Flowserve 3200MD User Manual download pdf (Page 23)

User Instructions - Digital Positioner 3200MD LGENIM0059-09 12/13

Figure 15: Main PCB Assembly

8.2 Regulator

The regulator reduces the pressure of the incoming supply air to a

level that the driver module can use.

Replacing Regulator

To replace the regulator, refer to Figures 11 and 15 and proceed as

outlined below. The following tools are required:

• Phillips screwdriver

• ¼ " nutdriver



WARNING: Observe precautions for handling electrostati-

cally sensitive devices.

1. Make sure valve is bypassed or in a safe condition.

2. Disconnect the power and air supply to the unit.

3. Remove the main cover.

4. Remove the plastic board cover by removing the three retaining

screws (See Figure 15).

5. Remove the ﬁ ve wire connections from the main PCB assembly

(six wire connections if the unit is equipped with the 4-20 mA

analog output option).

6. Remove the retaining screw from the main PCB assembly and

lift the main PCB out of the housing.

7. Remove the four screws from the regulator base. Verify that as

regulator is removed, the O-ring and ﬁ lter remain in the counter-

bore (please See Figure 11).

8. Remove tubing and barbed ﬁ tting from the regulator base.

9. Install barbed ﬁ tting and tubing to the new regulator.

10. Verify O-ring and ﬁ lter are in the counterbore. Install new regula-

tor using 8-32 x ½ " screws.

! NOTE: Do not mix the regulator with those from older Logix

positioners. Older models contain regulators with different set-

tings that will not work in the Logix 3200MD model. The regula-

tor pressure setting is printed on the top of the regulator. The

Logix 3200MD regulator is set to 17.4 psig.

11. Install the main PCB into the housing. Insert the retaining screw

through the board into the threaded boss and tighten evenly,

using a Phillips screwdriver. Do not overtighten.

12. Reinstall the ﬁ ve wire connections (six wire connections if the

unit is equipped with the 4-20 mA analog output option).

13. Install the plastic board cover. Insert the three retaining screws

through the plastic cover into the threaded boss and tighten

evenly, using a Phillips screwdriver. Do not overtighten (See

Figure 15).

14. Reinstall all covers.

8.3 Checking or Setting Internal

Regulator Pressure

To check or set the internal regulator pressure, refer to Figure 16

and proceed as outlined below. The tools and equipment used in the

next procedure are from indicated vendors. The following tools are

required:

• Calibrated pressure gauge (0 to 30 psi)

•

⁄16" ﬂ exible tubing

• Barbed Tee (Clippard Minimatic part number T22-2 or equivalent)

•

⁄32" Allen wrench

•

⁄8" open-end wrench



WARNING: Observe precautions for handling electrostati-

cally sensitive devices.

Figure 16: Driver Module Regulator Pressure Check

Regulator Pressure

Test Port

Barbed Tee

(Clippard Minimatic

Part No. T22-2)

Flexible Tube

from Regulator

Driver Module

Barbed Fitting

10-32 x "

⁄16

1. Make sure the valve is bypassed or in a safe condition.

2. Remove the main cover.

3. Remove the plastic board cover by removing the three retaining

screws.

4. Remove the

⁄16" ﬂ exible tubing from the barbed ﬁ tting on the

side of the driver module.

5. Obtain a barbed tee and two pieces of

⁄16" ﬂ exible tubing, a few

inches in length each.

6. Position the barbed tee between the internal regulator and the

driver module by connecting the

⁄16" ﬂ exible tubing, found in

the positioner, to one side of the barbed tee. Using one of the

new ﬂ exible tubing pieces, connect the barbed tee to the barbed

ﬁ tting on the side of the driver module. Connect the remaining

port on the barbed tee to a 0 to 30 psi pressure gauge.

7. Reconnect the air supply to the positioner and read the internal

regulator pressure on the 0 to 30 psig gauge. The internal

pressure should be set to 17.4 ±0.2 psig. If adjustment is needed,

loosen the set screw retaining nut on the top of the regulator us-

ing the

⁄8" open-end wrench. Then adjust the regulator pressure

by turning the set screw on the top of the regulator with the

⁄32"

Allen wrench.

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