3.4.11 Drycooler Settings; 3.4.12 Compressor Oil; Table 9 Water/Glycol System Conditions Requiring Optional Settings For Aquastats; Table 10 Aquastat Settings-Two-Fan Through Four-Fan Drycoolers - Emerson Liebert Challenger iCOM 3000 Operation & Maintenance Manual

3.4.11 Drycooler Settings

Applications with the Optional Stat Setting require field piping to be insulated to prevent
condensation. Table 9 shows acceptable applications where stats must be adjusted to Optional
Setting. Aquastats must be field-adjusted to Optional Setting for:
• GLYCOOL/Dual Cool applications
• Single Drycooler loops with motor ball valve flow controls (motor ball valves are used on all
Liebert Challenger 3000 units with digital compressors).
Table 9 Water/glycol system conditions requiring optional settings for aquastats
Cooling Type
Flow Control
Drycoolers in Loop
1
Stat Setting
Insulate Field Piping
1. See Table 10.
2. MBV=motor ball valve; WRV=water regulating valve
Table 10 Aquastat settings—two-fan through four-fan drycoolers
Dial Setting (Stat Open Temp) Set for Mid Differential 8°F (4.4°C) Rise to Close
Aquastat #
AQ1
AQ2
AQ3
NOTE
1. All drycoolers are shipped at Factory Setting.
2. Factory Setting is used for all glycol applications, except single drycooler loops with motor
ball valve controls.
3. Stats must be field-adjusted to Optional Setting for GLYCOOL/Dual Cool applications
and all single drycooler loops using motor ball valve flow controls.

3.4.12 Compressor Oil

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 11.
• Do NOT mix polyol ester (POE) and mineral-based oils.
• Do NOT mix oils of different viscosities.
Consult Emerson or the compressor manufacturer if you have questions.
Table 11 Compressor oil types
Compressor Type
Copeland Scroll
and Digital Scroll
Use Copeland POE Oil ULTRA 22CC, Mobil EAL Arctic 22CC or other Copeland-approved oils.
™
Liebert ® Challenger 3000
Glycool
MBV
1 Multiple
Optional Optional
Yes Yes
Factory Setting
Fans (Glycol) (see Notes 1 and 2)
F1 65°F (18.3°C)
F2 & F3 75°F (23.9°C)
F4 70°F (21.1°C)
R-407c
POE Oil - ISO 22 Viscosity *
Component Operation and Maintenance
WRV
1 Multiple
Optional Optional Optional
Yes Yes Yes
22
Glycol
MBV WRV
1 Multiple 1
Factory Factory
No No
Optional Setting
(GLYCOOL) (see Note 3)
35°F (1.7°C)
45°F (7.2°C)
40°F (4.4°C)
Multiple
Factory
No