S&S Northern Merlin 1000BH Owner's manual

Installation & Operation Manual Merlin 1000BH
Rev: 09 03-21 1
MERLIN 1000BH
Gas Proving & Gas Detection System

Installation, Operation & Maintenance
Please read this manual carefully and retain for future use.
The information contained within this manual should be referenced for typical installation and operation only.
For specific requirements that may deviate from the information in this guide –contact your supplier.

Installation & Operation Manual Merlin 1000BH
Rev: 09 03-21 2
Contents
Important Warning Statements ...................................................................................2
General Information ..................................................................................................... 3
Access & Mounting...................................................................................................................................3
Internal Board Overview ..........................................................................................................................4
Board Connections Overview..................................................................................................................4
Auto Reset Switch.....................................................................................................................................5
BMS Switch ...............................................................................................................................................5
Fill & Prove Time Switch ..........................................................................................................................5
General Specification ...............................................................................................................................5
Operation ...................................................................................................................... 6
Initial Power-Up (Commissioning)...........................................................................................................6
Emergency Shut Off .................................................................................................................................6
LED Indication ...........................................................................................................................................6
General Maintenance ................................................................................................... 7
Cleaning .....................................................................................................................................................7
Bump Test (Gas Response Check) ........................................................................................................7
Important Warning Statements
Please take the time to thoroughly read these instructions which should be retained for future reference.
Detectors are shipped pre-calibrated and configured.
The expected lifetime of a gas sensor is 3-10 years upon initial power up dependant on your target gas and environmental
factors. The device will display a message to indicate this time and should immediately be replaced.
It is recommended that this device be commissioned upon installation and serviced annually by a competent person.
Do not apply lighter gas or other aerosols to the device –this will cause extreme damage to the sensors.
High concentrations of alcohol found in many products may damage, deteriorate or affect the gas sensing elements.
This device is designed to detect the gas type displayed on the screen only.
It is not designed to detect smoke, fire or other gases and should not be used as such.
This device provides early warning of the presence of gas, usually before a healthy adult would experience symptoms.
This warning is possible provided your alarm is installed and maintained in accordance with this manual.
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.
Multiple detectors may be required to adequately protect property and persons.
This device does not prevent dangerous gasses from occurring or accumulating.
Actuation of your alarm indicates the presence of dangerous levels of gas.
The device is not intended for use in potentially explosive atmospheres.
Seek fresh air supply and contact your local gas emergency service should you suspect a gas leak.
This unit may not fully safeguard individuals with specific medical conditions. If in doubt, consult a doctor/physician.
Your product should reach you in perfect condition, if you suspect it is damaged, contact your supplier.

Installation & Operation Manual Merlin 1000BH
Rev: 09 03-21 3
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 or one (1) years for oxygen detectors.
The manufacturer’s liability hereunder is limited to replacement of the product with repaired product at the discretion of the
manufacturer. 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.
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.
At the end of their working life, electrochemical sensors for oxygen and carbon monoxide detectors should be disposed of in an
environmentally safe manner. Alternatively they can be securely packaged and returned to S&S Northern clearly marked for
disposal. Electrochemical sensors should not be incinerated as this may cause the cell to emit toxic fumes.
General Information
The Merlin 1000BH is a gas pressure proving & gas detection panel for use in various applications.
The system comprises a control panel and a gas pressure sensor. The Merlin 1000BH can receive connections from
remote emergency shut-off buttons, two gas detectors, fire panel and heat detector. It also integrates with a BMS.
Access & Mounting
Unpack all the parts!
Designed for surface mounting and must be installed by a licensed, insured contractor or competent person.
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. Mark
the four screw holes located on the back of the enclosure to the wall and
ensure the wall surface is flat to prevent base distortion.
After executing the mounting and the connections –replace the front cover
and insert the security caps over the four bolts.
Access to the interior of the panel, when carrying out any work, must be conducted by a competent person.
Before carrying out any work ensure local regulations and site procedures are followed.
We recommend all Merlin gas detection equipment and systems are commissioned by a competent/trained
engineer to ensure correct installation and operation. Contact S&S Northern for more information.

