Emerson ITR manual Water or Glycol-Cooled Split Systems, Optional Quiet-Line Models

Electrical Data

Propeller Fan Condensing Unit

The condenser coil shall be constructed of copper tubes and aluminum fins with a direct drive propel- ler type fan and shall include a scroll compressor, high pressure switch, Liebert Lee-Temp receiver, head pressure control valve, and liquid line solenoid valve. All components shall be factory assembled, charged with refrigerant and sealed. No brazing, dehydration, or charging shall be required. Con- densing unit shall be designed for 95°F (35°C) ambient and be capable of operation to -30°F (-34.4°C).

A hot gas bypass circuit shall be provided to reduce compressor cycling and improve operation under low load conditions.

(Optional) Quiet-Line Models

The condensing unit shall be designed to operate at a sound level less then 58 dBa.

(Optional) High Ambient Models

The outdoor condensing unit shall be designed for design ambient operation of 105°F (40.6°C).

5-Ton Models

Condensing unit must be hard piped with the evaporator. Sweat adapters are shipped loose with all evaporators for use on the 5 ton condensing units.

2.3.1Water or Glycol-Cooled Split Systems

Water or Glycol-Cooled Condensing Unit

The water/glycol condensing unit shall be equipped with a coaxial condenser having a total system pressure drop of _____ ft. of water (kPa) and a flow rate of _____ GPM (l/s) with _____ °F (°C) entering water/glycol temperature.

Components shall include scroll compressor and high-pressure switch. The condensing unit shall be factory charged with R-22 refrigerant.

The condenser circuit shall be pre-piped with a [(2-way) (three-way)] regulating valve which is head- pressure actuated.

The condenser water/glycol circuit shall be designed for a static operating pressure of [(150 PSI (1034 kPa)) (350 PSI (2413 kPa))].

A hot gas bypass circuit shall be provided to reduce compressor cycling and improve operation under low load conditions.

A 70/30 Cu-Ni Econ-O-Coil must be specified whenever a GLYCOOL or Dual Cooling Source system is applied to a cooling tower loop or other open water system.

(Optional) Disconnect

Factory installed non-fused disconnect switch allows unit to be turned off for maintenance.

5-Ton Models

Condensing unit must be hard piped with the evaporator. Sweat adapters are shipped loose with all evaporators for use on the 5 ton condensing units.

Propeller Fan Drycooler (Standard)

The Liebert manufactured drycooler shall be the low profile, slow speed, direct drive propeller fan type. The drycooler shall be constructed of aluminum and contain a copper tube aluminum fin coil with an integral electric control panel. The drycooler shall be designed for _____ °F (°C) ambient.

Centrifugal Fan Drycooler (Optional)

The system shall be supplied with a centrifugal fan drycooler (LCD). The drycooler shall be con- structed of galvanized steel with a copper tube, aluminum fin coil. The heavy duty fan shall be the centrifugal type, double width, double inlet. The 1750 RPM (1450 RPM @ 50 Hz) fan motor shall be mounted on an adjustable base, and equipped with an adjustable motor pulley. A three-way control valve and thermostat shall maintain the desired fluid temperature. Electrical controls shall be in a rain tight enclosure. The system shall be designed for _____ °F (°C) ambient. The drycooler shall have a _____ Volt, 3 phase, _____ Hz power supply.

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