SIP TN1.5/25O User manual

Manual
Direct Drive
Compressors

2
Table of Contents
Page
Introduction / Warranty 3
Standard Components 4
Compressor Layout 5
Setting up 6
Maintenance 8
Safety 10
Fault Analysis 11
Environment 16

3
Introduction / Warranty
FOR YOUR SAFETY AND THE SAFETY OF OTHERS ALWAYS
READ FULLY THESE INSTRUCTIONS BEFORE OPERATING THIS
COMPRESSOR
Introduction
Congratulations on the purchase of your SIP direct drive compressor. These
compressors have been designed and manufactured to the highest standards and
has been tested according to European Standards for a safe and trouble free
operation.
Warranty
This Compressor is guaranteed against manufacturing defects for a period of 12
months from the date of purchase. Unless otherwise stated.
In order to give a satisfactory service the compressor MUST be correctly
assembled, installed, maintained and used. The warranty against manufacturing
defects depends on the user ensuring that the correct procedures are followed.
Always…
Ensure the correct power supplies are used. If the compressor is fitted with a 13A
3-pin plug, then it may be used on any domestic supply. See ‘Setting up’ on page
6
Inspect the compressor regularly and replace wearing parts and consumables as
necessary. See ‘Maintenance’ on page 8
This warranty does not cover items, which are considered to be consumable, i.e.
Air intake filters, or items worn through general wear and tear. Nor defects caused
by incorrect assembly, installation, maintenance or use.
ALL WARRANTY CLAIMS MUST BE ACCOMPANIED WITH RECIEPT OF
PURCHASE
This manual and air receiver test certificate must be kept in a safe place and
offered to everyone called to inspect, maintain or install your machine.

4
Standard Components
1. MOTOR/PUMP UNIT: Provides the power and compresses air to the desired
pressure.
2.* RECEIVER: Air storage providing pulsation free air on demand.
3.*PRESSURE SWITCH: Monitors the air pressure in the receiver and starts and
stops the compressor automatically according to pressure level. Also acts as the
compressor on/off switch.
4.*RECEIVER PRESSURE GAUGE: Indicates Air pressure in the receiver.
5. OUTLET PRESSURE GAUGE: Indicates air pressure being used/ delivered down
the airline.
6. AIR OUTLET VALVE: Some models have more than one outlet valve and can be
regulated or unregulated.
7.* REGULATOR: Enables air pressure to be regulated to the outlet valve.
8. NON-RETURN VALVE: Prevents the air pressure stored in the receiver from
returning back to the pump unit.
9.* BLEED PIPE: When the pressure switch turns off the motor any
back pressure in the delivery pipe and pump unit is exhausted down this bleed pipe.
10.* DELIVERY PIPE: Delivers the compressed air from the pump to the
receiver.
11. SAFETY VALVE: In the event of excessive pressure build up this valve will
release the excess pressure to the atmosphere.
12. AIR INTAKE FILTER: Filters the intake of air to protect the pump unit from
damage of air born debris. On some models the filter in integrated into the pumps
head.
13. DRAIN VALVE: Allows the draining of moisture build up inside the air receiver.
This is a manual operation and must be done daily.
14.* WHEELS: For portability.
15.* RUBBER FEET: To reduce vibration.
16.* OIL DIP STICK: To measure oil level also fill port for oil. Not on oil free models
• Items marked with asterisks indicate that some compressors may not
have this component.

