Refrigeration System
| Compressor | ZMD27KVE-TFD, Scroll | |
| Refrigerant Charge | 5.2 Kg (11.4 lb.) R-134a | |
| Compressor Oil Capacity |
Note When the compressor is removed
from the unit, oil level should be noted or the oil removed from the
compressor should be measured so that the same amount of oil can be
maintained in the replacement compressor.
|
1.77 liter (60 oz.) |
| Compressor Oil Type |
Note Do not use or add standard
synthetic or mineral oils to the refrigeration system. If Ester based
oil becomes contaminated with moisture or with standard oils, dispose
of properly - DO NOT USE.
|
Polyol Ester Based Type (required), (refer to Tool Catalog) |
| High Pressure Cutout Switch |
Cutout Cutin |
2302 ± 100 kPa, 23 ± 1 bar, 334± 15 psig 1703 ± 144kPa, 17.9 ± 1.5 bar, 247± 21 psig |
| Low Pressure Cutout Switch |
Cutout Cutin |
-33 to -54 kPa, -0.34 to -0.54 bar, 10 to 16 in. Hg vacuum 11.8 to 28 kPa, 0.12 to 0.28 bar, 3.5 to 8.5 psig |
| High Pressure Relief Valve | Relief Temperature | 80 °C, 176 °F |
| Vapor Injection Control | Modulation Cool or Power Limit | Vapor injection shall turn on if top cap thermistor reads 138°C±1°C (280°F±2°F) |
| Compressor Discharge Temperature Control |
Vapor Injection Valve Energizes (Opens) |
138°C (280 °F) |
R-134a Refrigerant - Maximum Cool Operation
| Container Temperature | Ambient Temperature | Suction Pressure | Discharge Pressure** |
|---|---|---|---|
|
70°F (21°C) |
80°-100°F (27°-38°C) |
16-20 psig 110-140 kPa 1.10-1.40 bar |
220-240 psig 1520-1660 kPa 15.20-16.60 bar |
|
35°F (2°C) |
80°-100°F (27°-38°C) |
7-11 psig 50-75 kPa 0.50-0.75 bar |
180-200 psig 1240-1380 kPa 12.40-13.80 bar |
|
0°F (-18°C) |
80°-100°F (27°-38°C) |
9”-5” -30 to -17 kPa -0.30 to -0.17 bar |
160-175 psig 1100-1210 kPa 11.00-12.10 bar |
|
-20°F (-29°C) |
80°-100°F (27°-38°C) |
14”-11” psig -47 to -37 kPa -0.47 to -0.37 bar |
150-170 psig 1035-1175 kPa 10.35-11.75 bar |
|
Suction and discharge pressures vary too greatly during Modulation Cool to use for evaluating or diagnosing refrigeration system performance. During the Modulation Cool mode, the suction pressure will vary between 100 and 450 kPa, 1.0 and 4.5 bar, 15 and 65 psig depending upon the percent (percent) cooling capacity. **Discharge pressure is determined by condenser fan cycling. |
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