Anest Iwata SLT-7.5 User manual

INSTRUCTION MANUAL
OIL-FREE SCROLL TANK MOUNT AIR
COMPRESSOR
SLT-7.5/10
SLT-7.5/10-FM
SLT-7.5/10-FRD
SLT-15D/20D
Thank you for purchasing our oil-free scroll air compressor.
●Before operation, be sure to read this instruction manual thoroughly for safe
and efficient use for a long operating lifetime.
●After reading it, store in a convenient place for immediate and future
reading.
Before use, be sure to fill in the blank spaces below for future repair and after service.
MODEL
SERIAL No.
Purchased from
Date of purchase
Date of use

1
Important information and Safety precautions
▪Important information
Read all important information and safety precautions before use. The operator shall be fully knowledgeable of
the requirements stated within this instruction manual, including important warnings, cautions and operation.
Read manual before performing any maintenance.
•Indications of warnings and cautions
WARNING
May cause injury or death.
CAUTION
May result in injury or property damage.
•Examples of warnings and cautions
May cause electric shock.
Do not touch.
Must be grounded.
＊Supplier is not responsible for any injuries or damages caused by disregard of warnings, operating
instruction specifications or maintenance schedules.
l@;
Indicates important notices you must observe.
They are helpful to achieve top performance and functions of the equipment.
Keep this booklet in an appropriate place for immediate reference.
Important

2
Important information and Safety precautions
▪Safety precautions
WARNING
Install in a safe area.
To prevent a fire or explosion, install in an area free of flammable gases or organic solvents.
Never install outdoors.
To prevent fire or electric shock, never install outdoors.
Turn off the main electric source.
To prevent electric shock or serious injury, always turn off the main electric source before
inspecting or wiring the unit.
Ask a qualified electrician.
Only a qualified electrician should perform maintenance on the unit.
Be sure to ground.
Unit must be grounded to prevent electric shock.
Never use to compress anything other than air.
Unit must only be used to compress air.
Do not use with respiratory equipment, which
could cause serious injury or death.

3
Important information and Safety precautions
WARNING
Not for use as life support.
Serious bodily injury and/or death may occur. Unit must only be used to compress air.
Do not touch.
Keep hands and fingers away from fans, pulleys and belts while the power is on.
Serious injury, including entanglement of fingers or hands can occur.
Release pressure.
Release pressure from unit before conducting maintenance and/or inspection.
Failure to do so may cause serious injury.
Conduct maintenance and inspection.
Conduct maintenance and inspection according to this manual to prevent unit failure.

4
Important information and Safety precautions
CAUTION
Use at ambient temperatures of 36°F to 104°F.
Drain will freeze at less than 36°F and will cause unit failure.
Using over 104°F will cause a shorter lifespan or unit damage.
Use in an area free of dirt and dust.
Failure to do so may result in equipment failure.
Use in an area free of corrosive gas.
Failure to do so may result in equipment failure.
Only qualified personnel should perform repairs
to prevent electric shock or fire.
Keep Away.
Keep away from the compressor while it is operating, and allow it to cool before servicing.
Failure to do so may result in serious burns and or bodily harm.
Never alter the compressor
Fire and or electric shock may occur if unit is altered and warranty will be void.
Use genuine parts
Be sure to use only genuine parts during maintenance.
Failure to do so may result in equipment failure.

5
Contents
Important information and Safety precautions
■Important information -----------------------------
1
■Safety precautions ----------------------------------
2
■Contents -----------------------------------------------
5
Before use
■Inspect the product ---------------------------------
6
Installation
■Precaution about installation -----------------------
7
■Piping ---------------------------------------------------
8
■Electrical wiring --------------------------------------
9
Operation
■Before start up ----------------------------------------
11
■Start-up and operation ---------------------------------
11
Maintenance
■Standard maintenance period ------------------------
13
■How to carry out maintenance -----------------------
15
Troubleshooting Guide
■Compressor ------------------------------------------------
16
■Auto drainer -----------------------------------------------
16
Specifications
■Compressor specifications -----------------------------
17
Appendix
■Outer dimensions ----------------------------------------
19
■Circuit diagram --------------------------------------------
23
Warranty
■Warranty and remain -----------------------------------
25

