Acrodyne NW8201E DIGITAL TELEVISION BROADCAST TRANSMITTER User Manual 32 NV8202 26 04 06 01 00

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Document ID	864561
Application ID	vnwefxrVtvE1edbLlVsrmQ==
Document Description	Users Manual Part 9
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	211.21kB (2640160 bits)
Date Submitted	2007-11-06 00:00:00
Date Available	2008-01-18 00:00:00
Creation Date	2007-11-02 12:23:23
Producing Software	Acrobat Distiller 5.0.5 (Windows)
Document Lastmod	2007-11-02 12:23:36
Document Title	32 NV8202-26.04.06-01.00.book
Document Creator	FrameMaker 7.0
Document Author:	HUPFAUER

Chapter 2
1.9
Design and Characteristics
Cooling system
Fig. 30 Cooling system
1)
2)
3)
4)
5)
Air intake duct
Fan
Starting capacitor
Differential pressure gage
Temperature sensor
The cooling system with its two integrated fans (active standby) prevents the transmitter
from overheating and contains the following components:
 Air intake/exhaust duct
 Fans (2)
 Starting capacitor (2)
 Differential pressure gages (2)
 Temperature sensors (2)
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Chapter 2
1.9.1
Design and Characteristics
Air Intake/Exhaust Duct
Fig. 31 Air intake duct (1) and exhaust duct (2)
The air from the intake duct is drawn in by the fans and forwarded to the distribution shaft.
The distribution shaft provides enough air to each amplifier to cool it. The heated air is routed to an air collecting shaft on the opposite site of the amplifier and expelled via the exhaust
duct.
Note
The intake/exhaust outputs are located either on the top or bottom of the rack, depending
on your order specifications.
If the intake is at the bottom, there is no intake duct. The connecting flange is located directly beneath the output box.
In addition, the absorber unit is situated at the bottom and it feeds into the exhaust connection.
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Chapter 2
1.9.2
Design and Characteristics
Fans
Fig. 32 Fans
A standard transmitter rack contains two fans, which adequately cool the transmitter with
air. If one of the fans is defective, a warning is sent to the controller but the transmitter continues to operate. If both fans fail, the rack controller switches off the affected rack. The
transmitter indicates a cooling malfunction.
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Chapter 2
1.9.3
Design and Characteristics
Starting Capacitor
Fig. 33 Starting capacitor
Each motor is equipped with an external starting capacitor.
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Chapter 2
1.9.4
Design and Characteristics
Differential Pressure Gage
Fig. 34 Differential pressure gage
The differential pressure gages (diaphragm switches) measure the differential pressure of
each fan between the fan flange (output) and the environment. Thus, fan malfunctions can
be selectively sent to the transmitter control unit.
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Chapter 2
1.9.5
Design and Characteristics
Temperature Sensors
Fig. 35 Temperature sensors
The temperature sensors measure the absolute intake and exhaust temperature in °C for
display on the NETCCU® and for monitoring in the rack controller.
Note
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If the exhaust temperature is higher than 65 °C, the rack controller switches the rack off due
to the danger of overheating.
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Chapter 2
1.10
Design and Characteristics
Transformer
Fig. 36 Transformer
The transformer converts the voltage in the event of local voltage differences, e.g. in the
United States or Canada (AC power supply 115 V/200 V).
Note
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For detailed information about the transformer, refer to the transformer manual.
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Create Date                     : 2007:11:02 12:23:23-04:00
Title                           : 32 NV8202-26.04.06-01.00.book
Author                          : HUPFAUER
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Producer                        : Acrobat Distiller 5.0.5 (Windows)
Page Count                      : 7
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