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Merlin CT1200S

 

 

 

 

 

                                         

User Guide 

 

 

Rev: 03    05-23

 

4  

Circuit Board Terminals 

 

2.1

 

POWER IN

 

A 110-240VAC electrical supply should be externally fused at 
3A and connected to the terminals marked [POWER IN LNE].  

 

2.2

 

TO VALVE 

The 110-240VAC output to a gas solenoid valve should be 
powered using the terminals on the CT1200S detailed [GAS 
VALVE LNE]. 

 

 

 

 

 

2.3

 

TO BMS  

Connections to Building Management systems.  

This is a relay that changes state in alarm or when gas is on/off and other 

external relays that affect other devices and controls such as purge fans, 
audible alarms etc. 

Detailed on the circuit board as [BMS OUT] normally closed (N/C), common 

(COM) and normally open (N/O). These are volt free connections.  

 

 

2.4

 

EM REMOTE 

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

These connections are linked out as a factory setting.  

 

Remote emergency shut-off buttons should be volt free and wired to the 
CT1200S. 

 

 

2.5

 

FAN PD SWITCHES

 

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 as shown.  

 

Wiring to switches & current monitors should be made using two-core 

volt free connections.  

If only one fan is being used in Mode 1 (see 3.5) the terminals not in use 

should be left linked out. 

If only one fan is being used in Mode 2 (see 3.5), pressure switch or current monitor should be 

wired into both, Supply and Extract terminals. 

 

 

 

Summary of Contents for Merlin CT1200S

Page 1: ...ation Interlock system Installation Operation Maintenance Please read this manual carefully and retain for future use For specific requirements that may deviate from the information in this guide cont...

Page 2: ...als 4 2 1 POWER IN 4 2 2 TO VALVE 4 2 3 TO BMS 4 2 4 EM REMOTE 4 2 5 FAN PD SWITCHES 4 3 Installation Operation 5 3 1 System ON and OFF 5 3 2 Emergency Shut Off 5 3 3 BMS Integration 5 3 4 Fire Alarm...

Page 3: ...y 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...

Page 4: ...on COM and normally open N O These are volt free connections 2 4 EM REMOTE The terminal for remote emergency shut off buttons is detailed on the circuit board as EM REMOTE These connections are linked...

Page 5: ...4 Fire Alarm Integration The Merlin CT1200S can be integrated with a fire alarm to close the gas supply automatically in the event of a signal from the fire alarm panel The volt free fire alarm signa...

Page 6: ...normal working the LED will illuminate GREEN If a supply fan fault is present the LED will be flashing If the LED flashes for more than 20 seconds the gas will be shut off ON OK FLASHING the supply f...

Page 7: ...ice NEVER paint the device Paint will seal vents and interfere with the device 6 CT1200S Wiring Spec 1 POWER IN Mains Input 100 240VAC Single Phase 2 TO VALVE Gas Solenoid Valve Power Output 100 240VA...

Page 8: ...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 consum...

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