Ingersoll-Rand 900829, Руководство по обслуживанию

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Refrigeration Maintenance
46
3. Charge with 6.0 to 7.0 lb (2.7 to 3.2 kg) of
refrigerant.
4. Operate at a low speed (600 to 800 rpm) for 2
hours, or until the compressor oil level reaches
a minimum allowable level, whichever occurs
first. Drain the collected oil from the oil
separator as it fills, taking care to not allow
any collected oil to recirculate.
5. Prepare the original compressor that was
removed from the unit (or a replacement) by
draining out any existing oil and replacing the
oil with the amount of oil shown in the
Specifications chapter.
6. Install the original compressor (or its
replacement), and proceed with the manual
evacuation and refrigerant charging
procedure.
Refrigeration System Checks
1. Connect a gauge manifold set to the suction
and discharge service ports on the engine
driven compressor.
2. Check the system pressures and the refrigerant
flow in cool, heat (Model 30 and 50 units
only), and defrost. The suction and discharge
pressures should be within the normal ranges
for a standard unit. Check the temperatures of
the refrigeration lines by hand to check the
refrigerant flow. See the individual test for a
component if you suspect it is not functioning
properly.
Cleanup Procedure for Small
Truck Units
NOTE: If a Van Steenburgh reclaimer is
available, do not use this procedure. Follow
procedure described in Service Bulletin T&T
134.
Tools Required
• Motor-driven TK 214 “Flushing Compressor”
• Suction Line Filter (P/N 204-498 with Filter
P/N 66-2988)
• Pipes (In Place of Oil Separator, Check Valve,
Oil Separator and Standby Compressor)
Clean-up Procedure
1. Make sure all hose routing is correct.
2. Make sure that the oil trap is correctly
installed.
3. Recover the contaminated refrigerant from the
system.
4. Remove the lines from the compressors
(engine driven and standby).
5. Flush each compressor using the flushing
compressor and an HFC refrigerant. (Always
recover the refrigerant before disconnecting
the flushing compressor.)
6. Remove the check valve (or check valve seats)
from system to ensure flow in all directions.
7. Remove the oil separator and install a
connecting pipe.
1. Remove Internal Parts From Expansion Valve
2. Disconnect and Cap (If So Equipped)
3. Replace Drier With Tube
4. Discharge Line
5. Flushing Compressor
6. Suction Line
7. Suction Oil
8. Recovered Oil
Figure 27: Connecting Flushing
Compressor to Unit