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DEX ELECTRONIC MPS
®
7. Electrical connection
Wiring diagram
EN
2
1
1. Electronic circuitry
2. Heating element
3. Safety pressure cut-out
4. Terminal strip
5. Safety thermal cut-out
Only by a specialist!
Please observe:
• VDE 0100
• The installation must comply with current IEC and national local regulations or
any particular regulations, specified by the local electricity supply company
• The rating plate and technical specifications
5
• The unit must be earthed!
Structural prerequisites
3
• The appliance must be installed via a permanent connection. Heater must be
4
earthed!
• The electric wiring should not be injured. After mounting, the wiring must not be
direct accessible.
• An all-pole disconnecting device (e.g. via fuses) with a contact opening width of at
least 3 mm per pole should be provided at the installation end.
• To protect the appliance, a fuse element must be fitted with a tripping current com-
mensurate with the nominal current of the appliance.
Load shedding relay
If further three-phase appliances are connected, a load shedding relay designed for
electronic instantaneous water heaters (CLAGE no. 82250) can be connected to phase
conductor L
.
2
LCD Description
0
Operation without load shedding relay, manufacturer's setting
1
Operation with normal load shedding relay
2
Operation with sensitive load shedding relay
A special operating mode must be selec ted on the appli ance for this purpose.
To change the operating mode, press the four keys ( ,
and wait until the desired mode (0, 1 or 2) is shown on the display, then release the
keys. Operating mode 1 must be selected first, thus to check the correct operation of
the load shedding relay at low appliance output (35 °C setpoint and low water flow
rate). Mode 2 must be selected if the load shedding relay flickers.
28
,
and
) simul taneously
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