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Part number 317.553
Part number 317.552.
User Guide
22.3 Replacing the Pump Head
1)
Isolate the monitor.
2)
Remove the gas sample pipes.
3)
Remove the screws from the pump head assembly.
4)
The pump head is replaced as one unit.
22.4 Replacing the pump diaphragm 317.552
1)
Isolate the monitor.
2)
Remove the sample gas pipes.
3)
Remove the pump head.
4)
Use a flat bladed screwdriver to remove the cover.
5)
Retain the gasket.
6)
Push the cam wheel to the position where the diaphragm
begins to work free from the housing.
7)
Secure the wheel with a screwdriver.
8)
Slowly unscrew the diaphragm from the assembly. Ensure
all of the washers are retained.
9)
Fit the washers to the replacement diaphragm.
10) Screw the replacement diaphragm into place.
11) Refit the protective pump cover, the pump head assembly
and the gas sample pipes.
12) Switch on and check that pumps operate, and that air is
being expelled through both bleed ports in the bottom of
the enclosure.
13) Switch on the monitor and check that the pumps operate.
Air is being expelled through both bleed ports in the
bottom of the enclosure.
22.5 Changing a Sensor Unit
1)
Isolate the power supply to the monitor.
2)
Uncouple the sensor electrical input connector (on the
electronics panel).
3)
Remove the tubing for the air and gas feed pipes (on the
sensor unit).
4)
Remove the 4 nylon securing pillars.
5)
Remove the sensor unit from its mounting.
6)
Lift out the old sensor unit.
7)
Mount the new sensor unit.
8)
Refit the 4 nylon pillars.
9)
Refit the air and gas pipes.
10) Reconnect the sensor unit electrical input.
11) Calibrate the monitor.
Millwatch / Silowatch
35
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