Granit FL User manual

AIR COMPRESSOR
instruction manual
please read these instructions carefully before use
KOMPRESSOR
Bedienungsanleitung
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COMPRESSOR
Gebruiksaanwijzing
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COMPRESSEUR
Manuel d‘utilisation
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Instrukcja obsługi
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English
Content
1) Description
2) Main components
3) Technical specifications
4) Preperations before regular use
5) Operating and adjusting the compressor
6) Safety instructions
7) Maintenance
8) Trouble shooting
9) Detailed parts list and illustration
10) Scope of delivery
1. Description
Due to its new design and excellent workmanship this lightweight and low-noise air compressor has the benefits of a compact
construction, high safety, operating ease and a fine appearance. The compressor can be used in almost every branch of industry, for
spraypainting, in automatic control systems and other fields where compressed air is required.
2. Main components (fig. 1)
1) Main compressor
2) Pressure switch
3) Outlet valve
4) Regulating valve
5) Pressure gauge
6) One-way valve
7) Drain
8) Wheel
9) Discharge pipe
10) Air tank
11) Safety valve
12) Fan cover
fig. 1

fig. 2
fig. 3
3. Technical specifications
Data
Model FL
Power 1 kW (1.4 hp) & 1.5 kW (2 hp) & 1.8 kW (2.4 hp)
Voltage (V) 100 / 110 220 / 230 / 240 220
Frequency (Hz) 60 50 60 60
Current (A) 15 7.5 7.5 5.5
Motor poles 2P 2P 2P 4P
Max. rpm 3450 2850 2850 1750
Theoretical discharge (cfm) 7.3
Autostop pressure 115 PSI (0.8 MPa)
Autostart pressure 70 PSI (0.5 MPa)
Tank capacity (l) 24 25 30 50
Dimensions (cm) 60 x 29 x 64,5 62 x 36 x 64 65 x 36 x 64 77x 33 x 73
Air outlet connection 1/4"
Net weight (kg) 27 28 30 38
4. Preperations before regular use
1) The surroundings of the compressor should be clean, dry and well ventilated.
2) Keep the voltage steady and prevent it from varying more than 5% while in use.
3) Keep the oil level within the red circle.
4) Recommended compressor oil:
Use SAE30 or L - DAB100 with temperatures > 10°C
Use SAE10 or L - DAB68 with temperatures < 10°C
5) Open the outlet valve before starting for the first time. Turn the pressure switch to
„on“ (fig. 2). Let the compressor run for 10 minutes without load to make sure that
all moving parts are lubricated before regular use.
5. Operating and adjusting the compressor
1) In normal use the compressor is controlled by a pressure switch. Once the rated (maximum) operating pressure has been achieved
the motor will automatically shut down, starting again when reaching a predifined lower pressure. As soon as the motor switches off,
the compressed air inside the discharge pipe should be released through the release valve positioned beneath the switch, otherwise
the motor could be damaged after restarting. The rated pressure can be adjusted by turning the adjusting bolt. Do not change it
without a proper reason (fig. 3).
2) The output pressure can be regulated with the adjusting valve. Pull up the knob and turn it clockwise or counterclockwise to increase
or decrease the output pressure (fig. 3).
3) When the compressor needs to be shut down, simply put the pressure switch in the „off“ position.

6. Safety instructions
1) Remove the cover, put on the breath pipe and install the air filter before starting the compressor for the first time (fig. 4).
2) Never loosen any parts of the compressor while there is pressure on
the air tank.
3) Never disassemble any electrical parts before disconnecting the plug.
4) Never adjust the safetyvalve carelessly.
5) Never use the compressor with a higher or lower voltage than prescribed.
6) Never unplug to shut down the compressor, turn the pressure switch to
„off“ instead.
7) If the release valve does not work after the motor stopped, immediatly
find the cause and fix the problem. Otherwise the motor could be
damaged on restart.
8) Refreshed lubricating oil must be clean. Oil level is to be kept within
the red circle on the indicator.
9) Disconnect the plug after turning the switch to „off“ in order to
completely cut power supply.
7. Maintenance
1) Clean the crankcase and renew lubricating oil after the first 10 working hours.
2) Check the oil level after every 20 working hours. Refill if necessary.
3) Open drain underneath the tank in order to undo it from condensation every 60 working hours.
4) Clean crankcase, renew oil, clean air filter and check safety valve and pressure gauge every 120 working hours.
8. Trouble shooting
Fault Probable cause Remedy
Motor cannot be started,
is running too slow or is
getting too hot
1) Insufficient voltage, fault in circuit
2) Power cable to thin or too long
3) Fault in pressure switch
4) Motor malfunction
5) Sticking of main compressor
1) Check electrical circuit
2) Replace wire
3) Repair or replace switch
4) Repair or replace motor
5) Check and repair
Sticking of main compressor 1) Moving parts are burnt due to a lack of oil
2) Moving parts damaged or stuck by foreign object
Check crankshaft, bearing, connecting
rod, piston, piston ring etc. and replace
if necessary.
Strong vibrations or
abnormal noise
1) Connecting part loosened
2) Foreign object got stuck in main compressor
3) Piston knocking on valve seat
4) Other moving parts seriously damaged
1) Check and retighten loosened part
2) Check and remove part
3) Replace with thicker paper gasket
4) Repair and replace
Insufficient pressure or
decreased discharge capacity
1) Motor running too slow
2) Air filter choked up
3) Leakage of safety valve
4) Leakage of discharge pipe
5) Sealing gasket damaged
6) Valve plate damaged, carbon build-up
7) Piston ring and cylinder worn or damaged
1) Check and repair
2) Clean or replace the cartridge
3) Check and adjust valve
4) Check and repair
5) Check and replace
6) Replace and clean
7) Repair or replace
Excessive oil consumption
1) Oil level too high
2) Breath pipe choked up
3) Piston ring and cylinder worn or damaged
1) Keep level within marked range
2) Check and clean
3) Repair or replace
fig. 4

9. Detailed parts list and illustration