6
Before use
▪Inspect the product
•Inspect the product to be sure you have the model you ordered.
•Check that there is no deformity or damage which occurred during transportation. Any shipping damage must be
immediately filed with the freight carrier.
•Check that the following accessories are included.
oCompressor instruction manual
oPump instruction manual
oAuto drainer instruction manual
oMembrane dryer instruction manual (-FM unit)
oRefrigerated dryer instruction manual (-FRD unit)
o4 rubber mats
oWiring schematic

7
Installation
▪Precautions about installation
WARNING!
Do not use in an area which is exposed to rain, steam or high humidity.
High humidity can cause electric shock or fire.
Do not install in an area with corrosive gas (ammonia, acid, salinity, ozone gas and sulfur dioxide)
preventing a shorter lifespan of the unit.
WARNING!
To prevent a fire or explosion, install in an area free of flammable gases or organic solvents.
Ambient temperature
Use at ambient temperatures of 36°F to 104°F.
Using at less than 36°F will cause unit failure or freezing.
CAUTION!
Install this product on a level floor to prevent vibration and noise, causing damage to the unit.
CAUTION!
Install in an area which is free of dust. Dust can cause increased temperature and wear,
resulting in a shorter lifespan and/or unit failure.

8
Installation
▪Precautions about installation (Continue)
•Installation space
Secure the space around the compressor for safe inspection and maintenance.
Installation space
(inch)
Above
24
Other Sides
20
•Ventilation
When using in an enclosed closed room, install a fan for ventilation.
Model
British Thermal Unit
(BTU)
SLT-7.5/SLT-7.5-FM
19,200
SLT-7.5-FRD
20,260
SLT-10/SLT-10-FM
25,600
SLT-10-FRD
26,660
SLT-15D
38,400
SLT-20D
51,200
▪Piping
•Do not use a steel pipe or smaller size than the compressor outlet connection.
•Use the high pressure and heat resistant rubber hose.
(Pressure resistance; 200psi or more, Heat resistance; 194 °F or more)
•Connect the auto drain as an accessory to the drain plumbing underneath the tank.
•When there is a riser in the piping, be sure to install a drain collector or drain valve.

9
Installation
▪Electrical wiring
•Precautions about wiring
Turn off main electric source.
Be sure to turn off main electric source before inspection or wiring job.
If not, it can cause electric shock or serious bodily injury.
Ask qualified electrician.
Ask qualified electrician to perform electric wiring job.
If not, it can cause electric shock or fire.
Be careful about wiring.
Do not use cable of less than designated size.
If done, overheat of cable can cause fire.
Be sure to ground.
Be sure to do the grounding on the wiring job.
If not, it can cause electric shock or fire.

10
Installation
•Wiring
Be sure to use the fork, pin or blade terminal to firmly connect the electric source to the designated place of the magnetic
switch or terminal in the control box. Please refer to the circuit diagram shown in the Appendix.
o208V-230V/460V, 3PH, 60Hz
Motor
Size
(HP)
Power
(V/PH)
Motor
Load
(FLA)
Non-time
Delay Fuse
(A)
Time Delay
Fuse
(A)
Inverse-time
circuit
breaker
(A)
7.5
208/3
24.2
70
45
70
230/3
22.0
60
40
60
460/3
11.0
30
20
30
10
208/3
30.8
80
60
80
230/3
28.0
70
50
70
460/3
14.0
35
25
35
15 (7.5 x 2)
208/3
24.2 x 2
125
90
125
230/3
22.0 x 2
110
80
110
460/3
11.0 x 2
60
40
60
20 (10 x 2)
208/3
30.8 x 2
175
110
175
230/3
28.0 x 2
150
100
150
460/3
14.0 x 2
70
50
70
oAuto drainer
Connect the power cable with a plug to the outlet shown below.
Supply voltage; 230 / 115 / 24 / …VAC / 24 VDC ± 10%, 50 - 60 Hz
oRefrigerated Dryer (FRD only)
Connect the power cable with a plug to the outlet as below.
Supply voltage; 115 VAC (voltage fluctuation ±10%), 60 Hz

