Page 514 - Med Plaza and Cancer Center

6/REPAIR PROCEDURE

6.7 Flexible Hose Replacement 5. Reverse the procedure to install the replacement
gauge.
The flexible hose has a soldered connection in the 6. Perform Leak Test Procedure (See Section 4.4).
manifold. Therefore, to replace a hose, the manifold
assembly must be replaced. See Section 6.8. 7. Verify accuracy of the gauge by performing Procedure
#2 in Section 4.2 (Setting Alarm Trigger Points).

6.8 Manifold Assembly Replacement 6.11 Switch Gauge Replacement

Figure 23 Figure 23
1. Remove the front panel (See Section 6.1). 1. Remove the front panel (See Section 6.1).
2. Disconnect the flexible hose from the coupling in the 2. Remove the specific manifold (See Section 6.8).
rough in box.
3. Disconnect switch gauge wires from the Control/
3. Disconnect the appropriate switch gauge two wire Display Board (depress spring clamp connector
leads from the control/display board. buttons).
4. Remove the 2 screws that hold the manifold bracket 4. Turn the gauge to remove it from the manifold.
to the front panel; lift off the manifold assembly.
5. Inspect manifold opening for any dirt, sealant tape,
5. To reinstall the replacement manifold, reverse this etc.
procedure.
6. Before installing the replacement gauge, apply
6. Perform Leak Test Procedure (Section 4.4) on any Teflon® tape to the gauge fitting (See Section 6.6).
fittings that were disconnected.
7. Reverse the procedure to in stall a switch gauge
8. Perform Leak Test Procedure (Section 4.4).
6.9 Ground Strap Replacement
Figure 23 6.12 Control/Display Board Replacement
1. Remove the front panel (See Section 6.1). CAUTION: Electrostatic discharge through the printed
circuit boards will damage the components. Handle all circuit
2. Remove each manifold assembly that holds the
boards by their nonconductive edges and use anti-static
ground strap in place (See Section 6.8).
containers for transporting them. Before servicing the
CAUTION: Before removing the manifolds, note their equipment, ground yourself and the service tool to
location so that they can be reinstalled in the same location discharge any accumulated static control by properly
during reassembly. wearing a static control wrist strap.
3. Remove the ground strap from the front panel. 1. Remove the front panel (See Section 6.1).
4. Reverse the procedure to reinstall the grounding 2. Pull ground wires off C/D board tabs.
strap. 3. Disconnect switch gauge wires (depress spring clamp
connector buttons) and power supply board connector
6.10 Line Pressure Gauge Replacement from PC/CD board

Figure 23 Note: Before disconnecting the electrical connectors,
note their location so they are properly reconnected.
Tools Required:
9/16" open end wrench 4. Remove the 6 Phillips head screws that secure the
7/16" open end wrench board to the front panel.
Teflon® tape 5. Lift the board up and slide it out.
6. To replace the control/display board, reverse the
1. Remove the front panel (See Section 6.1).
procedure.
2. Remove desired manifold (See Section 6.8).
3. Place a 9/16" wrench on the gauge coupling and a CAUTION: Align the LED’s with their respective front
7/16" wrench on the line pressure gauge fitting. Hold panel openings and verify respective switch operations be
the 9/16" wrench firm and turn the 7/16" wrench fore tightening the screws on the circuit board.
counterclockwise to remove the line pressure gauge.
Inspect the pen coupling for any dirt, sealant tape,
etc.
4. Before installing the replace ment gauge, Teflon® tape
must be applied to the threads of the gauge. Refer to
Section 6.6 for Teflon® tape application procedure.

0178-0135-000 Rev. A 6-4