68 Section E- Refrigeration System
Equipment Needed for Evacuation & Recharging:
• Heated charging cylinder
• Standard 3-port manifold gauge set:
- 4 charging hoses
- Tee fitting with valve core stem removed (Robinair No. 40396)
- Hand shut-off valve (Robinair No.40380)
• Two stage vacuum pump
• Process tube adapter kit (Robinair No. 12458)
• Tubing cutter
• Pinch-off tool capable of making leak proof seal
• Complete brazing torch set
• Small 3-corner file
• Grit cloth or Scotch-Brite
• 45% silver solder and flux
Installing Evacuation and Recharging Equipment
1. Disconnect refrigerator from electrical supply.
2. If compressor was replaced, install correct sized process tube adaptor on
process tube. If compressor was not replaced, cut process tube with tubing
cutter leaving as much tube as possible and install correct size process tube
adaptor.
3. Install correct sized process tube adaptor on high-side process tube.
4. Attach refrigeration service gauge manifold to system in following order:
• Low-side (compound gauge) hose to suction side process tube adaptor.
• High-side (pressure gauge) hose to high-side process tube adaptor.
• Center port manifold hose before hand shut-off valve to charging cylinder.
• Center port manifold hose after hand shut-off valve to vacuum pump.
Evacuating System
WARNING
R-134A SYSTEMS ARE PARTICULARLY SUSCEPTIBLE TO MOISTURE CONTAMINATION
WHICH CAN ONLY BE PREVENTED BY EVACUATING THE SYSTEM FOR A MINIMUM OF
30 MINUTES TO ATTAIN A MINIMUM 29.9 INCH (500 MICRON OR LOWER) VACUUM.
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