Gast JUN-AIR 106R-25B User manual

Part No. 6190770 (Rev B)
Basic Systems
106R-25B, 106R-25BQ2,
2x106R-40B
6190770 | REV B
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2
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Table of Contents
Operating Manual ................................................................................................. 4
Technical Specifications ........................................................................................... 7
Performance Cuves ............................................................................................... 8
Basic System Kits .................................................................................................15
Feature Diagrams .................................................................................................16
Symbols ..........................................................................................................21

3
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
SAFETY
Important - read this first!
Please read the following information and operating instructions
included with this product before use. This information is for your
safety and it is important that you follow these instructions. It will
also help prevent damage to the product. Failure to operate the unit
in accordance with the instructions or using JUN-AIR unauthorized
spare parts can cause damage to the unit and could cause serious
injury.
CAUTION: To reduce risk of electric shock
• Only authorized service agents should carry out service.
Removing parts or attempting repairs can create an electric
shock. Refer all servicing to qualified service agents.
• If this unit is supplied with a three-pin plug, connect with a
properly grounded outlet only.
WARNING: To reduce risk of electrocution
• Do not use this unit with electrical voltages other than stated
on the rating plate.
• Always unplug this unit immediately after use and store in a dry
place.
• Do not use this product in or near liquid or where it can fall or
be pulled into water or other liquids.
• Do not reach for this product if it has fallen into liquid. Unplug
immediately.
• This unit is not weatherproof. Never operate outdoors in the
rain or in a wet area.
DANGER: To reduce risk of explosion or fire
• During spraying with combustible liquids, risk of explosion may
arise, particularly in closed rooms.
• Do not use this product in or near explosive atmospheres or
where aerosol products are being used.
• Do not pump any other gases other than atmospheric air.
• Do not pump combustible liquids or vapors with this product;
do not use it in or near areas with combustible or explosive
liquids or vapors.
• Do not use this unit near open flames.
CAUTION: To prevent injury
• Compressed air can be dangerous; do not direct airflow at
a person’s head or body.
• Always keep the system out of reach of children.
• Never operate this product if it has a damaged power lead or
plug, if it has been dropped or damaged, or if it has fallen into
water. Return the product to a service center for examination
and repair.
• Keep the electrical cable away from hot surfaces.
• Ensure all openings are kept free of restriction and never
restart when the unit cools and the overload resets.
Never place the system on a soft surface where
the openings may be blocked. Keep all openings free from
dust, dirt and other particles.
• Never leave this product unattended when plugged in.
• Never insert fingers or any other objects into fans.
• This unit is thermally protected and can automatically restart
when the overload resets.
• Wear safety glasses, when servicing this product.
• Use only in well ventilated areas.
• This product may only be connected to units or tools with a
max. pressure rating higher or equal to that of the compressor.
• The surface of the compressor can get hot. Do not touch
compressor motor during operation.
Failure to observe the safety precautions could result in severe
bodily injury, including death in extreme cases.
IMPORTANT: General directions for use
• Protect compressor against rain, moisture, frost and dust.
• The compressor is constructed and approved for a max.
pressure as stated under Technical Specifications.
• Do not operate the compressor at ambient temperatures
exceeding 40°C/104°F or falling below 0°C/32°F.
• If the supply power lead on the compressor is defective, an
authorized Jun-Air distributor or other qualified personnel
must carry out the repair.

