Merlin
Product Data Sheet
S&S Northern Ltd
8
Wiring Diagram
1. Mains Input 230V Single Phase.
2. Gas Solenoid Valve Power Output, 230VAC, Max 3A.
3. Electric Contactor Power Output, 230VAC, Max 3A.
4. Water Valve Power Output, 230VAC, Max 3A.
5. Supply Fan PD Switches terminal, this is disabled on this system.
6. Extract Fan PD Switches terminal, this is disabled on this system.
7. BMS output contacts. Normally Closed, Common and Normally Open. Max.1A @ 230VAC.
8. Gas pressure transducer, Red + positive, Black
– negative and Blue IN.
9. Remote EM Stop buttons and Fire Alarm input wired in series (purchased separately).
VOLT
FREE INPUT
10. Methane, CO or LPG Detector, power supply and
volt free input
(purchased separately).
CO2 Monitor (purchased separately).
VOLT FREE INPUT
11. Fan Switch output (purchased separately). For wiring instruction, see Fan Switch user manual.
12. Fan PD Switches terminal (purchased separately).
VOLT FREE INPUT
13. Permanent 12VDC output when there is power at the panel.
Please note, Mains wires and low voltage wires should
not be run in the same conduit as per the
LOW
VOLTAGE DIRECTIVE
1
2
5
3
6
7
8
9
10
11
L
N
E
Gas Valve
Pressure
Transducer
EM
Stop
Gas Detector/
CO2 Monitor
3
L
N
E
Water Valve
4
5 6
7 8 9 10 11 12 13
PD Switches or Current Switches
(Volt Free)
F
A
N
P
D
S
W
I
T
C
H