Electrical Connection - Wilo Yonos MAXO-D Installation And Operating Instructions Manual

CAUTION! Risk of damage to property!
If the diffusion-proof insulation is fitted at the site, the pump housing may only be insu-
lated up to the motor's separation joint. The condensate drain grooves must remain unob-
structed to ensure that condensate that develops in the motor can drain without problems
(fig. 7). Condensate that accumulates in the motor can cause an electrical defect.
7.2

Electrical connection

DANGER! Risk of fatal accident!
Improper electrical connections pose a risk of fatal injury due to electric shock.
• Only allow the electrical connection to be made by an electrician approved by the local
power supply company and in accordance with the local regulations in force.
• Before working on the pump, all poles of the power supply must be disconnected.
Work on the pump/control module may only be started after 5 minutes have elapsed
due to the dangerous residual contact voltage.
• Check to ensure that all connections (including potential-free contacts) on the plug
are voltage-free. To do this, the plug must be opened.
• If the control module/plug is damaged, the pump must not be put into operation.
• If setting and operating elements are improperly removed, there is a danger of electric
shock if interior electrical components are touched.
• Connecting the pump to an uninterrupted power supply (UPS or IT power supply) is
prohibited.
CAUTION! Risk of damage to property!
An incorrect electrical connection can cause damage to property.
• If the wrong voltage is applied, the motor can be damaged!
• Control via triacs/semi-conductor relays must be checked on a case-by-base basis,
since the electronics can be damaged or the EMC (electromagnetic compatibility)
might be negatively affected.
• When the pump is switched on/off by external control devices, the mains voltage pulsing
(e.g. by a pulse packet control) must be deactivated to prevent damage to the electronics.
• The current type and voltage of the mains connection must correspond to the specifica-
tions on the rating plate.
• The electrical connection must be established via a fixed power cable (3 x 1.5 mm
mum cross-section), equipped with a plug and socket connector or an all-pole switch
with a minimum contact opening width of 3 mm.
• The following minimum requirements are to be met if shutdown takes place by means of
an on-site network relay: Rated current ≥ 10 A, rated voltage 250 VAC
• Fuse protection: 10/16 A, slow-blow or automatic fuse with C characteristic
• Double pumps: Provide a separate power cable and a separate fuse on the mains side
for both motors of the double pump.
• A motor protection switch supplied by the customer is not required. Nevertheless, if such
a protection switch is available in the installation, it must be bypassed or set to the highest
possible current.
• Leakage current per pump I
• It is recommended to safeguard the pump with a residual-current-operated protection
switch. Labelling: FI –
When dimensioning the residual-current-operated protection switch, take the number of
pumps connected and their nominal motor currents into account.
• A heat-resistant connecting cable must be used when using the pump in systems with
water temperatures of above 90°C.
• Under no circumstances may any connecting cables touch the pipeline or the pump or
motor housing.
Installation and operating instructions Wilo-Yonos MAXO/-D
≤ 3.5 mA (in acc. with EN 60335)
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English
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