Gree GC201808-III, Руководство по обслуживанию

Страница: 306 / 362

GREE GMV5 HR HEAT RECOVERY UNITS
302
Note:
The new compressor must be consistent with the faulty one in model.
Check the rubbers for oil separator, gas separator, and drying filter. If they are lost during
transportation, cover the parts with tape to keep the compressor dry and airtight inside.
Note:
Compressor lubricant must be kept completely airtight. Hitachi compressors use special
lubricant FVC68D whose moisture absorption capability is high. Requirements on air-tightness of these
compressors are higher.
(2) Prepare other materials.
1) Prepare nitrogen. Prepare enough nitrogen. They will be used during welding. Nitrogen
pressure should be 2.0 MPa at least.
2) Prepare welding rods. In addition to ordinary welding rods, you should also prepare special
welding rods (containing 5% or more silver). Compressors’ inlets and outlets are made of
copper plated steels, which require special welding rods and materials.
3) Prepare gases for welding. Oxygen and acetylene of proper amount should be determined
with consideration of actual welding positions. Try to finish the welding task once. Avoid
repeated welding.
4) Prepare tools, including hexagon, diagonal pliers, combination pliers, needle nose pliers,
multimeter, pressure gauge, Phillips screwdriver, flathead screwdriver, wrenches (at least
two), PVC insulation tape, and tielines (multiple).
Step 8: Install a new gas/liquid separator.
Note: If a faulty compressor needs replacement, the gas/liquid separator needs replacement as well.