Senco PC0968N User manual

PC0968N, PC0969, PC0970 • Revised February 6, 2015 (Replaces 6/20/2013)
© 2015 by Senco Brands, Inc.

2
Table Of Contents
Introduction.................................................................................................................................................... 3
Inspection ...................................................................................................................................................... 3
Safety Warnings............................................................................................................................................ 4
Compressor Features ................................................................................................................................... 8
Preparation.................................................................................................................................................. 10
Initial Set-Up ......................................................................................................................................... 10
Location ................................................................................................................................................ 10
Electrical ............................................................................................................................................... 10
Operation..................................................................................................................................................... 11
Pre-Start Checklist................................................................................................................................ 11
Start-Up ................................................................................................................................................ 11
Shutdown.............................................................................................................................................. 11
Maintenance................................................................................................................................................ 11
Troubleshooting .......................................................................................................................................... 12
Compressor Specifications ......................................................................................................................... 14
Limited Warranty ......................................................................................................................................... 15
Parts Reference Guide PC0968N ............................................................................................................... 16
Parts Reference Guide PC0969 ................................................................................................................. 17
Parts Reference Guide PC0970 ................................................................................................................. 18

3
Introduction
Congratulations on the purchase of your new SENCO® Air Compressor! You can be assured your
SENCO Air Compressor was constructed with the highest level of precision and accuracy. Each
component has been rigorously tested by technicians to ensure the quality, endurance and performance
of this air compressor.
This operator’s manual was compiled for your benefit. By reading and following the simple safety,
installation and operation, and maintenance steps described in this manual, you will receive years of
troublefree operation from your new SENCO Air Compressor. The contents of this manual are based on
the latest product information available at the time of publication. The manufacturer reserves the right to
make changes in price, color, materials equipment, specifications or models at any time without notice.
Safety Alert!
A “DANGER, WARNING or CAUTION” safety warning will be surrounded by a “SAFETY ALERT
BOX.” This box is used to designate and emphasize Safety Warnings that must be followed when
operating this air compressor. Accompanying the safety warnings are “Signal Words” which
designate the degree or level of hazard seriousness. The “Signal Words” used in this manual are
as follows:
DANGER: Indicates an imminently hazardous situation which, if not avoided,
WILL result in death or serious injury.
WARNING: Indicates an imminently hazardous situation which, if not avoided,
COULD result in death or serious injury.
CAUTION: Indicates an imminently hazardous situation which, if not avoided
MAY result in minor or moderate injury or damage to the air
compressor.
The symbols set to the left of this paragraph are “Safety Alert
Symbols.” These symbols are used to call attention to items
or procedures that could be dangerous to you or other
persons using this equipment.
ALWAYS PROVIDE A COPY OF THIS MANUAL TO ANYONE USING THIS EQUIPMENT. READ ALL
INSTRUCTIONS IN THIS MANUAL AND ANY INSTRUCTIONS SUPPLIED BY MANUFACTURERS
OF SUPPORTING EQUIPMENT BEFORE OPERATING THIS AIR COMPRESSOR AND ESPECIALLY
POINT OUT THE “SAFETY WARNINGS” TO PREVENT THE POSSIBILITY OF PERSONAL INJURY
TO THE OPERATOR.
Inspection
Unbox the air compressor and write in the serial number in the space provided below. Inspect for signs of
obvious or concealed freight damage. Be sure that all damaged parts are replaced and any mechanical
problems are corrected prior to the operation of the air compressor.
SERIAL NUMBER__________________________________________
If you have Questions or Comments call SENCO’s toll-free Action-line: 1-800-543-4596 or, e-mail:
[email protected]
Please have the following information available for all service calls:
1. Model Number
2. Serial Number
3. Date and Place of Purchase
Senco, 4270 Ivy Pointe Blvd., Cincinnati, OH 45245

