Tecnogas Crd/1 User manual

CRD CONTROL UNITS FOR GAS AND FIRE DETECTION REV.1 072022

TECNOGAS CRD control units are produced in 4 versions:

• CRD/1 with one zone in 3 DIN module box

• CRD/2 with two zones in 3 DIN modules box

• CRD/3 with three zones in 6 DIN modules box

• CRD/4 with four zones in 6 DIN modules box

TECHNICAL FEATURES CRD 1-2 CRD 3-4

Power supply (see speciﬁcations below) 230 Vac - 12 Vac - 12 Vdc

Sensor lines voltage 12 Vdc 12 Vdc

Number of lines 1-2 3-4

Smoke sensors per line Max 10 Max 10

Gas detectors per line Max 1 Max 1

Load limitations 0.6 A 1.1 A

Alarm relay C NO NC 10 A 1 1

Acoustic signal at 1 m 10 db a 12 V a 30 cm

Alarm LED (red) 2 4

Detector fault LED (yellow) 2 4

Power LED (green) 1 1

System failure LED (yellow) 1 1

End of line resistance* 3300 Ω 3300 Ω

*Included in the box

WARNING!

THE INSTALLATION OF THE GAS DETECTOR DOES NOT EXEMPT

FROM THE OBSERVATION OF ALL THE RULES REGARDING

THE CHARACTERISTICS, THE INSTALLATION AND USE OF THE

GAS APPLIANCES, THE VENTILATION OF THE ROOMS AND THE

DISCHARGE OF THE COMBUSTION PRODUCTS PRESCRIBED BY

THE REGULATIONS AND LAWS IN FORCE.

The CRD/1-2-3-4 control units are designed to

be housed in a DIN bar. They can manage remote

detectors for gas detection (methane [CH4] and

LPG) or for ﬁre.

They are extremely reliable and easy to use and

install.

The CRD control units can be used with remote

gas detectors produced by TECNOGAS (RMP) or

with any 4÷20 mA sensor.

The CRD control units work with a power

supply voltage of:

• 230 Vac with internal stabilized power

supply, protected against short-circuits and

overloads;

• or 12 Vac (code 554411 - 554413 - 554416

and 554418) with external power supply;

• or 12 Vdc with external power supply

(exclusively for codes 554431- 554433 -

554436- 554438).

The CRD control units are managed by a

microcontroller. They have been designed to

snap action with a 4÷20 mA signal and allow the

connection of a remote gas detector or up to ten

smoke sensors per line.

They have an alarm relay, a buzzer and two LEDs

for visual signals:

• a green LED relating to the power supply

(POWER)

• a yellow system FAULT LED, in compliance with

the new European standards EN 50271.

The CRD control units have:

• visual reference signal for each connected

remote detector: red for ALARM and yellow for

FAULT

• an overcurrent protection circuit for the power

supplies of the remote detectors. This circuit

intervenes either on the pair of remote detectors

or on the single remote detector, according to the

type of control panel. For example: in the CRD/1

control unit the protection intervenes on the single

detector; in the CRD/2 control panel it intervenes

on the pair of remote detectors, etc.

Note for the installation of remote gas detectors

(detector for methane and LPG protected against

water splashes IP55): the gas detectors require

the connection of a 3.3 KΩ end-of-line resistor

between the + and S connections of the terminal

board supplied to the same; the latter will serve

to avoid a false sensor anomaly being reported.

See the diagram below and the remote gas

detector documentation. The same caution must

be observed if the remote detectors set up for the

chosen control panel model are not connected.

In this case, the end-of-line resistor will be

positioned between the + and S connections of

the terminal board of the control unit itself.

EXAMPLE:

4-zone control unit used with 3 zones (insert a

resistance also in the fourth zone).

Gas detection systems: if, following an alarm,

the gas concentration returns below the alarm

threshold, the CRD control units return to

normal working conditions (buzzer and relay

at rest) but the alarm signal that occurred

with relative ignition remains of the ﬂashing

red LED.

On the front of the control units there are the reference visual signals for the control unit itself and for the connected detectors.

