Electrical Requirements; Pump Installation - Lowara ecocirc XL Serie Montage-, Betriebs- Und Wartungshandbuch

Guidelines
Observe the following guidelines regarding the lo-
cation of the product:
• Make sure that the installation area is protected
from any fluid leaks, or flooding.
• If possible, place the pump slightly higher than
the floor level.
• Provide shut-off valves in front of and behind
the pump.
• The relative humidity of the ambient air must be
less than 95%.
4.2.2 Minimum inlet pressure at the
suction port
The values in the table are the inlet pressure above
the atmospheric pressure.
Nominal Fluid tem-
Diameter perature
25°C
RP 1 0.2 bar
RP 1 ¼ 0.2 bar
DN 32 0.3 bar
DN 40 0.3 bar
DN 50 0.3 bar
DN 65 0.5 bar
DN 80 0.5 bar
DN 100 0.5 bar
NOTICE:
• Do not apply a pressure lower than the values
specified as this could cause cavitation and
damage the pump.
• The inlet pressure plus the pump pressure
against a closed valve must be lower than maxi-
mum admissible system pressure.
4.2.3 Piping requirements
Precautions
WARNING:
• Use pipes suited to the maximum
working pressure of the pump. Fail-
ure to do so can cause the system to
rupture, with the risk of injury.
• Make sure that all connections are
performed by qualified installation
technicians and in compliance with
the regulations in force.
• Do not use the on-off valve on the
discharge side in the closed position
for more than a few seconds. If the
pump must operate with the dis-
charge side closed for more than a
few seconds, a bypass circuit must
be installed to prevent overheating
of the water inside the pump.
Piping checklist
• Pipes and valves must be correctly sized.
Fluid tem- Fluid tem-
perature perature
95°C 110°C
1 bar 1.6 bar
1 bar 1.6 bar
1.1 bar 1.7 bar
1.1 bar 1.7 bar
1.1 bar 1.7 bar
1.3 bar 1.9 bar
1.3 bar 1.9 bar
1.3 bar 1.9 bar
en - Translation of the original instructions
• Pipe work must not transmit any load or torque
to pump flanges.

4.3 Electrical requirements

• The local regulations in force overrule specified
requirements listed below.
Electrical connection checklist
Check that the following requirements are met:
• The electrical leads are protected from high
temperature, vibrations, and collisions.
• The current type and voltage of mains connec-
tion must correspond to the specifications on
the data plate on the pump.
• The power supply line is provided with:
• A high-sensitivity differential switch (30 mA)
[residual current device RCD] suitable for
earth fault currents with DC or pulsating DC
content (a Type B RCD is suggested).
• A mains isolator switch with a contact gap of
at least 3 mm
The electrical control panel checklist
NOTICE:
The control panel must match the ratings of the
electric pump. Improper combinations could fail to
guarantee the protection of the unit.
Check that the following requirements are met:
• The control panel must protect the pump
against short-circuit. A time lag fuse or a circuit
breaker (Type C model is suggested) can be
used to protect the pump.
• The pump has built in overload and thermal
protection, no additional overload protection is
required.
The motor checklist
Use cable according to rules with 3 leads (2 +
earth/ground). All cable must be heat-resistant up
to +85°C (185°F).

4.4 Pump installation

1. Install the pump according to the systems liq-
uid flow.
• The arrow on the pump housing shows the
flow direction through the pump.
• The pump must be installed with the pump
head in a horizontal position. For more in-
formation about allowed positions, see
ure 12
2. If necessary, rotate the position of the pump
head for better reading of the user interface.
For more instructions, see
of the pump head.
3. If applicable, install the thermal shells.
• Only use the pump thermal shells that are
included in the delivery. Do not insulate the
motor housing, the electronics can over-
heat so that the pump automatically switch
off.
• The thermal shells that are included in the
delivery must only be used in hot water cir-
culation applications with fluid temperature
above 20°C (68°F). The thermal shells are
Fig-
Change the position
19