Snap-On Dual 3412 User Manual
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Snap-On Dual 3412 User Manual

Snap-On Dual 3412 User Manual

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T T a a b b l l e e o o f f C C o o n n t t e e n n t t s s
S S a a f f e e t t y y .................................................................................................................... I
I I n n t t r r o o d d u u c c t t i i o o n n ...................................................................................................... 1-1
Refrigerant Gases .................................................................................................................... 1-2
Refrigerant Handling .................................................................................................... 1-3
Refrigerant Safety ...................................................................................................... 1-3
Refrigerant Substitute Warning .................................................................................... 1-4
Functional Description .............................................................................................................. 1-5
Typical Front View ...................................................................................................... 1-5
R-12 Accessories ........................................................................................................ 1-8
R-134a Accessories .................................................................................................... 1-9
Specifications .......................................................................................................................... 1-10
General .................................................................................................................... 1-10
Operating .................................................................................................................. 1-10
Storage .................................................................................................................... 1-11
Capacities ................................................................................................................ 1-11
I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n ................................................................................ 2-1
Connecting Service Hoses To Dual 3412 .................................................................... 2-1
Component Identification .......................................................................................................... 2-2
Preparing and Installing Recovery Tank ...................................................................... 2-3
Operation .................................................................................................................................. 2-6
Preliminary Checks ...................................................................................................... 2-7
Connecting Service Hoses To Vehicle ........................................................................ 2-9
Recover/Recycle Refrigerant From Vehicle ................................................................ 2-10
Purging Non-condensable Gas .................................................................................. 2-11
Evacuating A/C System ............................................................................................ 2-12
Charging A/C System ................................................................................................ 2-13
Displaying Refrigerant Amount .................................................................................. 2-14
Tank Full/Empty ........................................................................................................ 2-14
Removing Recovery Tank .......................................................................................... 2-14
Evacuating Service Hoses ........................................................................................ 2-14
Adding Refrigerant To Dual 3412 .............................................................................. 2-15
M M a a i i n n t t e e n n a a n n c c e e ...................................................................................................... 3-1
Equipment Tips .......................................................................................................... 3-1
Master Filter .............................................................................................................................. 3-2
Moisture Indicator ........................................................................................................ 3-2
Master Filter Maintenance Schedule - R12 .................................................................. 3-3
Master Filter Maintenance Schedule - R134a .............................................................. 3-5
Changing the Master Filter .......................................................................................... 3-6
Pump ........................................................................................................................................ 3-7
Maintaining the Pump .................................................................................................. 3-7
Prolonged Storage of Dual 3412 .............................................................................................. 3-8
Troubleshooting ........................................................................................................................ 3-9
Replacement Parts .................................................................................................... 3-10
Optional Accessories ................................................................................................ 3-10
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  • Page 1: Table Of Contents

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n ................2-1 Connecting Service Hoses To Dual 3412 ..............2-1 Component Identification ......................
  • Page 2 T T a a b b l l e e o o f f C C o o n n t t e e n n t t s s...
  • Page 3 T T a a b b l l e e o o f f I I l l l l u u s s t t r r a a t t i i o o n n s s I I n n t t r r o o d d u u c c t t i i o o n n Figure 1-1: Typical Front View ....................
  • Page 4 T T r r a a d d e e m m a a r r k k A A c c k k n n o o w w l l e e d d g g e e m m e e n n t t s s ® ® S S n n a a p p - - o o n n is a trademark of Snap-on Technologies Incorporated. . ® ® S S u u n n is a trademark of Snap-on Tools Company.
  • Page 5 U U s s i i n n g g t t h h i i s s M M a a n n u u a a l l This manual contains instructions for use and setup of the unit. A table of contents and table of illustrations are provided to make this manual easy to use.
  • Page 6 U U s s i i n n g g t t h h i i s s M M a a n n u u a a l l Equipment Damage Situations arise during testing that could damage the vehicle or the test equipment.
  • Page 7 Recycle is the only process that removes refrigerant. There is not a separate recovery process. Dual 3412 is a single pass unit. This means refrigerant is filtered and dried before reaching the recovery tank. Once in the recovery tank, it is ready for reuse, after manual purging, if necessary.
  • Page 8 U U s s i i n n g g t t h h i i s s M M a a n n u u a a l l viii...

