Drain Connection; System Connection; Electrical Installation - Wilo Sinum MP M-2-50 Notice De Montage Et De Mise En Service

Please observe the following specifications before
filling and commissioning the pressure-expansion
automat:
• Install the feed to the top-up hose with shut-off
valve (as delivered).
• Avoid any tensile loads on the hose, bending radii
of less than 50 mm and contractions.
• If the top-up feed is connected to the water
main, a backflow preventer with filter must be
connected in series in compliance with EN 806-4/
EN 1717. Install this accessory horizontally and fit
a shut-off valve before this assembly (note: clean
filter regularly and change filters as and when
required).
Caution: Connect the shut-off valve to the top-
up intake.

6.4. Drain connection

To safely route the volume flows to be discharged
at the safety valve (Pos. 3.16), backflow pre-
venter (accessory, top-up) and the atmospheric
pressure compensation connection (Pos.1.3) a
drain is required in the vicinity of the Wilo-Sinum
equipment.
• Install a drain funnel and, if necessary, a drain pipe
for the backflow preventer.

6.5. System connection

The system connection should be connected to
the heating or cooling system.
Lockshield valve
Fig. FM.036.V01.15
Appendix 1 shows the installation diagram and
example installation.
Please observe the following specifications before
filling and commissioning the pressure-expansion
automat:
• T he connection should preferably be made in the
return line of the heating system. Please note that
a temperature at the system connection > 70 °C
(...80 °C) would exceed the permissible pump/
diaphragm load and possibly lead to damage to
components. (Complete insulation of the expan-
sion pipe may increase the temperature load on
the control unit and the diaphragm).
• Make sure that this connection is directly con-
nected to the heat generator, and that there are
no external hydraulic pressure influences present
at the point of entrainment (e.g. hydraulic bal-
ancers, distributors).
• T he flow determines how you should install the
expansion lines. When fitting expansion lines to
the return > 5 m in length, use pipes of at least
one nominal diameter larger than that of the
pump module. Avoid additional loads to the sys-
tem connection of the control unit (e.g. from heat
expansion, flow oscillations, dead weights).
Installation and operating instructions Wilo-Sinum
• E quipment with flow temperatures > 100 °C must
have a minimum pressure limiter fitted in the
expansion line (system drain, valve drain pipe-
work). The arrangement is contained in Appen-
dix 1. In applications in accordance with DIN
EN12828:2003 (D), this limiter is only envisaged
for use if the pressure holding device does not
have an automatic top-up system.
• Use sealants and pipework relevant to the in-
stallation; however, please observe at least the
maximum permitted volumetric flow, pressure
and temperature values for the expansion line in
question (control unit/system inlet and outlet).
• F it a non-return valve in the immediate vicinity
of the system connection on the control unit that
cannot be unintentionally shut off.
Caution: Close the lockshield valve at the system
inlet and outlet of the control unit.

6.6. Electrical Installation

The provision of power supply, (protective)
ground wire connection and line protection must
be made in accordance with the
regulations of the responsible power compa-
ny and the applicable standards. The required
information can be found on the type plate of the
control unit, the terminal plan (labelling) and in
Appendix 3.
The mains connection to be provided via a CEE
plug/socket combination with load-switching
ability. It should be a snap-on type, to avoid
unintended disconnections. For units with a total
rated power above 3 kW (see Appendix 3) we
recommend interlocking this combination with
a combined switch so that plugging or discon-
necting is only possible if the switch is in the OFF
position. The separator should be marked accord-
ingly, easy to handle and placed appropriately in
the vicinity of the unit.
Hint: install equipotential bonding between earth
connection and equipotential bonding conductor.
The minimum diameter, quality and type of the
power cables should apply to the on-site applica-
ble rules and regulations for this application. The
electrical control terminals must be connected at
the set-up location to the mains power supply at
the relevant operating voltage.
The finished system allows the user to program
the configuration and system-dependent param-
eters into the control unit.
English
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