Merlin RS Installation & Operation Manual
REV 06 Page 4 of 12
INSTALLATION
General Information
Failure to observe the following may cause injury to persons and/or property.
The RS detector series is to be installed in non-classified, non-hazardous, permanent locations and is
intended to continuously monitor the ambient air for carbon dioxide (CO
2
) levels, temperature (°C) and
relative humidity (rH%) providing an analogue and/or digital representation of the levels.
Designed for all areas being directly connected to low or mains voltage supply, e.g., residential, public,
commercial, and light industrial environments, which support the following outputs:
•
Analog:
3x 0-10V signals for CO2 (PPM), Temperature (°C) and Humidity (% Relative).
•
Digital:
RS-485 Modbus RTU or BACnet MS/TP communication protocols.
•
Relay:
VFC (CO2): 1x SPST 70mA Max.
•
Thermistor
: 10K3 output for 3rd party temperature monitoring.
The equipment can operate as a standalone unit, be connected to a Merlin control panel or to other 3
rd
party
devices capable of accepting digital and/or analogue signals, such as a Building Management System (BMS).
Installation must be carried out by a licenced and insured contractor, installed, and located in positions
determined by those who have knowledge of CO
2
dispersion, process plant systems and any equipment
involved. Seek advice where necessary, in consultation with both safety and electrical engineering personnel.
Consider air flow patterns within the area, RS detectors must be installed in the correct orientation as per the
manufacturer’s specification
, and ease of access should be accounted for to allow for any forms of
maintenance throughout its operational life. For installations in North America, the National Electrical Code
(NEC) should be strictly observed, and all appropriate local and national regulations should be observed.
Coverage
There are no official figures of area coverage for a detector; however, 50 feet (15.2 metres) per detector or
7,580 square feet (704.2 square metres) per detector is a reasonable general guide therefore multiple
detectors may be required to adequately monitor and protect property and/or persons.
Positioning
Position at a location with minimum noise, vibration, and environmental variation.
Recommended heights may vary based on air flow and temperature conditions in addition to the proposed
application and location.
Generally, the installation height of a monitor for CO
2
would be
breathing zone
–
3-5ft from ground level
.
Observe the following also.
•
The possible damage caused by natural events e.g., rain, flooding, falling debris.
•
Ease of access to the RS monitor.
•
Any regulation/standard/code that locations are bound by.
