| Mechanical Specifications Power Panel
A factory wired and mounted power panel shall include: main
power connection, control transformer and 115 volt single phase control circuit. Unit
shall be available for operation on 200, 230, 460 or 575 volts, 3-phase, 60 hertz power or
190, 220, 380 or 415 volts, 3-phase, 50 hertz power.
Control Panel
The unit control panel (UCP2) is a microprocessor-based
chiller control system that provides complete standalone operation. The UPC2 shall provide
the following items:
Control Functions
• Chilled water temperature control
• Concentration Control
System Features and Functions
• User interface with a 40 character, two line display
and a 16 key keypad, capable of displaying 7 languages and SI or English units
• Passwords for protection of unit setup and
configuration
• Chilled water pump control
• Absorber/Condenser pump control
• Automatic and manual control of solution and
refrigerant pumps
• Solution flow control of the low temperature
solution pump and absorber pump via an adjustable frequency drive
• Anti-crystallization through dilution control
• Automatic and manual purge system
• Chilled water reset
• Two-way valve assembly for hot water flow control or
steam flow control
Adaptive Limits
• Evaporator water temperature limit
• High interstage pressure limit
• High interstage temperature limit
• Low absorber/condenser limit
• Soft-loading control
System Protection
• Evaporator freeze protection
• Chilled water flow confirmation
• Cooling water flow confirmation
• High interstage pressure cutout to prevent excessive
pressure
• Emergency stop/shutdown
Monitor and Displays
• Chilled water temperature entering and leaving
• Absorber/Condenser water temperature entering and
leaving
• Evaporator water flow (opt)
• Cooling water flow (opt)
• Solution concentrations
• Solution temperatures
• Interstage pressure
• Total motor current
• Unit voltage
• Chiller run time and starts
• Purge operation and run time
Interfaces to UCP2
• Interface to Tracer ICS Systems
• External machine manual reset alarm indication
output
• External machine auto reset warming indication
output
• External limit warning indication output
• Interstage pressure relief request output
• Maximum capacity indication output
• External auto-stop/emergency shutdown
• External chilled water setpoint (opt)
• Tracer temperature sensor (opt)
• Tracer controlled relay (opt) |
