S&S Northern Merlin CT500S User manual

Merlin CT500S Gas Isolation Panel Product Data Sheet
Rev: 06 Date: 01-11-18 1
Gas Safety Products
Merlin CT500S Gas Isolation Panel
Installation, Operation and Maintenance
Read these instructions carefully before operating or servicing

Merlin CT500S Gas Isolation Panel Product Data Sheet
Rev: 06 Date: 01-11-18 2
Table of contents
1GENERAL INFORMATION ...................................................................................3
2INSTALLATION.....................................................................................................3
2.1 PANEL MOUNTING ........................................................................................................3
2.2 CT500 CIRCUIT BOARD TERMINALS..............................................................................3
2.3 POWER [1]......................................................................................................................4
2.4 GAS VALVE [2]...............................................................................................................4
2.5 REMOTE EM STOP [3].....................................................................................................4
2.6 12VDC [4].......................................................................................................................4
2.7 INTERNAL BUZZER ...........................................................................................................4
3OPERATION ........................................................................................................4
3.1 SYSTEM ON & OFF .........................................................................................................4
3.2 LED STATUS .....................................................................................................................4
POWER ...............................................................................................................................4
GAS ON..............................................................................................................................4
EM Stop LED.......................................................................................................................4
CT500 WIRING ...........................................................................................................5

Merlin CT500S Gas Isolation Panel Product Data Sheet
Rev: 06 Date: 01-11-18 3
1GENERAL INFORMATION
The Merlin CT500S is a gas isolation panel.
The CT500S is designed to provide an effective way of isolating gas by means of a key switch
on the panel or by the operation of the emergency shut off button.
The CT500S can receive connections from remote emergency shut-off buttons and also
features a permanent 12VDC output.
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.
2INSTALLATION
2.1 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.
2.2 CT500S CIRCUIT BOARD TERMINALS

Merlin CT500S Gas Isolation Panel Product Data Sheet
Rev: 06 Date: 01-11-18 4
2.3 POWER [1]
A 240VAC Single Phase electrical supply should be supplied to the panel.
This should be externally fused at 3 Amps using a fused or circuit breaker.
2.4 GAS VALVE [2]
This outlet provides a 240VAC 3 amp signal to the solenoid valve. Please consult the solenoid
valve installation instructions for further information.
2.5 REMOTE EM STOP [3]
These connections are linked out as a factory setting.
Remote emergency shut-off buttons should be volt free and wired to the Merlin panel using a
two-core cable.
2.6 12VDC [4]
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.
Please contact your supplier for further information.
2.7 INTERNAL BUZZER
Operates at 65dB measured 30cm from closed panel.
3OPERATION
3.1 SYSTEM ON & OFF
1. Turn the key switch to on position.
2. To turn the system off, turn the key switch to off position.
3.2 LED STATUS
POWER
When the system is connected to the mains supply.
When no power is present, this LED will not light up.
GREEN = OK
OFF = No power to CT500S, a loose ribbon connection or the fuse may not be intact.
GAS ON
When the fans are operational and the key switch is turned on, the Merlin CT500S will check the
installation for gas leaks. If gas proving is successful, the gas valve will open and the green ‘Gas
On’ LED will illuminate.
GREEN = Gas On
OFF = Gas Off
EM Stop LED
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
AMBER = EM Stop button pressed

Merlin CT500S Gas Isolation Panel Product Data Sheet
Rev: 06 Date: 01-11-18 5
CT500S WIRING
1) [POWER] Mains Input 230-240VAC Single Phase.
2) [GAS VALVE] Gas Solenoid Valve Power Output, 230-240VAC, Max 3A.
3) [REMOTE EM STOP] Remote EM Stop buttons and Fire Alarm input wired in series VOLT FREE
(Purchased separately).
4) [12VDC] Permanent 12VDC output when there is power at the panel. 50mA max
Panel Net Weight: 961g
Panel Dimensions: (W) 190 x (L) 140 x (D) 60mm
PLEASE NOTE:
MAINS AND LOW WIRING SHOULD NOT RUN IN THE SAME CONDUIT AS PER THE LOW VOLTAGE DIRECTIVE

Merlin CT500S Gas Isolation Panel Product Data Sheet
Rev: 06 Date: 01-11-18 6
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.
CONTACT US:
S&S Northern Head Office
Tel: [phone]
Fax: [phone]
www.snsnorthern.com
[e-mail]
South East Division
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Fax: [phone]
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S&S Northern is the owner of this document and reserves all rights of modification without prior notice.