Liberty Pumps PDC-Series - Manual (Page 3)

©Copyright 2013 Liberty Pumps Inc. All rights reserved 3
Models: PDCW-115 and PDCW-230 require hard
wiring, the inner panel must be removed to provide
access to the terminal block(s) inside the panel. The
plug of the pumps and switch must be cut off and wires
stripped. Feed the cords, along with the incoming
power, through the water tight strain relief bushings
and wire into the terminal block mounted in the PDC
panel. A wiring schematic is provided beside the
terminal block. The panel has a secondary terminal
block for auxiliary contacts if required.
The controller normally operates on primary power
(115Vac or 230Vac), but if that power fails, an internal
9 volt battery allows the controller to monitor liquid
level and to activate the alarm if required.
On alarm backup power ( 9 volt ), the controller cannot
run the pumps. Pumps will only operate when primary
power is supplied to the control panel.
On alarm backup power, the operator can test the
alarm circuits and can change the horn enable/disable
status. Since pumps do not operate while the controller
is on alarm backup power, the manual run feature will
not be functional.
General operation
– On primary Power (115Vac or 230Vac)
The PDC panel controls the operation of two ProVore
®
grinder pumps in a pump-down application. Two floats are
mounted to the quick tree: a primary pump control float switch and an alarm float switch. On the front panel of the
controller are indicators that show various operating conditions such as pump run status, alarm status, horn
enable/disable status, and other conditions. Operator push-button controls are available to manually run the pumps, to
manually test the alarm, and to disable or enable the alarm horn, as well as reset the system. Both pumps are individually
protected with a manual reset fuse to isolate a failed pump.
When the incoming water activates the primary pump switch, the controller will energize one of the pumps. Normally the
water level in the sump will recede as the pump operates; the pump will turn off when the primary pump switch drops to
the off position. Upon the next pumping cycle the controller will activate the next pump in sequence from the one that ran
previously, providing a pumping redundancy for the system. The controller will continue to alternate pumps on each cycle
.
Alarm Operation
In the event water fills the tank faster than it can be pumped out, or if a pump fails to operate, the level can reach an alarm
point by flipping the alarm float switch. The following occurs when an alarm condition activates:
1) The pump that is (or should be) running is turned OFF and the next pump in sequence is turned ON.
2) If the Alarm float remains closed (up position) for 4 sec. the alarm indicator on the front panel of the controller will
illuminate solid
3) The auxiliary relay will activate, closing its normally open contacts and opening its normally closed contacts.
4) If the horn is enabled (i.e. its indicator is NOT flashing) the horn will sound.
Note, an alarm condition will remain active until the liquid level drops below the Pump Float switch. When that occurs, the
following things will take place:
1) The running pump will turn OFF.
2) The front panel alarm indicator will turn OFF.
3) The auxiliary relay will de-activate.
4) The horn (if on) will turn OFF.
If the alarm float remains closed (up position) for 6 hours but the primary float switch is open (down position) the alarm
light will flash and the pump is turned off. This feature prevents the pump from running indefinitely
.
Indoor Models:
PDC-115
PDC-230