ELECTRICAL CONNECTION
Attention: undertrack cables are required to connect the
instrument to the mains.
The
Beta
752/CO
gas detector must be powered at 230 Vac using
terminals 1 and 2 (Fig. 3).
INSTALLATION INSTRUCTIONS
Use a screwdriver to undo the screw on the right-hand side of the
instrument and lift the cover (Fig 2).
Position the base correctly and fasten it on the built-in 3-module
box or on the wall, using the screws and dowels provided. Drill
holes in the wall with a 5mm bit for the dowels.
Fig.2
Fig.3
CONNECTING LOADS
There is a JUMPER in the
Beta
752/CO
gas detector for selecting
the type of load to be used:
N.O. position pulse output:
In the event of an alarm, terminals 8 and 9
remain closed for 2 seconds every minute
(perfect for normally open electric valves, fig. 5).
N.C. position constant output:
In the event of an alarm, terminals 8 and 9 remain closed
until the alarm stops (perfect for controlling the Normally
Closed electric valve at the same time as an external
electric load).
Do not forget that the electric valve must be installed on the gas
pipe outside the room to be controlled as it cannot protect against
leaks upstream.
A circuit breaker must be fitted that is able to disconnect the detector
from the power supply, in accordance with the European standard
IEC EN 60335-1.
CHARACTERISTICS OF THE OUTPUT
The
Beta
752/CO
detector has an output relay with voltage free
contacts; contact rating 8A 250Vac / 30Vdc.
The output consists of a relay with exchange contacts to which any
suitable load can be connected (Fig. 4).
RELAY OUTPU
Fig.4
Fig.5 -Example of jumper with N.O. contact (
PULSE OUTPUT
) and Normally
Open electric valve
.
BETA mod. 752/CO
JUMPER WITH N.O. CONTACT
(PULSE OUTPUT)
In the event of an alarm, it is possible to control any load powered
at 230Vac such as electric extractors, fans, buzzers, etc. (Fig. 5)
using the Normally Open contact of the relay output (terminals 8
and 9).
It is also possible to connect an electric valve which cuts off the
supply of gas in the event of an alarm. A N.O. 230 Vac electric valve
should be connected parallel to the electric load (Fig. 5) while a
N.C. 230 Vac electric valve should be connected using the Normally
Closed contact of the relay (Fig. 6).
GUARANTEE CERTIFICATE
TO COMPILE AND SEND IN CASE OF DAMAGE
DEVICE:
Beta
752/CO
Serial number (s.n.)_________________________________________
DEALER
Stamp:
Date of purchase:
_____/_____/_____
USER
Surname and name _________________________________________
Address _____________________________________ n°__________
Postcode ________________ Town/city ________________________
Telephone_________________________________________________
INSTALLING THE INSTRUMENT
The instrument
MUST BE INSTALLED
:
- Within easy reach (at a height of about 1.5 m), see Fig. 1.
- At a distance of between 1 and 4 metres from the flame that could
be a possible source of CO.
- If possible, in every room where there is a combustion appliance
(stove, gas boiler, heater with natural draught, etc.).
The instrument
MUST NOT BE INSTALLED
:
- In corners where there is no free circulation of air.
- Near walls or other obstacles that could prevent the flow of gas
from the flame to the detector, or extractors and fans that could
divert the flow of air.
- In environments where the temperature could exceed 40°C or
fall below – 5°C.
- In environments where there is a high level of humidity or steam.
Fig.1
Installation of the
Beta 752/CO gas
detector
1,5 m
1-4 m
1 2
7 8 9
NC C NA
230Vac 50Hz
1
2
230 Vac
230V/50Hz
NA
C
NC
1 2 7 8 9
7
N.O. MANUAL RESET VALVE
