Specifications

6-5. AIR FILTER CLEANING AND DRAINING.

I” nornml service, supply air filter and signal air

filter/regulator require draining of water and debris at

least way 6 months. The frequency of this mainte-

“ante will depend upon supply air quality. After

installation, drain both filters by slowly opening filter

and filter/regulator petcock valve. Initially drain

monthly, gradually increasing time between draining.

Schedule periodic draining when filters are

approximately l/4 full. Continue draining water and

ITEM DESCRIPTION PART NUMBER

SCEW

120088.033

2 Diaphragm Cover 242687

3 Diaphragm Housing 34273 1

4 Zero Balance Spring 175464.348

5 Diaphragm 9351-002

debris at this interval unless plant supply air

conditions change. If element in air filter is dii,

refer to Section VII for replacement procedure.

DIAPHRAGM CLEANING AND

INSPECTION. Disassemble, clean, and inspect

diaphragm assembly approximately every two years

or if power positioner is not reaching setpoint. Refer

to Figure 6-3 and use the following procedure.

Figure 6-3. Diaphragm Exploded View