150-506-100-03
Appendix B: Additional Information
HRE-506 List 1 and List 2
March 28, 2000
33
G
ENERAL
D
EPLOYMENT
R
ULES
The HRE-506 is an airtight enclosure. The breather vent valve on gel-filled units and the pressure relief valve on
air-filled units allow minimum ventilation to the atmosphere. This environment traps the heat generated by the
installed plugs and, in effect, causes the heat temperature to significantly rise within the enclosure. The number
of doublers or repeaters that can be housed in the HRE-506 is dependent upon the:
•
Plug type
•
Doubler version (the list number of the doubler version also affects the number of doubler units housed in the
HRE-506)
•
Solar exposure
•
Unit orientation
lists the HRE-506 deployment rules. Even when the deployment rules are followed, the metal surfaces of
the installed units can feel hot to the touch when removed from an HRE-506 that is operating in elevated ambient
temperatures. These conditions are normal for the plugs operating under these circumstances. The plugs were
designed to withstand these elevated temperatures.
When less than six slots are being used, assign the slots in the following sequence to reduce hot spot temperatures:
1, 6, 3, 4, 5, 2.
To comply with the requirements in TA-NWT-001210 (maximum ambient temperature of 115°F with full solar
load), the number of full T1 HDU-439 or HDU-437 doublers must be limited to six without full solar load or five
with full solar load. The fractional doublers (HDU-219 and HDU-217) and the full T1 microdoublers (HDU-409
and HDU-407) comply with the TA when all six slots are occupied with full solar load.
When mixing various repeaters and doublers in the same enclosure, assign the thermal load as shown in
Four T1 repeaters or two DDS ISDN repeaters are thermally equivalent to one HDU-439 doubler.
Also, one HDU-439 or HDU-437 doubler is thermally equivalent to 1.5 HDU-217, 219, 407, or 409
doublers. When fractional values result from applying these equivalent relationships, always
round up to the nearest whole number.
Table 4.
HRE-506 Deployment Rules for Doublers and Repeaters
Recommended
Unoccupied Slot
Numbers
(a)
(a) Following these recommendations for unoccupied slots minimizes thermal stress on the doublers.
Maximum
Number of
Occupied Slots
Solar Load
(b)
(b) Solar Load: FULL = maximum sunlight exposure per TR-TSY-000057. NONE = indoor or fully shaded.
HDU-437, EDU-842,
and HDU 439
Max. Ambient Temp
(c)
(c) All maximum ambient temperatures of 115 °F or more with full solar load comply with the outside deployment
requirements of section 10.2.1.3 of TA-NWT-001210.
HDU-217, HDU-219,
HDU-409, EDU-409,
and HDU-407
Max. Ambient Temp
None
6
Full
95 °F
115 °F
None
6
None
105 °F
125 °F
5 or 2
5
Full
105 °F
125 °F
5 or 2
5
None
115 °F
135 °F
5, 2
4
Full
115 °F
135 °F
5, 2
4
None
125 °F
145 °F
2 and 5, and 6, 3, or 1
3
Full
125 °F
145 °F
2 and 5, and 6, 3, or 1
3
None
135 °F
155 °F
Содержание 150-2204-01
Страница 4: ...Inspecting Shipment 150 506 100 03 iv March 28 2000 HRE 506 List 1 and List 2 ...
Страница 17: ...150 506 100 03 Installation HRE 506 List 1 and List 2 March 28 2000 9 Figure 4 HRE 506 Enclosure ...
Страница 18: ...Installation 150 506 100 03 10 March 28 2000 HRE 506 List 1 and List 2 Figure 5 Pivot mounting Bracket ...
Страница 54: ...Appendix D Abbreviations 150 506 100 03 46 March 28 2000 HRE 506 List 1 and List 2 ...