shut off button(s) will cut off the gas supply when activated.
To reinstate the system, the emergency shut off button(s) will need to be reset and the panel
restarted.
3.3 BMS Integration
The Merlin 1000S can be integrated with a BMS to make or break a circuit on
gas on/gas off, (valve open or valve closed).
This will tell the BMS whether or not power is being sent to the solenoid.
There is a dip-switch located on the inside facia of the panel labelled [BMS
SEL]. This is factory set to ‘OFF’ which signals the BMS on gas on/gas off.
When switched to ‘ON’, the 1000S will only signal the BMS on a fault, i.e. high
CO2 level detected, gas detected, emergency stop pressed, etc.
3.4 Auto shut-down / Timeout facility
The Merlin 1000S has an auto-shut down feature after a selected time.
There are two dip-switches located on the inside facia of the panel labelled
[TIME1] & [TIME2].
Upon installation, these can be configured to select the required timeout/
shut-down period.
TIME 1
TIME 2
Timeout Period (Hours)
OFF
OFF
2
ON
OFF
4
OFF
ON
8
ON
ON
Disabled
They are factory set to ‘OFF’ for a 2 hour timeout.
NOTE: Upon timeout/auto-shut down the gas supply will be turned off.

Merlin 1000S User Guide
Rev: 07 05-19 7
3.5 Fire Alarm Integration
The Merlin 1000S can be integrated with a fire alarm to close the gas supply automatically in
the event of a fire.
The volt free fire alarm signal can be wired in series with any remote emergency shut off
buttons. If there are no remote emergency stop buttons being installed, wire this directly to the
1000S terminal marked [EM REMOTE].
3.6 Fan switch integration
There is the facility to connect a Fan Switch (FS1 or FS2 sold separately).
The Fan Switch provides the facility to turn on the fan(s) when the key switch on the Merlin
1000S is ‘ON’ and turns the power off to the fan(s) when the key switch on the Merlin 1000S is in
the OFF position. There is a dip-switch located inside the facia of the Merlin
1000S labelled [EM SEL].
This is factory set to ‘OFF’ which instructs the 1000S to shut down the fan(s)
and gas supply on activation of the emergency shut off button(s).
Upon installation, this can be switched to ‘ON’ - this will instruct the system to
leave the fans on and only shut off the gas supply on activation of the
Emergency shut off button(s).
Note: This option is not available if Fan Switch is not installed.
3.7 Auto reset
The Merlin 1000S has an auto reset feature.
There is a dip-switch located on the inside facia of the Merlin 1000S labelled
[AUTO RESET]. This is factory set to ‘OFF’. When the power is restored after the
power cut, the panel has to be restarted manually.
Upon installation, this can be switched to ‘ON’ if required - this will instruct
the system to restart automatically when power is restored after the power
cut.
3.8 Gas fill and prove time
Gas fill and prove times are adjustable.
There are two dip-switches located on the inside facia of the Merlin 1000S labelled [FILL TIME]
and [PROVE TIME]. They are factory set to ‘OFF’.
FILL TIME is the amount of time the gas valve is open to fill the gas line.
Off –5 seconds
On –10 seconds
PROVE TIME is the amount of time the system tests the gas line for any leaks.
Off –30 seconds
On –50 seconds
Once the settings have been changed please remove mains power for 10 seconds.

Merlin 1000S User Guide
Rev: 07 05-19 8
4Panel LED status
When the system is connected to the mains supply, the Red LED of the S&S Logo located in the
bottom right corner of the panel will illuminate. When no power is present, this LED will not light
up.
Gas On
When the key switch is turned on, the Merlin 1000S will check the installation for gas leaks. If gas
proving is successful, the gas valve will open and the ‘Gas On’ LED will illuminate.
ON = Gas On
OFF = Gas Off
Testing
This LED will illuminate GREEN for approximately 30 seconds when the panel is checking the
integrity of the gas installation upon start up.
ON = proving the gas line, do NOT operate any appliances.
Test Fail
Under normal working conditions this LED is off. When the panel detects a gas leak on start-up,
the LED will illuminate AMBER. Gas valve will remain closed.
OFF = OK
ON = gas proving failed.
Pressure Low
Under normal working conditions the LED is off. The LED will illuminate AMBER when pressure of
the gas supply drops below 0.17psi for 10 secs. The gas valve will close.
OFF = OK
ON = gas supply pressure low.

