Emerson Fisher 4320 Manual de instrucciones Pagina 66

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Instruction Manual
D103621X012
4320 Position Monitor
April 2014
66
Figure 39. Pneumatic Interface
PNEUMATIC INTERFACE
WIRE LEADS
PILOT VALVE
CONNECTORS
(RED)
PILOT
VALVE
CONNECTORS
PILOT VALVES (2)
PNEUMATIC INTERFACE
(KEY 15)
HOUSING GASKET
(KEY 14)
X0553
X0548
3. Remove the three hex socket cap screws (key 27) from the pneumatic interface (key 15).
4. Remove the pneumatic interface by pulling it straight out of the housing.
5. Carefully remove the housing gasket (key 14). It may be attached to the back of the pneumatic interface.
6. Remove the four Orings (key 26).
7. Follow the procedure below to install a new pneumatic interface and gasket.
Pneumatic Interface and Gasket Installation
1. Install the four new orings (key 26) into the housing.
2. Install the new housing gasket (key 14), making sure it is completely seated into the housing.
3. Align the wire leads from the pilot valve into the appropriate openings in the housing and carefully slide the
pneumatic interface into the housing until the two connectors can be plugged in.
4. Insert the pneumatic interface into the housing.
5. Install the three hex socket cap screws (key 27) and tighten to 1.13 N•m (10 lbf•in).
6. Close the 4320 cover and tighten the instrument cover screws to a torque of 5.6 to 6.7 N•m (50 to 60 lbf•in).
7. Follow the instructions on page 65 to install the spool valve and pneumatic gasket.
Filter Replacement
1. Remove the two screws holding the filter assembly (key 13) in place.
2. Remove the filter assembly from the housing (it is okay to twist the filter to aid in removal).
3. Insert the new filter into the housing, making sure that the holes line up with the screw holes in the housing.
4. Replace the two screws holding the filter assembly in place and tighten to 1.13 N•m (10 lbf•in).
5. Repeat the above steps for the second filter.
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