of the system. The AquaForce® 30XW chiller's positive pressure design ensures that air, moisture and other performance degrading contaminants are not sucked inside the chiller. Purge units and their associated maintenance are no longer necessary.
Refrigerant isolation valves
The refrigerant isolation valves enable service personnel to store the refriger- ant charge in the evaporator or con- denser during servicing. These valves also allow the refrigerant to be stored inside the chiller during shipment from the factory minimizing
Optional suction service valves
The optional suction service valves allow for further isolation of the com- pressor from the evaporator vessel.
Marine container shipment
The compact design allows for con- tainer shipment to export destinations, ensuring quality while reducing ship- ping cost.
Heat exchangers
The Aquaforce 30XW chillers utilize mechanically cleanable shell and tube evaporators and condensers available with a complete line of waterbox options to meet project specific requirements. One, two, and three pass arrangements are available to meet a wide variety of flow conditions. Nozzle in head and marine waterboxes are available to meet 150 psig
(1034 kPa) and 300 psig (2068 kPa) piping requirements.
Heat exchanger features include:
ASME certified construction
An independent agency certifies the design, manufacture, and testing of all heat exchangers to American Society of Mechanical Engineers (ASME) stan- dards, ensuring heat exchanger safety, reliability and long life. The ASME
(2068 kPa) marine waterboxes are provided.
Electronic
An electronic
High performance tubing
Carrier's AquaForce chillers utilize advances in heat transfer technology providing compact,
Evaporator tube expansion
Evaporator tube expansion at center support sheets prevents unwanted tube movement and vibration, thereby reducing the possibility of premature tube failure. Tube wall thickness is greater at the expansion location, sup- port sheets, and end tube sheets, to provide maximum strength and long tube life.
Closely spaced intermediate sup- port sheets
Support sheets prevent tube sagging and vibration, thereby increasing heat exchanger life.
Refrigerant filter isolation valves
These valves allow filter replacement without pumping down the chiller, reducing service time and expense.
Microprocessor controls
The AquaForce 30XW screw chiller controls communicate in easy to under- stand English, making it as easy as pos- sible to monitor and control each chiller while maintaining fluid tempera- tures. Controls are available with French, Portuguese and Spanish as standard configuration options. These controls result in higher chiller reliabil- ity, simplified training and correspond- ingly lower operational and maintenance costs.
Two user interface options are avail- able, the Touch Pilot™ display and the Navigator™ module.
The Touch Pilot display is an easy to use touch screen display that provides simple navigation for configuration and control of the 30XW units.
Carrier's exclusive handheld Naviga- tor display provides convenience and powerful information in the palm of your hand. The Navigator display helps technicians to quickly diagnose prob- lems and even prevent them from occurring.
All 30XW units are ready to be used with Carrier Comfort Network® (CCN) devices.
Controls features include:
Automatic capacity override
This function unloads the compressor whenever key safety limits are approached, increasing unit life.
Chilled liquid reset
Reset can be accomplished manually or automatically from the building man- agement system. For a given capacity, reset allows operation at slower com- pressor speeds, saving energy when warmer chilled liquid can be used.
Demand limiting
This feature limits the power draw of the chiller during peak loading condi- tions. When incorporated into the CCN building automation system, a red line command holds chillers at their present capacity and prevents any other chillers from starting. If a load shed signal is received, the compres- sors are unloaded to avoid demand charges whenever possible.
Ramp loading
Ramp loading ensures smooth pull- down of liquid loop temperature and prevents a rapid increase in compres- sor power consumption during the pulldown period.
Automated controls test
The test can be executed prior to start- up to verify that the entire control sys- tem is functioning properly.
This feature allows the operator to pro- gram a yearly schedule for each week, weekends, and holidays.
Occupancy schedules
Schedules can be programmed into the controller to ensure that the chiller operates when cooling is required and remains off when not needed by the tenants or process.
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