Liebert CHALLENGER 3000 - Manual (Page 56)

Component Operation and Maintenance
48
6.4.6 Air Cooled Condenser
Restricted airflow through the condenser coil will reduce the operating efficiency of the unit and can
result in high compressor head pressure and loss of cooling.
Clean the condenser coil of all debris that will inhibit air flow. This can be done with compressed air
or commercial coil cleaner. Check for bent or damaged coil fins and repair as necessary. In winter, do
not permit snow to accumulate around the sides or underneath the condenser.
Check all refrigerant lines and capillaries for vibration isolation. Support as necessary. Visually
inspect all refrigerant lines for signs of oil leaks.
Checking Refrigerant Charge (Lee–Temp/Flood Back Head Pressure Control)
The system refrigerant level must be checked periodically. To do so:
1. Adjust temperature setpoint in the unit so that the compressor will run continuously.
2. The refrigerant level is visible through two sight glasses on the receiver and will vary with
ambient temperature.
a. 40°F (4.4°C) and lower — Midway on the bottom sight glass.
b. 40 to 60°F (4.4 to 15.6°C) — Bottom sight glass should be clear with liquid.
c. 60°F (15.6°C) and above — Midway on the top sight glass.
3. Return temperature setpoint to desired number.
Figure 9 Outdoor fan/condenser configuration
Secure each leg to condenser
frame at all points shown using
hardware provided.
Liquid line
* B
Hot gas line
Electric service
supplied by others
FAN SPEED CONDENSER
Lee-Temp heater pad
connection box
*B - Inverted traps are to be field-supplied and installed (typ). When installing traps, provide
clearance for swing end of access door. Traps are to extend above base of coil by a
minimum of 7-1/2" (190 mm).
Liquid line
Electric
service
supplied by
others
Hot gas line
* B
LEE-TEMP CONDENSER