Diaphragm Metering Pump MEMDOS E / DX
BW 1 04 02 / 4
Lutz-Jesco GmbH
Improved changes are always reserved without notice.
5. Safety instructions
- When working on metering equipment, observe
the local safety rules (e.g. wear personal protective
clothes).
- Before working on the metering pump and plant,
disconnect it from the main power supply and secure
it against reconnection. Before the voltage supply is
switched on again, the metering lines must be
connected so that chemical left in the metering head
cannot spurt out.
- The metering head of the pump as well as
connections and lines in the plant may be under
pressure. Working on the metering plant requires
special safety precautions and may only be carried
out by instructed technical personnel.
- Before startup, all screwed connections must be
checked for correct tightness and, if necessary,
must be tightened up using appropriate tools.
- If connections at the metering head are unscrewed
during operation for venting or other reasons, leaking
chemical must be removed completely. This is the
only way to avoid the danger of physical injury and
corrosion at the metering pump. Leaking chemical
may also destroy the diaphragm at its mounting
points.
- When changing the chemical, check whether the
materials used for the metering pump and the other
plant parts are chemically resistant.
If there is the danger of a chemical reaction between
different media, a thorough cleaning first is mandatory.
- To operate the pump mount the fan shell in order
to ensure sufficient cooling of the motor.
- Protective class of the control unit is only reached
if ports are protected by caps or serial plug-in
connectors are used.
Note:
Under certain operating conditions, the drive motor of
the DX version might warm up considerably. To avoid
unintentional contact, provide an appropriate device.
6.
1.
2.
3.
4.
5.
6.
7.
Startup
Before starting the metering pumps all works
mentioned in the "Installation" section must be
carried out. At the same time the safety
instructions must be observed.
The MEMDOS E metering pump is switched on
by a control to be installed externally. The
MEMDOS DX has its own control. The electrical
connection and the different possibilities of control
are described in chapter 7, MEMDOS DX control
unit.
The manual or electrical capacity adjustment
must be set to maximum stroke to improve
priming. During first priming no backpressure
should be applied. For this purpose we
recommend to install a relief valve on the
discharge side of the metering pump.
A previously installed priming aid must be filled
with chemical first. If the pump is not priming,
turn out the discharge valve and fill water or
chemical (if not dangerous!) into the metering
head. Remount valve and start priming.
If a venting facility is available as separate unit,
open it and wait until liquid escapes. Then close
it again. In the case of effervescent liquids allow
the liquid to escape permanently (approx. 1 drop
for 1...3 strokes).
When correct operation is achieved, set to
required output by means of the adjusting knob.
For first approximation refer to the performance
curves shown in MB 1 04 02. Depending on the
installation and the chemicals used, these values
may differ and must be checked under operating
conditions.
The manufacturer of the metering equipment is
not responsible for damages due to excessive or
low flow rates resulting from faulty pump settings
or incorrect and insufficient installation of
peripheral fittings.
