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REPLACING THE FILTER-DRIER The filter-drier on this unit is designed to trap acid and particulates and is formulated to remove water from the refrigerant. You must change the filter-drier to assure adequate moisture and contaminant removal. Typically, you can recycle up to 300 pounds (136 kilograms) of R-134a or 600 pounds (272 kilograms) of R-12 between filter changes. To help you know when you’ve reached that point, the unit displays the “CH-F” warning message, prompting you to change the filterdrier. Once the “CH-F” message displays, you can: • Bypass the filter replacement routine: Press HOLD/CONT, and resume operation to complete a procedure before changing the filterdrier. Maintenance Instructions CAUTION! For best results, use Robinair filterdriers (part no. 34724). All performance tests and claims are based on using this specially-blended filter-drier. Use of another may affect performance results. INST0477 Diagram of Filter-Drier • Start the filter changeout routine: 1. If they are open, close both manifold valves. 2. Open the oil drain valve and make certain all oil has been drained, then close the valve. Remove oil drain bottle and dispose of used oil in accordance with all local and state regulations. 3. Connect the blue low side hose to the oil drain port. Open the oil drain valve. On 34700/34700 Series, open the valve located at the end of the low side hose. 4. Open the low side valve on the control panel. 5. Press SHIFT/RESET and FILTER at the same time to recover all the remaining refrigerant from the low side of the unit. The display shows the messages “FIL,” “AUTOMATIC” and “RECOVER.” When all of the refrigerant has been removed, the messages change to “FIL” and “HOLD” to indicate the unit is waiting for the filter replacement. Series 17700A/17701A/34700/34701/34704 Enviro-Charge Units 31
Maintenance Instructions Filter- Drier 6. When all of the refrigerant has been recovered, remove the filter-drier by unscrewing it from the manifold block. Dispose of the used filter-drier properly. 7. Remove the cap from the filter-drier, then install the new filter-drier. Tighten to 120 in. lbs. INST0479 8. Press HOLD/CONT. The vacuum pump starts automatically and runs for five minutes before shutting off. The messages on the digital display change to “FIL” and “VACUUM.” 9. After the vacuum pump shuts off, close the oil drain valve. Remove the low side hose from the oil drain port and reinstall the oil drain bottle. NOTE: 34700/34701/34704 Series units use special fittings at the ends of the charging hoses. 17700A/17701A Series units use standard ¼" SAE flare fittings. 1 2 3 Diagram of Oil Injection System 1. Oil Drain Port 2. Oil Drain Valve 3. Low Side Hose Valve (34700/34701/34704 Series Only) 32 © 1998 Robinair, SPX Corporation
Page 1 and 2: ○ ○ ○ ○ ○ ○ ○ ○ ○
Page 3 and 4: CONVERSION TABLE OZ. LBS. 0.5 0.03
Page 5 and 6: Introduction This manual contains i
Page 7 and 8: Set Up Instructions Low Side Gauge
Page 9 and 10: Set Up Instructions 9. While the pu
Page 11 and 12: Set Up Instructions IMPORTANT! The
Page 13 and 14: Operating Guidelines USING THE CONT
Page 15 and 16: Operating Guidelines Segment A —
Page 17 and 18: Overview This overview is designed
Page 19 and 20: Operating Instructions OPERATING TI
Page 21 and 22: Operating Instructions IMPORTANT! R
Page 23 and 24: Operating Instructions CAUTION! Dra
Page 25 and 26: Operating Instructions Option A You
Page 27 and 28: Operating Instructions IMPORTANT! Y
Page 29 and 30: Operating Instructions CORRECTING A
Page 31 and 32: Maintenance Instructions CALIBRATIN
Page 33: Maintenance Instructions UL CIRUIT
Page 37 and 38: Maintenance Instructions Diagram of
Page 39 and 40: Troubleshooting Tips RECOVERY OPERA
Page 41 and 42: Troubleshooting Tips ERROR/MESSAGE
Page 43 and 44: Replacement Parts List Series Serie
Page 45 and 46: Wiring Diagram J4 1 2 3 4 5 6 J3 1

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