Installation & Operation Manual Merlin 1000BH
Rev: 09 03-21 4
Internal Board Overview
1. POWER: Mains supply 100-240VAC. 3A
2. GAS VALVE: Gas Solenoid Valve Output, 230VAC, 3A.
3. GAS DETECTOR 1: 12vdc power supply.
4. GAS DETECTOR 2: 12vdc power supply.
5. PRESSURE SENSOR Extra Low Volt Input
6. EM REMOTE: Remote Emergency Buttons or Fire Alarm
7. BMS OUT: Normally Closed, Common and Normally Open.
8. FIRE PANEL: Input
9. TEMP SENSOR: Temperature Sensor/Heat Link
10. 12VDC: Permanent output when mains power supplied.
Board Connections Overview
POWER 100-240vac mains power supplied to the [POWER] connector using a 3-core cable fused at 3A.
On connecting the mains supply to the panel the power LED indicator will light up –this is located on the front.
GAS VALVE 100-240vac electrical power output from the [VALVE OUT] terminal using a 3-core cable to a gas
solenoid valve, which can shut the gas supply on alarm status.
GAS DETECTOR 1 & 2
The terminals detailed on the circuit board as [GAS DETECTOR 1] and [GAS DETECTOR 2].
These connections are [+ -] and [ ] these can be wired to a Merlin gas detector. Please refer to the detector
manual for more information. If no detector is used, leave the link in for a closed circuit.
Other detector types are available.
PRESSURE SENSOR
The terminals marked [+ - IN].
+Red Wire / -Black Wire / IN Blue Wire
Screw sensor into the downstream port of the gas solenoid valve!
Operating Pressure = 0- 100mbar
EM REMOTE
The terminal for remote emergency shut-off buttons is marked as [EM REMOTE].
These connections linked out as a factory setting. Remote emergency shut-off buttons should be volt free.
BMS OUT
Terminals are available on the circuit board for connections to Building Management systems.
This relay changes state in alarm or when 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, audible alarms etc.
Marked on the circuit board as [BMS OUT] Normally Closed (N/C), Common (COM) Normally Open (N/O).
These are volt free connections.
FIRE PANEL
The terminal for fire alarms is detailed on the circuit board as [FIRE PANEL]. These connections are linked out as a
factory setting. Fire alarms should be volt free and wired to the Merlin 1000BH using two-core cable.
TEMP SENSOR
The terminal for heat detectors is detailed on the circuit board as [TEMP SENSOR].
These connections are linked out as a factory setting. Heat detectors should be volt free and wired to the Merlin
1000BH using two-core cable.
12VDC
This is a permanent 12v DC output when there is power at the panel.
Normally used to power a PM2 current monitor. (Supplied separately)

Installation & Operation Manual Merlin 1000BH
Rev: 09 03-21 5
Auto Reset Switch
The panel has a built-in auto reset feature. There is a dipswitch located on the circuit board labelled [AUTO RESET].
This is factory set in the ‘Off’ position i.e. when power is restored after a power cut or loss, the panel has to be
restarted manually. When enabled, the system will restart automatically when power is restored and can be reset
following a fire alarm and when the alarm is cleared.
AUTO SWITCH
CONDITION
OFF
Panel has to be restarted manually following a power cut/loss and/or alarm.
ON
Panel will automatically restart when power is restored and can be reset remotely via a fire panel.
BMS Switch
The panel 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 electrical power is being sent to the solenoid. There is a dipswitch located on
the circuit board labelled [BMS SEL]. This is factory set to ‘OFF’ position which signals the BMS on gas on/gas off.
When switched to ‘ON’, the system will only signal the BMS on a fault, i.e. gas detected, EM Stop pressed, etc.
BMS SWITCH
BMS SIGNAL
OFF
Gas on or off only.
ON
Error condition i.e. gas detected, emergency stop pressed.
Fill & Prove Time Switch
There are two switches located on the circuit board labelled [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.
FILL TIME
PROVE TIME
OFF
5 Seconds (Default)
OFF
30 Seconds (Default)
ON
10 Seconds
ON
50 Seconds
Once the settings are changed - remove power for 10 seconds.
General Specification
Model:
1000BH
Visual Indication
LED
Mains Electrical Power Input
100-240vac
Gas Solenoid Valve Output
100-240vac
Current Consumption
12W max (50mA) @ 120VAC
Internal Fuse
3.15A
Operating Temperature
-10 ~ 40°C 30-80% RH
Audible Alarm Buzzer dB
65 dB (300mm distance in quiet conditions)
Pressure Sensor Operating Pressure
0 -100mbar
Housing Material
Polylac PA-765
Compliance
CE / UKCA
O/All Dimensions (H x W x D) mm / inch
180 x 255 x 77 mm/ 7.08 x 10.03 x 3”