S&S Northern Merlin 3000S Manual de usuario

Merlin 3000S USER GUIDE

Rev: 07 05-19 1

Gas Safety Products

Merlin 3000S

Energy saving ventilation interlock and gas control system

User Guide

Please read this guide carefully and retain for future use.

Merlin 3000S USER GUIDE 
Rev: 07 05-19 2 
 
Contents 
1About your new 3000S system ............................................................................................... 3 
2System Positioning ................................................................................................................... 4 
33000S Circuit Board ................................................................................................................. 4 
POWER IN..................................................................................................................................................................5 
GAS VALVE ...............................................................................................................................................................5 
CONTACTOR ............................................................................................................................................................5 
FAN CURRENT SENSOR - Extract Fan ....................................................................................................................5 
FAN CURRENT SENSOR - Supply Fan.....................................................................................................................5 
BMS OUT....................................................................................................................................................................5 
FAN ENABLE - Extract Relay Output .....................................................................................................................5 
FAN ENABLE –Supply Relay Output.....................................................................................................................5 
PRESSURE SENSOR....................................................................................................................................................6 
EM REMOTE...............................................................................................................................................................6 
CO DETECTOR..........................................................................................................................................................6 
CO2 Zone 1 - 0-10V Input ......................................................................................................................................6 
CO2 Zone 2 - 0-10V Input ......................................................................................................................................6 
CO2 MONITOR.........................................................................................................................................................7 
GAS METER ...............................................................................................................................................................7 
FIRE PANEL ................................................................................................................................................................7 
12VDC OUT...............................................................................................................................................................7 
OPTICAL SENSOR (ZONE 1) ....................................................................................................................................8 
DUCT TEMP (ZONE 1)...............................................................................................................................................8 
OPTICAL SENSOR (ZONE 2) ....................................................................................................................................8 
DUCT TEMP (ZONE 2)...............................................................................................................................................8 
0-10V OUTPUT –Extract Fan...................................................................................................................................9 
0-10V OUTPUT –Supply Fan ...................................................................................................................................9 
4System Start Up ........................................................................................................................ 9 
System ON & OFF ....................................................................................................................................................9 
Boost Button ...........................................................................................................................................................10 
Adjusting the Screen Brightness..........................................................................................................................10 
5Installation Settings ................................................................................................................ 11 
SETTINGS 1 menu ...................................................................................................................................................11 
SETTINGS 2 menu ...................................................................................................................................................11 
SETTINGS 1 Explanation ........................................................................................................................................12 
SETTINGS 2 Explanation ........................................................................................................................................13 
6Warning Status ....................................................................................................................... 15 
7Fault Status.............................................................................................................................. 16 
83000S Wiring Spec ................................................................................................................. 18 
9Manufacturer’s Warranty ...................................................................................................... 20 
 
 

Merlin 3000S USER GUIDE

Rev: 07 05-19 3

1About your new 3000S system

The Merlin 3000S system is designed to vary the speed of ventilation based on multiple factors; 1)

Real-time gas usage via a turbine gas meter; 2) Carbon dioxide (CO2) detected levels in the area;

3) Smoke/ steam detection within a canopy and 4) Heat detection in the extraction ductwork.

For optimum results and protection-all system sensing elements should be utilised together but any

combination can be used.

The Merlin 3000S also carries out its duty as a traditional ventilation interlock and gas pressure

proving system alongside the ventilation-on-demand capabilities.

3000S Benefits

Interlock with ventilation using Fan Current Sensors or Air Pressure Differential switches

Optional gas proving function

Automates ventilation based on real-time gas consumption and CO2levels

Minimises heat loss via extraction by reducing fan speed when gas usage is minimal

Minimises heat loss via extraction by reducing fan speed when CO2levels are minimal

Pulsed output gas meter can be linked to other Building Management Systems

Reduced ventilation noise levels at times of low kitchen activity

Accepts Methane, LPG and CO detection systems

Covered by the S&S Northern 3 year warranty.

For more information and a range of gas safety systems, visit - www.snsnorthern.com

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 3000S USER GUIDE

Rev: 07 05-19 4

2System Positioning

3000S Control

Panel

The control panel is designed for surface mounting using 4 mounting screws.

Removing the cover on the panel gives access to the circuit board (PCB).

Remove the PCB before drilling entry holes into the case.

CO2 Monitor

1-3m away from canopy

> 1m of a window and

1.7m from ground level.

CO Detector

1.7m from ground level.

Optical Sensor

Fit inside of canopy.

Max 5m from infra-red reflector fitted opposite sensor.

Duct Temp

Sensor

Fit inside of ductwork where heat passes through.

Speed Controller

Recommended away from panel to avoid electrical noise.

33000S Circuit Board

Merlin 3000S USER GUIDE

Rev: 07 05-19 5

1. POWER IN

A 100-240VAC electrical supply should be supplied to the panel. This should be fused at 3A.

2. GAS VALVE

The gas solenoid valve should be powered using the terminal detailed [L N E GAS VALVE].

3. CONTACTOR

An electrical output will be supplied to an electrical contactor. This should be internally fused at 3A

and should be connected to the terminals detailed [L N E CONTACTOR].

Maximum current of the valve and Contactor combined should not be loaded over 3 Amps.

4. FAN CURRENT SENSOR - Extract Fan

These terminals are used to receive an input signal from external air pressure switches or external

current monitors. These are linked out as a factory setting. Wiring to air pressure differential switches

and current monitors should be made using two-core volt free connections.

5. FAN CURRENT SENSOR - Supply Fan

These terminals are used to receive an input signal from external air pressure switches or external

current monitors. These are linked out as a factory setting. Wiring to air pressure differential switches

and current monitors should be made using two-core volt free connections.

