3
5.5
For installing the detector body, place it onto the base as shown in Figure 5 (
А
) and rotate clockwise until reaching into the guiding grooves. Then
rotate it until rest as shown in Figure 5 (B).
A
B
Figure 5
5.6
For releasing the detector, insert the key (Figure 4, Position 3) into the slot (Figure 4, Position 4), push inward and in the same time rotate the detector
body counterclockwise. Then remove the key from the slot and rotate the detector body further in the same direction until it is separated from the base.
5.7
Mounting and dismounting can only be carried out with the equipment in de-energized state.
6
WIRING
6.1
The detectors, along with VUOS-31 remote indicators or without them, are electrically wired into the alarm loops of control and indicating equipment
per the schematic shown in Figure 6.
In general for generating events
Fire Alarm 1
(
Pre-Alarm
) and
Fire Alarm
in two-threshold alarm loops, an additional resistor is to be brought in
series with the detector. DIP-31 have already had additional resistors built in within them, which facilitates mounting the detectors for their operation with
fire control and indicating equipment (units) such as Signal-10, S2000-4, Signal-20P, S2000-ASPT, Signal-20
М
, Signal-20.
6.2
While connecting the detectors into alarm loops of fire alarm and control units Signal-10, Signal-20P, S2000-4 and devices Signal-20M, S2000-ASPT
as per Figure 6, the following types of alarm loops can be assigned:
1: Fire Smoke (two-threshold);
2: Fire Combined (single-threshold).
For both cases the end resistor in a loop is Rt = 4.7K Ohm.
6.3
The detector is protected against reverse polarity of connecting alarm loops.
6.4
Wiring shall be carried out with the equipment in de-energized state.
6.5
When connecting wires, it is advised to use cable shoes.
Figure 6
The detector provides indication of the following conditions by means of two red built-in visual indicators as follows:
QUIESCENT CONDITIONS: Flashing once every 6 s;
PREALARM: Two flashes every 6 s (when two successive measured levels of sensing chamber signal are 75% of the fire condition level);
FIRE ALARM: Light steadily;
CONTAMINATED CHAMBER: Three flashes every 6 s (if the signal level has slowly reached 75 percent of the maximum contamination level. Drift
compensation is performed every 24 hours).
FAULT: Four flashes spaced 200 ms apart every 6 s (if the measuring function of the detector is out of order).
7
TESTING
7.1
Apply power to the control and indicating equipment to which loop the detector is connected. The control and indicating equipment should be known
good device.
7.2
In the absence of smoke, the detector is in the quiescent conditions, red light emitting indicators flashing once per 6 s.
7.3
To check the detector response, present the can with aerosol simulated smoke to the sensing chamber of the detector and release a single burst of
smoke agent. Not later than 40 s after exposure to aerosol the detector shall go into the fire alarm conditions, the detector’s light emitting diodes starting to
light steadily. The fire alarm shall be received and indicated by the control and indicating equipment.
Note:
For testing smoke detectors you are advised to use aerosol smoke products such as Smokesabre 01-001, CHEK01-001, or similar.
7.4
A more simplified functional test can be conducted by lighting one of the detector’s LEDs or the LED of the connected remote indicator VUOS-31
with the laser beam of the remote test unit. The detector will go to the fire alarm conditions. The distance between the remote test unit and the illuminated
LED shall be at least 0.5 m.
Note:
A VUOS-31 remote indicator with the red LED (and colour free LED cap) is suitable for testing with a laser tester. Other remote
indicators can be not suitable for this purpose.
7.5
If no fire alarm is registered by the control and indicating equipment, or light emitting indicators operate in a way which differs from the specified
one, the detector is unhealthy and shall be replaced.
W A R N I N G !
Prior to testing the detector’s operability in an actual fire alarm system, disconnect outputs of the control and indicating equipment that control
fixed fire suppression systems, voice announcement systems, general ventilation and smoke control systems.
