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4.
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 contents of this manual.
4.1
ASSEMBLY
- Always install the pump with the shaft hori-
zontal. Observe the direction of flow indicat-
ed by the arrow on the body (see Fig. 1).
- 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 pump 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 in the pump.
- Mount perfectly airtight dampers on both the
delivery and inlet lines of the pump.
- Wash the system well before mounting the
pump in order to eliminate the foreign bod-
ies in the circuit that could jam or otherwise
damage it.
4.2
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
correctly.
14
Staff operating, servic-
ing, inspecting and in-
stalling the pump must
Take care not to dam-
age the gasket of the
body and remount it
Never mount the circulator
with the terminal block fac-
ing downwards (6 o'clock) in
the presence of cold water (conditioning).
4.3
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).
The pump does not require external protection
but it must be earthed.
The instructions for connecting the cables can
be found on the pump terminals (fig. 3).
5.
START-UP
5.1
FILLING AND VENTING
ATTENTION
short time in order to prevent damage to
the bearings as these are lubricated with
system water.
After the system has been filled and pressurised,
if required and before start-up, vent the air from
the circulator by removing the cap in the centre
of the identification plate (fig. 2).
5.2
ADJUSTMENTS
There are 2 ways of adjusting the pump:
- Control for following specific differential pres-
sure values at different flow rates (auto). All
EFLC pumps are fitted with a PLC (Pressure
Loss Compensation) in the control system
which prevents the pump from following a
constant differential pressure and makes it
follow the pressure reduction required as flow
decreases.
- Control for following a constant speed for sys-
tems with constant demand (1-4).
Adjustment is performed using the switch on
the terminal block (fig. 4).
connections
must
If the system is not filled
with water, only oper-
ate the circulator for a
be
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