Pentair STA-RITE DHI 2-40 Instructions De Service page 28

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  • FRANÇAIS, page 35
EN
ENVIRONMENTAL CONDITIONS
Acceptable temperature range:
+7 °C ÷ +50 °C
CONNECTION
The pipes used to connect the machine should have the following characteristics:
Minimum diameters with dimensions
suited to the machine
The distance and position of the
two pipes should comply with the
indications given in
"Product specifications", paragraph
"Dimensions and weights"
Anchoring to fixed support in order not
to exert tension and/or vibrations on
the machine
If the machine is designed to operate with a closed valve on the delivery line, a recirculation pipe should be provided for protection
purposes. The pipe should have the following characteristics:
Accumulated air
POWER SUPPLY
Electric power supply should have the following characteristics:
Offer a differential protection
Offer voltage and frequency values
compliant with the values indicated on
the motor nameplate
Offer a power not below the value
indicated on the motor nameplate
ACCESS
Connect the machine so that it can be easily accessible for maintenance operations.
26
Acceptable relative humidity range:
30 ÷ 90%
Lack of air locks, as shown in the
piping figure
Suction pipe length reduced to a
minimum
Load losses in the suction pipe
reduced to a minimum (if the machine
is used to suck fluid, see "Machines
installed above the water level")
Gates on the delivery and suction line
PIPE ASSEMBLY
Incorrect
Be equipped with an appropriate
thermal protection
Be equipped with a thermal relay
adjusted according to the actual
current absorbed
Correct
Protection from atmospheric agents
If the machine is installed above water
level, a stop valve should be fitted on
the suction line
If the machine supplies a boiler, a
stop valve should be fitted on the
delivery line
Connection between:
Delivery and suction line
Delivery and drainage pipe
Controls should be performed by means
of:
Thermostatic valve
Solenoid valve driven by a pressure
switch or a thermostat
Be equipped with a cut-off switch with
protective fuses
Be equipped with cables with a section
suitable to the power absorbed by
the motor

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