  • Page 9: S S A A F F E E T T Y Y

    S S a a f f e e t t y y I I n n f f o o r r m m a a t t i i o o n n Safety Notice For your safety, read this manual thoroughly before operating D D u u a a l l 3 3 4 4 1 1 2 2 .
  • Page 10 S S a a f f e e t t y y I I n n f f o o r r m m a a t t i i o o n n The signal word indicates the level of hazard in a situation. •...
  • Page 11 S S a a f f e e t t y y I I n n f f o o r r m m a a t t i i o o n n Refrigerant Risk of expelling refrigerant under pressure. •...
  • Page 12 S S a a f f e e t t y y I I n n f f o o r r m m a a t t i i o o n n General Engine systems can malfunction expelling fuel, oil vapors, hot steam, hot toxic exhaust gases, acid, refrigerant and other debris.
  • Page 13 S S a a f f e e t t y y I I n n f f o o r r m m a a t t i i o o n n A test vehicle may move if not properly prepared. •...
  • Page 14 S S a a f f e e t t y y I I n n f f o o r r m m a a t t i i o o n n...

  • Page 15: I I N N T T R R O O D D U U C C T T I I O O N N

    This manual applies to the following D D u u a a l l 3 3 4 4 1 1 2 2 model: Name Model Refrigerant Type Voltage Dual 3412 EEAC112B R-12/R-134a 120 VAC References in text to D D u u a a l l 3 3 4 4 1 1 2 2 apply to both refrigerants.

  • Page 16: Refrigerant Gases

    I I n n t t r r o o d d u u c c t t i i o o n n Refrigerant Gases Halogens are any of the five elements (fluorine, chlorine, bromine, iodine and astatine) that form part of group 7a of the Periodic Table of Elements.

  • Page 17: Refrigerant Handling

    I I n n t t r r o o d d u u c c t t i i o o n n Refrigerant Handling Mobile air conditioning systems contain chemical mixtures that require special handling to avoid injury and to avoid venting refrigerant into the atmosphere.

  • Page 18: Refrigerant Substitute Warning

    I I n n t t r r o o d d u u c c t t i i o o n n Refrigerant Substitute Warning • Do not use D D u u a a l l 3 3 4 4 1 1 2 2 or leak detector equipment if R-12 substitutes are suspected.

  • Page 19: Functional Description

    I I n n t t r r o o d d u u c c t t i i o o n n Functional Description Typical Front View Figure 1-1: Typical Front View A — Gauge Set High and low pressure gauge manifold set for monitoring air conditioning system pressures.
  • Page 20 I I n n t t r r o o d d u u c c t t i i o o n n Control Knob Use to select Vacuum, Off, or Recycle. Compressor Power Switch Turns recovery compressor on and off. Must be on (I) for unit operation.
  • Page 21 I I n n t t r r o o d d u u c c t t i i o o n n C— Hour Meter (On Sides) Registers recovery compressor run time to guide master filter maintenance. For additional information refer to Chapter 3–Master Filter.

  • Page 22: R-12 Accessories

    I I n n t t r r o o d d u u c c t t i i o o n n R-12 Accessories Figure 1-3: R-12 Accessories A — Gauge Set High and low pressure gauge manifold set monitors air conditioning system pressures.

  • Page 23: R-134A Accessories

    I I n n t t r r o o d d u u c c t t i i o o n n R-134a Accessories Figure 1-4: R-134a Accessories A — Gauge Set High and low pressure gauge manifold set monitors air conditioning system pressures.

  • Page 24: Specifications

    I I n n t t r r o o d d u u c c t t i i o o n n Specifications General Power 120 VAC, 50/60 Hz, 12 amps maximum Shipping Weight 260 pounds Dimensions Depth 26"...

  • Page 25: Storage

    I I n n t t r r o o d d u u c c t t i i o o n n Storage Temperature -4–158°F Relative Humidity Up to 80%, non-condensing Capacities Recovery Up to 25 lbs total 1-11...
  • Page 26 I I n n t t r r o o d d u u c c t t i i o o n n 1-12...
  • Page 27 I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Use information in this chapter to: •...

