Robinair 34788-H User Manual

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Operating Manual for

Model 34788-H

Recovery, Recycling, Recharging Unit

Model 34788-H

Recovery, Recycling, & Recharging Unit

SAFETY DEFINITIONS: Follow all WARNING, CAUTION, and NOTE messages in this manual. These messages are defined as follows: WARNING means you may risk serious personal injury or death; CAUTION means you may risk personal injury, property damage, or unit damage; and NOTEs and OPERATING TIPS provide clarity and helpful information. These safety messages cover situations ROBINAIR is aware of. ROBINAIR cannot know, evaluate, and advise you as to all possible hazards. You must verify that conditions and procedures do not jeopardize your personal safety.

DISCLAIMER: Information, illustrations, and specifications contained in this manual are based on the latest information available at the time of publication. The right is reserved to make changes at any time without obligation to notify any person or organization of such revisions or changes. Further, ROBINAIR shall not be liable for errors contained herein or for incidental or consequential damages (including lost profits) in connection with the furnishing, performance, or use of this material. If necessary, obtain additional health and safety information from the appropriate government agencies and the vehicle, refrigerant, and lubricant manufacturers.

WARNINGS

ALLOW ONLY QUALIFIED PERSONNEL TO OPERATE THE UNIT. Before operating the unit, read and follow

the instructions and warnings in this manual. The operator must be familiar with air conditioning and refrigeration

systems, refrigerants, and the dangers of pressurized components. If the operator cannot read this manual, operating instructions and safety precautions must be read and discussed in the operator’s native language.

PRESSURIZED TANK CONTAINS LIQUID REFRIGERANT. Do not overfill the internal storage vessel, because overfilling may cause explosion and personal injury or death. Do not recover refrigerants into nonrefillable containers; use only federally authorized refillable containers (DOT spec. 4BW or 4BA).

HOSES MAY CONTAIN LIQUID REFRIGERANT UNDER PRESSURE. Contact with refrigerant may cause personal injury. Wear protective equipment, including safety goggles. Disconnect hoses using extreme caution.

AVOID BREATHING A/C REFRIGERANT AND LUBRICANT VAPOR OR MIST. Exposure may irritate eyes, nose, and throat. To remove refrigerant from the A/C system, use only equipment certified for the type of refrigerant being removed.

DO NOT USE AN EXTENSION CORD. An extension cord may overheat and cause fire. If you must use an extension cord, use the shortest possible cord with a minimum size of 14 AWG.

TO REDUCE THE RISK OF FIRE, do not use the unit in the vicinity of spilled or open containers of gasoline

or other flammable substances.

CAUTION—DO NOT PRESSURE TEST OR LEAK TEST EQUIPMENT AND / OR VEHICLE AIR CONDI-

TIONING SYSTEMS WITH COMPRESSED AIR. Some mixtures of air and refrigerant have been shown to be

combustible at elevated pressures. These mixtures, if ignited, may cause injury or property damage.

TO PREVENT CROSS-CONTAMINATION, USE THIS UNIT WITH R-134A REFRIGERANT ONLY. The unit is designed to recover, recycle, and recharge only R-134a refrigerant. Do not attempt to adapt the unit for another refrigerant. Do not mix refrigerant types through a system or in the same container; mixing of refrigerants will cause severe damage to the unit and the vehicle air conditioning system.

HIGH VOLTAGE ELECTRICITY INSIDE THE UNIT HAS A RISK OF ELECTRICAL SHOCK. Exposure may cause personal injury. Disconnect the power before servicing the unit.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

OPERATING NOTE: At temperatures exceeding 120° F / 49° C, wait 10 minutes between recovery jobs.

