Models 947, 948 and 960 Leak Detectors Operations and Service Manual
B-28
B.5.2.2.2 Re-installing the Dry System Forepump
WARNING
To avoid injury, use proper lifting techniques when moving
pumps. Your system may have pumps that require two people
to move them safely.
To perform this procedure:
1. Ensure the area is clean for the new pump.
2. Place the new pump in the 947/948/960 oriented as shown in Figure B-10 on
page B-15, and the mounting bolts into the holes in the floor of the cabinet.
3. Place the centering ring and O-ring against the pump outlet on the left side of the pump.
4. Place the manifold against the centering ring.
If necessary, shift the pump so that the connection is clean and there is no strain on the
manifold.
5. Place the NW25 clamp onto the connection and tighten fully.
B.5.2.2.3 Connecting the Nitrogen Purge Pump
To perform this procedure:
1. Replace the VPI valve.
2. Attach the NW25 clamp to the top of the pump.
3. Connect the NW25 clamp at the opposite end of the valve.
B.5.2.2.4 Replacing the Isolation Valve
CAUTION
An electrician or electrical technician is required for proper
removal and installation.
To perform this procedure:
1.
Dry System Forepump only:
Replace the forepump.
2. Reconnect AC power.
3. Reconnect the VPI valve at pump and the valve block connector.
Summary of Contents for 948
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