  • Page 28: I I N N S S T T A A L L L L A A T T I I O O N N A A N N D D O O P P E E R R A A T T I I O O N N

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Figure 2-1: Service Hoses and Gauge Sets R-134a A –...

  • Page 29: Preparing And Installing Recovery Tank

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Preparing and Installing Recovery Tank The recovery tanks are shipped with a dry air charge.
  • Page 30 I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n 6.
  • Page 31 I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n 22.

  • Page 32: Operation

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Figure 2-2: Recovery Tank and Temperature Probe Use only the 30 pound capacity recovery tank supplied with D D u u a a l l 3 3 4 4 1 1 2 2 or one indicated by the warning label.

  • Page 33: Preliminary Checks

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Preliminary Checks Successful use of D D u u a a l l 3 3 4 4 1 1 2 2 depends on several external factors.
  • Page 34 I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Keep the service hoses away from moving or hot engine parts.

  • Page 35: Connecting Service Hoses To Vehicle

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Connecting Service Hoses to Vehicle Figure 2-3: Service Hose Connections to Vehicle B –...

  • Page 36: Recover/Recycle Refrigerant From Vehicle

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Recover/Recycle Refrigerant from Vehicle Be sure vehicle is at operating temperature before...

  • Page 37: Purging Non-Condensable Gas

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n 10.

  • Page 38: Evacuating A/C System

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Evacuating A/C System Use this procedure to remove air and moisture from vehicle A/C system.

  • Page 39: Charging A/C System

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Charging A/C System 1.

  • Page 40: Displaying Refrigerant Amount

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n Displaying Refrigerant Amount Use this procedure to determine the amount of refrigerant in recovery tank and amount able to be charged.

  • Page 41: Adding Refrigerant To Dual 3412

    I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n 3.
  • Page 42 I I n n s s t t a a l l l l a a t t i i o o n n a a n n d d O O p p e e r r a a t t i i o o n n 7.

  • Page 43: M M A A I I N N T T E E N N A A N N C C E E

    M M a a i i n n t t e e n n a a n n c c e e Use this chapter to maintain D D u u a a l l 3 3 4 4 1 1 2 2 : •...

  • Page 44: Master Filter

    M M a a i i n n t t e e n n a a n n c c e e Master Filter Change the master filter when the moisture indicator is violet or when the hour meter has accumulated 20 additional hours since the last master filter change.

  • Page 45: Master Filter Maintenance Schedule - R12

    M M a a i i n n t t e e n n a a n n c c e e Master Filter Maintenance Schedule - R12 Hour Meter Reading Next Change Date Starting Point Meter Reading...
  • Page 46 M M a a i i n n t t e e n n a a n n c c e e...

  • Page 47: Master Filter Maintenance Schedule - R134A

    M M a a i i n n t t e e n n a a n n c c e e Master Filter Maintenance Schedule - R134a Hour Meter Reading Next Change Date Starting Point Meter Reading...

  • Page 48: Changing The Master Filter

    M M a a i i n n t t e e n n a a n n c c e e Changing the Master Filter Use the procedure in this section to change the master filter. • Wear safety goggles and protective gloves, user and bystander.

  • Page 49: Pump

    M M a a i i n n t t e e n n a a n n c c e e 9. Check for leaks. Pump The oil in the pump assembly must be changed quarterly to prolong pump life. The optional oil change kit is recommended. For additional information refer to Replacement Parts in this chapter.
  • Page 50 M M a a i i n n t t e e n n a a n n c c e e • Wear safety goggles and protective gloves, user and bystander. • Read, understand and follow S S a a f f e e t t y y I I n n f f o o r r m m a a t t i i o o n n in the front of this manual.

  • Page 51: Troubleshooting

    M M a a i i n n t t e e n n a a n n c c e e Troubleshooting Symptom Possible Cause Remedy Machine does not turn on • Power cord not plugged in – Plug in cord •...

  • Page 52: Replacement Parts

    M M a a i i n n t t e e n n a a n n c c e e Replacement Parts For R-12 Part Number Description 0647-0196-01 ........GM Adaptor, high-side 0647-0197-01 ....GM/Ford Adaptor, Quick Disconnect 0647-0199-01 ....

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