4
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
OPERATION
• If the compressor has been stored at an extremely low
temperature, allow it to heat to room temperature before
switching it on.
• If the compressor is supplied with a receiver, connect equipment
and open the filter regulator on the receiver.
• Turn on the compressor on the pressure switch.
• The compressor will automatically stop when the preset cut-out
pressure is reached.
• If the compressor does not start, there might be pressure in
the receiver. The compressor will automatically start when the
pressure drops.
• The cut-in and cut-out pressure is preset from the factory and
it is normally not necessary to change this. However, if it is
necessary to change the preset settings, the instructions of this
manual shall be followed carefully.
• All AC compressors are designed for 100% duty but 50%
operation is recommendable to prolong the lifetime.
• Do not remove the protection covers during operation as it may
cause electric shock or other personal injury.
• Do not lubricate the oil-less motor with oil, as it will destroy
important components.
MAINTENANCE
To ensure a long lifetime of the compressor, it is important that
inspection and maintenance is carried out regularly as described in
the following.
Preventive maintenance
Activity Weekly Monthly
One a year,
or every
2000 hours
aDrain condensate •
bCheck filter regulator •
cCheck for leaks •
dClean the unit •
eCheck safety valve •
fCheck inlet filter •
gCheck non-return
valve •
a) Drain condensate
Drain condensate by opening the drain cock on the receiver.
If mounted with auto drain, condensate will be drained
automatically. If drain bottle is installed, empty when necessary.
b) Check filter regulator
If a filter regulator is installed, check weekly and drain for
condensate by pressing the button at the bottom.
If auto drain is installed, the filter will be emptied automatically.
Check and change the filter and filter element in accordance with
the instructions in “Installation and maintenance instructions” for
the filter in question.
c) Check for leaks
Check motor, hoses and equipment for leaks.
Check the pumping time.
d) Clean the unit
Clean the unit when needed with a soft, damp cloth. If necessary,
use paraffin to remove adhesions. Dust and dirt prevent cooling.
e) Check safety valve
Check the safety valve with pressure in the receiver. The safety valve
is operated by pulling the ring (1) or turning the screw (2) depending
on the valve type.
f) Check intake filter
Check the intake filter and change it if necessary.
Remove the filter and replace.

5
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
g) Check the non-return valve
Turn off the compressor on the mains switch and pull out the
plug.
Empty the receiver for compressed air by operating the safety
valve. When the receiver is empty, the reading of the pressure
gauge is  bar.
Dismount the non-return valve from the receiver.
Disassemble the non-return valve and remove the O-ring ()
from the piston.
Clean the non-return valve.
Mount a new O-ring and re-assemble the non-return valve.
Re-install the non-return valve.
Please note that all service must be carried out by a qualified
person.
Adjustment of pressure switch
The working presure has been preset from the factory, and it is
normally not necessary to change this.
However, if it is necessary to change the preset settings, the
instructions mentioned below should be followed carefully.
Warning
The compressor is constructed and approved for a max.
pressure as stated under Technical Specifications - do not
adjust to a higher pressure.
Higher working pressure will reduce the lifetime of the
compressor.
The compressor will stop at max. pressure (stop pressure) and
start again at min. pressure (start pressure). The difference
between max. and min. pressure is the differens pressure.
Unscrew the lid of the pressure switch. Adjust max. pressure
adjusting the two springs marked A (clockwise: higher pressure).
Adjust the two springs identically.
Adjust the differens pressure adjusting the spring marked B
(clockwise: higher differens pressure, start pressure maintained).
Test of pumping time
The pumping time indicates the condition of the compressor.
. Check that there are no leaks in the system.
. Empty the air receiver of compressed air so that the
pressure gauge shows  bar.
. Close the filter regulator and check that the drain valve is
closed.
. Start the compressor and note the time it takes until it is
turned off again by the pressure switch. Check that the
pumping time agrees with the technical specifications for
the actual compressor system.
Please note that the pumping time in this manual is given for  to
max pressure.
Important
Always test the pumping time when cold. If the compressor is
warm, the pumping time will be considerably longer.

