Flamefast BAC Installation & Operation

INSTALLATION & OPERATION
BAC RANGE
TECHNICAL SPECIFICATION
Power Supply 24V AC/DC ±10%
Power Consumption 50Ma Max
BACnet (BAC range only) MS/TP over RS485
Baud: 9k6, 19k2, 38k4 or 76k8
127 Address (1/10th Load)
Analogue Outputs 3x 0-10V
Thermistor Output 10K3A1
VFC Output SPST – 100mA @ 24V Max
CO2 Range 0 - 10,000ppm
CO2 Output Scaling 0 - 2,000 / 5,000ppm
CO2 Accuracy ±40 ppm +3% @ NTP
CO2 Display Resolution 1ppm
CO2 Sensing Method Non Dispersive Infra-red (NDIR)
CO2 Typical Sensor Life 10+ Year
Temp Range 0 - 50°C
Temp Accuracy ±0.3°C @ 25°C
Temp Display Resolution 0.1°C
RH Range 0 - 100%
RH Accuracy ±2% @ 20 - 80%
RH Display Resolution 0.1%
Operating Conditions Temp
Humidity
Sampling Method Diffusion
Warm-up Time 30 Seconds
Colour Wall - Pure White (RAL9010)
Duct – Black/Clear
Approval CE, UKCA
IMPORTANT – Please read carefully:
1. This product must be installed by a competent/qualified person in accordance
with all relevant regulations and legislations.
2. This product must be mounted flush to the wall (or similar) using secure
fixings to prevent access to the rear.
3. The sensors must be continuously powered to allow the CO2 auto-calibration
to take place (every 7 days).
4. The use of solvents, cleaning fluids or fine dusts near to the unit can damage
the sensing elements.
5. If there is any question over the application, please contact to discuss.
6. If this equipment is used in a manner not specified by the manufacturer,
protection provided may be impaired.
7. This product is designed for indoor use with standard atmospheric conditions.
8. When the sensor is used as part of a Gas Safety system, please ensure the
correct program is used.
MOUNTING LOCATION
Application specific mounting positions should be considered, however the below
guidance will be suitable for most installations.
Although CO2 is heavier that air, for most HVAC applications the sensors should
be mounted at head height. For applications where there are stored
concentrations of CO2 please refer to the Gas Detector/Sensor range.
Typical Mounting Heights:
Application Mounting Height
General Areas 1500mm Above Finished Floor Level
Science Classrooms 1500mm Above Finished Floor Level
Food Tech Rooms 2500mm Above Finished Floor Level (not within 100mm of ceiling)
Kitchens 2500mm Above Finished Floor Level (not within 100mm of ceiling)
Important Notes:
- Do not install directly above any appliance or burner.
- Do not install in high velocity air streams (near an air Inlet/Outlet).
- Do not install next to doors or opening windows.
- Do not install in direct sunlight.
FLAMEFAST RESERVE THE RIGHT TO CHANGE PRODUCT SPECIFICATION WITHOUT PRIOR NOTICE
0 - 50°C
0 - 95% (NC)
INSTALLATION
All installation details shown on the wiring diagram should be followed carefully,
failure to do so could result in irreparable damage to the unit.
Screened cable should be used at all times. Any voltage induction can result in
corruption of the BACnet interface or irreparable damage to the sensor.
The connection details for the Wall and Duct mount units are the same, the only
difference is the mounting.
Wall Mount Enclosure
The wall mount enclosure is designed to fit on a standard single gas junction box
or conduit box. Please take care when tightening fixing screws as overtightening
can distort the plastic.
To open/close:
1. Remove securing screw from the bottom of the enclosure.
2. Insert a flat screwdriver into the slot behind the screw and apply pressure
until the bottom of the enclosure releases.
3. Pull the front of the enclosure outward from the bottom then up to release
hooks securing the top.
4. When closing, hook the clips into place, then push the bottom until the
securing clip fully engages.
Duct Mount Enclosure
The duct mount enclosure is IP66 external to the duct and although a foam gasket
is provided, additional sealant may be required to maintain the integrity of the
duct (the use of solvent based sealant may damage the sensing elements).
To open/close:
1. Remove securing screw from the lid of the enclosure.
2. Press on both securing clips simultaneously to release then simply open using
the hinge mechanism.
OPERATION
On power up, the LCD will cycle through Green, Amber, Red then White with all
segments lit to prove the correct operation of the display. During this warm-up,
the volt free contact will be in the default position for the selected programme
and the analogue outputs will provide 6V.
Once the warm-up is complete, the LCD will display the levels for any connected
sensors, provide a traffic light indication based on live CO2 level, the relay output
will change to the correct position for the programme and the voltage outputs will
reflect relevant levels.
If no CO2 sensor is present, the relay will be in an alarm state.
MAINTENANCE
Due to the Automatic Background Calibration (ABC) algorithm, the sensor is
effectively maintenance free. Some applications may require this to be disabled –
please contact Flamefast for further details. To allow calibration to take place, the
sensor must be exposed to atmospheric levels (400ppm) at least once every 8
days.
If the sensor is installed as part of a Gas Safety system, the sensor should be
'bump' tested by applying a CO2 test gas, although the same result can be
achieved by breathing on the sensor.
TROUBLESHOOTING
If you are having any issues, please contact Flamefast to discuss.
BAC_OM_0224
www.flamefast-gas-safety.co.uk