Wilo Stratos MAXO User Manual

en
Installation and operating instructions Wilo-Stratos MAXO/-D/-Z 39
NOTICE
Nationally applicable guidelines, standards and regu-
lations as well as the requirements of local energy
supply companies must be observed!
CAUTION
Material damage caused by improper electrical connec-
tion!
Wrong connection of the pump leads to damage to the electron-
ics.
Applying incorrect voltage to SELV lines will result in incorrect
voltage in all pumps and on-site building automation devices,
which are connected to the SELV line, and can damage them!
▪Observe the current type and voltage on the rating plate.
▪Minimum back-up fuse: 16A, slow-blow or circuit breaker with
Ccharacteristic.
▪In the case of twin-head pumps, individually connect and secure
both motors.
▪Connect to 230 V low-voltage networks. When connecting to IT
networks (Isolé Terre electrical system), always make sure that the
voltage between the live wires (L1-L2, L2-L3, L3-L1 ➜ Fig.14C)
does not exceed 230 V. In case of error (ground fault), the voltage
between the live wire and PE must not exceed 230 V.
▪When switching the pump on or off using an external control
device, deactivate any mains voltage pulse (e.g. burst-fired con-
trol)!
▪Switching the pump via triacs/solid-state relays must be examined
on a case-by-case basis.
▪Make sure that the SELV lines have a maximum voltage of 24V!
▪During deactivation with on-site power relay: rated current ≥10A,
rated voltage 250VAC
▪Irrespective of the rated current of the pump, inrush peak currents
of up 10A may occur when the power supply is activated!
▪Observe the switching frequency:
– Switch-on/off procedures via mains voltage ≤100/24h
– Switch-on/off procedures via Ext. Off, 0–10V, or via bus com-
munication ≤20/h (≤480/24h)
▪It is advisable to protect the pump with a residual-current device
(type A or B in accordance with EN 60335).
▪Consider the leakage current per pump I
eff
≤ 3.5 mA.
▪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 connection use a connection pipe with sufficient outer dia-
meter ➜Fig.16. The cables near the screwed connection are to be
bent to form a drainage loop, to drain any accumulated drips.
▪Use a heat-resistant connecting cable where fluid temperatures
exceed 90°C.
▪Lay the connecting cable in such a way that it does not make con-
tact with the pipes or the pump.
Cable requirements
Terminals are intended for rigid and flexible conductors without
ferrules.

Wilo Stratos MAXO Specifications

General

Product Name	Wilo Stratos MAXO
Category	Water Pump
Control Type	Electronic
Display	LCD
Temperature Range	-10°C to +110°C
Motor Type	EC Motor
Power Supply	1~230 V, 50/60 Hz
Voltage	230 V
Frequency	50/60 Hz
Pump Type	Circulation Pump
Application	Heating, Cooling
Energy Efficiency Index	EEI ≤ 0.20
Max Operating Pressure	10 bar
Operating Mode	Constant Speed
Material	Cast Iron, Stainless Steel
Connection Size	DN 32 to DN 100