11 Maintenance
CAUTION
Prior to repair and maintenance work and metering of dangerous media, always rinse the
metering head, relieve the pressure pipe and wear protective clothing (protective goggles,
Electronics repairs must only be performed by trained electricians, following the safety regulations
of the professional association VB G 4 and ZH 1/11)!
CAUTION
When opening the covers or removing parts, except when this is possible without tools,
voltage-carrying parts may be exposed. Connection points may also be under live
Before calibration, maintenance, repairs or replacement of parts, the device must be disconnected
from all voltage sources if it is necessary to open up the device.
NOTE
The maintenance interval is half-yearly. Shorter intervals are recommended in the event of
heavy loads (e.g. continuous use).
The following inspections are recommended:
suction pipes and pressure pipes for leak-free connections
suction valve and pressure valve (chapter
11.1 “Replacing the suction / pressure valve
and metering cartridges”) for dirt and tightness.
discharge connection (chapter 5.1
“EMPII E60”) on the pump head (for diaphragm
breakage).
correct metering
metering head screws (chapter 11.2
“Replacing the diaphragm and pump head”)
(stable seat, 3 - 4 Nm)
NOTE
The life of the diaphragm depends on the:backpressure, operating temperature and
metering medium.It is recommended to inspect the diaphragm more frequently in extreme
operating conditions or if abrasive substances are metered.
11.1 Replacing the suction / pressure valve and metering cartridges
Disassemble the suction valve and pressure valve with a crescent wrench (SW 22).
Assemble all the O-rings.
Assemble the metering cartridges (on valve version V3).
Screw in the suction valve and pressure valve in the correct position (torque of 2-3 Nm)
11.1.1 3 Ball-Valve (V3), 1,4 – 2,5 l/h for type: V3014 - V3025
A
B
C
Fig. 11.1 Maintenance: 3 Ball Valve (V3), 1,4 – 2,5l/h for type: V3014 – V33025
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