MECHANICAL SPECIFICATIONS:
HIGH EFFICIENCY WATER COOLED ROTARY SCREW COMPRESSOR 134A
CONDENSING UNIT
• Single Rotary Screw compressor.
• Suction and discharge service valves (not supplied by some of our competitors).
• Rubber mounted to the frame.
• Compressor internal thermal motor protection and high discharge temperature sensors.
• 120 volt fused crankcase heater.
• Liquid line sight glass moisture indicator.
• Replaceable core filter dryer.
• Electronic expansion valve that also acts as a liquid line solenoid (shipped loose for field installation).
• Single circuit brazed plate condenser, 316L plates copper brazed.
• Condenser certified to UL 207 7th edition and C22.2 no. 140.3-M1987.
• Refrigeration pressure relief valve.
• Refrigeration rating 450 psi at 383°F.
• Water rating 400 psi at 383°F.
• 6" or 8" schedule 40 steel pipe main header and branch headers with roll groove ends and couplings two
(2) grooved evaporator valves.
• NEMA 1 control panel with on-off switch power on light.
• Chillers certified to CAN/CSA C22.2 No. 236 / UL 1995 3rd 2005 Heating and Cooling Equipment.
• Compressor circuit breaker with through-the-door handle to turn off (disconnects power).
• Part Wind Start with two (2) compressor contactors with solid state overloads and time delay relay.
• 24 VAC – 250 VA chiller controller transformer with primary and secondary fuses.
• 120 VAC – 250 VA control voltage transformer with primary and secondary fuses.
• Chiller controller senses and displays all operating and fault conditions with a four (4) line liquid crystal
display located in the control panel door.
CHILLER CONTROLLER
• Four line liquid crystal display located in control panel door.
• Displays in English all operating and fault conditions.
• Default screen displays entering and leaving chilled water temperature and two (2) icons of a compressor
one above the other representing the upper and lower compressors, an outline of the compressor shows it
off, a dark icon shows the compressor operating. An exclamation mark inside the outline of the
compressor indicates a compressor fault condition.
• In a stand-alone
• Prevents short cycling of compressors by setting minimum run time and off time.
• Sets “stage up time” and “stage down” of compressors and capacity control steps.
• Lead – lags compressors on a first in – first out basis to try and equalize run time.
• Changes the lead compressor if one has accumulated more run time by 12 hours.
• Logs the number of compressors starts and run hours of each compressor.
• Senses and displays entering and leaving chilled water temperature.
• Senses and displays low leaving chilled water temperature (freezestat).
• Senses and displays refrigerant high pressure and low pressure each circuit.
• Second mechanical high pressure cut in compressor control circuit, to protect against controller failure.
• Displays compressor motor internal protection fault sensing windings and discharge temperatures
• Displays water flow switch fault.
• In a Group
• Protects its compressor from fault conditions.
• Reports operating and fault conditions back to System Remote Master.
• Compressors are staged by System Remote Master.
• Inputs and Outputs
• Remote on/off input to start chiller when no communications card is used.
• Remote 4 to 20 ma input to change set point when no communications card is used.
• Output for alarm fault condition when no communications card is used.
• Outputs with 4-20 ma for control of motorized valves.
• Outputs to start either a chilled water pump or condenser water pump.