S&S Northern Merlin 1000VW+ User manual

Installation & Operation Manual Merlin 1000VW+
1000VW+ IOM Rev: 05 01-20 1
Merlin 1000VW+
Gas, Electric and Water Isolation Controller with Ventilation Interlocking

Installation & Operation Manual
Please read this manual carefully and retain for future use.
The Merlin 1000VW+ gas pressure proving, electric and water isolation system is designed
specifically for use in educational buildings and Laboratories with ventilation interlocking
between the ventilation system and the gas solenoid valve. The system is compatible with both
current monitors and air pressure differential switches in order to interlock with up to two fans.
The system is designed to give full control over incoming gas supply, bench electrics and
water services with the lockable main key-switch and touch sensors.

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Contents
INSTALLATION ...........................................................................................3
Planning........................................................................................................................... 3
Fixing - Mounting............................................................................................................ 3
Typical Installation Arrangement ............................................................................... 4
Terminal Connections................................................................................................... 4
Switch Settings................................................................................................................ 7
Specification .................................................................................................................. 9
OPERATION ..............................................................................................10
First Power Up ............................................................................................................... 10
Emergency Shut Off Button ....................................................................................... 10
LED Indicators............................................................................................................... 10
Servicing & General Maintenance .......................................................................... 12
Bump Testing ................................................................................................................ 12
IMPORTANT WARNING STATEMENTS ...................................................13
Manufacturer’s Warranty........................................................................................... 13
Installation Details........................................................................................................ 16

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INSTALLATION
Planning
The Merlin 1000VW+ gas pressure proving, electric and water isolation system is designed
specifically for use in educational buildings and Laboratories with ventilation interlocking
between the ventilation system and the gas solenoid valve. The system is compatible with both
current monitors and air pressure differential switches in order to interlock with up to two fans.
This panel is to be used to carry out a gas proving test on the pipe work in order to highlight if
there is a gas appliance open or a gas leak in the laboratory. The Merlin 1000VW+ is designed
to give the teacher full control over the incoming gas supply, bench electrics and water
supply with the lockable main key-switch and touch sensors.
The Merlin 1000VW+ can work in conjunction with carbon dioxide, natural gas, carbon
monoxide and LPG sensors. The Merlin 1000VW+ also has a built in “timeout” facility which will
automatically shut off the gas solenoid valve at the end of a specific time period, this time
period can be adjusted to 2, 5, 8 hours or can be overridden if required.
Placing the panel at eye level allows for optimum monitoring of the LED indicators.
Fixing - Mounting
Unpack all the parts!
1. Carefully remove the front cover from the unit by unscrewing the four bolts located at each
corner. To do this –use the socket wrench provided.
2. Mark the four screw holes located on the back of the enclosure to the wall. Ensure the wall
surface is flat to prevent base distortion.
3. After executing the mounting and the connections –replace the front cover and insert the
security caps over the four bolts.
Please refer to your detector manual for important information regarding coverage,
location and positioning including areas and conditions to avoid.
Be careful when creating access for cables –Damage to boards will void any warranty.
Carefully remove the circuit board before drilling cable entry holes.

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Typical Installation Arrangement
Terminal Connections
1. POWER / LINE IN
100-240V AC Power should be supplied to the [POWER / LINE IN] terminal and fused at 3A.
On connecting the mains supply to the panel the power LED indicator will light up –this is
located on the front cover (S&S Northern Logo).
2. GAS SOLENOID VALVE OUTPUT
100-240V AC electrical power supplied from the [VALVE OUT] connector using a 3 core cable
can be connected to a gas solenoid valve which can shut the gas supply on alarm status.
Pressure sensors should be screwed to the downstream port of the valve.
Refer to your valve manual for more information and wiring!

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3. ELECTRIC CONTACTOR OUTPUT
100-240V AC electrical power supplied from the [ELECTRIC CONTACTOR] connector using a 3
core cable can be connected to a contactor.
Refer to your contactor manual for more information and wiring!
4. WATER VALVE OUTPUT
100-240V AC electrical power supplied from the [WATER VALVE] connector using a 3 core
cable can be connected to a contactor.
Refer to your water valve manual for more information and wiring!
5. BMS OUTPUT
Connections are available on the board for Building Management Systems.
[NO Normally Open] [COM Common] [NC Normally Closed]
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 12V DC output and other external relays that affect other devices and
controls such as purge fans and audible alarms etc.
See section; Switch Settings - for BMS options
6. PRESSURE SENSOR
The pressure sensor is wired to the [PRESSURE SENSOR] connector and screwed into the
downstream port of the gas solenoid valve.
Connect the pressure sensor as shown:
Red [+] Black [-] Blue [IN]
The sensor will monitor the gas supply pressure and if pressure drops below 12mBar –
the gas valve will close as this could mean a gas leak is present.
The pressure sensor operating pressure is: 0 –100mBar.
Screw the pressure sensor into the downstream port of your gas solenoid valve.

