MAGDOS
BW 1 02 98 / 2
Verbessernde Änderungen jederzeit ohne Vorankündigung vorbehalten.
JESCO DOSIERTECHNIK GmbH & Co. KG
Do not lay signal cables of water meters or
0(4)...20mA controls parallel to high-voltage current
or power supply lines. Supply and signal lines must
be laid in separate channels. In the case of junctions,
a 90° angle is required. If the water meter control
cable is more than 2 meters long, it must be shielded.
To avoid incorrect metering after the process is
finished, provide an electric and hydraulic interlocking
system.
4. Injection fitting assembly
Injection nozzles prevent the liquid from returning to
the pump by using either a spring-loaded ball valve
or a hose valve. We recommend vertical injection
from bottom to top to allow air to escape thereby
avoiding chemical precipitation. Experience with
the particular metering chemical and all appropriate
characteristics must be taken into account.
5. Safety instructions
⇒
When working on chemical 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.
⇒
After adjustment work at the control panel of the
MAGDOS, the control cover must be closed again
(the cover is not available for all MAGDOS types).
Otherwise protection class IP 65 cannot be
guaranteed.
⇒
After changing the electrical connections, e.g.
removing the level control, the PG cable gland nut
must be tightened in order to ensure the protection
class of the pump.
Injection fitting
