![Carrier 69NT40-561-019 Скачать руководство пользователя страница 91](http://html1.mh-extra.com/html/carrier/69nt40-561-019/69nt40-561-019_operation-and-service-manual_2563845091.webp)
7–5
T-359
7.3.4
Evacuation and Dehydration
General
Moisture is detrimental to refrigeration systems. The presence of moisture in a refrigeration system can have many
undesirable effects. The most common are cop per plating, acid sludge formation, “freezing-up” of metering
devices by free water, and formation of acids, resulting in metal corrosion.
Preparation
a. Evacuate and dehydrate only after pressure leak test.
b. Essential tools to properly evacuate and dehydrate any system include a vacuum pump (8 m
3
/hr = 5 cfm
volume displacement) and an electronic vacuum gauge. (The pump is available from Carrier Transicold,
part number 07-00176-11.)
c. If possible, keep the ambient temperature above 15.6°C (60°F) to speed evaporation of moisture. If the
ambient temperature is lower than 15.6°C (60°F), ice might form before moisture removal is complete. Heat
lamps or alternate sources of heat may be used to raise the system temperature.
d. Additional time may be saved during a complete system pump down by replacing the filter drier with a sec-
tion of copper tubing and the appropriate fittings. Installation of a new drier may be performed during the
charging procedure.
Figure 7.4 Refrigeration System Service Connections
1. Liquid Service Connection
2. Receiver
3. Compressor
4. Discharge Service Connection
5. Suction Service Connection
6. Vacuum Pump
7. Electronic Vacuum Gauge
8. Manifold Gauge Set
9. Refrigerant Cylinder
10. Reclaimer
- - - - -
D
S
Содержание 69NT40-561-019
Страница 2: ......
Страница 4: ......
Страница 74: ......
Страница 127: ...8 3 T 359 Figure 8 2 SCHEMATIC DIAGRAM Evergreen Unit Configuration ...
Страница 128: ...T 359 8 4 Figure 8 3 UNIT WIRING DIAGRAM Evergreen Unit Configuration Sheet 1 of 2 ...
Страница 129: ...8 5 T 359 Figure 8 4 UNIT WIRING DIAGRAM Evergreen Unit Configuration Sheet 2 of 2 ...
Страница 130: ......
Страница 134: ......
Страница 135: ......