Graco 3A1827B User Manual
Instructions
Set / Reset Point
3A1827B
Pressure Switch
Set and reset point pressure switch used to
detect pressure changes.
Not approved for use in European explosive
atmospheres.
Models: 24K414
Equivalent: IFM Electronic GMBH PK6220
Maximum Working Pressure: 5800 psi (400 bar, 40
MPa)
Important Safety Instructions
Read all warnings and instructions in this manual
and the instructions included with your operating
system or pump. Save these instructions.
ENG
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point
symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When these symbols
appear in the body of this manual, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this
manual where applicable.
WARNING
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper grounding,
setup, or usage of the system can cause electric shock.
• Turn off and disconnect power at main switch before
disconnecting any cables and before servicing
equipment.
• Connect only to grounded power source.
• All electrical wiring must be done by a qualified
electrician and comply with all local codes and
regulations.
SKIN INJECTION HAZARD
High-pressure fluid from dispense device, hose leaks, or
ruptured components will pierce skin. This may look like
just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treatment.
• Do not point dispense device at anyone or at any
part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body,
glove, or rag.
• Follow Pressure Relief Procedure in this manual,
when you stop dispensing and before cleaning,
checking, or servicing equipment.
• Tighten all fluid connections before operating the
equipment.
• Check hoses and couplings daily. Replace worn or
damaged parts immediately.
CUS
Pressure Relief Procedure
Relieve pressure in the system following the procedure
recommended for your operating system or pump.
Installation
NOTICE
• Electrical ratings must not be exceeded. Overload on a switch can cause switch to fail on the
first cycle.
• Never exceed pressure limits. Unit can be operated up to maximum pressure on a limited basis
(i.e., set-up, testing) but continuous operation
must be restricted to the designated adjustable
range. Excessive cycling at maximum pressure
limits could reduce sensor life.
FIG. 1
2. Adjust set point to the desired pressure setting.
2500 psi (172 bar, 17.2 MPa) is the factory default
setting.
3. Adjust the reset point to the desired pressure setting. 500 psi (35 bar, 3.5 MPa) is the factory default
setting.
4. Rotate the top portion of the switch to align the lock
symbol with the two white arrows (F
IG. 2).
1. Disconnect power to pump.
2. Disconnect cable from switch.
3. If replacing a pressure switch on an existing installation, relieve pressure.
4. Locate unit where shock, vibration and ambient temperature fluctuations are minimal. Do not mount in
ambient temperature areas exceeding 160°F
(71°C).
• Unit may be mounted in any position. However,
if installation location results in frequent exposure to liquid it is recommended that the unit be
mounted vertically with the pressure connection
down.
5. Screw switch into manifold. Always use a wrench on
pressure connection wrench flats.
6. Test unit before use.
Adjustments
1. Rotate the top portion of switch (with the lock and
unlock symbols) to align the unlock symbol with the
two white arrows (F
IG. 1).
F
IG. 2
5. Recheck set point and reset point and install switch
according to installation instructions.
Status LED’s
Steady Green
LED
Yellow LED turns
off and on
Power is supplied to pressure switch.
When you reach pressure, yellow LED
lights. When pressure drops below reset
value, yellow LED turns off.
2 3A1827B
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