Electrical Connections - Liberty Pumps Pro370 Serie Manual Del Usuario

Final Backfill
Large rocks, clods, and foreign objects should be kept out of the
backfill material. Only fine, 1/4" to 3/4" pea gravel, or 1/8" to 1/2"
washed, crushed stone is recommended. Do not use sand or
native soil as backfill. Mound the backfill slightly and allow for
natural settling. Provide access to the basin cover for maintenance
and service.
 Do not exert heavy pressure or run heavy equipment on the
backfill material as this could cause the tank to collapse.
Installation
RISK OF ELECTRIC SHOCK
 All installation and maintenance of pumps, controls,
protection devices, and general wiring shall be done by
qualified personnel.
 All electrical and safety practices shall be in accordance with
the National Electrical Code
Health Administration, or applicable local codes and
ordinances.
 700-Series are not suitable for outdoor applications.
 Pro370 and vertical discharge systems Pro380 and ProVore
380-Series systems require an Access Riser for outdoor use.
Consult Liberty Pumps for ordering information.
 Unless specifically noted, covers are not traffic rated.
 Do not increase 702/PRG system discharge pipe size above 2"
as adequate flow rates may not be achieved for proper
operation. Contact Liberty Pumps with questions regarding
proper pipe sizes and flow rates.

Electrical Connections

With main power disconnected, complete pump and control
wiring connections per manufacturer's wiring diagrams included
with the control panel as applicable. All wires should be checked
for unintentional grounds after the connections are made.
Discharge
 ProVore grinder systems including ProVore700-Series:
discharge size can be reduced to 1-1/4".
 Pro-Series, ProVore-Series and 700-Series non-grinder
systems: discharge size must not be smaller than 2".
Using an adapter, connect the discharge pipe to the threaded 2"
or 3" port provided on the cover (or the 2" PVC nipple used on
side discharge models).
In some applications, it may be necessary to increase the pipe size
to reduce friction losses. Contact Liberty Pumps with questions
regarding proper pipe sizes and flow rates.
7225000J
®
, the Occupational Safety and
Copyright © Liberty Pumps, Inc. 2020 All rights reserved.
Install the remaining discharge line. In vertical discharge
applications, a union should be installed just above the cover to
facilitate pump removal if necessary (side discharge applications
are equipped with an in-basin union).
For both vertical and side discharge systems, a check valve is
required after the union to prevent the backflow of liquid after
each pumping cycle. A gate or ball valve should follow the check
valve to allow periodic cleaning of the check valve or removal of
the pump. The remainder of the discharge line should be as short
as possible with a minimum number of turns, to minimize friction
head loss. Larger pipe sizes may be required to eliminate friction
head loss over long runs. Contact Liberty Pumps or other qualified
person if there are questions regarding proper pipe size and flow
rates.
Figure 9 shows a typical installation. Variations may apply to
actual installation.
Alarm
Vent
(optional)
Union
Figure 9. Typical Indoor Installation (Pro380-Series shown)
Vent
For both side and vertical discharge systems, the vent size must be
in accordance with applicable codes, but not less than the
discharge size.
On vertical discharge models, a threaded 2" or 3" connection is
provided on top of the cover. The vent must be piped to the
existing building vent, or extended outside on its own standpipe.
On side discharge models, venting is accomplished through the
inlet. See Figure 10 for Pro380-SD venting example through the
inlet pipe as an alternative solution.
Pro-Series systems shipped with steel pipe option have a rubber
grommet seal on the discharge instead of female NPT
connections.
Check Valve Ball Valve
Discharge
Use No-hub Style
Connector 4" Inlet Pipe
7 | EN