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Wiring Diagram
2
3
4
Pump Operation (See Illustration 2)
• When a lube cycle is initiated by the timer, the 4-way solenoid valve
is energized, allowing compressed air to enter the left side of the
Air Cylinder. The piston with plunger moves to the right, dispensing
the charge of lubricant from the bushing cavity.
• When the pump "On" time expires, the
de-
energized routing the air pressure to the right side of the air piston
and venting the air on the left side of the air piston to the exhaust
port in the cylinder head. The air piston and plunger move back to
the left. In its extreme left position, the plunger has retracted
opening the bushing port, permitting lubricant to flow into the
bushing cavity.
• Lubricant pressure from the supply line is allowed to "vent"
back through the Ball Check into the bushing cavity, thus allowing
the injectors to reset.
Installing the Pump
(See Illustrations 3, 4 & 5)
• Pump must be mounted with the reservoir in a vertical position.
• Mount to an even, stable and solid surface.
• Mount with two 1/2" [12 mm] screws. (2 mounting holes are
provided on back of pump body).
• Mount in area away from dust, dirt and moisture (pumps are not
designed for wash down environments or for outside weather
conditions).
• Allow sufficient space for servicing, filling and operating the pump.
• Mount in an area where the pump can be observed for monitoring
lubricant level and pump operation, unless auxiliary-monitoring
Form 403569
1
5
solenoid valve is
4.1A-68020-E05
CENTRO-MATIC
Wiring Diagram
1. L1
2. L2
3. Air Solenoid Valve
7
4. Optional Alarm wired by customer
5. Keypad with indicator lights and
6. Optional Low Level Switch wired by
7.
6
equipment is installed.
Electrical Connections
(See Wiring Diagram)
• A terminal wiring diagram is located on the backside of the keypad
assembly.
• One 1/2" conduit opening is provided on the left side of the Timer/
Controller enclosure. An additional 1/2" conduit knock out is located
adjacent to the opening.
• All wiring and fusing is to be in accordance with the National
Electric Code or regulations of the regulating agency where the unit
is to be
installed.
Optional Devices
Pressure Switch
• Model 69630 pressure switch should be installed in the supply line
to the injectors.
• The pressure switch must be wired "Normally Open" with
connections to low voltage terminals 3 & 4. See Wiring Diagram.
• The mode switch on the timer/controller board must be set for
Controller operation for the pressure switch to be effective.
• The pressure switch should be adjusted to a pressure high enough
to insure proper system operation.
• Switch Ampacity: 1 MA at 5 VDC.
manual lube push button
customer
Optional Pressure Switch wired by
customer
Page Number - 5
®
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