ABB TZIDC 서비스 지침 - 페이지 2

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TZIDC / EDP300 | SEI/POSITIONER/SUPPLY_AIR_FILTER-XA REV. A

Replacing the supply air filters for the digital positioners TZIDC / EDP300

Warnings

The warnings in these instructions are structured as follows:

CAUTION

The signal word 'CAUTION' indicates an imminent danger.

Failure to observe this information may result in minor or

moderate injury.

Note

'Note' indicates useful or important information about the

product.

Replacing the filter element

The digital positioner is equipped with a supply air filter that can

collect small amounts of contaminants.

The supply air filter prevents the digital positioner's sensitive

pneumatic components becoming clogged or damaged.

Note

The supply air filter is not a substitute for the required supply air

treatment in accordance with DIN/ISO 8573-1. If the supply air is

contaminated, the supply air filter can become clogged and

must be replaced.

1 Filter insert

Figure 1: Supply air filter in the TZIDC

2 Screw plug

1 Filter insert

2 Screw plug

Figure 2: Supply air filter in the EDP300

Replacing the filter insert

CAUTION

Risk of injury from pressurized components

The screw plug and the filter insert can be ejected if the screw

plug is loosened when the pressurized air is switched on.

•

Only ever loosen the screw plug when the positioner is

depressurized and vented.

1. Disconnect the supply air to the positioner and vent the

positioner.

2. Loosen the screw plug using a screwdriver.

3. Remove the contaminated filter insert using tweezers.

4. Replace the new filter insert as depicted in Figure 3 or

Figure 4.

•

Ensure that the filter insert is aligned correctly. Ensure

that the O-ring sits in the housing of the TZIDC correctly

and is undamaged.

5. Hand-tighten the screw plug using a screwdriver.

6. For the EDP300, also check the filter element (sieve) in the

supply air inflow for contamination and damage.

7. Power-up the supply air to the positioner and check all screw

connections you loosened for tightness.

3 Filter element (sieve) in the supply

air inflow (EDP300 only)