User Manual
Merlin 3000S
Iss: 10 Page 5
Electrical Connections
1
POWER IN
The Merlin 3000S requires an AC single phase power supply rating of 100-240V~ connected to [Power In]
terminal using a 3A fuse spur. Frequency 50-60Hz.
2
GAS VALVE
100-240V AC Power Output to a gas solenoid valve. Refer to the gas valve for more information.
3
CONTACTOR
100-240V AC Power Output to an Electrical Contactor. Maximum current of the valve and Contactor combined
should not be loaded over 3 Amps.
4
FAN CURRENT SENSOR - Extract
These terminals are used to receive an input signal from external air pressure switches or external current
monitors. These terminals are linked out as a factory setting. Wiring to air pressure differential switches and
current monitors should be made using two-core volt free connections.
5
FAN CURRENT SENSOR - Supply
These terminals are used to receive an input signal from external air pressure switches or external current
monitors. These terminals are linked out as a factory setting. Wiring to air pressure differential switches and
current monitors should be made using two-core volt free connections.
NOTE:
Current Sensor Terminals not in use should be left with link screwed in. e.g., if only one fan is used.
