Snap-On Dual 3412, User Manual

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.................................................................................................................... I
IInnttrroodduuccttiioonn
...................................................................................................... 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
IInnssttaallllaattiioonn aanndd O Oppeerraattiioonn
................................................................................ 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 Maaiinntteennaannccee
...................................................................................................... 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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