AGS Merlin 1500S Manuale d'uso - Pagina 4

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Merlin 1500S

Circuit Board Terminals

2.1

A 110-120VAC electrical supply should be externally fused at

3A and connected to the terminals marked [LINE VOLTAGE

LNE].

2.2

The 110-120VAC gas solenoid valve should be powered using

the terminals on the Merlin 1000S detailed [VALVE OUT LNE].

2.3

SUPPLY FAN & EXTRACT FAN PD SWITCHES

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 as shown.

2.4

Terminal connections are available on the circuit board for connections to

Building Management systems.

This is a relay that changes state in alarm or when gas is on/off and can be

used in conjunction with the [12VDC] output and other external relays that

affect other devices and controls such as purge fans, audible alarms etc.

Detailed on the circuit board as [BMS OUT] normally closed (N/C),

common (COM) and normally open (N/O). These are volt free connections.

2.5

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

1500S using a plenum security cable, white, 18/2 (18AWG 2 conductor),

stranded, CMP or similar.

Rev: 07

05-19

Wiring to switches & current monitors should be made using

two-core volt free connections.

If only one fan is being used the terminals not in use should be

left linked out.

User Guide