Electrical Connections - ITT FLCG Serie Betriebsanleitung

ing the plug switch; capacitor in the terminal
block.
Three-phase: 400 V (± 10%), with plug switch.
4.3 MOTOR THERMAL OVERLOAD PRO-
TECTION
Single-phase: an internal thermal overload
protection is fitted.
Three-phase: an internal thermal overload pro-
tection is fitted.
For dual models, each motor is fitted with this
protection.
5. INSTALLATION
ATTENTION
possess the necessary qualifications for
this type of work.
The installer and/or maintenance firms and
their staff must be familiar with the con-
tents of this manual.
5.1 ASSEMBLY
- The circulator must always be installed with
the shaft horizontal (Fig. 1). Observe the di-
rection of flow indicated by the arrow on the
body (or on the flanges).
- Make sure the pipes are correctly aligned and
that the pump and pipes are suitably support-
ed. Avoid tight curves near the pump.
- If the circulator is mounted on vertical piping,
the flow must go upwards. If the flow goes
downwards, fit an air vent in the highest point
of the circuit before the pump inlet.
- Never allow the pump to work for a long time
with the dampers closed.
- Never mount the circulator at the lowest part
of the circuit as otherwise the impurities in the
system may deposit inside.
- Mount perfectly airtight dampers on both the
delivery and inlet lines of the circulator.
- Wash the system well before mounting the
circulator in order to eliminate the foreign
bodies in the circuit that could jam or other-
wise damage it.
Staff operating, servic-
ing, inspecting and in-
stalling the pump must
5.2 DIRECTION OF TERMINAL BLOCK
Never mount the circulator with the terminal block
facing downwards. If the terminal block is repo-
sitioned by turning the head, make sure that the
O-ring of the body is in the correct position.
If necessary, change the direction of the motor
and, consequently, the terminal block by loosen-
ing the screws securing the motor and turning it
to the required position.
ATTENTION
Never mount the circulator
with the terminal block fac-
ing downwards (6 o'clock) in
the presence of cold water (conditioning).
5.3

ELECTRICAL CONNECTIONS

Electrical
made by an authorised electrician
and in observance of the regula-
tions in force in the country.
Consult the motor rating plate for the relative
electrical specifications (frequency, voltage, rat-
ed current).
Connect the circulator to the mains as shown
in Fig. 2. Fit the cables into the terminal block
through the special grommets.
The circulators require an overload protection
device. The overload cut-out must be calibrated
to the current corresponding to the selected
speed.
Power supply
Single-phase 230 V: 3-wire cable connected to
terminals L, N + earth (Fig. 2).
Three-phase 230 V or 400 V: 4-wire cable con-
nected to terminals L1, L2, L3 + earth (Fig. 2).
Dual pumps should be fitted with 2 separate
lines for safety reasons.
Do not forget to connect the earth circuit.
ATTENTION
Take care not to damage
the gasket of the body
and remount it correctly.
connections must
Incorrect electrical con-
nections may damage
the motor.
en
be
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