urmet domus 826 DIGITAL CALL SYSTEM, Manual

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826
Systems with a (theoretical) maximum of 899 secondary
entrance panels
This type of system features:
•
One or more main entrance panels.
•
One guard door switchboard station (optional).
•
Up to 899 secondary entrance panels (i.e., one for each housing unit
in a row of single-family units).
•
Up to 899 groups of apartment stations.
Each apartment station must be assigned a unique numeric code in the
format SSSN, where SSS is a number between 101 and 999 (in reality,
SSS can also assume the values 1,2..100, but it is advisable not to use
them so that all apartment stations can be coded with four digits) which
identifi es the secondary entrance panel associated with the apartment
station concerned, and N is a number between 1 and 9 which positively
identifi es the apartment station in its group. All main and secondary
entrance panels and the guard door switchboard station (if provided)
must be confi gured for installation TYPE 3 (see below).
SYSTEM DESIGN
Each system must have an appropriate URMET DOMUS Installation
Diagram, which must be retained for system inspection and for
future reference. The Installation diagram should be selected on the
basis of the customer’s specifi c needs and requirements, avoiding
changes as work proceeds which could jeopardize installation quality.
The installation diagrams enclosed with this manual cover the most
frequently used types of system. For particularly complex systems
or special requirements, contact the URMET DOMUS local agent or
engineering consultant.
SYSTEM INSTALLATION
The system must be installed in accordance with accepted engineering
practice. Consequently, it is necessary to comply with:
• Applicable CEI standards
• The surrounding electrical environment (i.e., sources of potential
interference).
• System extension.
DEVICE LOCATION
Where one or more devices must be located in damp areas or sites
where they could be exposed to the weather, it is essential that they
be placed in sealed, watertight containers.
Indoor devices should be installed in fl ush mounting back boxes
separated from those used for telephone systems, electrical
installations, TV antennas, etc.
DEVICE WIRING
Digital Call System devices are provided with removable terminal
blocks to facilitate maintenance and troubleshooting. Terminal blocks
are removed by pulling upwards.
The maximum conductor cross-section that can be accommodated in
a single terminal block is as follows:
•
1 mm 2 for stranded core wire.
•
1.5 mm
2
for solid core wire.
Where conductors with larger cross-sections are used in the system,
they must be spliced to conductors of appropriate size for connection
to terminal blocks.
Wire must be stripped for a length of 5 to 6 mm using an adjustable
professional-type wire stripper.
Where stranded core wires are used, it is essential that they be twisted
to ensure that disconnecting terminal blocks will not cause wires to
protrude, with the resulting risk of accidental short circuits across
adjacent conductors. If solid core wires are used, devices must be
secured by means of screws or wall plugs so that they cannot move
and break conductors.
All conductors connected to a terminal block should be bound together
with a tie wrap, as this makes for a neater appearance and sturdier
wiring.
NEVER join several conductors under the same terminal clamp, even
if their cross-sections are small. Cap or screw terminals must be used
for this purpose.
IMMUNITY TO INTERFERENCE
The second-generation Digital Call System features a high level
of intrinsic immunity to static and impulse type electromagnetic
interference, and meets Level 3 requirements of IEC 801-2 and 801-4.
However, several fundamental rules must be followed in order to
improve interference insusceptibility.
1) Conductors for the riser cable and for doorphone branch lines must
be routed at a minimum distance of 30 cm from all power lines
1011
÷
1019
(Max. 99)
CODES
S S N N
where:
SS = 11 to 99
NN = 01 to 99
Max. 8811
(89x99)
TYPE 3
1
1021
÷
1029
(Max. 99)
2
9991
÷
9999
(Max. 99)
899
Max: 899
Guard door
switchboard
station
(optional)
999 Max.
Model 826 DIGITAL CALL SYSTEM
SYSTEM DESIGN - SYSTEM INSTALLATION
M
odel
826
DIGI
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MT124-019