PairGain 150-458-100-05, Manual

Page: 42 / 52

Appendix B - Technical Reference 150-458-100-05
34 February 23, 2000 HRE-458 List 1, List 1B, and List 2
R
EPLACEMENT
P
ARTS
The HRE-458 contains LPU surge arrestors which may be replaced in the field if needed. ADC recommends that
the O-ring be closely examined whenever the housing is opened for maintenance. Replace the O-ring if damaged.
Replacing the Stainless Steel Dome Cover
To replace the stainless steel dome cover, it is necessary to replace the following items: stainless steel dome cover,
metal locking clamp, and O-ring. It is recommended that the desiccant bags be replaced when the enclosure is
opened. Use Davison Chemical Corp. Proteck-Sorb-121 or equivalent desiccant.
Replacing LPU Arrestor Boards
Perform the following steps for replacing the LPU surge arrestors:
1 Clean the dome cover and clamp of dust and debris.
2 Remove the clamp and dome cover as described in “Opening the HRE-458 Enclosure” on page 17 .
3 Remove the defective LPU board.
4 Insert a new LPU board in the vacant position.
5 Repeat steps 1 through 5 to replace other defective LPU boards.
6 Replace the O-ring if damaged.
7 Place cover and clamp and repressurize housing, if required, per “Closing the HRE-458 Enclosure” on
page 17 .
The cover, clamp, O-ring, and LPU surge arrestors may be replaced in the field if they become
damaged. See
Table 7 on page 34 for replacement part numbers
If an enclosure plug receives severe lightning stress, ADC recommends replacing the LPU
board for that plug.
The LPU board must be reattached so that pin 1 of the LPU board is connected to the edge
connector pin attached to the green ground wire. If pin 1 is attached in any other way,
protection will not be provided.
Table 7. Replacement Part Kits
Number Part
132-1029-01 Cover, Metal Locking Clamp, O-Ring, Desiccant
Qty 1 Therm-O-Nator Dome Cover
Qty 1 Dome Cover O-Ring
Qty 1 V-Band Locking Clamp
Qty 2 Desiccant (2-unit bag)
132-1011-01 O-Ring, Desiccant
Qty 1 Dome Cover O-Ring
Qty 2 Desiccant (2-unit bag)
132-1034-01 LPU Surge Arrestor, Desiccant
Qty 1 Single Slot, 4 Port, Protection LPU Board
Qty 2 Desiccant (2-unit bag)
132-1013-01 List 2 Security Cover