OPERATION & MAINTENANCE MANUAL RHS780 Refrigerant Handling Station 4075 E. Market Street P.O. Box 3099 York, PA (USA) 17402 800-468-2321 (Ext. 259) http://www.rtitech.com tech@rtitech.
TABLE OF CONTENTS RHS780 Before Using the RHS780 . . . . . . . . . . . . . . . . . . . . 2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Using the RHS780 . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Filling the Charge Cylinder . . . . . . . . . . . . . . . . . . . . 5 Recover/Recycle . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Draining Recovered Oil . . . . . . . . . . . . . . . .
BEFORE USING THE RHS780 Check for any shipping damage. Place a claim with carrier if damage is discovered. DO NOT USE A DAMAGED UNIT. Complete and return the Warranty Card to activate technical support service and warranty coverage. These general instructions describe normal operation and maintenance situations encountered with the RHS780. 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.
USING THE RHS780 Note: The purpose of this discussion is to familiarize the user with the features and functions of the RHS780 Refrigerant Handling Station. The procedures discussed in this manual assume that the RHS780 has been set up in accordance with the figures which are referred to and that the RHS780 has been connected to the proper power supply. This manual does not illustrate correct A/C service but rather how to correctly use the RHS780.
SETUP (1) Low Pressure Gauge (2) Keypad (3) Main Power Switch (5) High Pressure Gauge (6) Display (7) Attention Light (9) Oil Charge Bottle {Low Side} (10) High-Low Charge Selector Switch (11) Fill Port (12) Yellow Hose with Anti-Blowback Valve (13) Blue Hose {Low Side} (14) Red Hose {High Side} (15) Refrigerant Cylinder (16) Oil Charge Bottle {High Side} (17) Oil Drain Re-pressurization Switch (18) Oil Drain Bottle January 19, 2002 Page 4
WEIGHT= L B FILLING THE CHARGE CYLINDER XX.X AUTOMATIC? 5 >>>> WEIGHT= FILL XX.X LB CYLINDER? 5 Note: For large capacity or multiple A/C Systems where recharge will NOT be done between successive recoveries, it may be desirable to skip this procedure. 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3) ON. Note: The RHS780 uses 22 lbs (10 Kg) of refrigerant when Filling the first time.
WEIGHT= L B RECOVER/RECYCLE XX.X AUTOMATIC? 5 > WEIGHT= XX.X LB RECYCLE? 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3) ON. 2. Attach the Red (14) and Blue (13) Hoses to the A/C System per the vehicle manufacturer's instructions, open the Red and Blue Hose Valves. 3. Using the Keypad (2), press the “Up Arrow” key one time to display “WEIGHT= XX.X LB” “RECYCLE? 5” and press the ENTER key. The Display (6) will read “RECYCLE HOLD” “TIME XX MIN 5”.
DRAINING RECOVERED OIL Oil is separated from the recovered refrigerant and MUST be removed following EACH Recover/Recycle procedure to determine the amount (if any) necessary to add into the A/C System as follows: Note: The RHS780 must be connected to power source. Draining Recovered Oil may be done while the RHS780 Vacuum Pump is ON. 1. Setup the RHS780 as shown on Page 4 and press and hold the Oil Drain Repressurization Switch (17) for 5 seconds and then release it. 2.
WEIGHT= XX.X L B DEEP VACUUM 5 AUTOMATIC? >> WEIGHT= XX.X LB 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3) ON. 2. Attach the Red (14) and Blue (13) Hoses to the A/C System per the vehicle manufacturer's instructions and open the Red (14) and Blue (13) Hose Valves. 3. Using the Keypad (2), press the “Up Arrow” key two times to display “WEIGHT= XX.X LB” “VACUUM? 5” and press the ENTER key. The Display (6) will read “ENTER VACUUM” “TIME XX MIN 5”.
WEIGHT= L B CHARGING XX.X 5 AUTOMATIC? >>> WEIGHT= XX.X LB 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3) ON. 2. Attach the Red (14) and Blue (13) Hoses to the A/C System per the vehicle manufacturer's instructions and open the Red (14) and Blue (13) Hose Valves. 3. Determine the refrigerant capacity of the A/C System to be charged. 5 CHARGE? Note: 1 oz = 0.02835 Kg & 1 Lb = 0.45359 Kg 4.
