Nautel XR6, Руководство по предварительной установке

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XR6/XR3 Pre-installation Manual Cooling requirements
Page 4-2 Issue 3.0 2009-07-15
Cooling
Do not allow the transmitter room ambient air temperature to exceed 50°C (122°F) at sea level.
Cooler temperatures are recommended in order to improve the reliability of the transmitter.
• De-rate the ambient temperature 3ºC (5.4°F) per 500 m – or 2ºC (3.6°F) per 1,000
feet – above sea level.
Example:
At 1600 m (1 mile) above sea level, maximum ambient temperature should not
exceed 40.4ºC (104.7°F).
Ensure that hot air from the transmitter is not drawn back into the transmitter’s cool air intake.
Cooling plant requirements
Table 4.1: Cooling plant requirements for the XR6
Table 4.2: Cooling plant requirements for the XR3
Transmitter
output (watts)
Waste heat
(watts)
BTU/hour
(x1000 Btu)
Modulation
Air conditioning
required in a closed
system (tonnes)
6,000 1,843 6.29
100% 0.54
6,000 1,673 5.71
85% 0.47
6,000 1,229 4.19
0% 0.36
Transmitter
output (watts)
Waste heat
(watts)
BTU/hour
(x1000 Btu)
Modulation
Air conditioning
required in a closed
system (tonnes)
3,000 921 3.15
100% 0.27
3,000 837 2.86
85% 0.24
3,000 615 2.10
0% 0.18