Panasonic U-8ME1E8 Installation Instructions Manual

Also see for U-10ME1E8: Instruction manual Service manual Operating instructions Installation instructions

Contents

Panasonic U-8ME1E8 Installation Instructions Manual Manual pdf 6 page image

5Precautions for Installation Using New Refrigerant1. Care regarding tubing1-1. Process tubing● Material: Use C1220 phosphorous deoxidized copper specified in JIS H3300 “Copper and Copper Alloy Seamless Pipes and Tubes.”For tubes of ø22.22 or larger, use C1220 T-1/2H material or H material, and do not bend the tubes.● Tubing size: Be sure to use the sizes indicated in the table below.● Use a tube cutter when cutting the tubing, and be sure to remove any flash. This also applies to distribution joints (optional).● When bending tubing, use a bending radius that is 4 times the outer diameter of the tubing or larger.CAUTIONUse sufficient care in handling the tubing. Seal the tubing ends with caps or tape toprevent dirt, moisture, or other foreign substances from entering. These substancescan result in system malfunction.Unit: mmMaterial OCopper tube Outer diameter 6.35 9.52 12.7 15.88 19.05Wall thickness 0.8 0.8 0.8 1.0 1.2Unit: mmMaterial 1/2 H, HCopper tube Outer diameter 22.22 25.4 28.58 31.75 38.1 41.28Wall thickness 1.0 1.0 1.0 1.1 over 1.35 over 1.451-2. Prevent impurities including water, dust and oxide from entering the tubing. Impurities can cause R410A refrigerant deteriorationand compressor defects. Due to the features of the refrigerant and refrigerating machine oil, the prevention of water and otherimpurities becomes more important than ever.2. Be sure to recharge the refrigerant only in liquid form.2-1. Since R410A is a non-azeotrope, recharging the refrigerant in gas form can lower performance and cause defects in the unit.2-2. Since refrigerant composition changes and performance decreases when gas leaks, collect the remaining refrigerant and rechargethe required total amount of new refrigerant after fixing the leak.