CALECTRO UNIGUARD UG-2-A2 User Manual

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UNIGUARD UG-2-A2 STAND-ALONE-UNIT

Smoke detector for duct installation.

- One-tube air sampling system

- Service alarm

- Test hole on cover

- Simple installation

- Sensitive flow indication

- Filter for dusty environments

- Simple service and maintainance

- Installer-friendly connection of cables

- Foolproof mountage of sampling tube

- Reset button on front cover

- Built-in alarm relay

FUNCTION

Uniguard has been developed to detect smoke in ventilation
ducts and combines a smoke detector and an adaptor system
where both tube and housing are specially designed for
optimum airflow through the smoke detector.
The system fulfils all the requirements for safe fire detection
with airflow speeds from 0,2 m/s to 20 m/s.
Uniguard has a built-in alarm relay to control fire-safety
dampers, to stop ventilation fans, or to activate accoustic and
optical alarms etc.
The service alarm let you know when maintenance is needed,
before a false alarm occur.
The detector has a bayonet fitting to simplify mounting and
removal.
A contaminated detector will result in increased sensitivity
and false alarms. To avoid nuisance alarms the detector has
a service alarm (green LED). This indicates that the detector
should be cleaned.

BASIC PRINCIPLES FOR POSITIONING

For the airflow through the adaptor to be representative of the
airflow in the ventilation duct, install the detector at a place
where normally flow meters etc. should be mounted, please
see our installation instructions.
You can also use your national or local rules for mountage
according to "Methods for measuring airflow in ventilation
systems".

ACCESSORIES
Filter: F1- UG /10 pack
Mounting bracket: UG-Beslag

(For insulated/circular ducts)
Waterproof housing: UG-SH for outdoors, in
cold attics etc.

TECHNICAL DATA
Detector type: Ionisation - UG-2-A2I

Optical - UG-2-A2O

Voltage Supply: 24VAC 100 mA ±20%
Operating temperature: -10°C to +50°C
Maximum humidity: 99% rH
Tested and approved
according to EN-54: by LPC (England), VdS (Germany)
Service alarm: Indicated with green LED
Fire alarm: Indicated with red LED
Adaptor housing: ABS
Air sampling tube: Aluminium. Standard length

0,6 m. Hole diameter 35mm.
The length of the venturi pipe shall
be choosen based upon how wide
the ventilation duct is. The venturi
pipes are available in 3 lengths;
0,6, 1,5 and 2,8 m. When the ven­ tilation duct is wider than 0,6 m
(dia), the venturi pipe should pen­ etrate the whole duct.
Please see enclosed sketch.

Shorten the pipe to correct length.

Insert the end plug.

Put on the end plastic
gasket.

Put on the rubber
gasket, TET 26-35.

Drill a hole
Ø 50 mm.

NOTE!

Drill a hole
Ø 35 mm.

Diameter of the duct bigger
than 0,6 m.
The venturi pipe should
penetrate the whole duct.

Drill a hole
Ø 35 mm.

Max diameter of the duct 0,6 m.

Use the venturi pipe 0,6 m.
Shorten the pipe, if necessary.

For ducts with a ø of less than 0,6 m use the 0,6 m tube.
For ducts with a ø of between 0,6 m and 1,3 m use the 1,5 m tube.
For ducts which are larger than 1,4 m use the 2,8 m tube.

The ventur i pipe shall not
protrude more than 30 mm
through the duct wall.

Phone: [phone] Fax: [phone] [e-mail] www.calectro.com

UNIGUARD UG-2-A2 STAND-ALONE-UNIT

Smoke detector for duct installation.

DIMENSIONS

(mm)

INSTALLATION

The venturi tube is made of aluminium and can easily be
shortened to suit the diameter of the duct. Hole diameter is 35
mm. With insulated or circular ducts - use the mounting bracket,
hole diameter is then 50 mm.

MAINTAINANCE

When the detector becomes contaminated, sensitivity is
increased, triggering the service alarm. This can be avoided
for a considerable time by cleaning the detector once a year
with a vacúum cleaner.

CHECKING AIR FLOW

The detector is equipped with a flow indicator which oscillates
in the air stream when the detector is correctly installed. This
gives simple confirmation that there is no leakage, and that air
from the ventilation duct is flowing through the detector.

FUNCTION TEST

When installation is complete, the detector should be tested.
This can be carried out with smoke or suitable testspray for
example RDP-300 (from Calectro), use the test hole on cover.
D o not forget to refit the plastic plug after test.

NB: When installing outdoors or in cold attics etc., where
there is a risk for condensation, this requires that the detector
is insulated from the surrounding air by means of for example
our waterproof housing UG-SH, and marked with an extra
indicator lamp, LED-01 and a sign marked "Hidden Detector".

FUNCTION

Normal operation: In normal operation the alarm relay
is energized, and the relay contacts
are closed between C and NC.
Smoke alarm: The LED of the detector is showing
red light and the relay contacts are
changing to C and NO.
Reset: After alarm the reset push-button has
to be pressed in order to have the
detector back into normal operation.
Pre-alarm: When the detector is sensing smoke or

is dirty the LED of the detector will first
show green colour before going into
alarm with red light. If the detector is
dirty, it will show green light. This is
an optical indication (a pre-alarm or
service-alarm) which means that the
detector is contamined and if it is not
cleaned, it will later on give a false

alarm.
Failure: If there is something wrong with the
detector, the alarm relay will change
contacts:
a) If the detector module is taken away
b) If the supply voltage is interrupted

WIRING DIAGRAM

Alarm relay: ONE changing contact,
max 250V, 2Amp

Note!
Changing between AC and DC is made by a jumper.

The jumper is factory set to AC.

External
reset button

Supply 24 VADC 100mA (±20%)

Alarm
output

NC

NO

C

= 24 VDC

= 24 VAC