Ecolab 417102214, Руководство пользователя

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417102214_EDPL_V60.docx 118 Rev. 1.12.11
14.4 Materials
Metering head: PP, optionally PVDF, stainless steel 1.4571
Diaphragm: PTFE/EPDM compound diaphragm
Seals: FPM (Viton B), optionally EPDM, Kalrez
Valve balls: Ceramic, glass, optionally stainless steel 1.4401, PTFE
Valve springs: Hastelloy C4
Housing: PPO / AL
Colour: Blue RAL 5007
Special designs on request
14.5 Pin assignments
14.5.1 Pin assignment: Empty signal (3-pin)
Connection of level pre-warning or empty signal
Fig. 14.2
PIN
Wire colour
(Connection
cable)
Description
1
Brown Level pre-warning
3
Blue Level empty signal
4 Black GND
see also chapter: 7.2.5.1
„ Pin configuration for slot I (3-pin) - Input for
level pre-warning and empty signal “
ATTENTION
If the empty signal is not used, contact 3/4 must always be bridged!
The protective cap provided for this creates the bridge between the contacts and has to
be attached in this case.
NOTE
The empty and reserve signal inputs can be inverted in the "Configuration / Level
contact" menu. (see chapter
10.4.9 „ Configuration / Level contact “ )
14.6 Metering rates
The reproducible metering accuracy is approximately ± 3 % under invariable conditions.
Due to the characteristics of the pump, higher outputs can occur until operating temperature
is reached.
Accurate metering can be achieved by complying with the following points:
a) All metering capacity data refer to water at 20 °C, as well as to constant supply voltage
and with the metering pump operating at normal running temperature.
b) If there is pre-pressure on the suction side, the pressure difference between the suction
and pressure side must be at least 0.1 MPa (1 bar). The water column on the metering
pump must be protected by an appropriate valve arrangement.
NOTE
A pressure maintaining valve or a metering valve is not a shut-off device with a total seal.
14.7 Metering rates depending on back-pressure and stroke setting
Setting ac 15 % - 5 % of the rated value, all data are relative to water at 20 °C and in
accordance with the instructions in the user's manual.