6
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
FAULT FINDING AND REPAIR
Important
Switch off and isolate from electrical supply before removing
any parts from the pump. Empty air receiver of air before
performing any operation on the compressors’ pressure
system.
1. Compressor does not start
a. The air receiver is pressurized. The motor will start when
the pressure has dropped to the preset start pressure.
Empty the receiver.
b. Check that the mains supply agrees with the motor
label.
c. No power from mains. Check fuses and plug.
d. Bad connection or broken cable.
e. The motor is overheated and the thermal protection
has switched it off. When cooled the motor will turn on
automatically. Go to section .
f. The compressor has not been unloaded and there
is back pressure on the piston. Ensure that the
compressor is unloaded each time it stops.
g. The motor is blocked.
h. Defective capacitor.
2. The compressor makes a buzzing sound but does not start
a. Leaky non-return valve. Dismount the pressure pipe and
check if air leaks from the non-return valve. Clean and
replace.
b. The motor is blocked.
3. The compressor runs but the pressure does not increase
a. Intake filter clogged. Replace.
b. Non-return valve is clogged. Clean or replace.
c. Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water or by letting unit stay over night
disconnected from mains. Pressure drop should not
exceed  bar.
d. Check the piston gaskets. Replace if necessary.
e. Defective valve plate. Contact your JUN-AIR distributor.
4. The motor gets very hot
a. The ambient temperature is too high. If the motor is
installed in a cabinet sufficient ventilation must be
ensured.
b. Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water or by letting unit stay over night
disconnected from mains. Pressure drop should not
exceed  bar.
c. The compressor is overloaded.
5. The compressor runs even if no air is tapped
a. Leaks in fittings, tubes or pneumatic equipment. Check
with soapy water or by letting unit stay over night
disconnected from mains. Pressure drop should not
exceed  bar.
6. The compressor does not start at min pressure or does not
stop at max pressure.
a. Defective pressure switch. Replace.
PRESSURE VESSEL
Pressure tested at I4-25 litre 24 bar
4-50 litre 18.3 bar
Directions for use
Application Receiver for compressed air
Receiver specifications See name plate
Installation Tubes, etc. must be installed with
suitable materials
Placement
Observe the working temperature of
the receiver
Ensure sufficient room for inspec-
tion and maintenance
The receiver must be kept in a hori-
zontal position
Corrosion protection
The surface treatment must be
maintained as required
Internal inspection at least every
five years
Drain condensate at least once a
week
Alternation/repair No welding must be made on pres-
surized parts
Safety valve
Ensures that PS will not be ex-
ceeded
Never adjust to a higher pressure
than PS
The capacity of the valve must be
calculated in accordance with the
volume of air supplied by the com-
pressor
PS - Maximum working pressure of
the receiver

7
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
Technical Data & Specifications
Specifications 106R-25B 106R-25BQ2 2x106R-40B
Electrical rating volts 120 V 230 V 230 V 120 V 230 V
Tank size
liter 25 40
U.S.
gallon 6.6 10.6
Weight kg 36 48 52 51
lbs 80 105 115 113
Dimensions
(w x h x d)
Cm 38.0 × 66.5 × 38.0 56.6 × 64 × 52 55.5 × 63.1 × 52.8
in 15.0 × 26.2 × 15.0 22.3 × 25.2 × 20.5 21.9 × 24.8 × 20.8
Continuous System
Output Flow @ Max.
Operating Pressure
LPM 51 44.2 @ 50 Hz
51.0 @ 60 Hz
44.7 @ 50 Hz
51.0 @ 60 Hz 86.4 92.1 @ 50 Hz 99.1 @ 60 Hz
CFM 1.8 1.6 @ 50 Hz
1.8 @ 60 Hz
1.6 @ 50 Hz
1.8 @ 60 Hz 3.1 2.9 @ 50 Hz 3.5 @ 60 Hz
Cut-in Pressure bar 6
psi 87
Cut-out Pressure bar 8
psi 116
Air Filtration mm 5
Safety Relief Valve
Pressure
bar 11
psi 160
Sound Level dB(A) 68 69.6 @ 50 Hz
68.0 @ 60 Hz
69.6 @ 50 Hz
68.0 @ 60 Hz 72.3 68.9 @ 50 Hz 70.9 @ 60 Hz
Operating
Temperature
°C 5 to 40
°F 41 to 104
Operating Relative
Humidity % 20 to 80
Pump Up Time
(0 to cut out) at
operating temperature
mm:ss 02:02 02:38 @ 50 Hz
02:14 @ 60 Hz
03:08 @ 50 Hz
02:38 @ 60 Hz 1:50 02:12 @ 50 Hz 01:50 @ 60 Hz
Technical modifications reserved.