VISUAL SIGNALS

FUNCTIONAL DESCRIPTION

TECNOGAS srl - Viale L. Da Zara, 10 - 35020 Albignasego - Padova - Italy

T. +39 049 8625910 - F. +39 049 8625911 - [email protected] - www.tecnogas.net

CRD CONTROL UNITS FOR GAS AND FIRE DETECTION

SIGNALS REFERRED TO CRD 1 - 2 - 3 - 4 CENTRAL UNITS

SIGNALS REFERRED TO RMP REMOTE DETECTORS

ELECTRICAL CONNECTIONS

WARRANTY

GREEN LED (POWER) A: indicates the correct power supply of the device.

YELLOW LED (FAULT [FAULT] SYSTEM) B: indicates a malfunction of the CRD control unit or the microcontroller.

RED LED (ALARM) C: turns on when the alarm threshold is exceeded and stays on until the control unit is reset by pressing the TEST / RESET key.

YELLOW LED (FAULT [FAULT] SYSTEM) D: lights up in case of faulty sensor, interrupted line (open circuit); blinks 6 months before the sensor reaches its

expiration date and stays on steadily after expiration. The sensors have an end of life after 5 years from installation, an expiration that is anticipated

by the system in the event of premature deterioration of the sensor due to humid, greasy and dusty environments.

The CRD control units signal the achievement of an alarm threshold as soon as the sensor reaches the alarm state. Following the signal, the red ALARM

LED relating to the sensor in alarm will light up, the relay will activate, blocking the gas ﬂow and a buzzer will emit an intermittent sound. The acoustic and

visual signals and the relay will remain active until the TEST / RESET button is pressed. If the alarm conditions remain after pressing the key, the control

unit goes back to the alarm state.

The TEST / RESET key has two functions:

• if it is simply pressed and released, it allows the alarms to be reset;

• if it is pressed for 5 seconds, the control unit checks its operation and for 1 second all the anomaly and alarm signalling LED and the buzzer light up.

In case of persistence of an alarm or a fault, the signals will return to highlight the alarm or fault even after the memory has been cleared.

NOTE FOR INSTALLERS:

After 5 years of installation (a date that can be anticipated due to premature deterioration of the sensor in humid, greasy and dusty environments), the

sensors reach the end of their life. Approaching the deadline is signalled 6 months earlier with the ﬂashing of the FAULT LED (yellow). On expiry the LED

remains always on. To clear the sensor expiration memory, perform the following operations:

• all sensors connected to the control unit and any “plug” resistors are disconnected;

• press the TEST / RESET button for 5 seconds;

• the FAULT LEDs will ﬂash quickly for a few seconds to indicate that the sensor expiration memory has been cleared and then they will remain on because

the sensors are disconnected;

• connecting the new sensors and any “plug” resistors, the “FAULT” LEDs will switch off.

TERMINAL BOARDS

230Vac: 230Vac power supply input

12Vac: 12Vac power supply input

12Vdc: 12Vdc power supply input

C NO NC / ALARM: free exchange alarm relay output (max 10 A)

S1 ... S4 / DETECTORS: S inputs for detections from the detectors

+ - / DETECTORS: 12 Vdc detector power supply

(these outputs should only be used to connect the detectors).

To connect the detectors, refer to the table for the section of the cables to be used:

Note for the installation of smoke detectors:

smoke detectors require the connection of a 3.3 KΩ

end-of-line resistor; the latter will serve to avoid a

false sensor anomaly being reported. The diagram

shown above is a principle diagram, for more details

please refer to the document on the packaging of the

smoke detectors you will install.

The equipment is guaranteed for a period of 12 months from the date of purchase.

CONDITIONS: free replacement of components recognized as defective by the factory. The equipment must be sent to the retailer or alternatively directly

to TECNOGAS srl Viale L. da Zara 10 - 35020 Albignasego (PD), carriage paid. The warranty excludes failures due to tampering by unauthorized personnel,

carelessness in use or resulting from incorrect or improper installations and caused by phenomena unrelated to the normal operation of the appliance. We

are not liable for any damage, direct or indirect, caused to people or things by damage to the product or consequent to the forced suspension of use of the

same. For any dispute, the competent court is that of Padua.

line conductor section table

Cable section mm2

M line Smoke detectors Gas detectors

50 0.50 0.75

100 0.75 1

200 1 1.50

300 1.50 2.50