User Guide

x
The operating voltage and frequency are marked on the rating plate.
x
The pump must be connected with a power supply conductor equipped with a grounded plug-
connection and a main power switch (Fig.8 or Fig.9).
x
A minimum cable size of 14 AWG should be used (refer to the local code for wiring restrictions).
All conductors must be suitable for at least 194°F (90 °C).
x
The electrical cable must be installed so that it never touches the pipework and/or the pump
and motor housing.
x
The connecting cable can be fed through the cable entry either above or below the terminal
box. It is advisable to install the screwed cable glands with the entrance of the conduit poin-
ting downwards. The cable entry which is not used must be closed by a blind plug (Fig.5 and
Fig.6).
x
Watertight screwed cable glands and conduit connections must be used to prevent any ent-
rance of water to the terminal box.
x
Connect power as shown in Fig.5 and Fig.6.
x
Loosen the four terminal box screws and remove the screws and cover.
x
Feed the appropriate power supply conductor to the cable conduit on the side of the termi-
nal box (Fig.5 or Fig.6).
x
Connect the leads of the cable according to the L and N (for 1
~
) or L1, L2, and L3 (for 3
~
) ca-
ble entry respectively and the ground lead to the ground 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).
x
Replace the terminal box cover and tighten all four screws.
x
The pump/installation should be grounded in compliance with local regulations. A ground fault
interrupter can be used as extra protection.
x
A fused plug or circuit breaker in the power line is required.
x
The pump must be connected to the electrical supply via an external contactor to provide ther-
mal 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
x
Properly fill and pressurize the system with liquid.
x
The pump is normally vented automatically after a short operational period. TheTOP-S and
TOP-Z pumps which are equipped with a vent screw can be manually vented (Fig. 7). Please
observe the following procedure:
x
Turn the power to the pump off.
x
Close the valve on the discharge side.
NOTE!
ENGLISH
8
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.
WARNING!
Risk of burning if the pump is touched!
Depending on the operating condition of the pump and/or installation (fluid tempe-
rature) the pump/motor can become very hot.
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