Andel Floodline DD Series User manual
FLD DD Gas Sensor 22.03.2022 Rev.0
2
Contents
Introduction......................................................................................... 3
Installation........................................................................................... 4
Mounting......................................................................................4
Supply Connection ........................................................................4
Relay Connections.........................................................................5
Floodline Multi Zone Panel Connection.........................................5
Operation ............................................................................................ 5
Power Up......................................................................................5
Leak Detected...............................................................................5
Technical Specifications....................................................................... 6
Thank you for selecting the Floodline (FLD) DD-nn digital gas detector. This manual
provides installation and operation information. Please read before installing or
operating and retain for future reference.
FLD DD Gas Sensor 22.03.2022 Rev.0
3
Introduction
The Floodline DD-nn digital gas detector is designed to continuously monitor for the
presence of the specified gas. They are designed to be installed in hotels, offices,
public buildings etc. When the set concentration values are exceeded, the detector
generates a visual / audible alarm and changes the state of the output relay within the
DD-nn detector.
The unit also has RS-485 network capabilities for connection to the Floodline MDD-
256/T gas detection system which gives more detailed alarm information. Each sensor
has 3 alarm levels A1, A2 and A3 set at different levels depending on the type of gas
being detected.
The detector has a removable module with an intelligent semiconductor sensor, which
facilitates maintenance and lowers operating cost.
The sensor is available to detect 5 gas types which are defined by the ‘nn’number of
the device, the table below gives details for these codes and the A1 to A3 alarm levels.
The code number is clearly marked on the removable detection module.
Code Number
Detectable Gases
DD-11
Natural Gas/CNG, other hydrocarbon
A1= 10%, A2 = 20%, A3 = 30%
DD-14
Natural Gas/CNG (selective to CH4)
A1= 10%, A2 = 20%, A3 = 30%
DD-15
Propane/butane/LPG, other hydrocarbons
A1= 10%, A2 = 20%, A3 = 30%
DD-22
Carbon monoxide (CO)
A1= 20ppm, A2 = 100ppm, A3 ≥ 250ppm
DD-61
Chlorofluorocarbon (HFCs)
A1= 1000ppm, A2 = 2000ppm, A3 = 2500ppm
The main features of the detectors are:
•Long life, semiconductor gas sensor
•Ease of installation and connection (detachable terminals)
•RS-485 port (isolated) with Modbus RTU protocol (for connection to MDD-256)
•3 Standard alarm thresholds (A1, A2, A3 factory set)
•Relay output (set for A2 threshold as standard) NO/NC type (switch up to
30Vdc)
FLD DD Gas Sensor 22.03.2022 Rev.0
4
•Audible alarm (can be disabled with built in jumper)
•Sensor is removable, intelligent module
•Built-in microprocessor control for reliability and stability
•Stylish housing, for wall mounting cable back entry or mounting to a typical 1-
way pattress box or Ø60mm, flush-mounted box with screws at the edge
Installation
The detectors are designed to be wall mounted and 2 fixing holes are available in the
back of the unit for mounting to the support surface. The position of the sensor will
depend on the type of gas being detected and specific site conditions.
The diagram below shows the layout of the user terminal and their connection details:
RELAY 2A 30VDC
ALARM OUTPUT
08
07
06
NO
NC
COM
M + B- A+ GND
RS-485
POWER
01 02 03 04
NET
TEST
GAS DETECTOR
SENSOR
11 14 15 22 61
DD -
OFF ON
BUZZER
Relay removable terminals
Buzzer (with on-off jumper)
Mounting holes
Test/address set button
Comunication LED
Supply removable terminals
Lid release tab
Control LEDs
Alarm Power Fault
Alarm
Gas Sensor
Mounting
To access the unit, press firmly the top of the enclosure lid until the lid release tab is
released, or press the lid release tab with a screwdriver. The sensor module PCB can
then be removed in order to access the enclosure mount holes. Once mounted the
sensor module PCB should then be reinstalled.
Supply Connection
The supply connections are via the quick connect terminals, terminal 01 (m) is
connected to 0V and terminal 02(+) is connected to 24Vdc.
FLD DD Gas Sensor 22.03.2022 Rev.0
5
Relay Connections
The alarm status of the detector can be monitor directly using the relay outputs which
are clearly labelled;
•NO = Normally Open terminal 08
•NC = Normally Closed terminal 07
•COM = Common terminal 06
Floodline Multi Zone Panel Connection
If connecting to a Floodline Multi Zone Control Panel, then connections should include
resistors to simulate the monitoring characteristics of the Floodline Multi Zone Panel.
Figure below shows these connections and resistors needed:
RELAY 2A 30VDC
ALARM OUTPUT
08
07
06
NO
NC
COM
M + B- A+ GND
RS-485
POWER
01 02 03 04
Alarm
1 Meg.
4k7
Operation
Power Up
On power up the unit’s a self-test is performed. During the self-test, the audible alarm
sounds, the alarm, fault, Net and power indicators flash. Once the self-test is
completed, the sounder turns off and the power indicator flashes. The unit is now in
sensor setting period (approximately 1 minute). Once this settling period has elapsed
the power LED with stay lit, the detector is now in the standard monitoring mode.
Leak Detected
When the gas in the area being monitored goes above the threshold levels the system
will generate and alarm the table below gives detail of the alarm types:
FLD DD Gas Sensor 22.03.2022 Rev.0
6
Status
Alarm LED
Power LED
Fault LED
Relay
Buzzer
Normal
off
on
off
off
off
A1
flashing 1s
flashing
off
off
on
A2
flashing 0.5
flashing
off
on
on
A3
on
on
off
on
on
Fault
off
flash
flash
off
on
Once the gas concentration falls below the leak threshold the detector will automatically
reset.
Technical Specifications
Power supply
24V DC (range: 10 ÷ 30V)
Supply current
max 30mA @24V DC
Operating temperature range
from -5 C up to +45 C recommended,
-15 C to +50 C allowed periodically (<1h/24h)
Relative air humidity range
from 30% to 90% RH
Gas sensor
semiconductor type, in a removable module;
estimated life time in the clean air - about 10 years
Detectable gases
DD-11: Natural gas/CNG, other hydrocarbons
DD-14: Natural gas /CNG (methane selective);
DD-15: propane-butane/LPG, other hydrocarbons
DD-22: carbon monoxide, range 20 ÷ 1000 ppm
DD-61: HFC (Freon) type R134A, R407C or R410A
Interfering factors
hydrogen, alcohol (high concentrations), chloride, a
significant oxygen deficiency (<19% vol.), a large, rapid
increase in humidity,
long-term presence of gases with concentrations> 1% LEL
(combustible gases) or > STEL (toxic gases)
Alarm thresholds (standard)
ALARM = 2000ppm Freon R410A (DD-61)
or 100ppm CO (DD-22);
or 15 % LEL (combustible gases -DD-11,14,15)
Alarm threshold accuracy
15% rel. for the recommended calibration conditions
Threshold thermal stability
15% in range 0 C to 40 C
Long term stability
20% rel./year, not more than 30% in 3 years
Calibration interval
recommended: < 36 months
Communication port
RS-485isolated,MODBUSRTUprotocol;plug in connectors
Signaling: optical
lamps: LED –ALARM = red; POWER = green Fault Yellow
acoustic:
65dB/30cm, piezoceramic buzzer (switchable by jumper)
Relay output
NO/NC type; max 2A/30VDC; plug in connectors
Dimensions
100 x 80 x 30 mm, H x W x D
Housing, weight
ABS, IP30; approx. 90 g
This manual suits for next models
5
Table of contents
Other Andel Measuring Instrument manuals
