AGS Mini Merlin CH4CO Installation & Operation Manual - Page 8

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Installation & Operation Manual

Wiring the Device

Gas Supply Controlled by 100-120VAC Solenoid Valve
A 110-120VAC gas solenoid valve should be powered using the
terminals marked [VALVE OUT].
When the GAS VALVE terminal is wired to a normally closed (NC) gas
solenoid valve, the device can be used to isolate gas supply for
multiple appliances.
If you use a gas solenoid valve, please note that standing pilots will
need to be re-lit.
CAUTION: We do not recommend installing a gas solenoid valve with standing pilots.
Gas Supply Controlled by 24VAC Solenoid Valve
When the GAS VALVE terminal is wired to a normally closed (NC)
gas solenoid valve, the device can be used to isolate gas supply
for multiple appliances.
The diagram shown opposite uses an external transformer (not
supplied) to close a 24vAC gas solenoid valve that could supply
gas to one or more appliances.
If you use a gas solenoid valve, please note that standing pilots will
need to be re-lit.
CAUTION: We do not recommend installing a gas solenoid valve with standing pilots.
Appliance Limit Circuit
The device can be used to directly shut down a gas appliance when a
fault condition is detected (gas leak), by wiring the normally
closed (NC) and common (COM) terminals
of the low volt BMS switches into the low
voltage safety limit circuit of the appliance.
If gas is detected, the limit circuit is opened, disabling the appliance.
Rev: 12 01-20
AGS Mini Merlin CH4CO
8