Wilo Yonos MAXO User Manual

en
Installation and operating instructions • Wilo-Yonos MAXO/-D/-Z • Ed.01/2022-08 25
CAUTION
Incorrect connection
Incorrect connection of the pump results in damage to the electronics.
• Observe the current type and voltage on the rating plate.
• Connect to 230V low-voltage networks. When connecting to IT networks (Isolé Terre electrical system), al-
ways make sure that the voltage between the live wires (L1-L2, L2-L3, L3-L1 ➜ Fig.3) does not exceed
230V.
In case of error (earth fault), the voltage between the live wire and PE must not exceed 230V.
• During external connection of the pump, deactivate a pulse of the voltage (for example phase angle con-
trol).
• Switching the pump via triacs/solid-state relays must be examined on a case-by-case basis.
• During deactivation with on-site power relay: Rated current ≥10A, rated voltage 250VAC
• Observe the switching frequency:
– Switch-on/off procedures via mains voltage ≤100/24h
– ≤20/h for a switching frequency of 1min. between switching on/off via mains voltage
• If a residual-current device (RCD) is used, it is recommended to use an RCD typeA (pulse current sensitive).
Check that the rules for the coordination of electrical equipment in the electrical installation are observed
and, if necessary, adjust the RCD accordingly.
• Observe leakage current I
eff
≤3.5mA for each pump.
• The electrical connection must be made via a fixed connecting cable equipped with a connector device or an
all-pole switch with a contact opening width of at least 3mm (VDE0700/Part1).
• To protect against leakage and for strain relief to the threaded cable gland, use a connection pipe with suf-
ficient outer diameter (see chapter “Connecting”).
• Use a heat-resistant connecting cable for fluid temperatures exceeding 90°C.
• Lay the connecting cable in such a way that it does not make contact with the pipes or the pump.
7.2 Connection options
Fig.3: Connection options
The pump can be connected to power supplies with the following voltage ratings:
• 1~230V

Wilo Yonos MAXO Specifications

General

Model	Yonos MAXO
Category	Water Pump
Protection Class	IPX4D
Max. Operating Pressure	10 bar
Frequency	50/60 Hz
Temperature Range	-20°C to +110°C
Energy Efficiency Index (EEI)	≤ 0.23
Application	Heating, cooling, and solar systems
Operating Modes	Constant pressure
Motor Protection	Integrated
Materials	Cast iron, stainless steel
Voltage	230 V
Ambient Temperature	Up to +40°C
Connection Size	DN 25
Power Supply	1~230 V, 3~400 V (depending on the model)