MAHLE RTI RRC770A User Manual

OPERATION

MANUAL

RRC770 - UNDP

Refrigerant Management Center

(Convertible For Use With R12 or R134a)

RTI Technologies, Inc.
10 Innovation Drive
York, Pennsylvania 17402 USA
Phone: [phone]
Fax: [phone]
www.rtitech.com

035-81297-00

RTI

CONVERTIBLE

RECYCLING MACHINE

This Recycling Machine was
manufactured by RTI in compliance
with all applicable Underwriters
Laboratories (UL) and Society of
Automotive Engineers (SAE) Standards
and Specifications for Refrigerant
Recycling Equipment.

Your machine is initially configured to
recycle R12 or R134a.

An RTI Retrofit Kit is available for field
conversion of this machme to recycle
the alternate refrigerant for which it is
now configured. This kit includes
complete instructions, labels, filters,
hoses with service couplers, and
special tools required to make the
conversion.

Once converted by an RTI Authorized
Representative, a new Serial Label
(included in the kit) will be affixed to the
machine. Ths Serial Label will certify
that the machine is then in compliance
with all SAE and UL Standards and
Specifications for Equipment to recycle
the alternate refrigerant.

TABLE OF CONTENTS

RRC770

Before Using ................................... 1

Safety Precautions .............................. 2

Pre-Charging................................... 4

Recycle Mode .................................. 6

Oil Drain & RTI Rapid Air Purge System Procedure ..... 8

Deep Vacuum & Dehydration ...................... 9

Hose Evacuation Procedure ....................... 10

Charge Mode .................................. 11

Scheduled Maintenance .......................... 13

Combo Filter Maintenance ........................ 13

Problems & Solutions ............................ 14

Flow Diagram .................................. 16

Circuit Diagram ................................. 17

Parts List ...................................... 18

BEFORE USING THE RRC770

Check for any shipping damage.

DO NOT USE A DAMAGED UNIT.

The RRC770 should not be operated or serviced by any person who has not read all
the contents of
one

of the limitations noted herein can result in serious injury and/or property damage.

These general instructions describe normal operation and maintenance situations
encountered with the RRC770. The instructions should not be interpreted to anticipate
every possible contingency.

It

is the responsibility of the owner/user to operate the RRC770 in accordance with all

specifications

this manual. Failure to read and comply with these instructions or any

and laws which may apply.

The following pages
precedence over any specified rule listed herein, however, is the most important rule
of all:

contain rules for safe operation of the RRC770. Taking

"USE COMMON SENSE"

A few minutes spent reading these instructions can make an operator aware of

dangerous practices
others.

A regular schedule
maintained with special attention given to Hoses and Filters.

to avoid and precautions to take for his own safety and the safety of

of inspection of the RRC770 should be established and records

Page 1

SAFETY PRECAUTIONS

! Recover, Recycle, and Charge only the refrigerant for which the machine is configured.

! Wear safety glasses and protective gloves. Refrigerant has a very low boiling point and

can cause frostbite.

! Follow the RRC770 operating procedures sequentially to avoid prematurely

disconnecting hoses or opening valves which may release refrigerant to the
atmosphere.

! Do not expose the RRC770 to moisture or operate in wet areas.

! Use the RRC770 in locations with mechanical ventilation that provides at least four air

changes per hour.

! Hoses used with the RRC770 must have shutoff devices within 12 inches of the

connection point to the system being serviced to minimize the introduction of Non­condensable Gas (Air) into the RRC770 and the release of refrigerant when being
disconnected.

! Disconnect power before performing any maintenance or service on the RRC770.

! Avoid using an extension cord with the RRC770. If necessary, use a good condition,

UL listed, 3-wire grounded, #14 AWG extension cord of the shortest possible length.
Connect the RRC770 to a properly protected, grounded receptacle. Do not over load
the circuit.

! Do not allow the RRC770 to remain unattended in the Charge Mode with power On.

The Internal Cylinder Heater will be energized creating a high pressure condition.

NEVER TURN THE CYLINDER UP-SIDE-DOWN.

DO NOT CONNECT THE RRC770 TO THE LIQUID SIDE OF ANY
A/C SYSTEM WITH A CAPACITY GREATER THAN 4 LBS.

REFRIGERANT IN A/C SYSTEMS HAVING LARGER CAPACITIES
MUST BE RECOVERED FROM THE VAPOR SIDE ONLY.

NEVER CONNECT THE RRC770 TO THE LIQUID PORT OF A
CYLINDER OF REFRIGERANT TO FILL THE RRC770 INTERNAL
CYLINDER.

FAILURE TO FOLLOW THE ABOVE MAY CAUSE THE RRC770
COMPRESSOR TO FAIL AND VOID THE WARRANTY.

Page 2

CAUTION

Avoid breathing refrigerant or lubricant vapor or mist.

Exposure may irritate eyes, nose and throat.

If accidental system discharge occurs, ventilate work area before resuming service.

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

Special Considerations with R134a

R134a has been shown to be nonflammable at ambient temperature and atmospheric
pressure. However, recent tests under controlled conditions have indicated that, at
pressures above atmospheric and with air concentrations greater than 60% by volume,
R134a can form combustible mixtures.

While it is recognized that an ignition source is also required for combustion to occur, the
presence of combustible mixtures is a potentially dangerous situation and should be
avoided.

Under no circumstances should any equipment be pressure tested or leak tested with
Air/R134a mixtures. Do not use compressed air (shop air) for leak detection in R134a
systems.

Page 3

PRE-CHARGING THE RRC770

A/C Systems requiring service often do not have a full charge of refrigerant. To avoid
unnecessary repositioning of hoses it is recommended that the RRC770 be pre-charged
until about 3 pounds of liquid refrigerant can be seen in the Internal Cylinder Sight Glass.
The Sight Glass is visible through a slotted opening on the right side of the RRC770.

Figure 1 - Pre-charging

To pre-charge the RRC770, refer to Figure 1 and follow these steps:

1. Turn the Main Power Switch to Off.

2. Connect the yellow hose from the VAPOR port of a cylinder of refrigerant to the
RRC770 Access Port on the rear of the machine.

Observe that the embossed marking on the cylinder knob says VAPOR or GAS. Do
not rely on color coding of valve knobs.

DO NOT TURN THE CYLINDER UP-SIDE-DOWN.

INTRODUCTION OF LIQUID INTO THE RRC770 MAY DAMAGE
THE COMPRESSOR AND VOID THE WARRANTY.

Page 4