Installation
95
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014
4. Connect the earthing (see "Connecting the earthing wire", page 99).
5. Secure the communications server to the rack’s fastening rails using the M6
screws and the cage nuts.
6. Fit the screw covers on the left and right of the front panel.
7. Connect the earthing (see "Connecting the earthing wire", page 99).
8. Always observe the location requirements set out in Tab. 39.
4. 2. 6. 2 Fitting an additional fan
An additional fan can be fitted in front of the standard fan already integrated. Both
fans always rotate at the same time and at the same speed, depending on the tem-
perature inside the communications server. The redundant fan unit increases the
system’s operating reliability. If one fan fails, the second fan dissipates the heat. A
fan failure generates an event message, allowing the defective fan (or both fans) to
be replaced.
Note
Fans have a limited service life. So if a fan fails become of age ( approx. 5
years) it is advisable to replace both fans as a precautionary measure.
Materials required:
• Aastra 470 additional fan premounted on fastening frame
• Set of screws for additional fan
• Screwdriver
To install the additional fan proceed as follows:
1. Shut down the communication server via the control panel (see "Call-Manager
display and control panel", page 224) and disconnect it from the power supply.
Warning
Be sure to observe the "Safety regulations", page 92.
2. Remove the upper rear housing cover.
3. Remove the 4 rubber covers from the holes in the back panel of the communica-
tions server provided for mounting the additional fan.
4. Use the 4 enclosed screws to fit the fastening frame complete with additional
fan to the back panel of the communications server (see Fig. 19).
5. Plug the fan connector into the connector marked "FAN 2" on the internal power
supply unit.
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