17
if necessary (component 1 in
- Proper pump mounting for pipe support
) to
avoid stresses on connections.
- It is advisable that isolation valves (component
Figure 7j - page 12 -Proper pump
) are installed on the suction and
discharge side of the pump.
- Use of expansion joints mitigates noise and
to be operated with an on-off valve closed,
install a bypass line to avoid damaging the
pump. Do not place elbows next to the pump
intake and discharge. Refer to
F
- The nominal cross-section of the suction pipe
should be at least as large as that of the pump
connection.
- A check valve (component 4 in
on the discharge pipe in order to protect the
pump against hammer shock.
- For direct connection to a water main, a
11-Storage tank or water main installation
recommended.
- For indirect connection via a tank, the suction
pipe must have a strainer (component 8 in
Fig. 7h-page 11-Storage tank or water main
) to keep any impurities out of the
pump.
7.5 Motor connection for bare-shaft pump
(without motor)
- Remove coupling guards.
- Install the motor on the pump by using screws
or bolts, nuts and handling devices provided
with the pump: check motor power and
dimension in Scot catalogue.
NOTE:
Depending on fluid characteristics,
motor power could be modified. Contact Scot
Customer Service if needed.
- Close the coupling guards using all screws
provided with the pump
. Allow for sufficient
space above the motor to facilitate proper
motor cooling. Refer to
.
7.6 Electrical connections
DANGER! Danger of death!
National Electrical Codes (NEC), local codes and
regulations must be followed.
WARNING! Electrical shock hazard!
All electrical work must be conducted by a
qualified electrician! Make sure that the supply
voltages and frequencies, and phase are suitable
for the motor used.
• All electrical connections must be locked out
before performing any electrical task. Assure that
the control panel (component 5 in
) conforms to local
standards and regulations.
• For safe installation and operation, the motor
must be properly grounded.
NOTE: Integral solid state short circuit protection
does not provide branch circuit protection. Branch
circuit protection must be provided in accordance
with the Manufacturer Instructions, National
Electrical Code and any additional local codes.
• The electric characteristics (frequency, voltage,
nominal current) of the motor-converter are
mentioned on the pump identification sticker.
Check that the motor complies with the mains
supply used.
• Install correct electrical overloads and breakers to
protect the installation mains voltage.
NOTE: Install a circuit-breaker for user
protection, it must have a delay effect. Adjust it
according to the current mentioned on the motor
nameplate.
• Use power cables conforming to NEMA and NEC
standards.
Connection terminal allocation
• Loosen the screws and remove the converter
cover.
• Refer to wiring diagram inside the motor junction
box.
8. Start up
8.1
System filling - Venting
CAUTION! Possible damage of the pump!
Never operate the pump dry. The system must be
filled before starting the pump.
8.1.1
Venting – (Fig. 7h-page 11-Storage tank or
- Close the two isolation valves (components 5
and 9 in
Fig. 7h-page 11-Storage tank or water
- Unscrew the air bleed screw in the vent plug (com-
ponent 3 in
Fig. 7h-page 11-Storage tank or
).
- Slowly open the isolation valve on the suction side
- Retighten the air-bleed screw when air escapes
at the air bleed screw and the pumped liquid
flows.
WARNING!
When the pumped liquid is hot and the pressure
high, the stream escaping at the air bleed screw
may cause burns or other injuries.
- Open the isolation valve on the suction side
completely.
- Start the pump and check if the direction of
rotation matches the one printed on pump
volute.
Installation and operating instructions - MVI 5, 15, 20, 50, 75, 100, 160, 225, 320, 450, 600, 750
Содержание MVI 15
Страница 8: ...MVI 600 750 Fig 6c MVI 600 750 Section View Fig 7a Proper Installation Clearances 10 8...
Страница 12: ...Figure 7j Proper pump mounting 5 1 2 3 3 4 2 1 6 7 Fig 7k Proper piping 12...
Страница 21: ...21 Installation and operating instructions MVI 5 15 20 50 75 100 160 225 320 450 600 750...
