Carrier 69NT40-541-306, Операция и обслуживание

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7–15 T-354
7.8.5 Installing the Components
1. Push pistons from the inside of the crankcase through the cylinders, being careful not to break the rings.
Place rods so that the chamfered side will be against radius of crankpins. Install the crankshaft and thrust
washer through the pump end of the compressor. En sure thrust washer is fitted on locating pin. Do not
damage main bearings. Bring rods in position against crank bearings.
2. Install the pump end thrust washer on the two dowel pins located on the bearing head (see Figure 7.9 .
CAUTION
!
Ensure that thrust washer does not fall off dowel pins while installing oil pump.
CAUTION
!
The set screw on the crankshaft must be removed for this type of oil pump (see Figure 7.9 ).
3. Install the bearing head assembly with a new gasket on the compressor crankshaft. Carefully push oil pump
on by hand, ensuring that the thrust washer re mains on the dowel pins. The tang on the end of the drive
engages the slot in the crankshaft, and the oil inlet port on the pump is aligned with the oil pickup tube in the
crankcase. The pump should mounted flush with the crankcase, and should be oriented with the oil pick up
tube and oil inlet port aligned as shown in
Figure 7.9 .
4. Align the gasket and install the eight cap screws in the mounting flange. Refer to Table 7–7 for applicable
torque values.
5. Install matching connecting rod caps Be sure rod is not bound and crankshaft will turn correctly as each set
of rod bolts is torqued.
6. Be sure key fits properly when installing rotor on shaft. Screw on equalizer tube and lock screw assembly
with lock washer and bend over tabs of lock washer. Assemble suction strainer to motor and cover, and bolt
cover to crankcase. Assemble valve plates and gaskets. Assemble cylinder heads and gaskets. Turn the
shaft by hand to see that it moves freely.
7. Install the oil suction screen, the oil suction screen hold down plate, and the bottom plate.
7.8.6 Compressor Oil Level
CAUTION
!
Use only Carrier Transicold approved Polyol Ester Oil (POE) - Castrol-Icematic SW20 compres-
sor oil with R-134a. Buy in quantities of one quart or smaller. When using this hygroscopic oil,
immediately reseal. Do not leave container of oil open or contamination will occur.
Checking the Oil Level in the Compressor
1.Operate the unit in cooling mode for at least 20 minutes.
2. Check the front oil sight glass on the compressor to ensure that no foaming of the oil is present after 20 min-
utes of operation. If the oil is foaming excessively after 20 minutes of operation, check the refrigerant system
for flood-back of liquid refrigerant. Correct this situation before performing step 3.
3. Turn unit off to check the oil level. The correct oil level range should be between the bottom to one-eighth
level of the sight glass. If the level is above one-eighth, oil must be removed from the compressor. To
remove oil from the compressor, follow step d in this section. If the level is below the bottom of the sight
glass, add oil to the compressor following step b below.
Adding Oil with Compressor in System
1. The recommended method is to add oil using an oil pump at the oil fill valve (see item 11, Figure 7.6 ).
2. In an emergency where an oil pump is not available, oil may be drawn into the compressor through the suc-
tion service valve.