Wilo Stratos MAXO Notice De Montage Et De Mise En Service page 31

• If a residual-current device (RCD) is used, it is recommended to use an RCD type A (pulse current sensi-
tive). Check that the rules for the coordination of electrical operating fluid in the electrical installation are
observed and, if necessary, adjust the RCD accordingly.
• Consider the leakage current per pump Ieff ≤ 3.5 mA.
• Connect to 230 V low-voltage power supply. When connecting to IT networks (Isolé Terre electrical sys-
tem), always 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 (ground fault), the voltage between the live wire and protective ground (PG) must not ex-
ceed 230 V.
• Establish the electrical connection via a fixed connection cable equipped with a connector device or an all-
pole switch with a contact opening width of at least 0.12 inch.
• The pump can be operated on an uninterruptible power supply.
• 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.
• For deactivation with on-site power relay: Rated current ≥ 10 A, rated voltage 250 V AC.
Irrespective of the rated current of the pump, peak currents of up 10 A may occur every time the power
supply is switched on!
• Consider switching frequency:
– Switch-on/off procedures via power supply voltage ≤ 100/24 h
• Increased number of switch-on/off procedures ≤ 20/h (≤ 480/24 h) permissible with:
–
Digital input with ext. OFF function
–
Analog setpoint input (0 ... 10 V) with switch-off function
–
Switch signals using communication interfaces (e.g. CIF module, Wilo Net, or Bluetooth)
• To protect against leakage and for strain relief to the threaded cable gland, use a connection cable with
sufficient outer diameter.
• Bend the cable to form a drain loop in the vicinity of the screwed connection to dissipate any drips.
• Use a heat-resistant connection cable if fluid temperatures exceed 194 °F (90 °C).
• Lay the connection cable in such a way that it touches neither the pipes nor the pump.
Cable requirements
Terminals are intended for rigid and flexible conductors with or without ferrules.
Connection
Mains plug
SSM (FAULT)
SBM (RUN)
Digital input 1 (DI1)
Digital input 2 (DI2)
24 V output
Analog input 1 (AI1)
Installation and operating instructions • Wilo-Stratos MAXO/-D/-Z • Ed.02/2023-10
Cable cross-section
Min.
3x16 AWG
2x24 AWG
2x24 AWG
2x24 AWG
2x24 AWG
1x24 AWG
2x24 AWG
Cable cross-section
Max.
3x14 AWG
2x16 AWG
**
(17 AWG )
2x16 AWG
**
(17 AWG )
2x16 AWG
**
(17 AWG )
2x16 AWG
**
(17 AWG )
1x16 AWG
**
(17 AWG )
2x16 AWG
**
(17 AWG )
en-US
Cable
*
*
*
*
*
*
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