4
Safety Warnings
Read All Safety Warnings Before Using Air Compressor
Hazard Potential Consequence Prevention
Risk of
Electric Shock
or
Electrocution
Serious injury or death could
occur if the air compressor is
not properly grounded. Your air
compressor is powered by
electricity and may cause
electric shock or electrocution if
not used properly.
Make sure the air compressor is
plugged into a properly
grounded outlet which provides
correct voltage and adequate
fuse protection.
Electrical shock may occur from
electrical cord.
Check power cord for signs of
crushing, cutting or heat
damage. Replace faulty cord
before use.
Keep all connections dry and off
the ground. Do not allow
electrical cords to lay in water or
in such a position where water
could come in contact with
them. Do not touch plug with
wet hands.
Do not pull on the electrical cord
to disconnect from the outlet.
Electrical shock may occur if air
compressor is not operated
properly.
Never operate air compressor in
wet conditions or outdoors
when it is raining.
Never operate air compressor
with safety guards/covers
removed or damaged.
Serious injury or death may
occur if electrical repairs are
attempted by unqualified
persons.
Any electrical wiring or repairs
performed on this air
compressor should be done by
Authorized Service Personnel in
accordance with National and
Local electrical codes.
Before opening any electrical
enclosure, always shut off the
air compressor, relieve pressure
and unplug the air compressor
from the power source. Allow air
compressor to cool down.
Never assume the air
compressor is safe to work on
just because it is not operating.
It could restart at any time!

5
Safety Warnings
Read All Safety Warnings Before Using Air Compressor
Hazard Potential Consequence Prevention
Risk of
Explosion or Fire
Serious injury or death may
occur from normal electrical
sparks in motor and pressure
switch.
Always operate air compressor
in a well ventilated area free of
flammable vapors, combustible
dust, gases or other
combustible materials.
If spraying flammable material,
locate the air compressor at
least 6 meters away from the
spray area. (An additional hose
may be required.)
Serious injury may occur if any
air compressor ventilation
openings are restricted, causing
the air compressor to overheat
and start on fire.
Never place objects against or
on top of air compressor.
Operate air compressor at least
30 cm away from any wall or
obstruction that would restrict
proper ventilation.
Risk of
Bursting
Serious injury or death may
occur from an air tank explosion
if air tanks are not properly
maintained.
Drain air tank daily or after each
use to prevent moisture buildup
in the air tank.
If air tank develops a leak,
replace the air tank
immediately. Never repair, weld
or make modifications to the air
tank or its attachments.
Never make adjustments to the
factory set pressures.
Serious injury may occur from
an air compressor malfunction
or exploding accessories if
incorrect system components,
attachments or accessories are
used.
Never exceed manufacturer's
maximum allowable pressure
rating of attachments.
Because of extreme heat, do
not use plastic pipe or lead tin
soldered joints for a discharge
line.
Never use air compressor to
inflate small, low pressure
objects such as toys.
All hoses and fittings shall be
suitable for site use at the
maximum allowable working
pressure of the portable
compressor.
Use only genuine SENCO®
repair parts for your air
compressor.

6
Safety Warnings
Read All Safety Warnings Before Using Air Compressor
Hazard Potential Consequence Prevention
Risk to
Breathing
Serious injury or death could
occur from inhaling compressed
air. The air stream may contain
carbon monoxide, toxic vapors
or solid particles.
Never inhale air from the air
compressor either directly or
from a breathing device
connected to the air
compressor.
Sprayed materials such as
paint, paint solvents, paint
remover, insecticides, weed
killers, etc. contain harmful
vapors and poisons.
Operate air compressor only in
a well ventilated area. Follow all
safety instructions provided with
the materials you are spraying.
Use of a respirator may be
required when working with
some materials.
Risk of
Burns
Serious injury could occur from
touching exposed metal parts.
These areas can remain hot for
some time after the air
compressor is shut down.
Never allow any part of your
body or other materials to make
contact with any exposed metal
parts on the air compressor,
motor, or pipework.
Risk of
Flying Objects
Soft tissue damage can occur
from the compressed air
stream.
Always wear OSHA required
“Z87” safety glasses to shield
the eyes from flying debris.
Never point the air stream at
any part of your body, anyone
else or animals.
Never leave pressurized air
compressor unattended. Shut
off air compressor and relieve
pressure before attempting
maintenance, attaching tools or
accessories.
Eye Protection
Must Be Worn
Serious injury can occur from
loose debris being propelled at
a high speed from the
compressed air stream.
Always maintain a safe distance
from people and animals while
operating the air compressor.
Do not move the air compressor
while air tank is under pressure.
Do not attempt to move the air
compressor by pulling on the
hose.