5
Compressor Layout

6
Setting Up
Your compressor arrives assembled and works tested, ready for installation and
connection to your mains supply. On some models wheel mounting kits are
supplied, follow the instructions supplied with the wheel kit.
FOUNDATIONS: Direct Drive air compressors are supplied either with rubber feet
or wheel mounted. The feet and wheel absorb vibration; the compressor must not
be fixed rigidly to the floor and should be positioned on firm level ground.
SITING AND VENTILATION: Good access and headroom should be provided
around the compressor for servicing. Adequate protection from the weather must
also be provided. Good ventilation is vital, for maximum efficiency. Intake air
should be as clean as possible. Air impurities, abrasive dust and corrosive gases
are particularly harmful to the compressor.
MAINS CONNECTION: The compressor should be located as close to the mains
supply as possible. Check that this supply is the same voltage as marked on the
motor rating plate and that the wiring conforms in all respects to local regulations.
VOLTAGE DROP:
If the compressor is moved a long way from the mains supply, the motor may
appear to be sluggish, slow, buzz or unable to start. This is due to VOLTAGE
DROP caused by the extended lead to the compressor. This can be prevented,
by increasing the size of the cable. Incorrect voltage at the motor will invalidate
any guarantee.
BEFORE STARTING CHECK:
That the compressor is correctly installed and that the supply voltage is correct
and all fuses are correctly rated and intact. Also, that all maintenance checks
have been carried out and the contents of this manual have been read and fully
understood, by all appropriate persons.
PRESSURE SWITCH STARTER BUTTON:
Most machines are fitted with a black pressure switch combining a STOP/START
button on the top. In the 'UP' position the motor will start, in the 'DOWN' position
the motor will stop and the switch will bleed the pump head. If it is necessary to
stop the machine before the normal cut - out pressure is reached this button
should be depressed to stop it. NB: Some models may have a rotary switch
instead of a push button.
The Tn1.5/25-O models have a red rocker switch this if for STOP/START an
internal port performs the bleed function.

7
AUTOMATIC RUNNING: Once started your compressor stops and starts
automatically. This is controlled by the pressure switch which is preset at the
factory to stop the motor when the pressure in the tank reaches it's maximum
working pressure and to automatically restart the motor when the pressure in the
tank decreases to a predetermined pressure (about 35psi below maximum
working pressure). If for some reason you want to stop the compressor, and
immediately start again, the compressed air above the piston must be bled, to
unload the compressor on start up (see STARTING section above).
PRESSURE REGULATION: Your compressor may be fitted with a pressure
regulator or combined air filter and pressure regulator. Simply turn the pressure
control knob to adjust the outgoing pressure, clockwise to increase the pressure
and anticlockwise to reduce it, the outlet pressure is shown on the regulator
gauge.

8
Maintenance
Cleanliness.
Always keep your compressor clean internally and externally. For oil lubricated
models change the oil regularly and keep all external surfaces clean. A clean
inside leads to good mechanical efficiency, a clean outside means better
dissipation of heat to the circulating air.
Pressure switch unloader valve. (not on fitted on all models)
On most pressure switches (usually black in colour) there is either a button or
rotary switch, which is used to turn the compressor on and off. This switch also
activates the unloader valve to relief pressure in the delivery pipe and cylinder
head to allow the motor to restart off load. Depress this button or turn the rotary
switch from time to time to ensure that the valve is working properly and
exhausting the air.
Suction Action (only on models with external air filters)
Gently place your hand over the air inlet filter, the change in inlet suction noise
should be heard. Poor suction would suggest a block air filter or damaged valves.
Also causing excessive load onto the motor.
Spare part lists and exploded drawings are available from your local distributors
or by calling the SIP technical support desk.
All warranty claims must be accompanied by proof of purchase.

9
Scheduled Maintenance
Regular maintenance will ensure maximum efficiency for the longest period.
DAILY
0il - check the crankcase oil level, and top up with oil if required. Use SIP
compressor oil. Investigate high oil consumption; this indicates a possible pump
problem.
If your compressor is not used daily, check crankcase oil level before starting up.
The initial oil should be drained after 50 hours running or 1 week and thereafter
every 500 hours or (4 months) whichever is sooner.
Water - should be drained from the air receiver by means of the drain valve
located underneath the receiver. Simply unscrew the knurled ring to release the
water, and re-tighten finger tight. Failure to drain the air receiver will invalidate the
receiver warranty.
Leaks - check for leaks from the compressor, fittings, delivery lines and couplings
re-tighten or re-seal as necessary. Remember, even small leaks can cause
significant wastage of compressed air costing you both for extra energy used and
reduced compressor life.
Cylinder head bolts (not oil free models) - these should be checked and re-
tightened with a torque wrench to 10Nm after the first days running, after 50
hours, and thereafter every 500 hours or four months, whichever is the sooner.
The cylinder head needs to be completely cold before carrying out this operation.
Ai Filter (external filter models) - check and clean by reverse blowing with
compressed air, if badly contaminated, replace the cartridge.
WEEKLY OR AFTER 50 HOURS RUNNING (WHICHEVER SOONER)
Pressure Switch - observe that the compressor is cutting out at the correct
maximum pressure, and back in approximately 35psi lower. If adjustment is
necessary contact SIP for guidance.
Safety Valve - this is set to protect in case of pressure switch malfunction. With
the receiver pressure at maximum, the centre shaft can be lifted with ease to
check its function. Wear eye and ear protection during this check.

