Thermo King SB-210, Руководство пользователя

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Refrigeration Maintenance
105
Checking Compressor Oil
The compressor oil should be checked when there
is evidence of oil loss (oil leaks) or when
components in the refrigeration system have been
removed for service or replacement.
To check compressor oil level with an
ambient air temperature above 50 F (10 C):
Install a gauge manifold on the compressor.
Operate the unit on cool with a 20 psi (138 kPa)
minimum suction pressure and a 185 psi
(1275 kPa) minimum discharge pressure for 15
minutes or more.
After the unit has maintained the above conditions
for 15 minutes, observe the oil level. The oil
should be 1/4 to 1/2 up in the sight glass.
To check compressor oil level with an
ambient air temperature below 50 F (10 C):
Run the unit through a complete defrost cycle.
After completing the defrost cycle, run the unit on
cool for ten minutes. Observe the oil level. The oil
should be 1/4 to 1/2 up in the sight glass.
If the box is empty, you can run the unit on the
heat cycle instead of the defrost cycle.
NOTE: Use refrigeration compressor oil ONLY.
Polyol Ester P/N 203-513 is required for
R-404A.
To add compressor oil pump down the compressor
and equalize the pressure to slightly positive.
Disconnect the compressor oil filter return line
from the top of the compressor and add the oil.
Reattach the oil filter return line to the
compressor. Evacuate the compressor before
opening the service valves.
High Pressure Cutout Switch
(HPCO)
The HPCO is located on the compressor discharge
manifold. If the discharge pressure rises above
470 psig (3241 kPa), the HPCO opens the 8D
circuit, de-energizing the fuel solenoid. To test the
HPCO, rework a gauge manifold as shown in
Figure 92: “High Pressure Cutout Manifold” and
use the following procedure.
1. Connect the gauge manifold to the compressor
discharge service valve with a heavy duty,
black jacketed thick wall #HCA 144 hose with
a 900 psig (6204 kPa) working pressure
rating.
1. Sight Glass
Figure 91: Checking Compressor Oil
1
ARA115
1. Relief Valve (66-6543)
2. O-Ring (33-1015)
3. Adapter Tee Weather Head No. 552X3
Figure 92: High Pressure Cutout Manifold