WD Catalog 2018

6-11

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Compressor oil injectors are available that connect to the manifold gauge set or

charging station to dispense refrigeration oil.

It’s a good idea to have a torque wrench, a vacuum tester, a Schrader valve

core remover/installer and any other special system testers you would need if

you are going to service specific systems.

Earlier we mentioned refrigerant scales or charging meters and charging

stations. They are all designed to provide an accurate measure of the refriger-

ant you use when charging the AC system. The more elaborate charging

stations combine the refrigerant supply, manifold, gauges, a heated charging

cylinder, hoses and vacuum pump on an easily moved cart or stand. Some even

have refrigeration oil dispensing and leak detection capability built in. The

more expensive units have electronic controls. Figure 6-11 illustrates some of

these devices.

Charging Stations, Basic Description of Use

(Refer to Fig. 6-11.)

After repairing the AC system use this station to evacuate air

and moisture from it. The station adds the recovered/recycled

refrigerant to the AC system. A metering device is used in

conjunction with this station to monitor the amount of refrig-

erant added.

This all purpose recovery/recycling/recharging station pro-

vides all necessary service features in one package. This sta-

tion recycles the refrigerant during the evacuation cycle. A

microprocessor control allows automatic recovery shutoff,

programmable evacuation and charging cycles.

Other electronic devices you may want to consider are an electronic digital

thermometer or electronic sight glass. The advantage of the electronic ther-

mometer is reading speed (it will give you a reading in a few seconds or less),

accuracy, and temperature range, all in one unit.

Note:

Separate charging stations are required for R-12 and

R-134a.

Other Equipment

Figure 6-11

Basic and electronically

controlled charging stations

and a charging meter are

pictured.

b.) ALL PURPOSE CHARGING STATION

INCLUDES AUTOMATIC EVACUATION,

OIL INJECTION, RECHARGING,

ELECTRONIC CONTROLS TO ADJUST

VACUUM PUMPING TIME AND LEAK

DETECTION

a.) CHARGING STATION WITH A

VACUUM PUMP AND CHARGING

CYLINDER