Bosch Appliances 3122 475 22015en manual Planning radiators, Cabling

INTEGRUS Installation and User Instructions System description and planning en 8

Guaranteed rectangular footprints can also be calculat- ed with the footprint calculation tool (available on the documentation CD-ROM). The given values are for one radiator only, and therefore do not take into con- sideration the beneficial effects of overlapping foot- prints. The beneficial effects of reflections are also not included. As rule of thumb can be given for systems with up to 4 carriers, that if the receiver can pick up the signal of two adjacent radiators the distance between these radiators can be increased by a factor 1.4 approximately (see figure 1.22).

R1R2

R1	R2
W	1.4 W
R3	R4

R3R4

L

1.4 L

Figure 1.22 The effect of overlapping footprints

50m

50m

50m

50m

Figure 1.23 Radiators with equal cable length

When radiators are loop-through connected, the cabling between each radiator and the transmitter should be as symmetrical as possible (see figure 1.24 and figure 1.25). The differences in cable signal delays can be compensated with the signal delay compensa- tion switches on the radiators.

1.4.2 Planning radiators

Use the following procedure to plan the radiators:

1.Follow the recommendations in section 1.3 in order to determine the positioning of the radiators.

2.Look up (in the table) or calculate (with the foot- print calculation tool) the applicable rectangular footprints.

3.Draw the rectangular footprints in the lay-out of the room.

4.If the receiver can pick up the signal of two adja- cent radiators in some areas, determine the overlap effect and draw the footprint enlargement(s) in the lay-out of the room.

5.Check whether you have sufficient coverage with the radiators at the intended positions.

6.If not so, add additional radiators to the room.

See figure 1.15, figure 1.16 and figure 1.17 for examples of a radiator lay out.

1.4.3 Cabling

Signal delay differences can occur due to differences in the cable length from the transmitter to each radiator. In order to minimize the risk of black spots, use equal cable length from transmitter to radiator if possible (see figure 1.23).

Figure 1.24 Asymmetrical arrangement of radiator

cabling (to be avoided)

Figure 1.25 Symmetrical arrangement of radiator cabling (recommended)

Bosch Security Systems 2005-04 3122 475 22015en