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	.	. .	.	2
Technical Specifications . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	.	. .	.	2
Keypad Functions . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . .	.	.	.	3. . . . . . . . .
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	.	. .	.	3
Menu Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	.	4
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	.	5
Unpack the Accessory Kit . . . . . . . . . . . . . . .	. . . . . . . . . .	.	.	.	5. . . . . . . .
Power Up the Unit . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	. . .		.	5. . .
Select a Language . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	.	5
Select Operating Units . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	.	5
Set Tank Fill Level . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . .	.	. .	.	6. . . .
Add Oil to the Vacuum Pump . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	.	6
Fill the Internal Storage Vessel . . . . . . . . . . . .	. . . . . . . . . .	.	.	.	7. . . . . . .
Operating Instructions . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . .	.	.	. .8. . . . . .
Recover Refrigerant from a Vehicle . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	.	8
Evacuate the A/C System . . . . . . . . . . . . . . .	. . . . . . . . . .	.	.	.	9. . . . . . . .
Replenish A/C System Oil . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . .		. .10. .
Recharge the A/C System . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	11
Operating Instructions — Automatic . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	13
System Flush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	15
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	18
General . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . .	. .		17. . . . . . . . . . .
Electrical Protection . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	17
Manually Fill the Internal Storage Vessel (ISV) . . . .	. . . . . . . . . . . .	. .	.	17
Tank Fill Hose Filter Service . . . . . . . . . . . . .	. . . . . . . . . . . 18. . . . . . . . .
Replace the Filter-Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19. .
Adjust Tank Fill Level . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	20
Change Vacuum Pump Oil. . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	21
Scale Calibration Check . . . . . . . . . . . . . .	. . . . . . . .	.	.	.22. . . . . . . . . . .
Check for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	22
Replacement Parts . . . . . . . . . . . . . . . . . .	. . . . . . . . .	.	. 23. . . . . . . . . . .
Spanish Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	25
French Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . .	. .	.	49
Safety Precautions . . . . . . . . . . . . . . . . . . . . .	. Inside. . . . Front. .	Cover
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. .Inside Back Cover

IMPORTANT: To comply with federal law governing A/C system service, you must complete and mail the MVAC Certification Form included in the accessory kit. Technicians using this equipment must be certified under EPA Section 609 (Environmental Protection Agency). For more information, read the MACS information included in the accessory kit, or visit the MACS website at www..macsw..org..

To validate the warranty provided by Robinair, complete the warranty card included in the accessory kit, and mail it within ten days from the purchase date of the unit..

560826 Rev. D, August 23, 2013

Introduction

Robinair No. 34788-H is used on R-134a vehicles and is designed to be compatible with existing service equipment and standard service procedures. This unit is a UL-listed, singlepass system that meets SAE specifications for recycled refrigerant. Follow the SAE-J2211 recommended service procedure for the containment of R-134a.

The unit includes a 1.5 cfm (42 l/m) Robinair high vacuum pump for fast, thorough evacuation. The compressor pulls the A/C system to 0 psig, then works in series with the vacuum pump to achieve highly efficient recovery and immediate recharge. If the system is not opened for service, there is no need to pull additional vacuum. If the system is opened for service, use the unit’s vacuum cycle to remove air and moisture from the A/C system. (We recommend

a minimum 15-minute vacuum, or follow the vehicle manufacturer’s specs.) Note: R-134a systems require special oils. Refer to the A/C system manufacturer’s service manual for oil specifications.

Control Panel: folds flat for storage.

Manifold Gauges: connect to vehicle A/C system; show system’s low-side and high-side pressure.

Tool Storage Areas

(additional storage on back side for extra filter-driers and oil bottles).

Flow Indicators: red light indicates high-side

flow from vehicle A/C system through unit; blue light indicates lowside flow from vehicle A/C system through unit.

Digital Display: visual interface between operator and machine.

Main Power Switch: supplies electrical power to unit.

Technical Specifications

Voltage . . . . . . . . . . . . . . . . . . . . 115V,. . . 60 Hz

Operating Range . . 50° to 120° F (11° to 49° C) Filter-Drier . . . . . . . . . 43. . cu. . in. spin-on type

Pump Free-Air Displacement . 1. .5 cfm (42 l/m)

Dimensions . . . . . . . . 49". . .H x 34" W x 23" D

. . . . . . . . . . .(124.5 cm x 86.4 cm x 58.4 cm)

Introduction

Keypad Functions

START

YES

STOP

AUTOMATIC

START / YES begins or resumes a function, or answers a query.

STOP / NO terminates or pauses a function, or answers a query.

MENU displays the selection menu.

ARROWS are used for scrolling through menu items.

AUTOMATIC activates a menu that helps the user set up an automatic recover / vacuum / leak test / charge sequence.

RECOVER

VACUUM

INJECT OIL

CHARGE

REFRIGERANT

DATABASE

RECOVER activates the recovery sequence.