WEIGHT= L B AUTOMATIC XX.X AUTOMATIC? 5 ENTER RECYCLE HOLD TIME MIN XX TIME Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3) ON. 2. Attach the Red (14) and Blue (13) Hoses to the A/C System per the vehicle manufacturer's instructions and open the Red (14) and Blue (13) Hose Valves. 3. Determine the refrigerant capacity of the A/C System to be charged. 5 >< ENTER ENTER 1. Note: 1 oz = 0.02835 Kg & 1 Lb = 0.45359 Kg 4.
WEIGHT= L B AUTOMATIC (continued...) XX.X COMPRESSOR OFF The Display (6) will read the “WEIGHT= XX.X LB” “COMPRESSOR ON”. The RHS780 will recover and recycle refrigerant from the A/C System and automatically cycle OFF when a vacuum is sensed. This vacuum level can be seen on the Low (1) Pressure Gauge. The Display (6) will read “WEIGHT= XX.
WEIGHT= XX.X L B Accessing Stored Data 5 AUTOMATIC? >>>>> ENTER WEIGHT= XX.X 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3) ON. 2. Using the Keypad (2), press the “Up Arrow” key five times to display “WEIGHT= XX.X LB” “SETUP? 5” and then press the ENTER key. The Display (6) will read “FILTER HOURS=” “XX.X HOURS”. LB 5 SETUP? See the Filter Maintenance section of the manual, Page 14, for the procedure to change the filters.
WEIGHT= XX.X AUTOMATIC? L B Setting Over Charge Amount 5 >>>>> ENTER WEIGHT= XX.X LB 5 SETUP? 1. Remove the front panel of the RHS780. 2. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3) ON. Refer to the figure below to locate the access hole to the Calibration Switch (B) which is on the underside of the Circuit Board Cover ©) left of the LCD. 3.
SCHEDULED MAINTENANCE DAILY... Check the oil level in the Vacuum Pump while the pump is running. The Vacuum Pump Oil Level Sight Glass is visible through a hole in the Lower Rear Panel of the RHS780. The oil level should be at the “half-way” point of the glass. If oil is not visible call Technical Support at 800-468-2321 extension 259. MONTHLY... Check the oil level in the Compressor while the motor is not running.
PARTS IDENTIFICATION Rear View P/N 1 360-81292-01 DESCRIPTION Solenoid MOV Sub-Assy 230V 2 025-80314-04 Contactor Varistor 201-250 VAC/DC January 19, 2002 3 024-80037-01 Contactor ½ HP (220V) 3NC/1NC 4 024-80035-00 Rocker Switch SPST (mom-on) Non-lighted 5 360-80369-02 D/P Switch R134a 6 360-81439-00 Condenser Assy 7 022-80050-01 Low Pressure Switch 3psig-15 In-Hg SPDT 8 360-81447-00 Cylinder Assy 30 lbs.
PARTS IDENTIFICATION Front View P/N 1 January 19, 2002 DESCRIPTION Filter In-Line 026-80240-00 (for R12 Machine) 026-80241-00 (for 134a Machine) 2 026-80077-00 Combo Filter 3/8 Flare (Long) 3 026-80070-00 Accumulator Assy 4 022-80110-00 Valve Automatic Expansion 3/8 MFL x 3/8 MFL 5 360-81357-01 Compressor Assy 780 220V 6 026-80069-00 Combo Filter 3/8 Flare (Short) 7 022-80046-01 High Pressure Switch 220v 8 026-80229-00 Pump Vac 7 CFM Page 16
PARTS IDENTIFICATION Top Panel P/N 1 024-80040-01 Rocker Switch SPDT (onon) Amber (250V) 2 024-80078-02 Circuit Board 230V 3 026-80065-03 Gauge 30"-120 Psig 1/4 MFL 3.5" 4 025-80046-00 Terminal RCPT 025-80127-01 Clear Bulb Bayonet Base 220V 025-80191-00 5 January 19, 2002 DESCRIPTION 026-80071-03 Lens Assembly Yellow Gauge 0-500 Psig MFL 3.