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7. EM REMOTE
Connections for remote emergency shut-off or stop buttons is detailed on the circuit board as
[EM REMOTE]. This is linked out as a factory setting.
8. GAS DETECTOR & CO2 MONITOR
Connections can be made for a Merlin gas detector (LPG, NG, CO or Hydrogen).
If no detector is being used leave the factory fitted link in.
A wiring example for a gas detector is shown.
Refer to your gas detector manual for further information.
CO2MONITOR.
To connect a CO2 monitor and gas detector –wire in series and power the CO2 monitor via
external mains power supply. Refer to your CO2 monitor manual for further information.
9. FAN SWITCHES
This terminal switches when the key is turned on and off.
This can be connected to a fan switch (supplied separately) which can provide power to fans
when the control panel is switched on.
10. PD SWITCHES / CURRENT MONITORS
This terminal is used to receive an input signal from external air pressure switches or current
monitors. This terminal is linked out as a factory setting.
Wiring to external air pressure switches or current monitors should made using a two core cable.
This is a volt free connection.
11. 12V DC
This is a power output for external auxiliary devices when there is power at the panel and can
be used to create a relay switch with the BMS relay output.
Max output: 50mA

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Switch Settings
There are various dip-switches on the front circuit board that can be adjusted to configure your
system as per the following.
Auto Reset
There is a switch located on the circuit board labelled [AUTO RESET].
OFF
When power is restored after the power cut/ loss, the panel has to be
restarted manually. (Default)
ON
This will instruct the system to restart automatically when power is
restored after power cut/loss.
Building Management System Integration
There is a dip-switch located on the circuit board labelled [BMS SEL].
The panel can be integrated with a BMS to make or break a circuit when the gas is either on or
off, (valve open or valve closed). This will tell the BMS whether or not power is being
sent to the solenoid valve.
OFF
Signals the BMS when gas is on or gas is off. (Default)
ON
Signals the BMS on a fault, i.e. high gas levels detected, emergency
shut-off activated, etc.
Fan Switch Integration
There is the facility to connect a Fan Switch.
A fan switch (Merlin FS1 or FS2 - sold separately) provides the facility to turn on fan(s) when the
1000VW+ panel is switched on and removes power to fan(s) when the switched off.
There is a switch located on the circuit board labelled [EM SEL].
OFF
Instructs the system to shut down fan(s) and gas supply upon
activation of emergency shut off button(s). (Default)
ON
Instructs the system to leave the fans on and shut off the gas supply
only upon activation of emergency shut off button(s).
Note: This option is not available if a Fan Switch is not installed.

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Gas Fill Time and Prove Time
FILL TIME: Amount of time the gas valve opens to fill the gas line on power up or reset.
PROVE TIME: Amount of time the system tests the gas line for leaks on power up or reset.
There are two switches located on the circuit board labelled [FILL TIME] and [PROVE TIME].
FILL TIME
PROVE TIME
OFF
5 Seconds (Default)
OFF
30 Seconds (Default)
ON
10 Seconds
ON
50 Seconds
Once the settings have been changed - remove power for 10 seconds.
Fire Panel Integration
The Merlin 1000VW+ 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 shut off buttons being installed, wire this directly to the
terminal marked [EM REMOTE].
Auto Shut-Down - Timeout Period
The system has an auto-shut down feature after a selected time.
There are two switches located on the circuit board labelled [TIME1] & [TIME2].
These can be configured to select the required timeout/ shut-down period.
TIME 1
TIME 2
Timeout Period
OFF
OFF
2 Hours (Default)
ON
OFF
4 Hours
OFF
ON
8 Hours
ON
ON
Disabled
Note: Upon timeout the gas supply will be turned off unless other utilities are configured.

