Leak Sensor Strip Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	Not Applicable	40 minutes per tray	Not Applicable

Table 2. Tools and test equipment
Item	Quantity	Effectivity	Part number	Manufacturer
Standard Tool Kit	1	-	-	-

Table 3. Replacement parts
Item	Quantity	Effectivity	Part number	Manufacturer
Leak Sensor Strip Kit	1	-	5266125	-

Overview

This document covers replacing leak sensor strips on the following components:

Perform LOTO on the PDU. See the MR Service Safety Manual, PN 5452735.
Remove cables J12 and J13 from the PDU. This allows access to the right PDU leak sensor tray.

Figure 1. Remove PDU Cables
Unplug the two leak sensor strip connectors on both sides of the tray, using the white quick disconnect.

Figure 2. Unplug Leak Sensor Strip Connectors
Loosen the two thumb screws on the top of the tray.
Pull the tray out from the cabinet.
Remove all 12 retainers holding the leak sensor strip to the tray.

Figure 3. Remove 12 Retainers

Note:
The sensor is folded at the corners. This configuration will be repeated during installation of the new sensor strip.
Remove the sensor strip.

Start routing the new leak sensor strip approximately 1 inch from the right edge of the tray. Seat the strip so that the first and second open wire holes fall on either side of the retainer.

Note:
When routing this leak sensor strip, it does not matter which end is used. The ends are interchangeable.

Figure 4. Properly Seated Leak Sensor Strip

Before tightening, be sure all retainers lay properly on top of the sensor strip with the retainer channels and sensor interlocking.

Figure 5. Properly Seated Retainer
Tighten the nuts for each retainer.
Continue routing the sensor strip and retainers, making sure that bends do not cause the open wire holes to cross each other.

Figure 6. Bending Leak Sensor Strip

Figure 7. Fully Routed Leak Sensor Strip
Slide the tray into the right side of the cabinet.
Tighten the two thumb screws to secure the tray to the cabinet.
Reconnect the leak sensor strip connectors on both sides of the tray.
Reconnect cables J12 and J13 to the PDU.

This procedure takes 45 minutes from beginning to finalization.

Follow Step 1 through Step 5 to remove the right PDU leak sensor tray. This allows access to the left PDU leak sensor tray.
Unplug the remaining leak sensor strip connector on the left PDU leak sensor tray.
Remove the two thumb screws on the top of the tray.
Slide the left PDU leak sensor tray to the right in the cabinet and pull it out.

Figure 8. Slide Over Left PDU Leak Sensor Tray
Remove all 12 retainers holding the leak sensor strip to the tray.

Figure 9. Remove 12 Retainers

Note:
The sensor is folded at the corners. This configuration will be repeated during installation of the new sensor strip.
Remove the sensor strip.

Start routing the new leak sensor strip approximately 1 inch from the right edge of the tray. Seat the strip so that the first and second open wire holes fall on either side of the retainer. See Figure 4.

Note:
When routing this leak sensor strip, it does not matter which end is used. The ends are interchangeable.

Before tightening, be sure all retainers lay properly on top of the sensor strip with the retainer channels and sensor interlocking Figure 5.
Tighten the nuts for each retainer.
Continue routing the leak sensor strip and retainers, making sure that bends do not cause the open wire holes to cross each other. See Figure 6.

Figure 10. Fully Routed Leak Sensor Strip
Push the left leak sensor tray into the right side of the cabinet and slide it to the left side. See Figure 8.
Tighten the two thumb screws to secure the tray to the cabinet.
Slide the right leak sensor tray into the right side of the cabinet.
Tighten the two thumb screws to secure the tray to the cabinet.
Reconnect the leak sensor strip connectors for both trays (4 connections total).
Reconnect cables J12 and J13 to the PDU.

This procedure takes about 25 minutes from beginning to finalization.

Perform LOTO on the PDU. See the MR Service Safety Manual, PN 5452735.
Unplug the leak sensor strip connectors on the left side of the tray.
Remove the two screws holding the XGD leak sensor tray to the base of the cabinet.

Figure 11. Remove XGD Leak Sensor Tray Screws
Remove the tray from the cabinet.
Remove the four retainers holding the leak sensor strip to the tray.

Start routing the new leak sensor strip approximately 3 inches from the right edge of the tray, with the grey connector to the right side. Seat the strip so that the first and second open wire holes fall on either side of the retainer.

Figure 12. Routing Leak Sensor Strip

Be sure the retainer lays properly on top of the sensor strip before tightening. See Figure 5.
Tighten the nuts for each retainer.
Position the XGD leak sensor tray at the base of the cabinet.
Tighten the two screws to secure the tray to the cabinet.

Perform LOTO on the PDU. See the MR Service Safety Manual, PN 5452735.
Remove the RF door and set aside.
Remove the two screws holding the RF leak sensor tray to the base of the cabinet.

Figure 13. Remove RF Leak Sensor Tray
Remove the lower door frame shown in Figure 13.
Unplug both leak sensor strip connectors on the far left side of the tray. See Figure 2
Remove the two 17 mm bolts shown in Figure 13.
Remove the tray from the cabinet.
Remove all 14 retainers holding the leak sensor strip to the cabinet.

Figure 14. Remove 14 Leak Sensor Strips

Note:
The sensor is folded at the corners. This configuration will be repeated during installation of the new sensor strip.
Remove the sensor strip.

Start routing the new leak sensor strip clockwise approximately 1 inch from the left edge of the tray. Seat the strip so that the second and third open wire holes fall on either side of the retainer.

Note:
When routing this leak sensor strip, it does not matter which end is used. The ends are interchangeable.

Figure 15. Routing the Leak Sensor Strip

Be sure the retainer lays properly on top of the sensor strip before tightening. See Figure 5.
Tighten the nuts for each retainer.
Continue routing the leak sensor strip and retainers, making sure that bends do not cause the open wire holes to cross each other. See Figure 6.

Figure 16. Fully Routed Leak Sensor Strip
Position the RF leak sensor tray at the base of the cabinet.
Tighten the two screws to secure the tray to the cabinet.
Reinstall the 17 mm bolts Figure 13.
Reinstall the lower door frame Figure 13.
Reconnect the leak sensor strip connectors.

Remove LOTO from the PDU. See the MR Service Safety Manual, PN 5452735.