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6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Performance Curves
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
020406080100 120
Flow (CFM)
Duty (psi)
106R-25B 120 V Air Flow
30
40
50
60
70
80
90
100
110
120
130
01 234567
89
Flow (lpm)
Duty (bar)
106R-25B 120 V Air Flow
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
020406080100 120
Flow (CFM)
Duty (psi)
106R-25B 230 V Air Flow
60 Hz
50 Hz
30
40
50
60
70
80
90
100
110
120
130
0246810
Flow (lpm)
Duty (bar)
106R-25B 230 V Air Flow
60 Hz
50 Hz
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
020406080100 120
Flow (CFM)
Duty (psi)
106R-25BQ2 230 V Air Flow
60 Hz
50 Hz
30
40
50
60
70
80
90
100
110
120
0246810
Flow (lpm)
Duty (bar)
106R-25BQ2 230 V Air Flow
60Hz
50Hz

9
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
0
1
2
3
4
5
6
7
8
9
020406080100 120
Flow (CFM)
Duty (psi)
2x106R-40B 120 V Air Flow
30
50
70
90
110
130
150
170
190
210
230
01 2345678910
Flow (lpm)
Duty (bar)
2x106R-40B 120 V Air Flow
0
1
2
3
4
5
6
7
8
9
020406080100 120
Flow (CFM)
Duty (psi)
2x106R-40B 230 V Air Flow
60Hz
50Hz
30
50
70
90
110
130
150
170
190
210
230
0246810
Flow (lpm)
Duty (bar)
2x106R-40B 230 V Air Flow
60 Hz
50 Hz

10
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Electrical Drawing Model R-B
SWITCH
PRESSURE
LINEMOTOR
N L1
YELLOW/GREEN
BROWN
BLUE
BROWN
BLUE
3xAWG163xAWG16
Z
Compressor
Motor
W
X
Ins.
Capacitor
Brown
Green &
Yellow
Red
Black
Orange
Brown
Compressor Chamber
230V
White
Blue
Brown
Blue
Brown
Black
Blue
White
Orange Red
Brown
Brown
Green &
Yellow
W
X
Z
Ca
pacitor
Compressor
Motor
Compressor Chamber
120V

11
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
Electrical Drawing Model R-BQ
PRESSURE SWITCH
Cooler Box
L1 N11
Q1 Q2 Q3 Q4
Orange
DRYER
Brown Blue
White
Unloader
FAN
N
L1
Brown
White
White
Red
Cable TieCable Tie
Black
eulBetihWdeROrange
Orange
Red
Brown
Black
Brown
Green
Black
PLC
Cable Tie
Green
Z
Compressor
Motor
W
X
Ins.
Capacitor
Brown
Green &
Yellow
Red
Black
Orange
Brown
Compressor Chamber
230V
White Blue
Blue Brown
Orange
Black
Black
Blue
BlackBlack

12
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Electrical Drawing Model xR-B
White
Blue
SWITCH
PRESSURE
IN
OUT
PRESSURE REIEF
AUTOMATIC DRAIN
YELLOW/GREEN
YELLOW/GREEN
Black
L1 N
BLUE
BROWN
YELLOW/GREEN
3xAWG18
3xAWG18
3xAWG16
Black
White
White
BLUE
BROWN
3xAWG16
BLUE
BROWN
3xAWG16
Brown Blue
230V
Compressor Chamber
Brown
Orange
Black
Red
Green &
Yellow
Brown
Capacitor
Ins.
X
W
Compressor
Motor
Z
White
Blue
Brown Blue
230V
Compressor Chamber
Brown
Orange
Black
Red
Green &
Yellow
Brown
Capacitor
Ins.
Compressor
Motor
Z
X
W
FOR OPTIONAL CONNECTIONS
L1
N
120V
Compressor Chamber
Compressor
Motor
Capacitor
Z
X
W
Green &
Yellow
Brown
Brown
Red Orange White
Blue
Black