11
Operation
▪Before start up:
•Make sure all safety warning labels and instructions have been read and understood before continuing.
•Make sure any shipping materials and brackets are removed.
•Be sure the electric power source has been firmly connected and grounded.
•Make sure all pressure connections are tight.
•Confirm all safety relief valves are correctly installed.
•Check that all fuses and circuit breakers are the proper size.
•Make sure the inlet filter is correctly installed.
•Inspect the drain valve to be sure it is closed.
▪Start-up and operation:
•Turn the electric source breaker on.
•Be sure the auto drainer is energized.
•Turn the pressure switch or both pressure switches on. (SLT-15D/20D) DO NOT turn both switches on at same time.
•Open the discharge valve completely.
•Confirm the compressor operates without excessive vibration, unusual noises or leaks.
•Close the discharge valve completely.
•If the pressure does not rise on a three phase unit, stop the unit and turn the electric source breaker off.
Switch the L1 and L2 connections inside the control box.
CAUTION!
If the pressure does not increase and an abnormal sound is heard during reverse rotation,
turn the pressure switch and the main electric source breakers off. Switch the L1 and L2
connections inside the control box.

12
Operation
•Check the discharge pressure. Be sure the compressor stops at the setting pressure indicated below.
Model
Cut-out pressure (psi)
SLT-7.5
SLT-10
SLT-7.5-FM
SLT-10-FM
115
SLT-15D
SLT-20D
Lead pump
115
Second pump
105
•Check the discharge pressure. Be sure the compressor starts at the setting pressure indicated below.
Model
Cut-in pressure (psi)
SLT-7.5
SLT-10
SLT-7.5-FM
SLT-10-FM
85
SLT-15D
SLT-20D
Lead pump
85
Second pump
75

13
Maintenance
The following maintenance is required at specific intervals. These intervals are based on conditions where the ambient
temperature is around 86°F. If your location is warmer or running condition is more severe, maintain within a shorter period.
During warmer conditions, shorten the period approximately 30% from our recommendation at every 9°F.
Standard maintenance period is not our warranty period.
▪Standard maintenance period
•For 115psi models (SLT-7.5, SLT-10, SLT-15D and SLT-20D)
Maintenance is to be done according to operating hours, or period, whichever comes first.
Item
Details
Maintenance period (every hours or periods)
Remark
Daily
Every
400
Every
2 months
Every
2,000
yearly
Every
4,000
Every
2 years
Every
8,000
Every
4 years
Every
16,000
Every
8 years
Every
24,000
Every
12 years
Drain (Option)
Air receiver
○
○☆
Change as
necessary
Noise, vibration
Check
○
Air intake filter
Clean
○
●
Whenever it is
dirty
Safety valve
Check function
○
V belt
Tension/replace
○
initial
only
○
●☆
No slack or
loose
Pressure gauge
Check
○
Magnetic switch
Check or replace
○☆
●☆
Motor, insulation
Check resistance
○☆
Change as
necessary
Motor
Check/replace
●☆
Pulley
Check
○☆
Change as
necessary
Pressure switch
Check function
○☆
Change as
necessary
After cooler
Clean
○☆
Change as
necessary
O rings
Replace
●☆
Use genuine
Parts
Check valve
Check function
●☆
Change as
necessary
Air end fan
FS-OS fin
Clean
○☆
Whenever it is
Dirty
Tip & dust seals
Grease up
Replace
●☆
Use genuine
Grease
Air end
●☆
○ Inspect ● Replace ☆Consult with distributor who sold it to you
＊Air intake filters are not covered under the warranty. You may want to keep extra filters on hand.
•Replace the mainline filter, final filter and membrane dryer. (-FM*).
The mainline filter and final filters need to be replaced once every two years.
The membrane dryer needs to be replaced once a year.

14
Maintenance
▪Dryer maintenance period
•A; SLT-7.5-FRD and SLT-10-FRD
Maintenance is to be done according to operating hours or period whichever comes first.
Item
Details
Maintenance period (every hours or periods)
Remarks
Daily
Every
400
/1
month
Every
3
months
Every
2,500
/6
months
Every
5,000
/1 year
Every
7,500
/1.5
years
Every
10,000
/2 years
Every
20,000
/4
years
Display of
dryer
Check
abnormalities
○
Refrigerating
Compressor
Must not have
abnormal sound,
smoke or smell
○
Must not leak oil

Ventilation
grille
Clean out dust and
foreign particles
○
Condenser
Clean dirt and dust
attached to the fin

