Technical Specifications

Heat Rejection
107
6.4.1 Air-Cooled Condenser with Liebert Lee-Temp “Flooded Condenser” Head Pressure
Control System—R-407C (DX) Circuit
The Liebert Lee-Temp system consists of a modulating type head pressure control valves and
insulated receivers with heater pads to ensure operation at ambient temperatures as low as -30°F
(-34.4°C).
Liebert Lee-Temp Piping
Two discharge lines and two liquid lines must be field-installed between the indoor unit and the
outdoor condenser. See Figures 103 and 106 for details.
Liebert Lee-Temp Control Materials Supplied
•Built-in, pre-wired condenser control box
• Air-cooled condenser
• Piping access cover to be reinstalled when piping is complete
• Bolts—four per leg (3/8" x 5/8")
• Terminal block for two-wire, 24V interlock connection between unit and condenser
• Condensate legs—four with one-fan, six on two-and three-fan models and eight on four-fan models
• Bolts—used to mount receiver (3/8" x 1-1/4")
• Liebert Lee-Temp system:
• Insulated storage receiver—one per circuit
• Head pressure control assembly (head pressure valves and check valves) - one per circuit
• Service valve—one per circuit
• Pressure relief valve—one per circuit
• Liquid level sight glasses
NOTE
Liebert Lee-Temp heater pads require a separate, continuous electrical source. See nameplate
on unit for proper voltage.