13
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
Pneumatic Diagram Model R-B
25 Liter Tank
Check
Valve
Regulated
Pressure
Pressure Switch
Tank
Pressure
SAFETY VALVE
5
µm
Filter
COMPRESSOR
AIR OUTLE
T
Compressor
with Motor
Intake Filte
r
TO WASTE
Valve
Valve
Relief Valve
Muffler
Pneumatic Diagram Model R-BQ
To Drain Bole
In
take Filter
Aercooler
Regulated
Pressure
Tank
Pressure
COMPRESSOR AIR
OUTLET
25L
TA
NK
ADSORPTION DRYER - ADJ50/150/300
Valve
Compressor
DRYER
Pressure
Relief
Safety
Valve
Pressure
Switch
Filter with
Automac Drain
Filter without
Automac Drain
Counter with
Reducer
Pressure
Relief
Non
Return
Valve
Non
Return
Valve

14
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Pneumatic Diagram Model xR-B
40 Liter Tank
Regulated
Pressure
Pressure Switch
SAFETY VALVE
5
µm
Filter
COMPRESSOR AIR OUTLET
Compressor
with Motor
Intake Filter
TO WASTE
Valve
Valve
Relief Valve Intake Filter
Compressor
with Motor
Tank
Pressure
Non
Return
Valve
Non
Return
Valve
Non
Return
Valve

15
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
Description Kit
Number Service Interval
R Preventative Maintenance Kit K  hours or one year
R Service Kit - Low Pressure K  hours or five years
R Service Kit - High Pressure K  hours or five years
R Capacitor Replacement Kit K Five years
R Capacitor Cover K As needed
R Spare Parts K As needed
R Retrofit Parts for OF/OF K As needed
Basic B System Outlet Hose Kit K As needed
Basic BQ System Outlet Hose Kit K As needed
Regulator Filter Kit   hours or one year
Regulator Filter Bowl Manual Drain Kit  As needed
Regulator Filter Bowl Automatic Drain Kit  As needed
 PARKER Reg Kit  As needed
Basic System Kits

16
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Basic Systems R-B  V Feature Diagram
5um FILTER
FILTER
INTAKE
(UNDER CO
VER)
COMPRESSOR
CAPACITOR,
DRAIN
TANK
MANUAL
REGULATOR
SAFE
TY
VALVE
PRESSURE
SWITCH
2X PRESSURE
GAUGES
NON-RETURN
VALVE

17
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
Basic Systems R-B  V Feature Diagram
SAFE
TY
VA
LVE
GAUGE
PRESSURE
SWITCH
PRESSURE
PRESSURE
GAUGE
CHECK VALVE
MANUAL DRAI
N
TANK
REGULATOR
(UNDER COVER)
FILTER
COMPRESSOR
CAPACITOR
5um FILTER

18
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Basic Systems R-BQ Feature Diagram
NON-RETURN
VALVE
PRESSURE
SWITCH
VALVE
SAFETY
GAUGE
PRESSURE
PRESSURE
GAUGE
DRYER
INTAKE FILTER
(UNDER COVER)
COMPRESSOR
CAPACITOR,
DRAIN
TANK
REGULATO
R
MANUAL
SWITCH
PRESSURE
COOLER

19
© 2023, JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
106R Basic Systems User Guide 6190770 (Rev B)
Basic Systems xR-B  V Feature Diagram
VALVE
NON-RETURN
SILENCER
(UNDER COVERS)
REGULATO
R
5um FILTER
AUTO-DRAIN UNLOADER
2X INTAKE FILTERS
2X COMPRESSORS
2X NON-RETURN
VALVES
2X CAPACITORS,
SAFETY VALVE
2X PRESSURE
GAUGES
PRESSURE
SWITCH

20
6190770 (Rev B) 106R Basic Systems User Guide
© 2023 JUN-AIR
We reserve the right to make any alterations which may be due to any technical improvements
Printed in the USA
Basic Systems xR-B  V Feature Diagram
SAFE
TY
VA
LVE
GAUGE
PRESSURE
SWITCH
PRESSURE
PRESSURE
GAUGE
CHECK VALVE
MANUAL DRAI
N
TANK
REGULATOR
(UNDER COVER)
FILTER
COMPRESSOR
CAPACITOR
5um FILTER