VACUUM activates the vacuum sequence, followed by an option to activate a leak test.

INJECT OIL – not applicable to this unit.

CHARGE charges the vehicle A/C system with a programmed amount of refrigerant.

REFRIGERANT DATABASE (optional) offers access to system oil and refrigerant specifications by vehicle model and year. Purchase Robinair No. 34411.

When the unit is not performing a function, pressing the UP or DOWN arrow key adjusts contrast on the digital display.

Keypad

Glossary

A/C System : The vehicle air conditioning system being serviced.

Internal Storage Vessel : The refillable refrigerant storage vessel designed specifically for this unit; 30 lb. (14 kg).

Source Tank : A disposable tank of new refrigerant used to refill the internal storage vessel; not included.

Unit : Model No. 34788-H.

560826 Rev. D, August 23, 2013

Introduction

Menu Functions

1.Press the MENU button on the keypad.

2.Press the UP or DOWN arrow key to scroll through the menu choices shown on the second line of the display :

SELECT LANGUAGE VERSION X.XX SELECT UNITS MAINTAIN VACUUM OIL MAINTAIN FILTER REFRIG MANAGEMENT MANUAL REFILL ADJUST TANK FILL LVL CALIBRATION CHECK SELECT BEEPER TONE SERVICE MENU

HOSE FLUSH DISPLAY TANK INFO SYSTEM FLUSH

3.Press START / YES to make a choice from the menu. Press STOP / NO to pause during any process, and STOP / NO a second time to exit a process.

Start / Yes	Stop / No
Button	Button

Arrow

Keys

Button

Select Language

Operatormaychoosetohavepromptsdisplayedinoneofthree languages: English, Spanish, or French.

Version X..XX

Displays the revision level of the software in the unit.

Select Units

The operator may choose to have test results displayed in

Imperial (lb.), Imperial (lb. and oz.), or Metric (kg).

Maintain Vacuum Oil

For maximum vacuum pump performance, change vacuum pump oil after every 10 hours of operation. This menu item

displays how long the vacuum pump has operated since the last oil change, and allows the user to reset the value once an oil change is complete. Refer to the instructions outlined in the Maintenance section under Change Vacuum Pump Oil..

Maintain Filter

The filter-drier removes acid, particulates, and moisture from the refrigerant. To meet SAE J-2788 requirements, it is mandatory to replace the filter-drier after 150 lbs. (68 kg) of refrigerant has been filtered. This menu item shows how much refrigerant has been filtered since the last filter change, and allows the user to reset the value once a filter change is complete. A code, which appears on the filter, must beenteredintotheunittoensurecompliancewithSAEJ-2788. Refer to instructions outlined in the Maintenance section under

Replace the Filter-Drier..

Refrig Management

Displays the amount of refrigerant recovered, charged, and replenished (for the life of the unit), and filtered (since the last filter change).

Manual Refill

Use to transfer refrigerant from the source tank to the internal storage vessel (ISV). Refer to instructions outlined in the Maintenance section under Manually Fill the ISV..

Adjust Tank Fill LVL

When connected to a refrigerant source, the unit maintains a pre-set amount of refrigerant in the internal storage vessel (default is 15 lbs.). This value may be adjusted up or down to suit the user’s needs. Refer to instructions outlined in the Maintenance section under Adjust Tank Fill Level..

Calibration Check

Use to verify internal scale calibration. Refer to instructions in Maintenance section under Scale Calibration Check..

Select Beeper Tone

Select one of two tones for an alert signal, or mute the signal completely.

Service Menu

For Robinair service center use only.

Hose Flush

Flushes residual PAG oil from the unit for service of electric POE oil-based hybrid systems.

Display Tank Info

Displaysinternalstoragevessel(ISV)pressureandtemperature. Use to check the ISV for excessive pressure.

System Flush

When used with the appropriate flush adapter kit, this menu item allows the A/C system or component to be flushed with

R-134a refrigerant.

Setup

Unpack the Accessory Kit

Unpack the accessory kit from the bag, and remove the plastic packaging. The kit consists of

•A calibration weight.

•Vacuum pump oil, oil filler cap, and tube.

