P81 - Gas detector Fantini Cosmi - Free user manual and instructions

Product Type	Gas Detector
Brand	Fantini Cosmi
Model	P81
Category	Gas Detector
Detected Gases	Natural gas (methane) and LPG (propane/butane)
Power Supply	230 V AC (mains powered)
Backup Battery	9 V alkaline battery (optional)
Alarm Type	Audible (85 dB at 1 m) and visual (red LED)
Alarm Threshold	10% LEL for methane, 20% LEL for LPG
Dimensions (H x W x D)	120 x 80 x 30 mm
Weight	200 g
Operating Temperature	-10°C to +50°C
Operating Humidity	0% to 95% RH (non-condensing)
Installation	Wall-mounted, near potential gas sources (boiler, cooker, etc.)
Test Function	Press "Test" button to simulate alarm
LED Indicators	Green (power), Red (alarm), Yellow (fault)
Maintenance	Vacuum clean grille every 3 months; test weekly
Compliance	EN 50194 (Europe)
Lifespan	5 years from power-on date
Warranty	2 years (manufacturer)

Frequently Asked Questions - P81 Fantini Cosmi

Where should I install the P81 gas detector?

Install the detector in the same room as gas appliances, on the ceiling for natural gas (lighter than air) or near the floor for LPG (heavier than air). Avoid corners, vents, and humid areas.

How do I test the gas detector?

Press the Test button on the device. The alarm should sound within 3 seconds. If not, replace the detector or check power.

What should I do when the alarm sounds?

Do not use any electrical switches. Open doors and windows, turn off gas supply, leave the premises, and call emergency services from outside.

Does the P81 have a backup battery?

Yes, it has a compartment for a 9 V alkaline battery (not included) for power backup during mains failure.

How often should I clean the detector?

Clean the detector grille every 3 months with a soft brush or vacuum cleaner to ensure proper gas flow.

What is the lifespan of the P81?

The detector has a lifespan of 5 years from the date it is first powered on. Replace it after this time.

How do I know if the detector has a fault?

A yellow LED will light up and the unit may beep intermittently. This indicates a sensor failure or end of life.

Can the detector be hardwired or plugged in?

The P81 is designed for direct connection to 230 V AC mains wiring. It should be installed by a qualified electrician.

What gases does the P81 detect?

It detects natural gas (methane) and LPG (propane/butane). It is not designed for carbon monoxide or smoke.

Why does my detector give false alarms?

False alarms can be caused by high humidity, paint fumes, alcohol, or cleaning solvents. Ensure proper ventilation and location.

USER MANUAL P81 Fantini Cosmi

Electronic control unit for gas leak detection with 1 detection zone

Electronic control unit for gas leak detection in industrial environment, suitable for controlling and signaling dangerous gas concentration in the air, specifically for detecting methane gas, LPG and carbon monoxide.

Dimensions (mm)

Power supply

Contacts rating

Connected sensors

Operating ambient temperature

Protection degree

P81 12 Vac or 12/14 Vdc 5A - 250V 1 - 10 ÷ 50 °C IP40

ELECTRICAL CHARACTERISTICS

Power supply: 12 Vac/dc ± 10%.

Absorption:

■ approximately 160mA (320mA) with a single probe;
■ 460mA (620mA) with faulty probe and output.

Connection with 2 terminals of 2.5 mm ^4

Protection: input - fuse power supply 1A 5x20mm.

1 input for sensors S81, S82, S83, or probes ATEX S84, S85, S86 (different gas types).

Connection to the probe with 3 terminals of 2.5 mm²: C (-12...24V); S (+4...20mA); A (+12...24V).

Maximum connection length 50 m.

Section of 3 conductors: 1.5 mm².

Outputs connections:

■ n.3 terminals of 2.5 mm² for relay C-NC-NO;
n.2 terminals of 2.5 mm ^4 for open collector.

Complies with the standards EN 61779-1-4; CEI 216-5/1 Directives/Norms EMC EMC 89/336/CEE, Norm EN 50270

CE EAC

INSTALLATION

Rear panel mounting on Omega DIN EN 50022 rail.

It can be installed on the bottom panel or DIN modular panels.

To ensure the proper protection degree of the device is necessary to install the unit in an electric box created according to current regulations for the workplace and within which can also be housed the power supply system.

OPERATION

P81 control unit allows you to connect a probe model S81-82-83 or ATEX S84, S85, S86 probes for the construction of gas detection systems in environments such as boiler rooms, garages, warehouses, workshops, etc., with the possibility to control a solenoid valve or an auxiliary device (siren, flashing light, extractor, etc..) through inside alarm relay.

The control unit must be powered at 12 Vac/dc.

