Dunham Bush 250 Ton Air Cooled Screw Chiller


• Model AVX-A-265S-ANHRQ

• 208/3/60 Operation

• 250 Tons each

• Qty of (1) Rotary Screw Compressors MSC 2233

• Remote Condenser / Split Unit

o Outdoor Unit is a Remote Condenser

o Indoor Unit is Evaporator, Compressors, and Control Panel

Equipment Construction

• Heavy Gauge G90 Galvanized Steel

• All Sheet Metal Parts are Painted with Oven Baked Epoxy Polyester Powder Paint

• Bolted Construction for Easy Semi-Knocked Down at Site in Case of Hoisting Problem

• Rigid Structural Base to Prevent Unit Deflection and Damage During Hoisting

• Cobalt Chromed Bolts and Nuts for Maximum Corrosion Resistance

• Control Panel IP54

Physical Specifications:

• Compressors (Qty): MSC2233(1)

• Length: 330” Outdoor / 180” Indoor Model AVX-A-265S-ANHRQ

• Width: 89” Outdoor / 70” Indoor Model AVX-A-265S-ANHRQ

• Height: 83” Outdoor / 92” Indoor Model AVX-A-265S-ANHRQ

Compressor

• Compartmentalized to Reduce Noise

• MSC Rotary Screw

• Semi-Hermetic Design

• Cast Iron Housing

IP21 Terminal Box

• Slide Valve Unloading

• Suction Check Valve and Service Valve

• Compressor Oil Sump Heater

• Relief Valve if Required

• Optical Oil Level Sensor

• Integral Oil Separator

• Integral Lubrication System using Pressure Differential

• Compressor Liquid and Vapour Injection

• Double Delta Starter

Air Cooled Condenser

• Inner Ridged Copper Tubes

• Aluminum Fins

• 450 psig Test Pressure For Condenser Coils

• Low Noise Direct Driven Propeller and Axial Fans

• Galvanized Steel Tubesheet

• Close Blade Tip Clearance with the Fan Venturis to Assure Smooth, Quiet Operation

• 6 Pole Fan Motor, IP55, Class F Insulation with Class B Temperature Rise

• Fan Cycling Low Ambient Control Down to 0F, and Reduce Unit Power Input at Low Ambient

Evaporator

• Vessels Constructed in Accordance to ASME Codes Sections VIII Division I for Unfired Pressure Vessels

• Flooded Design for Higher Capacity and Easy Maintenance

• Cleanable Integral Fin Copper Tubes for Easy Serviceability

• Removable Water Heads

• Optional Flanged Water Connection For Quick Installation and/or Service

• Full Pump-Down Capacity in Condenser, Therefore, Pump Out Unit Not Required

• 200 psig on Refrigerant Side Design Pressure

• 150 psig on Water Side Design Pressure

• 1” Thick PE Foam Closed Cell Evaporator Insulation

• Drain and Vent Plugs

• Carbon Steel Header, Shell and Tube Sheet

• Relieve Valve

• Main Incoming Isolator with Door Interlock Handle

Refrigerant Specialties

• Liquid Level Float Control

• Liquid Receiver

• Economizer to Increase Capacity

• Sight Glass with Moisture Indicator

• Liquid Line Solenoid

• Replaceable Core Filter/Drier

• Charging and Gauge Connections

• High Pressure Relief Valves

• R-134A Refrigerant Rated

o Shipped with Dry Nitrogen Holding Charge

Indicator Lights

• Compressor Overloads, Each Compressor

• High Motor Temperature, Each Compressor

• High Pressure, Low Pressure, and Freeze

• Control Power

Standard Electrical Components

• Compressor MCCB and Contactors

• Compressor Solid State Overloads

• Low Voltage/Phase Failure/Phase Reversal Relay

On-Off Switch in the Unit Control Circuit and each Compressor Control Circuit

• Fan Control Contactors

• Control Circuit Transformer

• Current Transformer