Each time dirt
accumulates
greatly
Must not have oil
leakage

Must not have
corrosion

Fan Motor
Check/replace
●☆
Pipe
Check resistance
○☆
Auto drain
strainer
Clean/replace
○
Use neutral
detergent for
cleaning.
Replace if
operating
failure
continues after
cleaning
○Inspect ●Replace ☆Consult with distributor who sold it to you
＊Air intake filter is a wear part, and it is not free of charge even during warranty period. We suggest you keep it on hand.
▪The mark is to implement certainly as items of legal inspection decided to be “the law related to proper control
and rationalization of fluorocarbons use”. Inspect with eyes. Record and keep the results of maintenance until
disposal and transfer of the product. Request repairing promptly when oil leakage is discovered from refrigerating
compressor. Repairing request inform authorized distributor by ANEST IWATA Air Engineering, Inc.
•Replace the mainline filter, final filter and membrane dryer. (-FRD).
The mainline filter and final filters need to be replaced once every two years.

15
Maintenance
▪How to carry out maintenance:
•Intake filter
Blow dust off the filter with an air gun and replace if it is dirty.
•Safety valve
Lift up the stem of the safety valve at around maximum pressure and check to see if air blows out.
•Belt tension
If the V belt makes a slipping sound at the startup, due to decrease of V belt tension, readjust the belt tension or replace it.
If belt tension is less than the figure in the chart below, adjust belt tension again.
An exclusive tool is necessary to measure belt tension.
Ask our distributor to readjust belt tension when needed.
Model
Readjustment
standard load / Hz
Readjustment
target load / Hz
Tolerance ±5
Replacement new belt
target load / Hz
Tolerance ±5
SLT-7.5
SLT-7.5-FM
SLT-15D
65
76
84
SLT-10
SLT-10-FM
SLT-20D
70
82
90

16
Troubleshooting Guide
If you have any problems, please refer to the chart below.
If the (*) marked items are difficult for you to fix, please contact the shop you purchased it from.
▪Compressor
Problem
Cause
Corrective action
Compressor unit does
not start
Electric source is not ON.
Turn on electric source
Electric source is not connected
correctly.
Connect it correctly
Pressure switch is in OPEN position
Reduce pressure in air receiver
Power is at supply
connection and
compressor does not
start
Over load relay has tripped
See last entry of Troubleshooting guide
Wrong or low voltage
Inspect incoming power supply and unit
power rating.
Starter has failed
Inspect, repair or replace contactor
assembly *
Pressure switch has failed
Inspect, repair or replace pressure switch
assembly *
Motor has failed
Inspect, repair or replace motor *
Compressor is running
but will not make
pressure
Drive belts came off or too loose
Inspect, tighten or replace drive belts *
Clogged intake filter element
Clean or replace intake filter element
Discharge air is leaking
Inspect and repair
Pump has failed
Inspect, repair or replace pump *
Pump running in the wrong direction
Correct power connections
Excessive noise or
vibration
Drive belt has flipped or slipped
Inspect, repair or replace drive belt *
Motor has failed
Inspect, repair or replace motor*
Pump has failed
Inspect, repair or replace pump
Compressor running
hot
Ambient temperature is high
Be sure not to exceed above 104°F
Pump running at high pressure
Check tank pressure and pump outlet are
not obstructed
After cooler fins clogged
Clean after cooler
Clogged intake filter element
Clean or replace intake filter element
Compressor turns
on/off rapidly
Receiver tank has high level of water
Drain condensation
Check valve has failed
Inspect, repair or replace check valve *
Pressure switch has failed
Inspect, repair or replace pressure switch *
Safety valve blows off
Motor starter contacts welded shut
Inspect, repair or replace motor starter *
Pressure switch has failed
Inspect, repair or replace pressure switch *
Motor overload has
tripped
Pump has failed
Inspect, repair or replace pump *
Motor has failed
Inspect, repair or replace motor*
Improper wiring
Inspect and rewire *
Wrong overload setting
Check setting of overload relay *
Low voltage
Check incoming power supply
▪Auto drainer
If there are any problems occurring in the auto drainer, please read the enclosed manual for the auto drainer
BEKOMAT31.
▪Refrigerated Air Dryer (option)
In case of any problem is occurred in the refrigerated dryer, please read the enclosed manual for the Refrigerated Air Dryer.