The functioning logic, selected by means of jumper E1, can be either positive or negative. The device reports its operation status through the LED.

According to the selected logic through the jumper E1, in normal situation (no alarm), the led, the failure signaling output and the relay, are:

■ positive logic: led switched on, relay energized, failure signaling output = ON;
- negative logic: led switched off, relay not energized, failure signaling output = OFF.

In case was selected the negative operation logic, the alarm relay can be controlled continuously or pulsed, depending on Jumper E2 position:

Position A positive logic

Position B negative logic

Position A alarm relay continuous control

Position B alarm relay pulse control

A
B

E

A
B

[Unrecognizable Symbol]

A
E

E

A
B

E2

A
B

E2

A
B

E2

Once it was received the proper power supply, the control unit performs in sequence the following steps:

TESTING THE LED AND THE BUZZER (APPROXIMATELY 5 SECONDS)

Whatever the selected logic, the LEDs are starting to light in sequence and the buzzer emits a short beep.

PROBE PREHEATING (APPROXIMATELY 1 MINUTE)

During this phase, which allows the probe to reach the correct operation temperature, the detection system is not functioning.

FUNCTIONAL TEST (ABOUT 3 MINUTES)

Once the probe preheating phase has finished, the device enters under functional test phase. During this phase all internal timings are resetted in order to facilitate probe operation verification (alarm simulation).

During normal operation of the control unit is activated the gas alarm monitoring, as well the self-diagnoses for installation failures (probes) and of the system (control units). In this phase and in the absence of the alarm and the anomaly, the control unit is presented as shown in the table on the right.

INTERFACE POSITIVE LOGIC NEGATIVE LOGIC

Power supply led Green Switched ON Switched ON
Failure led Yellow Switched ON Switched OFF
Gas alarm led Red Switched ON Switched OFF
Alarm buzzer No sound	No sound
Alarm relay	Energized	Not energized
Failure output	ON	OFF

In the presence of dangerous gas concentrations, the unit enters in gas alarm phase and performs the following operations, indicated in the table on the right.

INTERFACE POSITIVE		NEGATIVE LOGIC
	LOGIC
Gas alarm led Red Switched OFF Switched ON
Alarm buzzer Continuous sound Continuous sound
Alarm relay Not energized	Energized (continuously	or pulsed according to e2)
failure relay	ON	OFF

Once the gas alarm condition was surmounted is necessary to bring the control unit in normal operation condition.

For this purpose must be pressed the "RESET/TEST" button, situated on the front.

In the presence of a failure (probes and/or control units) the control unit will be represented like in the table on the right.

INTERFACE POSITIVE LOGIC NEGATIVE LOGIC

Failure led Yellow Switched off Switched on
Alarm buzzer Intermittent	Sound	Intermittent Sound
Failure output OFF ON

Once the possible failure was eliminated, is

necessary to bring the control unit in normal operation condition. For this purpose must be pressed the "RESET/TEST" button, situated on the device front.

It is recommended to repeat the procedure of operation verification at least once a year, or after a prolonged shutdown period, and anytime when is replaced the probe.

The average life time of S81-S82-S83 probes and S84-S85-S86 is 5 years from date of installation. It is mandatory to replace them before the expiry of 5 years of use.

The average life time of the probes is calculated taking into consideration a typical use in a normally free of contaminants (gases, thinners, etc.) environment. A more frequent presence and in higher concentrations of these substances can accelerate the normal oxidation process of the sensing element, resulting with its life time decrease.

TECHNICAL FEATURES

Light signals:

■ 1red LED, power supply ON;
■ 1 yellow LED, failure;
■ 1 red LED, gas alarm.

Acoustic signals:

■ 1 buzzer with sound intensity >60db at 1m.
■ 1 button to reset the alarms and for testing the probe.

Self-extinguishing plastic housing.

Dimensions: 105 x 90 x 58 mm - 6 modules complies with DIN 43880 standard.

Unit weight: 0,185 kg.

Rear panel mounting on Omega DIN EN 50022 rail.

Protection: IP20; IP40 when is properly installed in an electrical box.

Environment temperature: 0 ÷ 50^ .

Environment humidity ±90% U.R. without condensation.

S81

Sensor for methane gas detection.

S84

Probe for methane gas detection, certified with ATEX II 2G Ex d IIC T6.

S82

Sensor for LPG gas detection.

S85

Probe for LPG gas detection, certified with ATEX II 2G Ex d IIC T6.

S83

Sensor for carbon monoxide detection.

S86

Probe for carbon monoxide detection, certified with ATEX II 2G Ex d IIC T6.

S80

Emergency signaling device with fixed light and continuous sound.

ZD...

Normally closed electromagnetic valves, with quick closing and opening, class A with approval.