Merlin 1000S Gas Proving System Product Data Sheet
S&S Northern Ltd 3
1 General information
The Merlin 1000S is a gas pressure proving & gas detection panel
The system comprises of a control panel and a gas pressure sensor. The Merlin 1000S can
receive connections from remote emergency shut-off buttons, gas detectors and a CO2
monitor. It can also be integrated with a BMS and fire alarm.
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.
2 Installation
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. The PCB should be
removed before drilling entry holes into the case.
2.2 Mains Supply. A 230-volt electrical supply should be supplied to the panel. This should be
externally fused at 3 Amps using a fused spur and should be connected to the terminals
marked ”LNE Power IN”
2.3 Gas solenoid valve. The gas solenoid valve should be powered using the terminals on the
Merlin 1000S marked “LNE to VALVE”.
2.4 BMS Connections. Terminal connections are available on the circuit board for connections to
Building Management systems etc. Detailed on the circuit board as “BMS OUT N/C, COM and
N/O” these are volt free connections.
2.5 Gas Pressure Transducer. The terminals marked pressure sensor “+ - IN “.These wire to the
gas pressure transducer which is screwed into the downstream port on the gas solenoid valve.
Red + positive, Black –negative and Yellow or Blue IN. Please ensure this is wired as
instructed.
Minimum Operating Pressure = 12Mbar
Maximum Operating Pressure = 100Mbar.
2.6 Timeout Facility. The Merlin 1000S has a built-in Auto-shut down feature and it will turn itself
off after predefined time. Auto-shut down timeout is selectable. There are two dip-switches
located on the inside facia of the Merlin 1000S labelled “Time1” and “Time2”. They are factory
set in the ‘off’ position for a 2 hour timeout. On installation, they can be switched to the ‘on’
position to select required timeout.
Time1 Off, Time2 Off –2 hours
Time1 On, Time2 Off –4 hours
Time1 Off, Time2 On –8 hours
Time1 On, Time2 On –no timeout (auto-shut down disabled)
On Auto-shut down gas supply will be turned off.
2.7 Remote emergency shut off buttons. 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 Merlin 1000S
using two-core cable.
2.8 Gas Detector. The terminals detailed on the circuit board as “Gas Detector”. These
connections are “+,-“ and ” ” these can be wired to a Merlin Natural gas, Carbon monoxide
or LPG detector. If no detector is being used leave the link in between the “ ”. Other detector
types are available.
