4
O & M Manual
EATON JOCKEY LITE
MN124001EN June 2018 www.eaton.com
2.4.3 Motor circuit protector / overload relay trip setting
The trip setting should be set to match the motor nameplate
full load amps.
2.4.4 Circuit breaker trip settings
When a Circuit Breaker is installed, the trip setting must be
set as indicated on the chart on the inside of the controller.
2.4.5 Run period timer (optional)
Adjust the run period timer dial to the desired run time
setting. Three rotary adjustment dials are provided on the
front of the timer.
(Ws) Single shot - leading edge with control input
The supply voltage, U, must be constantly applied to the
device (green LED U/t illuminated).
When the control contact, S, is closed, the output relay, R,
switches into the “on” position (green LED U/t illuminated)
and the set interval begins (green LED U/t flashes).
After the interval has expired (green LED U/t illuminated),
the output relay switches to to the “off” position (yellow
LED not illuminated).
During the interval, the control contact can be operated any
number of times.
A future cycle can only be started when the cycle run has
been completed.
2.4.6 Pressure switch setting instructions
Before attempting to set the pressure switch, de-energize
the jockey pump controller by opening the motor circuit
protector or the circuit breaker. This is done for safety and
so that the jockey pump will not start and interfere with the
adjustment procedure.
1. Set the differential adjustment on the pressure switch
to minimum by turning the differential adjusting screw
fully counter clockwise. Set the operating pressure to well
below the required pump starting pressure. Turn the range
adjusting screw clockwise to reduce the pressure and
observe the scale on the switch.
2. Bleed the fire protection water system until the pressure
is reduced to the required pump starting pressure. Hold this
pressure by closing the drain valve.
3. Slowly rotate the range adjusting screw counter
clockwise until a click is heard from the pressure switch.
The switch is now set to the required pump starting
pressure.
4. If it is necessary to re-adjust the differential, the operating
pressure of the switch will also be changed and should be
reset.
ote:
N
The cut-in (start point) pressure is the cut-out (range
adjusting setting) pressure minus the differential
setting.
