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Introduction
3
1.0 INTRODUCTION
1.1 System Descriptions
Challenger 3000
™
environmental control systems are available in three main system configurations:
• self-contained system with a scroll compressor in the room unit
• self-contained chilled water system
• split system with an evaporator section and a remote condensing unit
All three types are available in upflow or downflow configurations. The standard upflow configuration
is front return. All models require three-phase power. Units are available in 208, 230, 460, or 575V,
60Hz; and 200, 230 or 380/415V, 50Hz.
The following features are included as standard in all room units regardless of the type of system: Lie-
bert iCOM control, A-frame coil (V-frame on upflows), infrared humidifier, finned tubular stainless
steel electric reheat, 2" filter, individual high voltage fused protection and fan assembly.
1.1.1 Self-Contained Systems
Air-Cooled Models
Complete refrigeration system including hot gas bypass and crankcase heater with standard scroll
compressor, standard condenser and fan speed control for 95°F (35°C) ambient at sea level. Optional
Digital scroll compressor with unloading solenoid valve is also available. Digital scroll compressor
systems do not include hot gas bypass.
Water-Cooled Models
Compete refrigeration system including hot gas bypass with standard scroll compressor, water/glycol-
cooled condenser and two-way water regulating valve with bypass. Optional digital scroll compressor
with unloading solenoid valve is also available. Digital scroll compressor systems use a 2-way motor-
ized ball valve in lieu of the regulating valve; they do not include hot gas bypass.
Glycol-Cooled Models
The water-cooled model as described above plus pump package and 95°F (35°C) design ambient dry-
cooler.
GLYCOOL Models (5-Ton Only)
Complete refrigeration system including hot gas bypass with standard scroll compressor, glycol con-
denser and three-way water regulating valve plus an integrally piped Econ-O-Coil with three-way mod-
ulating control valve. Optional digital scroll compressor with unloading solenoid valve is also available.
Digital scroll compressor systems use a 3-way motorized ball valve in lieu of the regulating valve; they
do not include hot gas bypass.
1.1.2 Chilled Water Models
Chilled Water models include chilled water piping, three-way modulating valve, and actuator assem-
bly.