•Plastic pouch containing a warranty card (to be completed and mailed), applicable MSDS

sheets, a service center listing, and an envelope of Mobile Air Conditioning Society (MACS) information.

Important: You must complete and mail the MVAC Certification Form and your technicians must be certified with the Environmental Protection Agency (EPA)to operate this equipment.

Power Up the Unit

1.Unwind the power cord from the handle, and plug it into a correct voltage outlet. See Figure

1..

2.Turn on the main power switch. The first time the unit is powered up, it displays the initial setup mode.

Select a Language – English Seleccionar Idioma – Espanol Selection Langue – Francais

The operator may choose to have prompts displayed in one of three languages: English, Spanish, or French.

1.Use the UP or DOWN arrow key to toggle through the choices of English, Spanish, or French. Refer to Figure 2.

2.Press START / YES to select the displayed language.

Select Operating Units

The operator may choose to have test results displayed in Imperial (lb., or lb. and oz.) or Metric (kg) units.

1.Use the UP or DOWN arrow key to toggle through the choices of IMPERIAL UNITS or METRIC UNITS.

2.Press START / YES to select the displayed operating unit choice.

CAUTION: R-134a systems have special fittings (per SAE specifications) to avoid cross-contamination with R-12 systems.. DO NOT adapt your unit for a different refrigerant — system failure will result..

Main

Power Switch

Power

Cord

Figure 1

Start / Yes	Stop / No
Button	Button

Arrow

Keys

Figure 2

560826 Rev. D, August 23, 2013

Setup

Set Tank Fill Level

The operator may either accept the unit’s pre-set default weight of 15 lbs. (6.8 kg) of refrigerant stored in the internal storage vessel (ISV),

or change the amount to accommodate the application.

The unit displays

LEVEL: 15.00 LBS.

ENTER TANK FILL LVL

LIMIT: 4 TO 17 LBS.

PRESS START / YES TO SAVE

1.Press START / YES to accept the default amount, or use the keypad to enter a desired amount and press START / YES.

Add Oil to the Vacuum Pump

CAUTION: The vacuum pump is shipped without oil in the reservoir.. Failure to add oil to the vacuum pump will damage the pump..

The unit displays

ADD 5 OZ OF NEW OIL

TO VACUUM PUMP

START TO CONTINUE

1.Remove the brass plug from the vacuum pump oil fill port. See Figure 3.

2.Attach the flexible tube/cap to the oil bottle; pour only five (5) ounces of vacuum pump oil into the fill port. Note: You will top off the oil in the next step as the vacuum pump is running.

3.Press and release the START / YES key. While the vacuum pump is running, slowly add oil until the level rises to the center of the reservoir’s sight glass.

4.Press the STOP / NO key to stop the vacuum pump, and install the brass plug in the fill port.

5.Press START / YES to continue.

Vacuum Pump

Fill Port

Sight

Glass

Fill Port

Figure 3

Sight Glass

CAUTION: The unit is programmed to run the setup procedure as outlined here.. To prevent personal injury, do NOT operate the unit at any other

time without the brass plug installed, because the vacuum pump is pressurized during normal operation..

Setup

Fill the Internal Storage Vessel (ISV)

1. Press START / YES, and the unit automatically runs a 5-minute vacuum to clear all internal air.

Note: The “burping” noise heard during this process indicates air is being purged from the system—this is normal.

2.After the vacuum pump shuts off, connect the fill hose to the liquid connector on a full source tank.

3. Open the source tank valve.

4.Install the source tank, and secure it to the unit (using the tank strap) in such a way that liquid refrigerant is supplied to the connection.

5.Press START / YES to begin filling the internal storage vessel. Add at least 8 lbs. (3.6 kg) of refrigerant to ensure enough refrigerant is available for charging.

This process takes 15–20 minutes. The unit stops when a sufficient amount of refrigerant has been transferred to the internal tank, or when the source tank is empty.

Press STOP / NO to pause. Press STOP
/ NO again to exit, or START / YES to	Figure 4
resume.	Side View
6. When the fill process is complete, press
STOP / NO to exit. The unit is ready for
operation.

Note: There is no need to calibrate the scale; it is calibrated at the factory.

Lowand

High-Side

Hoses

Power

Cord

Fill Hose

(connect to liquid line)

Source

Tank

Strap

560826 Rev. D, August 23, 2013

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