7
Safety Warnings
Read All Safety Warnings Before Using Air Compressor
Hazard Potential Consequence Prevention
Risk from
Moving Parts
Warning:
Unit May Start
Without Warning
Risk of bodily injury from
moving parts. This air
compressor cycles
automatically when the
pressure switch is in the
ON (1)/Auto position.
Always turn off air compressor
when not in use. Bleed pressure
from the air hose and unplug
from electrical outlet before
performing maintenance. All
repairs to the air compressor
should be made by an
Authorized Service person.
Never assume the air
compressor is safe to work on
just because it is not operating.
It could restart at any time!
Risk of injury from negligent
use.
Do not operate without
protective covers/guards.
Replace damaged
covers/guards before using the
air compressor.
Risk from
Negligence
Never allow children or
adolescents to operate this air
compressor!
Stay alert -- watch what you are
doing. Do not operate the air
compressor when fatigued or
under the influence of alcohol or
drugs.
Know how to stop the air
compressor. Be thoroughly
familiar with controls.
Risk of
Air Compressor Damage
Risk of major repair. Do not operate air compressor
without an air filter.
Do not operate air compressor
in a corrosive environment.
Do not incline the air
compressor transversly or
longitudinally more than 10°.
Always operate the air
compressor in a stable, secure
position to prevent air
compressor from falling.
Follow all maintenance
instructions listed in this
manual.
! SAVE THESE INSTRUCTIONS !

8
Compressor Features
1. Power Switch –On/Off
2. Quick Disconnect
3. Air Intake Filter
4. Pump/Motor Assembly
5. Safety Relief Valve
6. Air Tank Drain valve
7. Tank Pressure Gauge
8. Outlet Pressure Gauge
9. Pressure Regulator
10. 115 Volt Electric Power Cord
11. Pressure Switch
12. PC0969 only –Integrated Wheels
PC0970 only –Wheels
13. PC0969 only –Telescoping Handle