1
0
Safety
DO NOT:
1. Use compressed air for cleaning clothing.
2. Apply compressed air directly onto the skin
3. Use compressed air for breathing apparatus or charging breathing air
cylinders, unless the air has been filtered using filters designed
specifically for this purpose.
4. Use an open-air line, this will cause ‘whip’ and could cause injury.
5. Use flammable liquids to clean the compressor.
6. Use naked flames to inspect the interior of the compressor or pressure
vessel.
7. Allow children or inexperienced people to operate or go near the
compressor.
8. Touch the air compressor with wet hands.
9. Move the compressor when in operation.
10. Move the compressor in any other method than the way in which it has
been designed.
DO:
1. Use eye protection when using compressed air to clean equipment.
2. Ensure dirt is not blown towards other people; always use a blow gun for
cleaning.
3. Ensure all ancillary equipment is in good condition and correctly rated for
the job.
4. Check regularly that covers and guards are secure and in position.
5. Fit a non-return valve or shut off valve in the delivery line if the
compressor is to be coupled in parallel with another compressor or
connected to an airline system.
6. Ensure that all pipe work and hoses connected to the compressor are the
correct size and suitable for the working pressure. Also in good condition.
7. Switch of the compressor and isolate from the mains supply and
discharge any stored air from the receiver or airline system, before
carrying out maintenance.
8. Install the compressor so that an adequate supply of cooling air can
circulate around the pump unit, and that air passage through the cover
and motor fan inlets is not restricted.
9. Ensure all safety rules and regulations are complied with, in all aspects
applicable to the working environment in which the compressor operates.
10. Always read the manual fully before operating this equipment.

11
Fault Analysis
FAULT SYMTOMS Possible Cause
Pumping Oil 1, 6, 8, 10, 18, 19
Knocks and Rattles 14, 15, 16, 17
Reduced air delivery 1, 4, 15, 18, 19
Motor tripping out or drawing excess current 7, 12, 13, 15, 17, 19, 23
Rusting Cylinders 10,11
Excessive stopping and starting 2,4,5
Compressor running very hot 3,5,9,15
Compressor not coming up to speed 12,21,27
Lights flicker when compressor runs 12,13
Abnormal piston, ring or cylinder wear 6,9,10, 20
Motor will not run 12,13,21,22,23,24
FAULT CHART
1. Clogged air intake filter.
2. Receiver needs draining.
3. Fan blocked or obstructed.
4. Air leaks in pipe work on or off compressor.
5. Receiver safety valve leaking.
6. Oil viscosity too low.
7. Oil Viscosity too high.
8. Oil Level too high.
9. Oil level too low.
10. Incorrect oil being used. Try SIP Compressor oil.
11. Extremely light duty use, or located in damp environment.
12. Check for good connections and voltages at motor terminals and starter box.
13. Poor power regulation.
14. Carbon on top of piston.
15. Leaking, broken, carbonised or loose valves or restricted airways.
16. Worn or scored connecting rod bearings.
17. Loose motor fan, defective bearings on crankshaft.
18. Broken piston rings.
19. Cylinders scratched or worn.
20. Dusty atmosphere, dirty inlet filter.
21. Faulty motor capacitors
22. Faulty pressure switch.
23. Faulty non-return valve.
24. Overload tripped.

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TN1.5/25O diagram