Terminals not in use should be left with link screwed in. e.g. if only one fan is used.

6. BMS OUT

Terminals are available on the circuit board for connections to Building Management Systems

(BMS). Detailed on the circuit board as [BMS OUT] - [N/C / COM / N/O] = Normally Closed /

Common / Normally Open.

These are low voltage connections

7. FAN ENABLE - Extract Relay Output

This terminal switches when the key is turned on and off.

This can be linked to a fan switch (speed controllers supplied separately)

which can provide power to the fans when the control panel is switched on.

This can work as normally closed - N/C or normally open - N/O

8. FAN ENABLE –Supply Relay Output

This terminal switches when the key is turned on and off.

This can be linked to a fan switch (speed controllers supplied separately)

which can provide power to the fans when the control panel is switched on.

This can work as normally closed - N/C or normally open - N/O

Merlin 3000S USER GUIDE

Rev: 07 05-19 6

9. PRESSURE SENSOR

The terminals are detailed [PRESSURE SENSOR] - [+ / - / IN].

Connect to the gas pressure transducer (supplied separately) by screwing into the downstream

port on the gas solenoid valve.

Please ensure this is wired to the 3000S as shown.

Operating pressure:

Min = 12mbar

Max = 100mbar

10. EM REMOTE

The terminal for remote emergency shut-off buttons is detailed on the circuit board as [EM

REMOTE]. This connection is linked out as a factory setting.

Remote emergency shut-off buttons should be volt free and wired using two-core cable.

11. CO DETECTOR

These connections are [ + / - ] (12VDC) and [ ] and can be wired to a Merlin

Carbon Monoxide (CO) gas detector –see below diagram.

If no detector is being used leave the link in between the “ ”.

12. CO2 Zone 1 - 0-10V Input

A 0-10VDC signal from a Merlin CO2Monitor will automate

the speed of extract and supply fans dependant on CO2

detected levels detected.

13. CO2 Zone 2 - 0-10V Input

A 0-10VDC signal from a Merlin CO2Monitor will automate

the speed of extract and supply fans dependant on CO2

detected levels detected.

Merlin 3000S USER GUIDE

Rev: 07 05-19 7

14. CO2 MONITOR

This is a linked out connection [ ] and can be wired to a Merlin Carbon Dioxide (CO2) monitor.

If no CO2Monitor is being used - leave the link in between the “ ” terminal.

15. GAS METER

Before any connections are made, please refer to the Gas Meter operation manual.

This is a low voltage connection with a varied

pulse input to drive fans on an automatic

varied speed based on real-time gas usage.

TBX –Turbine Gas Meter has two types of pulse output –'unit pulse' and 'high density pulse'.

The Merlin 3000S requires a high density pulse wire.

16. 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 using two-core cable- normally closed and open upon activation

17. 12VDC OUT

This is a permanent 12V DC output (max loading 150mA/~2W) when there is power at the panel.

This is normally used to power a Merlin PM2+ Current Monitor (supplied separately).

Merlin 3000S USER GUIDE

Rev: 07 05-19 8

18. OPTICAL SENSOR (ZONE 1)

The terminals detailed on the circuit board as [OPTICAL SENSOR] - [ + / - ] [ 1 / 2 ] are wired to the

optical sensor (supplied separately).

19. DUCT TEMP (ZONE 1)

This is a low resistance connection to the duct temperature sensor to drive fans

on an automatic varied speed based on extraction duct temperature levels.

20. OPTICAL SENSOR (ZONE 2)

See OPTICAL SENSOR (ZONE 1)

21. DUCT TEMP (ZONE 2)

See DUCT TEMP (ZONE 1)

Merlin 3000S USER GUIDE

Rev: 07 05-19 9

22. 0-10V OUTPUT –Extract Fan

The terminals for the 0-10VDC outputs are detailed on the circuit board

as [EXTR. FAN] & [SUPP. FAN].

These connections are used to regulate external fan speed controllers

(supplied separately) which can accept this control signal.

23. 0-10V OUTPUT –Supply Fan

The terminals for the 0-10VDC outputs are detailed on the circuit board

as [EXTR. FAN] & [SUPP. FAN].

These connections are used to regulate external fan speed controllers

(supplied separately) which can accept this control signal.

4System Start Up

System ON & OFF

To turn the unit ON - Turn the key switch to ON position.

To turn the unit OFF - Turn the key switch to the OFF position.

When the system is connected to the mains electrical supply, the red dot of the S&S logo located

on the bottom of the panel will illuminate. When no power is present, this LED will not illuminate.

Under normal conditions –The display will show the speed of fans

When the 3000S is turned off and 'Fan Overrun Time' from menu is selected the display will advise

auto-fan switch off. See settings.

To deactivate - press emergency button or switch key ON.

Merlin 3000S USER GUIDE

Rev: 07 05-19 10

Boost Button

To boost the ventilation and prompt maximum fan speed -

Press and Release the [Boost] button located on front fascia

and the pre-selected boost time will display on screen.

When boost time reaches zero, the fans will automatically

return to normal operation mode.

To turn boost mode off - Press and Release the [Boost] button

located on front fascia - the system will return to normal operation.

Adjusting the Screen Brightness

Hold the UP [▲] button on the front panel for ~3 seconds until the panel beeps.

Press UP again to select three brightness levels (High / Medium / Low).

Once you have selected your desired brightness, leave the panel for ~5 seconds and the

brightness will set.

Waiting for Fans

Upon powering up the 3000S, the system will display the

following screen until the fan/s reach the speed set by the

engineer. After the fan/s have reached the desired settings, the

system will continue as normal.

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