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Component Operation and Maintenance, Checks and Adjustments
54
7.4.7 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 periodically checked. This is easily done by the following proce-
dure:
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 8 Outdoor fan/condenser configuration
Fan Motor M1
Inverted Traps
by Others
Hot Gas Line
Lee-Temp Heater Pad
Connection Boxes
Electric Service
Supplied by Others
Electric Service
Supplied by Others
Hot Gas Line
Inverted Traps
by Others
Fan Motor FS
Secure each leg to
condenser frame at all
points shown using
hardware provided
Liquid Line
Liquid Line