OPERATION & MAINTENANCE MANUAL RHS680 Refrigerant Handling System 4075 East Market Street York, PA 17402 800-468-2321 tech@rtitech.
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 . . . . . . . . . . . . .
STARTUP & SAFE OPERATION ' Do not use a damaged unit. Check for shipping damage and place a claim with carrier if damage is discovered. ' Return the Warranty Card to activate technical support service and warranty coverage. ' The RHS680 should not be operated or serviced by any person who has not read all the contents of this manual. ' This manual describes normal operation and maintenance for the RHS680.
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.
CONTROL PANEL PURGE CHART - 0 F & PSIG 0 F 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 R12 44 46 48 50 52 54 57 59 61 64 66 69 72 74 77 80 R134a 42 44 46 49 51 54 56 59 61 64 67 70 72 76 78 82 0 F 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 R12 83 85 88 92 95 98 102 105 108 112 115 118 123 127 130 135 R134a 85 88 92 95 97 104 107 110 114 118 123 127 130 135 140 145 0 F 96 98 100 102 104 106 108 110 112 114 116 118 120 R12 138 143 147 150 155 160 165 168 173 178 183 188 193 R134a 148 153
KEYPAD FUNCTIONS Scroll Key Press to scroll through function options or to increase numeric values shown on the display. Cursor Key Press to move flashing cursor on the display prior to numeric entries. Go Key Press to confirm data entry and continue. Stop Key Press to halt program sequence. Units Key Press to change unit of measure for weight displays. - CAUTION Always use fingers to operate keypad. Use of sharp objects will cause damage.
FIRST TIME USE OF THE RHS680 1. The RHS680 ships from the factory with all internal components in a vacuum. It should be pre-charged with refrigerant for optimum performance. The cylinder mounted in the RHS680 is used as the storage container for recycled refrigerant. This same refrigerant is then charged to the A/C System during a charge procedure. This cylinder must be left in the RHS680, as the weight scale is calibrated for this specific cylinder. 2.
START-UP 1. Turn Function Valve and Purge Valve on RHS680 to OFF. Connect yellow hose of gauge manifold to port on rear of RHS680. Close high and low valves on gauge manifold. Connect red and blue hoses to A/C system and open hose valves. 2. Connect power cord of RHS680 to properly grounded power source. Avoid using an extension cord. If necessary use a good condition, three wire grounded, #14 AWG or larger extension cord of the shortest possible length. 3.
RECOVER (RECYCLE) 1. Turn Function Valve on RHS680 to RECOVER. 2. Open high and low valves on gauge manifold. 3. The display will show the weight of refrigerant in the RHS680 cylinder and indicate the unit is recycling. 4. When the A/C system pressure is in a vacuum the display will show RECYCLE COMPLETE CHECK PRESSURES. Wait two minutes to see if the pressure in the A/C increases (due to liquid refrigerant vaporizing). The RHS680 will automatically begin recycling again if the pressure rises above zero. 5.
VACUUM 1. MAKE SURE THE GAUGE PRESSURES ARE ZERO OR LESS. If not, a recover procedure must be performed before starting the vacuum procedure. 2. Turn Function Valve on RHS680 to VACUUM. 3. Open high and low valves on gauge manifold. 4. The display will show the weight of refrigerant in the RHS680 cylinder and indicate the unit is vacuuming. 5. At the end of the desired vacuum time, press the stop key and close the high and low valves on the gauge manifold. 6. Turn Function Valve on RHS680 to OFF. CHARGE 1.
MAINTENANCE The RHS680 will provide many years of reliable service if properly maintained. Following is a checklist of items which will ensure the RHS680 performs at peak efficiency and presents an image to your customers that your shop performs high tech A/C service. 1. Use tool tray for storage of tools and accessory adapters. 2. Store gauge manifold and hoses properly when not in use. Avoid hanging hoses over the top of the unit. 3. Keep the exterior surfaces clean.
PARTS LIST - RHS680 Part Number Description 1 026-80077-00 Filter - Long 2 022-80013-00 Low Pressure Switch 3 360-81514-00 Expansion Valve Assy 4 026-80070-00 Accumulator 5 360-81356-01 Compressor 6 024-80037-00 Contactor 7 360-81428-00 DOT Cylinder 8 360-81547-01 Heat Belt 9 026-80069-00 Filter - Short 10 022-80015-02 High Pressure Switch 11 025-80304-00 Solenoid 12 360-80416-00 Fan Assy 13 360-80280-00 Condenser Assy 14 031-80000-00 Load Cell 15 022-80028-00 V
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