Bosch 4306 Service Manual download pdf (Page 23)

• DOK-POWER*-KDV*2.3****-ANW1-EN-E1,44 • 06.97

Heat loss occurs when the KDV 2.3 is operated. This is caused by basic losses

during signal voltage generation, power losses and by energy transformation

in the bleeder.

The heatsink, which conducts this heat loss, is mounted to the back of the KDV

2.3. This means the KDV 2.3 is mounted with the heatsink sticking out of the

back of the control cabinet.

Note that the heatsink must maintain a safety clearance of 30 cm

from flammable materials or parts which could be affected by heat!

Heat loss

3. Guidelines for installation and electrical connections

The heat loss occurring within the control cabinet can be reduced to about

150 W with the above mounting mode. This means that more compact control

cabinets can be built. It also eliminates or minimizes the additional work due

to control cabinet air conditioning.

A bleeder cover SH-KD ist needed for the air duct and to cover the bleeder.

The heatsink blower can be ordered, with accessories, using order no. LE3-

... (LE3-220 with 220 V, LE3-115 with 115 V).

If several heatsinks are cooled in a common air duct with only one central

blower used, then make sure that there is sufficient air! Check air stream Q!

completely sealed housing or

cabinet

heatsink

Heat loss

air duct

external

internal

Kühlart

blower motor

air current

heatsink blower

KD...

Vint

Vext

Q = 32 l/s

max

= 50 Pa

air

= 3...4 m/s

Figure 3.14: A break down of the heat losses

Cooling with a heatsink

blower

Heat loss in the control

cabinet

Cooling with a central

blower

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 56 57

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Bosch 4306 Service Manual Page 23

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