17
Specifications
▪Compressor specifications
•7.5 / 10HP
Item
SLT-7.5-80
SLT-10-80
Operating pressure
psi
85 - 115
Air delivery (*1)
cfm
22.6
29.7
Tank size
GAL
80
Noise level (*2)
dB(A)
74
75
Air outlet
NPT 3/4”
Operating voltage
3Phase, 208-230/460V, 60Hz
Dimensions (L×W×H) (*3)
In.
64 x 29 x 48
64 x 29 x 49
Approx. mass
Lbs.
550
580
*1. Air delivery means average discharge air volume at the maximum operating pressure, converted into
atmospheric pressure. It is not a warranted figure.
*2. Noise level is measured in an anechoic room.
*3. Dimensions are outer dimensions, excluding extruding parts.
Item
SLT-7.5-FM-80
SLT-10-FM-80
Operating pressure
psi
85 - 115
Air delivery (*1)
cfm
19.8
26.9
Tank size
GAL
80
Noise level (*2)
dB(A)
74
75
Air outlet
NPT 3/4”
Operating voltage
3Phase, 208-230/460V, 60Hz
Dimensions (L×W×H) (*3)
In.
64 x 33 x 48
64 x 33 x 49
Approx. mass
Lbs.
565
595
*1. Air delivery means average discharge air volume at the maximum operating pressure converted into
atmospheric pressure. It is not a warranted figure.
*2. Noise level is measured in an anechoic room.
*3. Dimensions are outer dimensions excluding extruding parts.
*4. Main-line filter (AM450C-N06D)
Nominal filtration rating: 0.3μm [Filtration efficiency: 99.9%]
Oil mist density at outlet: Max. 1.0 mg/m^3 (ANR) [≒0.8ppm]
Filter element: AM-EL450
*5. Membrane dryer (115psi; DM20-53CA-N; including filter, 0.01μm)
This is designed for approximately 44 / 55°F as a dew point and approximately 19.8 / 26.9 cfm as a final
discharge flow. If more information is needed, please refer to the instruction manual for the membrane dryer
that is enclosed.

18
Specifications
•7.5 / 10HP with Refrigerated Dryer
Item
SLT-7.5-FRD
SLT-10-FRD
Operating pressure
psi
85-115
Air delivery (*1)
cfm
22.6
30.0
Tank size
GAL
80
Noise level (*2)
dB(A)
74
75
Air outlet
1/2” NPT
Operating voltage
3Phase, 208-230/460V, 60Hz
Dimensions (L×W×H) (*3)
In.
75 x 39 x 49
Approx. mass
Lbs.
849
879
1. Air delivery means average discharge air volume at the Maximum operating pressure converted into
atmospheric pressure. It is not a warranted figure.
*2. Noise level is measured in an anechoic room.
*3. Dimensions are outer dimensions excluding extruding parts.
*4. Mainline filter (AM350C-N04D)
Nominal filtration rating: 0.3μm [Filtration efficiency: 99.9%]
Oil mist density at outlet: Max. 1.0 mg/m^3 (ANR) [≒0.8ppm]
*5. Final filter (AMD350C-N04D)
Nominal filtration rating: 0.01μm [Filtration efficiency: 99.9%]
Oil mist density at outlet: Max. 0.1 mg/m^3 (ANR) [≒0.8ppm]
*6. Refrigerated dryer
This is designed for approximately 55 degree F as a dew point at Maximum operating pressure. It is not a
warranted figure. If more information is needed, please refer to the instruction manual that is enclosed.
•15 / 20HP
Item
SLT-15D-120
SLT-20D-120
Operating pressure
psi
85 - 115 (Lead pump)
75 - 105 (Second pump)
Air delivery (*1)
cfm
45.2
59.4
Tank size
GAL
120
Noise level (*2)
dB(A)
78
79
Air outlet
NPT 1”
Operating voltage
3Phase, 208-230/460V, 60Hz
Dimensions (L×W×H) (*3)
In.
68 x 37 x 52
68 x 37 x 53
Approx. mass
Lbs.
1010
1080
*1. Air delivery means average discharge air volume at the maximum operating pressure, converted into
atmospheric pressure. It is not a warranted figure.
*2. Noise level is measured in an anechoic room.
*3. Dimensions are outer dimensions, excluding extruding parts.

19
Appendix
▪Outer dimensions
•SLT-7.5-80
•SLT-10-80