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2502 Series

Figure

14. Heat Insulator Shown Installed on 249 Series

20A7423-C/DOC

in the figure. Then mount the insulator assembly (key

35) on the controller case with four washers (key 53)

and button-head cap screws (key 40). Tighten the

screws.

CAUTION

In the following step, avoid bending the

torque tube rotary shaft of the torque

tube assembly. Bending or side loading

of this shaft could cause erroneous

readings. Additionally, make sure the

ball bearing assembly (key 12, figure 16)

is removed from the case (key 1, figure

16) to provide clearance when installing

the case on the sensor.

2. Remove the bearing assembly (key 12) from the

case (key 1).

3. Carefully slide the controller case straight in, guid-

ing the bearing assembly (key 12), operating arm base

or pointer assembly (key 68 or 51, figure 16) over the

rotary shaft and easing an attached heat insulator over

the shaft coupling (key 36, figure 14) if necessary. Se-

cure the case or insulator to the torque tube arm with

the four cap screws (key 39, figure 14).

Figure

15. Nozzle, Flapper, and Tubing Arrangements

for Various Actions and Mountings

AV2323-A

AV2322-A

B0995-2/IL

Note

If a heat insulator is used, do not insu-

late its exterior.

4. On a unit without a heat insulator, tape the joint

between the case and torque tube arm to minimize the

entrance of atmospheric moisture around the torque

tube rotary shaft.

Fisher 2502 Series Level-Trol User Manual

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