Wilo TOP-S Instrucciones De Instalación Y Funcionamiento página 16

English
• Watertight screwed cable glands and conduit connections must be used to
prevent any entrance of water to the terminal box.
• Connect power as shown in Fg. 5 and Fg. 6.
• Loosen the four terminal box screws and remove the screws and cover.
• Feed the appropriate power supply conductor to the cable conduit on the side
of the terminal box (Fig.5 or Fig.6).
• Connect the leads of the cable according to the L and N (for 1 ~) or L1, L2, and
L3 (for 3 ~) cable entry respectively and the ground lead to the
screw (Fig. 6, Pos. 3 for1 ~) or (Fig. 5 Pos. 4 for 3 ~). If the power supply is
connected the LED inside the terminal box will show green (Fig. 5/6, Pos. 2).
• Replace the terminal box cover and tighten all four screws.
• The pump/installation should be grounded in compliance with local regulations.
A ground fault interrupter can be used as extra protection.
• A fused plug or circuit breaker in the power line is required.
• The pump must be connected to the electrical supply via an external contactor
to provide thermal overload protection. The contactor must be connected to
the built-in thermal overload switch terminals P1 and P2 (potential-free
normally closed contact, contact load 250 VAC/1A) to protect the pump against
thermal overloading at all speeds.
Or: If the pump is protected by means of a motor starter, the starter must be set
to the current consumption of the pump at the selected speed. The motor
starter setting must be changed every time the pump speed is changed. The
current consumption at the individual speeds is stated on the pump rating plate.
8 Start up
8.1 System filling - Venting
• Properly fill and pressurize the system with liquid.
CAUTION! Possible damage of the pump!
Never operate the pump dry.
The system must be filled before starting the pump. Ensure that all isolation
valves are open.
• The pump is normally vented automatically after a short operational period.
TheTOP-S pumps which are equipped with a vent screw can be manually vented
(Fig. 7). Please observe the following procedure:
• Turn the power to the pump off.
WARNING! Risk of burning if the pump is touched!
Depending on the operating condition of the pump and/or installation (fluid
temperature) the pump/motor can become very hot.
• Close the valve on the discharge side.
WARNING! Risk of scalding!
Depending on the fluid temperature and the system pressure, if the vent
screw is completely loosened hot liquid or vapour can escape or even shoot
out at high pressure.
10 Subject to technical alterations!
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ground
WILO SE 02/2016