Robinair 49134A 2-Valve Automotive Manifold Manuale Utente Scaricare il pdf

49134A and 48134A 2-Valve Automotive Manifold

The manifold is designed so all three lower ttings are connected to

each other by internal passages. Separate passages from the low- and

high-side ttings to their respective gauges give pressure and vacuum

readings, whether the handwheels are open or closed. Handwheels and

gauges are color-coded, with the blue compound gauge on the low (or

left) side, and the red pressure gauge on the high (or right) side.

Connecting Field Service Couplers

Field service couplers are provided to access the vehicle's service ports.

The service coupler must be in the closed position when it is

connected to the external tting on the vehicle.

1. To close the service coupler, turn the handle counterclockwise until

nger-tight.

2. Place the service coupler on the external tting.

3. Push in on the handle of the service coupler with your thumb,

while pulling up on the sleeve until it bottoms on the external

tting; then release. Verify it is correctly seated by pulling up on

the service coupler.

4. For maximum ow, turn the handle clockwise until it stops.

Diagnosing System Operation

1. Connect the blue low-side hose to the A/C system’s low-side

service port. Connect the red high-side hose to the A/C system’s

high-side service port.

2. With the manifold handwheels closed, read the pressures indicated

on the gauges. Compare these pressures and temperatures to the

A/C system manufacturer’s specications for operation.

3. If the system is within correct operating guidelines, disconnect the

manifold hoses from the system. If repairs are necessary, follow

the steps for recovering, evacuating, and recharging the system.

Recovering Refrigerant

According to federal law, refrigerant must not be

exhausted to the atmosphere.

1. Verify the blue low-side hose is connected to the A/C system’s

low-side service port, and the red high-side hose is connected to

the A/C system’s high-side service port. Note: Typically, the yellow

center hose is connected to the inlet of the recovery unit.

2. Follow the instructions provided with the recovery unit for correct

recovery of refrigerant from the A/C system.

WARNING

• Wear safety goggles when working

with refrigerants. Refrigerants can

cause eye injury.

• Disconnect hoses using extreme

caution! Pressurized refrigerant may

be present in hoses. Point hoses away

from you and anyone nearby.

Instructions

Evacuating and Charging a Refrigerant System

1. Connect the blue low-side hose to the A/C system’s low-

side

service port. Connect the red high-side hose to the A/C system’s

high-side service port.

2. Check the manifold gauge pressure reading to verify the A/C

system has been recovered correctly. If not, follow steps under

Recovering Refrigerant. If it has, connect the center yellow

charging hose to a vacuum pump.

3. Open the high- and low-side handwheels. Start the vacuum pump.

4. After evacuating the system according to the manufacturer’s

specications, close both the high- and low-side handwheels, and

turn off the vacuum pump.

5. Disconnect the yellow hose from the vacuum pump, and connect it

to the refrigerant supply tank.

6. Slightly open the refrigerant supply valve. Purge air from the

yellow charging hose at the manifold. Close the supply valve.

7. You may now charge the A/C system according to the

manufacturer’s specications.

•

If system specications call for charging on the high side, close

the manifold’s blue low-side handwheel, open the refrigerant

supply valve, and open the manifold’s red high-side handwheel.

After dispensing the correct amount of refrigerant, close the red

high-side handwheel, and close the refrigerant supply valve.

•

If system specications call for charging on the low side, close

the manifold’s red high-side handwheel, open the refrigerant

supply valve, and open the manifold’s blue low-side handwheel.

After dispensing the correct amount of refrigerant, close the blue

low-side handwheel, and close the refrigerant supply valve.

8. After the system is charged, close both manifold handwheels.

Let the compressor run, and check the manifold’s gauge pressure

readings to verify the system is operating correctly. If not, adjust

the system as necessary. To disconnect the manifold when the

system is operating correctly, close both handwheels on the

manifold. Carefully remove the charging hoses from the system.

Charging is now complete.

556774 (Rev. B, April 22, 2014) © Bosch Automotive Service Solutions LLC

Because of ongoing product improvements, we reserve the right to

change design, specications, and materials without notice.

☎

For more information, call TOLL-FREE

1-800-822-5561 in the continental U.S. and Canada.

In all other locations, contact your local distributor.

655 EISENHOWER DRIVE

OWATONNA MN 55060

CUSTOMER SERVICE : 1-800-533-6127

FAX : 1-800-322-2890

TECHNICAL SERVICE : 1-800-822-5561

FAX : 1-866-259-1241

WEBSITE : WWW.ROBINAIR.COM

Maintenance

To keep the manifold in good

operating condition:

•

Periodically replace o-rings and

valve seats.

•

Periodically lubricate o-rings

with Robinair No. 13067 High

Vacuum Grease.

Replacement Parts List

559393 Low-side Coupler

559392 High-side Coupler

559391 Blue Hose (134a)

559390 Yellow Hose (134a)

559389 Red Hose (134a)

Warranty

This manifold is covered by a One-Year Limited Warranty. We guarantee the

manifold to be free from defects in material and workmanship under normal use

and service for one year from date of sale. See a distributor for details.

Instructions 1

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Pagina 1 - Instructions

49134A and 48134A 2-Valve Automotive ManifoldThe manifold is designed so all three lower ttings are connected to each other by internal passages. Se

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