Pelco EH8104 User Manual

®

EH25/8104ORKIT

O-Ring Replacement Kit for

EH2500 Series Dust-Tight and

EH8104 Series

Pressurized Camera Enclosures

Installation/Operation Manual

C1953M (11/98)

1.0 INSTALLATION

The EH25/8104ORKIT contains two O-rings (one will be used for the rear plate
seal only, the second is a spare), a tube of O-ring lubricant, and two bags of desic­cant.

This O-ring kit installation instruction applies to the EH2500 and EH8104 Series
enclosures.

Pelco does not supply basic tools needed for the installation process. The following
tools are recommended:

5/64-inch Allen wrench (for EH2500 Series only)
Flat screwdriver
EH8000RKIT recharge kit (for EH8104 Series only)
Assorted wrenches (for EH8104 Series only)

O-RING REPLACEMENT (EH2500 Series Enclosures)

1. Turn off power to the enclosure.

2. Remove the two screws that attach the rear plate to the enclosure.

3. Disconnect the video and electrical cables inside the enclosure.

4. Remove the desiccant bags inside the enclosure and replace them with the
two bags from the kit.

5. Remove the O-ring from the groove in the enclosure rear plate and discard.
Be careful not to damage or score the O-ring groove. Clean the O-ring groove
thoroughly.

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6. Lubricate the new O-ring with the lubricant in the kit and install it in the groove
in the enclosure rear plate.

7. Reconnect the video and electrical cables.

8. Reinstall the rear plate on the rear of the enclosure body. Apply additional
lubricant to the new O-ring, if necessary, and ensure it remains in the correct
position. Reinstall and tighten the screws.

O-RING REPLACEMENT (EH8104 Series Enclosures)

1. Turn off power to the enclosure.

2. Remove the mating connector from the rear of the enclosure by turning the
outer ring counterclockwise until a click is felt; then pull the mating portion of
the connector off. You may elect to remove the enclosure from its mount which
will make the disassembly process much easier.

3. Remove the Schraeder valve cap.

WARNING:

Pressure
must be released be­fore opening the enclo­sure or personal injury
may result.

NOTE:

The EH8000RKIT re­charge kit uses a regulator that has
a fixed, nonadjustable output pres­sure of 5 psi. The gauge reads the
tank pressure only. This can be
used to determine how much pres­sure is left in the tank after each
recharge and when it is necessary
to replace the tank.

CAUTION:

If re­charging equipment
other than the
EH8000RKIT recharge
kit is used, do not ex­ceed 5 psi. Exceeding

5 psi pressure will
damage the enclo­sure.

4. Relieve internal enclosure pressure by depressing and holding down the cen­ter stem of the Schraeder valve.

5. Once the internal pressure has been relieved, use a screwdriver to pry the
end of the spiral retaining ring from the retaining ring groove in the rear of the
enclosure body and remove the ring.

6. Pull the T-handle to remove the rear plate from the housing.

7. Remove the desiccant bags inside the enclosure and replace them with the
two bags from the kit.

8. Remove the O-ring from the groove in the enclosure rear plate and discard.
Be careful not to damage or score the O-ring groove. Clean the O-ring groove
thoroughly.

9. Lubricate the new O-ring with the lubricant in the kit and install it in the groove
in the enclosure rear plate.

10. Place the rear plate into the rear of the enclosure body. Apply additional lubri­cant to the new O-ring, if necessary, and ensure it remains in the correct posi­tion.

11. Reinstall the spiral retaining ring in the retaining ring groove in the rear of the
enclosure.

12. Pressurize the inside of the enclosure using the EH8000RKIT recharge kit.
Connect the regulator to the tank by threading the nut into the socket of the
tank valve and tighten with a wrench. The regulator is preset for 5 psi. Ex-

ceeding 5 psi pressure will damage the enclosure.

13. Once the regulator has been attached to the tank, open the regulator valve
fully, then open the tank valve.

14. Using the self-holding air chuck, apply pressure to the enclosure by affixing
the air chuck to the Schraeder valve on the rear of the enclosure.

TIP:

Having the window of the
enclosure pointing upward will
greatly reduce the purge time nec­essary to remove oxygen from the
enclosure.

15. Remove the plastic cap from the pressure relief valve on the rear of the enclo­sure. (Use a small flat screwdriver to hold it open.) At this point, allow the
nitrogen to flow through the enclosure until the humidity indicator registers the
lowest humidity level (changing color from pink to blue). The humidity indica­tor can be viewed through the front window of the enclosure looking at the
inside top of the enclosure. Once the humidity indicator registers the lowest
level, remove the screwdriver and allow nitrogen to continue to flow into the
enclosure until you no longer hear the flow of nitrogen from the tank to the
enclosure.

2 Pelco Manual C1953M (11/98)