ABB BUF 3 User Manual

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1ZSE 5492-128 en, Rev. 4
3.5 Replacement of maintaining contact
3.5.1 Tools required
■ Normal set of screwdrivers
■ Electric drill
■ Drill Ø 3 mm
■ Hammer
■ Drift Ø 2.5 mm
3.5.2 Spare parts required
■ Maintaining contact (No. 6 according to Circuit diagram)
■ Roll pin Ø 3 mm, L = 16 mm
3.5.3 Procedure
1. Loosen the red-white-red indicating ag from the old switch.
2. Mount the indicating ag on the new switch in same position as on the old one.
3. Shift the conductors from the old switch to the new one.
4. Loosen the old switch and mount the new switch.
CAUTION
The lever with the roller inside the mechanism should be horizontal. Check before dismount-
ing the old switch.
3.6 Replacement of pressure relay
3.6.1 General
If the pressure relay fails to pass the insulation test and/or the function test (section 2.2), the
pressure relay has to be replaced.
CAUTION
It is not permissible to replace only the microswitch inside the pressure relay.
3.6.2 Tools required
■ Screwdriver
■ Open-end wrench (30 mm)
3 Repairs and adjustments

ABB BUF 3 Specifications

General

Brand	ABB
Model	BUF 3
Category	Industrial Equipment
Language	English