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150-819-100-03
9
8
Using a
/
-inch, hand-held, hex nut driver, tighten all bolts according to the sequence stamped on the cover
16
to a torque of 25 to 50 inch-pounds. The torque flattens the lock washers. Do not attempt further tightening.
The bolts shear at 125 inch-pounds.
9
Replace the valve core (pin) in the air stem on the base, then connect an air hose having a snap-on chuck to
the air stem. For List 1 units, use a C pressure gauge, pressurize the case to approximately 9 psi. The pressure
relief valve releases if internal pressure exceeds 12 to 25 psi and automatically resets itself when the pressure
drops below the release pressure.
10
With the chuck still in place, test the enclosure for leaks with a pressure-testing solution. If the enclosure is
leaking (indicated by bubbles), the housing lids are not installed correctly.
11
Remove the chuck from the air stem, then replace the valve cap.
12
For List 2 units, open the air bypass valve by turning the air bypass valve clockwise one quarter turn towards
the housing.
Wiring
A single cable stub provides access from the HRE-819 to the main cable. The stub is a 54-pair, 24-gauge,
S-screened cable with four, 12-pair, binder groups and a 6-pair interstatial group. The four, 12-pair groups have
the same color coding. The 12-pairs of each binder group connect to the 12 double-wide slots as shown in
2 on page
16.
The HRE-819 is shown as wired in typical mini-repeater fashion, using Side 1 and Side 2 terminology. This
adheres to conventional terminology which describes a unidirectional (simplex) service with IN and OUT
directional pairs. HDSL is in fact a bidirectional (duplex) service in which each pair carries information in both
directions.
The HRE-819 can house either 12 doublers or 12 T1 repeaters (239 T1) or a combination of 12 doublers and
repeaters. The wiring diagram is screened on the housing lid for easy reference.
assignments, pair assignments, numbering, color codes, and other stub details.
The six interstatial pairs (IS) are used for the PRES slot, the order wire and spare pairs as shown in
page
17.
HRE-819 List 1 and 2
July 9, 1998
Installation
Table
Table 2
shows the slot
Table 3 on
15
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