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Auto Shut-Down –Selectable Utility
There are two switches located on the circuit board labelled [ELECTR] and [WATER].
They are factory set to ‘Off’.
On installation, they can be switched ‘On’ - This will instruct the system to also turn off
Electric and/or Water services when performing auto-shut down/ timeout.
Specification
Model:
1000VW+
Visual Indication
LED
Mains Electrical Power Input
100-240VAC
Gas Solenoid Valve Output
100-240VAC
Electrical Contactor Output
100-240V AC
Water Solenoid Valve Output
100-240V AC
Current Consumption
48W max (fully loaded)
Internal Fuse
3.15A
Operating Temperature
0 –40°C 0-95%RH Non-Condensing
Audible Alarm Buzzer dB
65 dB (300mm distance in quiet conditions)
Pressure Sensor Operating Pressure
0 -100mBar
Internet connection
N/A
Housing Material
Polylac PA-765
Flame Rating
UL 94
Approvals
CE, RoHS
O/All Dimensions (H x W x D) mm
178 x 254 x 62

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OPERATION
First Power Up
On connecting mains power, an LED on the front of the panel (S&S Logo) will illuminate red.
1. Turn the key switch to on position.
2. Gas, Electric & Water will flash for 10 seconds.
3. Press relevant service button to turn required utility on.
Turn the key switch to the off position to turn the panel off.
Note: All services can be turned on or off within 10 seconds only of the key switch being turned
on. After 10 seconds, all utility buttons will be disabled.
The user must turn the key off and back on to adjust any services.
Emergency Shut Off Button
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 and electrics only when activated.
To reinstate the system, the emergency shut off button(s) will need to be reset and the panel
restarted.
LED Indicators
Gas
When the key switch is turned on, the system will
check the installation for gas leaks.
If gas proving is successful, the LED will illuminate.
ON = Gas On
OFF = Gas Off
Electric
When Electric service is turned on, the Electric LED
will illuminate.
ON = Electric On
FLASHING = Electric Off, Electric button enabled
OFF = Electric Off, Electric button disabled.
Water
When water service is turned on, the Water LED will illuminate.
ON = Water On
FLASHING = Water Off, Water button enabled
OFF = Water Off, Water button disabled.

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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 12mBar for 10 secs.
The gas valve will close.
OFF = OK
ON = gas supply pressure low.
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 activated
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 reset before restarting the system.
OFF = OK
ON = Emergency Shut-Off button activated.
CO2/ 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.
Fan Fault
Under normal working conditions this LED is off. If a fan fault is identified for longer than 10
seconds the LED will show RED and the Gas valve will turn off. Fan fault will only identify when
the gas is on only.
OFF = OK
ON = Gas supply has been shut off due to a ventilation fault.

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Servicing & General Maintenance
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 gas sensing elements.
NEVER spray lighter gas, paint or other aerosols near detectors or monitors.
NEVER paint the device. Paint will seal vents and may interfere with the device.
Bump Testing
What is bump testing?
‘Bump testing’ is a term used for checking a gas detector is functioning correctly by exposing it
to the target gas. A known concentration of the target gas is applied to the sensor to trigger an
alarm condition and ascertain the detector is working safely.
Why is it important?
A detector may visually appear in good order, but its sensitivity can be inhibited by external
factors. Dust, humidity, temperature fluctuations, cleaning products, contaminants or sensor
drift (ageing) can cause a decline in sensitivity and eventual failure. Regular ‘bump tests’ are
important to make sure the detector is able to detect a release of gas as early as possible.
How often?
A ‘bump test’ takes seconds and is often completed alongside a scheduled fire alarm test. We
recommend this is done at least weekly to reduce the risk of a detector not performing,
however the frequency should be determined from a risk assessment by the end user.
Please remember, ‘bump testing’ does not remove the need to have gas detectors inspected,
calibrated and serviced periodically by a trained engineer.
For more help and advice on bump testing, calibration and service –contact us.
It is recommended that any detectors connected to the system are inspected and serviced
at least annually from the date of installation for optimum performance and protection.
Avoid exposure of high concentrations of alcohol found in many products, this can damage,
deteriorate or affect gas detectors. For more information refer to your detector manual.

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IMPORTANT WARNING STATEMENTS
Please take the time to thoroughly read this user’s guide which should be retained for future reference.
It is recommended that this device be commissioned upon installation.
Do not apply lighter gas or other aerosols to detectors –this will cause extreme damage to the gas sensing elements.
High concentrations of alcohol found in many products may damage, deteriorate or affect the gas sensing elements
of the detectors –Avoid exposure near your devices.
Never ignore your devices when in alarm. Actuation of your alarm indicates the presence of an error or issue that
requires immediate attention.
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.
Manufacturer’s Warranty
3 Year Manufacturer’s 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 lia ble 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.
Information on waste disposal for consumers of electrical & electronic equipment.
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.

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Notes

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Notes

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Installation Details
Please pass this manual to the system owner or system user.
Date of Installation:
Installation Location:
Organisation:
Stamp/ Signature of the installer:


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.