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User's Manual

ManualsBrandsEmerson ManualsRacks and Integrated SolutionsEmerson Liebert XD Pumping and Chiller Units
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Checklist for Liebert XDC Startup
34
4.1 System Refrigerant Charges Over 35 lb. (15.9kg) Require Additional Oil
4.1.1 Liebert XDC DX R-407C Circuit Volume
NOTICE
Risk of improper lubrication. May cause equipment damage.
Liebert XDCs refrigerant R-407C circuits with refrigerant charges over 55 lb (24.9kg) require
additional oil. See Figure 30 for the amount required for various charge levels.
Once the system has been fully charged with refrigerant, use a hand pump to add the
additional oil at the suction side of the system while the system is running.
The amount of oil added by field service must be recorded on a tag attached at the tandem,
(the amount added along with the date it was added). This will be documented on a tag
located at the tandem compressor and marked “Oil Added Field Service Record.” Refer to the
Liebert XDC user manual, SL-16671, available at Liebert’s Web site,
www.liebert.com
Figure 30 Additional oil requirements for refrigerant charge
To calculate the oil required, use the following formula:
Additional Oil Required per Circuit = (Refrigerant Charge * 0.4 - 22)
Enter the refrigerant charge in pounds to determine the oil required in ounces
NOTICE
Risk of improper compressor lubrication. Can cause compressor and refrigerant system
damage.
Failure to use oil types, viscosities and quantities recommended by the compressor
manufacturer may reduce compressor life and void the compressor warranty. See oil types
specified in Table 20.
• Do not mix polyol ester (POE) and mineral-based oils.
• Do not mix oils of different viscosities.
Consult Emerson or the compressor manufacturer if questions arise.
Table 20 Compressor oil types
Compressor Type
Refrigerant Type
R-407C
Copeland Scroll and Digital Scroll POE OIL - ISO 32 Viscosity
Use Copeland
®
POE Oil ULTRA 22 CC, Mobil EAL Arctic 22 CC, Copeland brand Ultra 22 CC, Copeland brand Ultra 32 CC,
Copeland brand Ultra 32-3MAF, Mobil EAL
™
Arctic 22 CC or Uniqema RL32-3MAF or other Copeland-approved oil.
140
130
120
110
100
90
80
70
60
50
40
30
10
20
0
0 100 300200 400
Additional Oil Required Per Circuit, Ounces
Each circuit contains ZRT250KCE Tandem
XDC160 System Refrigerant Field Charge Per Circuit, Pounds