150-712-200-02
Installation
HRE-712 List 1 and List 2
July 26, 2000
17
C
LOSING
THE
E
NCLOSURE
To close the HRE-712 enclosure, perform these steps:
1
Inspect the enclosure cover and baseplate for dirt, moisture, or mechanical damage, especially around the
baseplate flange and O-ring. Remove any accumulation of dirt or moisture from the cover and replace any
damaged components.
2
Remove the two desiccant bags from the plastic storage bag and place them in the enclosure.
3
Fasten the slot retainer bracket in place.
4
Slide the stainless steel dome over the card cage and position it on the O-ring and baseplate.
5
Lubricate the threads of the cover clamp T-bolt with an anti-seize compound.
6
Position the cover clamp around the base of the cover and the baseplate flange. Handtighten the T-bolt
securely, then torque the T-bolt between 10 and 15 inch-pounds (1.1 and 1.7 Newton-meters).
7
If you are pressurizing an HRE-712 List 2 from a portable pressure bottle, block air from the cable stub in the
splice case by placing an air-dam in the stub according to local practice to prevent pressure leakage back into
the main cable. Verify that the air-cutoff valve is off or turned fully clockwise. Turn on the pressure from the
external source.
8
If you are pressurizing an HRE-712 List 2 from the main cable, open the air-inlet tube by turning the air valve
one complete turn counterclockwise. Allow the enclosure to pressurize from the main cable through the cutoff
stub.
9
If you are pressurizing an HRE-712 List 1 which has been converted to a pressurized version where the
breather vent has been replaced with a pressure-relief valve, verify that the air cutoff valve is fully open or
turned counterclockwise. Turn on the pressure from the external source.
10
If you are pressurizing the enclosure as described above and the unit will not monitor pressurization, check
the O-ring and enclosure for leaks by painting the enclosure with a pressure-testing solution such as soap and
water. If you detect a leak, tighten the T-bolt and tap lightly around the cover clamp. Repeat as necessary until
the cover is sealed.
11
Secure the HRE-712 with a padlock. This step is not required for manhole-mounted enclosures. However, a
locking assembly is provided, if needed.
The desiccant bags shipped with the units must be activated prior to closing the lid. Do this by
removing the bags from their plastic container and placing them inside the enclosure.
