Optional
Controls Features
Extended Operation Package
Select the
•External
•External
•External
•Refrigerant monitor input
Base-Loading Control
This feature allows an external controller to directly modulate the capacity of the chiller. It is typically used in applications where virtually infinite sources of evaporator load and condenser capacity are available and it is desirable to control the loading of the chiller.Two examples are industrial process applications and cogeneration plants. Industrial process applications might use this feature to impose a specific load on the facility’s electrical system. Cogeneration plants might use this feature to balance the system’s heating, cooling, and electrical generation.
All chiller safeties and Adaptive Control functions are in full effect when Base Loading is enabled. If the chiller approaches full current, the evaporator temperature drops too low, or the
condenser pressure rises too high, the controller’s Adaptive Control logic limits the loading of the chiller to prevent the chiller from shutting down on a safety limit. These limits may prevent the chiller from reaching the load requested by the Base Loading signal.
An alternative and less radical approach to Base Loading indirectly controls chiller capacity. Artificially load the chiller by setting the chilled- water setpoint lower than it is capable of achieving.Then, modify the chiller’s load by adjusting the
Hot-Water Control
This feature allows an external controller to enable/disable and modulate the
maintain the setpoint. Heating is the primary mission and cooling is a waste product or a secondary mission.
This technique provides application flexibility, especially in
The chiller needs only one condenser for
Refrigerant Monitor
The Extended Operation package allows for a refrigerant monitor to send a
The concentration level is displayed at DynaView, but the chiller will not take any action based on the input from the refrigerant monitor.
Alternatively, a refrigerant monitor can be connected toTracer Summit, which has the ability to increase ventilation in the equipment room in response to high refrigerant concentrations.
1 5 |