Venting The Heatsinks Of The Sinamics Power Units - Siemens SINAMICS S120 Manual

5.4.1.3

Venting the heatsinks of the SINAMICS power units

In some devices, the cooling circuit has to be vented when it is being filled, depending on the
device type and the frame size.
● It is not necessary to vent the heat sinks on Active Interface Modules, frame size JXL, on
Active Line Modules, frame size GXL and on Motor Modules, frame sizes FXL and GXL
before they are filled for the first time.
● The heat sinks on Basic Line Modules, frame sizes FBL, GBL, on Active Line Modules,
frame sizes HXL, JXL and on Motor Modules, frames sizes HXL, JXL must be vented
before they are filled for the first time.
– For this purpose, the devices are fitted with a vent valve at the top and a vent hose at
– A stopper is inserted in the lower end of the vent hose at the factory. This must be
1. Hold the venting hose outside the cabinet in a bucket, see Chapter "Venting the
components (Page 127)".
2. Open the vent valve at the heat exchanger so that air can escape.
Continue venting until clear cooling liquid escapes in a steady stream from the vent hose.
3. Close the vent valve.
Danger of injury caused by spray water
The coolant is harmful to eyes and skin and can damage surfaces.
If the air escapes intermittently, coolant spray can come into contact with your skin or eyes.
• Therefore, use appropriate protective clothing for all work on the converter. However, if
• Please refer to the EU safety data sheet of the coolant manufacturer.
Venting the heat sink with removal of the front electronic fan
On the following Basic Line Connection Modules the front electronic fan must be removed in
order to operate the venting lever in the Basic Line Module:
● 6SL3735-1TE41-2AA3 (380 ... 480 V, 1220 A, 600 kW)
● 6SL3735-1TE41-7AA3 (380 ... 480 V, 1730 A, 830 kW)
● 6SL3735-1TG41-3AA3 (500 ... 690 V, 1300 A, 1100 kW)
● 6SL3735-1TG41-7AA3 (500 ... 690 V, 1650 A, 1370 kW)
Cabinet Modules liquid cooled
Equipment Manual, 04/2020, A5E37067587A
the bottom. The air and/or coolant can be bled out of the device via this hose and
collected underneath so that it cannot leak into the module.
removed before the heat sink is vented and inserted again afterwards.
CAUTION
your eyes or skin do come into contact with coolant, rinse the affected area thoroughly
with tap water as soon as possible. If coolant has escaped, remove the liquid from the
affected surfaces.
Commissioning the cooling circuit
5.4 Filling the internal deionized water circuit
131