Installation & Operation Manual
Mini Merlin
Rev: 11 09-20
10
Auto Reset & Buzzer Switches
There are two dip-switches on the circuit board.
ON
OFF
Auto Reset
In the event of a power loss – the mini merlin will
restart automatically when power is restored.
In the event of a power loss – the mini merlin will
need to be reset manually when power is restored.
This is the factory set condition.
Buzzer
The buzzer will sound every 15 seconds during
pre-alarm and continuously at alarm level.
This is the factory set condition.
The buzzer will not sound at any gas level.
Building Management System Integration
This device can be integrated with a Building Management System (BMS), a home alarm
system, or be used as part of a boiler low voltage safety limit to make or break a circuit on both
gases separately, (valve open or valve closed) depending on the system.
These switches can be used for a variety of purposes including triggering alarm contacts,
operating and external relay for multiple appliance shut-down and generating status signals for
a BMS system.
Specification
Product:
Mini Merlin
Version:
CH4CO
Display
1.8” TFT – Thin Film Transistor
Screen Brightness
Non- adjustable
Initial Stabilisation Time
60 Seconds approx.
Power Input Voltage
100-240Vac / 50-60Hz
Valve Output Voltage
100-240Vac / 50-60Hz
Fuse
Anti-Surge 3.15A 250Vac
Current Consumption
3W Max
Accuracy @ 25°C / 77°F
± <10%
Operating Temp
32 – 122°F 30-85%RH Non-Condensing
Audible Buzzer
65dB (controlled conditions @ 1 ft)
Volt Free BMS relay output
0.5A switching current (resistive load)
Gas Sensor Type
Methane: Semi-conducting
Carbon Monoxide: Electromechanical
Gas Sensor Measuring Range
Methane: 500-10,000ppm
Carbon Monoxide: 0-1000ppm
Gas Value Pre-Alarm
Methane: >8% LEL
Carbon Monoxide: 20ppm
Gas Value Alarm
Methane: >10% LEL
Carbon Monoxide:
20ppm after two (2) hours
50ppm after one (1) hour
100ppm after ten (10) minutes
300ppm after one (1) minute
Dimensions (mm)
95(W) x 140(H) x 60(D)
Weight 242g approx.
X-Cel House, Chrysalis Way, Langley Bridge,
Eastwood, Nottinghamshire NG16 3RY
+44 (0) 1773 534555
[email protected]
dmsltd.com
