OPERATION & MAINTENANCE MANUAL RHS780 Refrigerant Handling Station RTI Technologies, Inc. 4075 East Market Street P.O. Box 3099 York, Pennsylvania USA 17402 717-840-0678 (Ext. 259) Web: www.rtitech.com E-mail: 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 High Side Oil Charge Bottle Fill Port Anti-Blowback Valve New Refrigerant To Fill Port High Low Charge Switch Low Side Oil Charge Bottle Oil Drain Re-pressurization Switch Oil Drain Bottle Vacuum Pump Page 4
WEIGHT= L B FILLING THE CHARGE CYLINDER XX.X AUTOMATIC? 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 ON. Note: The RHS780 uses 37 lbs (17 Kg) of refrigerant when Filling the first time.
WEIGHT= XX.X LB AUTOMATIC? 5 > WEIGHT= XX.X LB RECYCLE? RECOVER/RECYCLE 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch ON. 2. Attach the Red and Blue Hoses to the A/C System per the vehicle manufacturer's instructions, open the Red and Blue Hose Valves. 3. Using the Keypad, press the “Up Arrow” key one time to display “WEIGHT= XX.X LB” “RECYCLE? 5” and press the ENTER key. The Display 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 for 5 seconds and then release it. 2.
WEIGHT= XX.X AUTOMATIC? LB 5 >> WEIGHT= XX.X VACUUM? LB DEEP VACUUM 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch ON. 2. Attach the Red and Blue Hoses to the A/C System per the vehicle manufacturer's instructions and open the Red and Blue Hose Valves. 3. Using the Keypad, press the “Up Arrow” key two times to display “WEIGHT= XX.X LB” “VACUUM? 5” and press the ENTER key. The Display will read “ENTER VACUUM” “TIME XX MIN 5”.
WEIGHT= XX.X LB AUTOMATIC? 5 >>> WEIGHT= XX.X LB CHARGE? CHARGING 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch ON. 2. Attach the Red and Blue Hoses to the A/C System per the vehicle manufacturer's instructions and open the Red and Blue Hose Valves. 3. Determine the refrigerant capacity of the A/C System to be charged. 5 Note: 1 oz = 0.02835 Kg & 1 Lb = 0.45359 Kg 4. Using the Keypad, press the “Up Arrow” key three times to display “WEIGHT= XX.
WEIGHT= XX.X LB AUTOMATIC? 5 ENTER RECYCLE HOLD TIME MIN XX TIME 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch ON. 2. Attach the Red and Blue Hoses to the A/C System per the vehicle manufacturer's instructions and open the Red and Blue Hose Valves. 3. Determine the refrigerant capacity of the A/C System to be charged. 5 >< ENTER ENTER AUTOMATIC Note: 1 oz = 0.02835 Kg & 1 Lb = 0.45359 Kg 4.
WEIGHT= XX.X COMPRESSOR LB OFF The Display 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 Pressure Gauge. The Display will read “WEIGHT= XX.
WEIGHT= XX.X LB AUTOMATIC? 5 >>>>> ENTER WEIGHT= XX.X Accessing Stored Data 1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch ON. 2. Using the Keypad, press the “Up Arrow” key five times to display “WEIGHT= XX.X LB” “SETUP? 5” and then press the ENTER key. The Display will read “FILTER HOURS=” “XX.X HOURS”. LB SETUP? 5 See the Filter Maintenance section of the manual, Page 14, for the procedure to change the filters.
WEIGHT= XX.X AUTOMATIC? LB 5 >>>>> ENTER WEIGHT= XX.X SETUP? LB XX.X Remove the front panel of the RHS780. 2. Turn the Main Power Switch 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 [C] left of the LCD. 3. Remove the plastic Calibration Tool [A] from the lower mounting hole of the Circuit Board Cover [C] next to the access hole to the Calibration Switch [B]. 4.
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 vacuum pump sight glass on the rear 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... Clean the Condenser to maintain high efficiency performance of the RHS780.
PARTS IDENTIFICATION Front View 1 2 3 P/N 14 13 4 1 024-80105-01 Circuit Board 120V 2 024-80040-00 Rocker Switch SPDT (on-on) Amber (125V) 3 026-80065-03 Gauge 30"-120 Psig 1/4 MFL 3.5" 4 360-81307-00 High Pressure Switch 120V 5 022-80024-00 D/P Switch R134A 6 360-81292-00 Solenoid w/MOV Assy 120V 7 360-81895-00 Cylinder Assy 50 lbs.
PARTS IDENTIFICATION (RHS780) Rear View P/N 1 5 2 1 026-80069-00 Combo Filter 3/8 Flare (Short) 2 026-80240-00 026-80241-00 Filter In-Line (R12) Filter In-Line (R134a) 3 026-80208-00 Oil Charge Bottle Assy 026-80208-01 Oil Charge Bottle Only 4 024-80066-00 Rocker Switch SPDT (ON-ON) Visi-Red 5 026-80077-00 Combo Filter 3/8 Flare (Long) 6 024-80035-00 Rocker Switch SPST (MOM-ON) non-lighted 7 026-80207-00 Oil Drain Bottle Assy 026-80207-01 Oil Drain Bottle Only 3 4 DESCRIPTION
Solenoid, Pressure Switch & Contactor Identification Page 17
