Trane Modular 20 to 35 Tons Manual de instalación descargar pdf (Pagina 24)

Maintenance

24 CXRC-SVX01F-EN

rise.The maximum allowable rise over a 15 minute period

is 200 microns. If the pressure rise is greater than 200

microns but levels off to a constant value, excessive

moisture is present. If the pressure steadily continues to

rise, a leak is indicated. Figure 19, p. 24 illustrates three

possible results of the “standing vacuum test”.

If a leak is encountered, repair the system and repeat the

evacuation process until the recommended vacuum is

obtained. Once the system has been evacuated, break the

vacuum with refrigerant, and complete the remaining

“Pre-Start Procedures” before starting the unit.

Refrigerant Charging

Important: For proper system operation, use only

refrigerant type listed on unit nameplate.

Once the system is properly installed, leak tested, and

evacuated, refrigerant charging can begin. Charge

refrigerant into the system by weight. Approximate

operating refrigerant charge capacities for 20 through 60-

ton CCRC/CIRC condensing units are given in Table 1, p. 7

Figure 18. Typical vacuum pump hookup

Figure 19. Evacuation time vs. pressure rise

CAUTION

Refrigerant at Freezing Temperature!

Avoid contact with skin. If working with refrigerant is

necessary, you MUST wear all Personal Protective

Equipment (PPE) including eye protection, safety

gloves, long sleeves, and pants. In case of contact, treat

the injury similar to frostbite. Slowly warm the affected

area with lukewarm water and seek immediate medical

attention. Direct contact with liquid refrigerant could

result in minor to moderate injury.

NOTICE:

Compressor Damage!

Charge both circuits of dual circuited systems to

prevent compressor damage.

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Trane Modular 20 to 35 Tons Manual de instalación Pagina 24