Merlin 3000S
USER GUIDE
Rev: 07 05-19
5
1.
POWER IN
A 100-240VAC electrical supply should be supplied to the panel. This should be fused at 3A.
2.
GAS VALVE
The gas solenoid valve should be powered using the terminal detailed [L N E GAS VALVE].
3.
CONTACTOR
An electrical output will be supplied to an electrical contactor. This should be internally fused at 3A
and should be connected to the terminals detailed [L N E CONTACTOR].
Maximum current of the valve and Contactor combined should not be loaded over 3 Amps.
4.
FAN CURRENT SENSOR - Extract Fan
These terminals are used to receive an input signal from external air pressure switches or external
current monitors. These 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 Fan
These terminals are used to receive an input signal from external air pressure switches or external
current monitors. These 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.
Terminals not in use should be left with link screwed in. e.g. if only one fan is used.
6.
BMS OUT
Terminals are available on the circuit board for connections to Building Management Systems
(BMS). Detailed on the circuit board as [BMS OUT] - [N/C / COM / N/O] = Normally Closed /
Common / Normally Open.
These are low voltage connections
7.
FAN ENABLE - Extract Relay Output
This terminal switches when the key is turned on and off.
This can be linked to a fan switch (speed controllers supplied separately)
which can provide power to the fans when the control panel is switched on.
This can work as normally closed - N/C or normally open - N/O
8.
FAN ENABLE – Supply Relay Output
This terminal switches when the key is turned on and off.
This can be linked to a fan switch (speed controllers supplied separately)
which can provide power to the fans when the control panel is switched on.
This can work as normally closed - N/C or normally open - N/O
