Emerson Liebert Challenger With Liebert iCOM Control 3000/ITR - Manual (Page 49)

Component Operation and Maintenance
43
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 23 Outdoor fan/condenser configuration
7.4.7 Water/Glycol Cooled Condensers
Coaxial Condenser
Each water- or glycol-cooled module has a coaxial condenser that consists of a steel outside tube and a
copper inside tube.
Coaxial condensers do not normally require maintenance or replacement if the water supply is clean.
If your system operates at high head pressure with reduced capacity, and all other causes have been
eliminated, the coaxial condenser may be obstructed and needs to be replaced.
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 (typical). When installing traps, pro-
vide 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