Merlin 1000S User Guide
Rev: 07 05-19 9
Timeout
Under normal working conditions this LED is off. This LED will illuminate AMBER when auto-shut
down has occurred.
OFF = OK
ON = auto-shut down
EM Stop
If an emergency shut off button (either remote or on the panel) is pressed, the LED will
illuminate AMBER and the gas will be turned off. The EM Stop button must be re-set before
restarting the system.
OFF = OK
ON = EM Stop button pressed.
Gas Detected
Under normal working conditions this LED is off. If the external Merlin detector connected
detects gas this will show RED and the Gas valve will turn off.
OFF = OK
ON = Gas detected.
CO2High
Under normal working conditions this LED is off. If the concentration of CO2 in the air is at alarm
level (relevant detector required), the LED will show RED and the Gas valve will turn off.
OFF = OK
ON = the concentration of CO2 is at alarm level.
5Maintenance
To keep your panel in good working order, you must follow these steps:
DO carefully remove any accumulated dust from the outer enclosure once a month.
NEVER use detergents or solvents to clean your device –this may permenantly or temporarily
damage the panel
NEVER spray air fresheners, hair spray, paint or other aerosols near the device.
NEVER paint the device. Paint will seal vents and interfere with the device.

Merlin 1000S User Guide
Rev: 07 05-19 10
61000S Wiring Spec
1. POWER: Mains Input 110-240VAC Single Phase.
2. GAS VALVE: Gas Solenoid Valve Power Output, 110-240VAC, Max 3A.
3. ELECTRIC CONTACTOR: Disabled on this system.
4. WATER VALVE: Disabled on this system.
5. SUPPLY FAN PD SWITCHES: Disabled on this system.
6. EXTRACT FAN PD SWITCHES: Disabled on this system.
7. BMS OUT: Normally Closed, Common and Normally Open.
8. PRESSURE SENSOR: Gas pressure transducer, power supply and returned signal (supplied).
9. EM REMOTE: Remote emergency stop buttons and Fire Alarm input wired in series
(purchased separately). VOLT FREE INPUT
10. GAS DETECTOR: Power supply and VOLT FREE INPUT (detectors purchased separately).
11. FS 1/ 2/ 3: Fan Switch output (purchased separately).
12. CO2 MONITOR: (purchased separately). VOLT FREE INPUT
13. 12VDC: Permanent output when there is power at the panel. 50mA max
1
2
L
N
E
Gas Valve
Pressure
Transducer
EM
Stop
CO2
Monitor
Gas
Detector
3
4
5 6 7 8 9 10 11 12 13

Merlin 1000S User Guide
Rev: 07 05-19 11

Merlin 1000S User Guide
Rev: 07 05-19 12
7Manufacturer’s Warranty
3 Year Limited Warranty
Warranty coverage: The manufacturer warrants to the original consumer purchaser, that this product will be free of
defects in material and workmanship for a period of three (3) years from date of purchase. The manufacturer’s liability
hereunder is limited to replacement of the product with repaired product at the discretion of the manufacture. This
warranty is void if the product has been damaged by accident, unreasonable use, neglect, tampering or other causes
not arising from defects in material or workmanship. This warranty extends to the original consumer purchaser of the
product only.
Warranty disclaimers: Any implied warranties arising out of this sale, including but not limited to the implied warranties of
description, merchantability and intended operational purpose, are limited in duration to the above warranty period. In
no event shall the manufacturer be liable for loss of use of this product or for any indirect, special, incidental or
consequential damages, or costs, or expenses incurred by the consumer or any other user of this product, whether due
to a breach of contract, negligence, strict liability in tort or otherwise. The manufacturer shall have no liability for any
personal injury, property damage or any special, incidental, contingent or consequential damage of any kind resulting
from gas leakage, fire or explosion. This warranty does not affect your statutory rights.
Warranty Performance: During the above warranty period, your product will be replaced with a comparable product if
the defective product is returned together with proof of purchase date. The replacement product will be in warranty for
the remainder of the original warranty period or for six months –whichever is the greatest.
CONTACT US:
S&S Northern Head Office
Tel: [phone]
Fax: [phone]
www.snsnorthern.com
[e-mail]
South East Division
Tel: [phone]
Fax: [phone]
[e-mail]
S&S Northern is the owner of this document and reserves all rights of modification without prior notice.