Installation & Operation Manual Merlin 1000V
Rev: 02 05-22
6
BMS Output
Connections are available on the board for Building Management Systems.
[NO Normally Open] [COM Common] [NC Normally Closed]
These are volt free connections.
This is a relay that changes state when the gas is on/off and can be used in conjunction with the 12V DC
output and other external relays that affect other devices and controls such as purge fans and audible
alarms etc.
Pressure Sensor
Pressure sensors should be screwed to the downstream port of the valve.
Pressure Sensors are tested and certified to AS 4628/2005.
The pressure sensor is wired to the [PRESSURE SENSOR] connector and screwed into the downstream
port of the gas solenoid valve.
Connect the pressure sensor as shown:
The sensor will monitor the gas supply pressure and if pressure drops below 0.5 or 1.2Kpa
–
the gas valve will close.
See section; Switch Settings - for Pressure options
EM Remote
Connections for remote emergency shut-off or stop buttons is detailed on the circuit board as [EM
REMOTE]. This is linked out as a factory setting.
Gas Detector / CO2 Monitor
Refer to your gas detector and CO2 monitor manual for further information!
CO2 Monitors are powered via an external supply!
If no detector is being used leave the factory fitted link in.
A wiring example for a gas detector is shown.
Refer to your gas detector manual for further information.
CO
2
Monitor.
To connect a CO2 monitor and gas detector
–
wire in series and power the CO2
monitor via external mains power supply.