9
Compressor Features
1) Motor/Pressure Switch:This switch is used to start or stop the air
compressor. Moving the switch to the ON (1) position will provide
automatic power to the pressure switch which will allow the motor to
start when the air tank pressure is below the factory set cut-in pressure.
When in the ON (1) position, the pressure switch stops the motor
when the air tank pressure reaches the factory set cut-
out pressure. For
safety purposes, this switch also has a pressure release valve located
on the side of the switch designed to automatically release compressed
air from the air compressor pump head and its discharge line when the
air compressor reaches cut-out pressure or is shut off. This allows the
motor to restart freely. Moving the switch to the OFF (0) position will
remove power from the pressure switch and stop the air compressor.
2) Motor Thermal Overload:Motor has a protective breaker located
on the pump. Excessive amperage draw will result in the breaker
tripping to protect the motor and operator. Reset the breaker by pushing
the black plastic stem back into the housing. Reset switch if it is tripped.
3) Air Intake Filter:This filter is designed to clean air coming into the
pump. To ensure the pump continually receives a clean, cool, dry air
supply, this filter must always be clean and ventilation opening free
from obstructions. The filter can be removed for cleaning by using
warm, soapy water. Rinse the filter and air dry.
4) Air Compressor Pump:To compress air, the piston moves up and
down in the cylinder. On the downstroke, air is drawn in through the air
intake valve while the exhaust valve remains closed. On the upstroke,
air is compressed, the intake valve closes and compressed air is forced
out through the exhaust valve, into the discharge line, through the
check valve and into the air tank.
5) Safety Relief Valve:This valve is designed to prevent system
fa
ilures by relieving pressure from the system when the compressed air
reaches a predetermined level. The valve is preset by the manufacturer
and must not be modified in any way. To verify the valve is working
properly, pull on the ring. Air pressure should escape. When the ring is
released, it will reseat.
6) Air Tank Drain Valve:The drain valve is used to remove moisture
from the air tank(s) after the air compressor is shut off.
NEVER attempt
to open the drain valve when more than 0.7 bar
of air pressure is in
the air tank! To open the drain valve, turn the knob counter-clockwise.
Tilt tank to ensure that all condensation drains through valve.
7) Air Tank Pressure Gauge:The air tank pressure gauge indicates
the reserve air pressure in the air tank(s).
8) Outlet Pressure Gauge:
The outlet pressure gauge indicates the air
pressure available at the outlet side of the regulator. This pressure is
controlled by the regulator and is always less or equal to the air tank
pressure.
9) Pressure Regulator:The air pressure coming from the air tank is
controlled by the regulator knob. Turn the pressure regulation knob
clockwise to increase discharge pressure, and counter-clockwise to
decrease discharge pressure. Follow tool operating instructions for
recommended pressure range.
10) Discharge Line: Please note that the discharge line is very hot.
HOT SURFACES: Do not remove protective shroud. High
temperature after sustained use.

10
Preparation
Initial Set-Up
1. Read safety warnings before setting-up air compressor.
Location
Caution In order to avoid damaging the air compressor, do not incline the air
compressor transversely or longitudinally more than 10º.
1. Place air compressor at least 30 cm away from obstacles that may prevent proper ventilation.
Do not place air compressor in an area:
Where there is evidence of oil or gas leaks.
Where flammable gas vapors or materials may be present.
Warning
Serious injury or death may occur if electrical sparks from motor and pressure
switch come in contact with flammable vapors, combustible dust, gases or
other combustible materials. When using the air compressor for spray
painting, place the air compressor as far away f rom the work area as possible,
using extra air hoses instead of extension cords.
Where air temperatures fall below 0°C or exceed 40°C.
Where extremely dirty air or water could be drawn into the air compressor.
Electrical
Danger
Improper connection of the equipment-grounding conductor can result in a
risk of shock or electrocution. Check with a qualified electrician or service
personnel if you are in doubt as to whether the outlet is properly grounded.
Do not use any type of adapter with this product. If repair or replacement of
the cord or plug is necessary, do not connect the grounding wire to either flat
blade terminal. The wire with insulation having an outer surface that is green
with or without yellow stripes is the grounding wire.
Warning
This product must be grounded. If there should be a malfunction or
breakdown, grounding provides a path of least resistance for electric current
to reduce the risk of electric shock. This product is equipped with a cord
having an equipment grounding conductor and a grounding type plug. The
plug must be plugged into an appropriate outlet that is properly installed and
grounded in accordance with all local codes and ordinances.
1. SENCO® DOES NOT RECOMMEND THE USE OF EXTENSION CORDS as this can create power
loss and overheating of the motor. Use of an additional air hose is recommended rather than an
extension cord. If use of an extension cord is unavoidable, it should be plugged into a GFCI found in
circuit boxes or protected receptacles.
When using an extension cord, observe the following:
Cable Length
Wire Gauge
Up to 8 meters
12
AWG
Up to 30 meters
10
AWG
Up to 50 meters
8
AWG
Up to 75 meters
6
AWG
Use only extension cords having an electrical rating not less than the rating of the product. Do not use
damaged extension cords. Examine extension cord before using and replace if damaged. Do not
abuse extension cord and do not yank on any cord to disconnect. Keep cord away from heat and
sharp edges. Always shut off the air compressor switch before removing the plug from the receptacle.