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<strong>Operating</strong> Instructions EVACUATING THE A/C SYSTEM WARNING Always wear safety goggles when working with refrigerant. Use only authorized refillable refrigerant tanks. Read and follow all warnings at the beginning of this manual before operating the unit. This station is UL-certified as a single-pass unit. During evacuation, refrigerant is automatically recycled to assure recharging with the cleanest possible refrigerant in no additional time. 1. With the 96” (244 cm) high side and low side hoses connected to the A/C system, open both manifold valves on the control panel. 2. Open both the GAS (vapor) valve and the LIQUID valve on the tank. 3. To program the length of evacuation time, press SHIFT/RESET until the display shows that the unit is in the VACUUM mode. 4. For your convenience, a default vacuum time is preprogrammed to appear on the digital display at start-up. If the default time is correct, proceed to Step 5. You can override this default setting by entering a different length of time in both minutes and seconds. Enter the required time by pressing the appropriate number keys, then press ENTER. The display shows the time in minutes. 5. Press VACUUM to start the vacuum pump. If the message "U-HI" appears, you have 25 psi or greater of pressure at the inlet. You must recover that pressure to continue. If necessary, press RECOVER. The digital display counts down the remaining evacuation time in minutes and seconds. Recycling begins automatically five (5) seconds after the vacuum pump starts, and the “RECYCLE” message illuminates to indicate the unit is recycling refrigerant. Non-condensible gases (mostly air) are automatically vented from the tank during the recycling process, sometimes producing an audible pressure release (a hissing sound). This is a normal function. 6. The vacuum sequence continues for the programmed length of time, then displays the “CPL” message to indicate that evacuation is complete. 7. Pressing SHIFT/RESET at this point moves you to the charging process. IMPORTANT! You should evacuate for at least 15 minutes for adequate moisture and contaminant removal. IMPORTANT! If the vacuum pump has run for 10 or more hours without an oil change, the message “OIL” flashes on the display. Change the pump oil following the procedures in the MAINTENANCE INSTRUCTIONS. Series 17700A/17701A/34700/34701/34704 Enviro-Charge Units 21
<strong>Operating</strong> Instructions Option A You can recycle refrigerant only (without pulling a vacuum) for an indefinite period of time by pressing SHIFT/RESET and RECYCLE at the same time. To cancel this operation, again press SHIFT/RESET. Option B If you require vacuum only, press SHIFT/RESET and ENTER at the same time, then press 1. Run the vacuum pump as long as required, then press 1 or SHIFT/RESET to cancel. Option C You can automatically charge refrigerant after the vacuum cycle: 1. Press SHIFT/RESET and ENTER at the same time. The display will be blank. 2. Press 4, the display will show "AUTOMATIC", "VACUUM" and either "00" or "11." "00" indicates a disabled auto-charge and "11" indicates an enabled auto-charge. 3. Press ENTER to shift between enabled and disabled auto-charge. Press SHIFT/RESET to lock in mode choice to memory. INST0483 Diagram of Control Panel SHIFT/RESET ENTER VACUUM 22 © 1998 Robinair, SPX Corporation
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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: Operating Instructions CAUTION! Dra
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 and 34: Maintenance Instructions UL CIRUIT
Page 35 and 36: Maintenance Instructions Filter- Dr
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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