Vertiv CoolPhase CDU - Page 58

See Refrigerant Charge Requirements for Air Cooled Systems on page50 for the amount required for various system level
charges.
In addition to oil added based on system charge, additional oil is required for discharge line field installed traps. Standard
formed tube traps are required. See Figure 5.2 below and Table 5.9 on the facing page .
Figure 5.2 Standard Formed Tube Trap Versus Straight Tubes and Fittings Trap
Item Description
1 Standard form fitted tube trap
2 Straight tubes and fittings trap
Straight tubes and fittings used as traps require much more oil and the length of the straight tube can vary.
With the total calculated refrigerant charge for each circuit, see Table 5.8 on the previous page for the refrigerant charge
amount that was calculated and follow that line to the right to see how much additional compressor oil is required for each
circuit. Count the numbers of traps in each circuit. See Table 5.10 on page54 for the discharge line pipe diameter. Follow the
line to the right to see how much oil is needed per trap. Multiply the number of traps per circuit by the oil volume. Add the
additional compressor oil amount and the trap oil volume together. This will be the total amount of oil that will need to be
added before the refrigerant is added to each circuit.
The amount of oil added by field service must be recorded on the tag marked "Oil Added Field Service Record" that is
attached to each compressor. The date of oil addition must be included as well.
52 Proprietary and Confidential ©2024 Vertiv Group Corp. 5 Refrigerant Piping Requirements
Vertiv™ CoolPhase CDU Installer/User Guide