User manual

Piping
95 Liebert
®
DS
™
Sight Glass Levels
40°F (4.5°C) and lower—bottom sight glass is 3/4 full
40 to 60°F (4.5 to 15.5°C)—bottom sight glass is full
60°F (15.5°C) and higher—top sight glass is 3/4 full
9.3.3 Water/Glycol Cooled System
The water/glycol cooled system is factory-charged and includes and includes a Paradenser condenser
and control valves.
Table 55 Water/Glycol-cooled and GLYCOOL suction pressure transducer settings
Function
R-407C
Gauge (Sea Level) psiG (kPa) Absolute psiA (kPa)
Pump-Down Cutout 35 (241) 50 (344)
Pump-Down Reset 65 (448) 80 (552)
Minimum to Start-Cooling 50 (345) 65 (448)
Low-Pressure Cutout (DX only) 20 (138) 35 (241)
Freeze Protection (DX w/Econ-O-Coil) 52 (358) 67 (461)
Due to control processing time, the pumpdown pressure at compressor shut off will be approximately 20
psiG (138 kPa) / 35 psiA (241 kPa) even though the set point is 35 psiG (241 kPa) / 50 psiA (344kPa).