MAHLE RTI RHS680 User Manual

OPERATION

&

MAINTENANCE

MANUAL

RHS680

Refrigerant Handling System

4075 East Market Street

York, PA 17402

800-468-2321

[e-mail]

Manual P/N 035-80912-00

TABLE OF CONTENTS

Startup & Safe Operation ............ 1

Introduction to the RHS680 ........... 2

Control Panel ...................... 3

Keypad Functions .................. 4

First Time Use of the RHS680......... 5

Start-Up .......................... 6

Recover (Recycle) .................. 7

Purge Air - Drain Oil ................ 7

Vacuum .......................... 8

Charge ........................... 8

Maintenance ...................... 9

Parts Lists ........................10

R134a Connection to Cylinder ........11

TECHNICAL SUPPORT

RTI Technologies has a staff of qualified technicians
available for technical support. We also maintain one of
the largest networks of Service Centers throughout the
world for unit repairs and maintenance. Our web site is
constantly updated to provide the latest information
concerning all the products we manufacture.

RTI Technologies, Inc.

York, Pennsylvania USA

800-468-2321
717-840-0678

www.rtitech.com

STARTUP & SAFE OPERATION

9 Do not use a damaged unit. Check for shipping damage and place a claim with carrier if damage

is discovered.

9 Return the Warranty Card to activate technical support service and warranty coverage.

9 The RHS680 should not be operated or serviced by any person who has not read all the contents

of this manual.

9 This manual describes normal operation and maintenance for the RHS680. Failure to read and

comply with these instructions or any one of the limitations noted herein can result in serious injury
and/or property damage. The instructions should not be interpreted to anticipate every possible
contingency.

9 It is the responsibility of the owner/user to operate the RHS680 in accordance with all laws and

specifications which may apply.

9 Recover (recycle) and charge only the refrigerant for which the RHS680 is configured.

9 Avoid breathing refrigerant or lubricant vapor. Exposure may irritate eyes, nose and throat.

Ventilate work area if accidental system discharge occurs.

9 Wear safety glasses and protective gloves. Refrigerant has a very low boiling point and can cause

frostbite.

9 Follow the RHS680 operating procedures sequentially to avoid prematurely disconnecting hoses

or opening valves which may release refrigerant to the atmosphere.

9 Do not expose the RHS680 to moisture or operate in wet areas.

9 Use the RHS680 in locations with ventilation that provides at least four air changes per hour.

9 Hoses must have shutoff devices within 12 inches of the connection point to the A/C to minimize

the introduction of air into the RHS680 and the release of refrigerant when being disconnected.

9 Avoid using an extension cord with the RHS680. If necessary use a good condition, three wire

grounded, #14 AWG or larger extension cord of the shortest possible length.

9 Disconnect power before performing any maintenance or service on the RHS680.

9 Do not connect the red or blue hoses to the liquid port of a cylinder of refrigerant to fill the charge

cylinder. Doing so may cause the compressor to fail and void the warranty.

9 Do not connect the RHS680 to the liquid side of any A/C with a capacity greater than 4 lbs.

Refrigerant in A/C Systems having larger capacities must be recovered from the vapor side only.

Special Considerations with R134a

R134a has been shown to be nonflammable at ambient temperature and atmospheric pressure.
However, tests under controlled conditions have indicated that at pressures above atmospheric and
with air concentrations greater than 60 percent 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 and R134a
mixtures. Do not use compressed air for leak detection in R134a systems.

Page 1

INTRODUCTION TO THE RHS680

The RHS680 is a complete refrigerant management center featuring state-of-the-art electronic control
with digital weight scale measuring of refrigerant. Operation of the RHS680 is intuitive and very easy
to master.

Following is an overview of the operation and features of the RHS680:

RECOVER (RECYCLE)

Refrigerant is recovered from the A/C, impurities (particulates, oil, moisture and air) are removed
and the refrigerant is stored in the internal cylinder. The recovery process stops when the RHS680
senses an 8 InHg vacuum at the A/C. Wait for at least two minutes and watch the pressure gauges
to determine if there is an increasing pressure. If pressure in the A/C rises during this time period
due to vaporization of residual liquid refrigerant, the RHS680 will restart to recover this refrigerant.
When the RHS680 stays off continually for at least two minutes, the recovery procedure is
complete.

VACUUM

A deep vacuum should be drawn on the A/C to remove air, moisture and refrigerant dissolved in
the oil. A deep vacuum is especially important if the A/C was opened for replacement of
components.

PURGE AIR - DRAIN OIL

Excess air and recovered oil must be removed from the RHS680 after all refrigerant has been
recovered from the A/C. Temperature and pressure readings are examined and air is released
using the purge valve. Oil is drained into the oil drain cup for measuring to determine the need to
replenish the A/C.

CHARGE

Refrigerant is charged into the A/C by weight. The amount to be charged is entered and the
RHS680 automatically charges the refrigerant into the A/C.

1 Keypad

2 Function Valve

3 Purge Chart

4 Gauge Manifold

5 Tool Tray

6 Purge Gauge

7 Purge Valve

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