Table 8 Ð Control Test Menu Functions

TESTS TO BE

DEVICES TESTED

PERFORMED

 

1.Automated Tests* Operates the second through seventh tests

2. PSIO Thermistors

Entering chilled water

 

Leaving chilled water

 

Entering condenser water

 

Leaving condenser water

 

Discharge temperature

 

Bearing temperature

 

Motor winding temperature

 

Oil sump temperature

3.Options Thermistors Common chilled water supply sensor Common chilled water return sensor Remote reset sensor Temperature sensor Ð Spare 1

Spare 2

Spare 3

Spare 4

Spare 5

Spare 6

Spare 7

Spare 8

Spare 9

4. Transducers

Evaporator pressure

 

Condenser pressure

 

Oil pressure differential²

5.Guide Vane Actuator Open Close

6. Pumps

All pumps or individual pumps may be

 

activated:

 

Oil pump Ð Con®rm pressure

 

Chilled water pump Ð Con®rm ¯ow

 

Condenser water pump Ð Con®rm flow

 

Auxiliary oil pump Ð con®rm

 

pressure²

7.Discrete Outputs All outputs or individual outputs may

be energized:

Hot gas bypass relay Oil heater relay Motor cooling relay Tower fan relay Alarm relay

Shunt trip relay

8.Pumpdown/Lockout When using pumpdown/lockout, observe freeze up precautions when removing charge.

Instructs operator as to which valves to close and when.

Starts chilled water and condenser wa- ter pumps and con®rms ¯ows. Monitors Ð Evaporator pressure

Condenser pressure Evaporator temperature during pumpout procedures

Turns pumps off after pumpdown. Locks out compressor.

9.Terminate Lockout Starts pumps and monitors ¯ows. Instructs operator as to which valves to open and when.

Monitors Ð Evaporator pressure Condenser pressure Evaporator temperature during charging process

Terminates compressor lockout.

10. FX Gear Oil

Activates gear main oil pump; con-

Pump I/O

®rms pressure.

 

Activates optional gear auxiliary pump;

 

con®rms pressure.

*During any of the tests that are not automated, an out-of-range read- ing will have an asterisk (*) next to the reading and a message will be displayed.

²On open-drive chillers, differential pressure is the only oil pressure displayed.

See the Pumpout and Refrigerant Transfer Procedures (page 63) and Pumpout System Maintenance sections (page 83) for details on transferring refrigerant, oil speci®- cations, etc.

High Altitude Locations Ð Because the chiller is ini- tially calibrated at sea level, it is necessary to recalibrate the pressure transducers if the chiller is to be operated at a high altitude location. Please see the calibration procedure in the Troubleshooting Guide section.

Charge Refrigerant into Chiller

The transfer, addition, or removal of refrigerant in spring isolated chillers may place severe stress on external pip- ing if springs have not been blocked in both up and down directions.

The 17EX chiller may have the refrigerant already charged in the economizer/storage vessels. If chiller is not shipped fully charged, refrigerant is shipped separately to conform with transportation regulations. The 17EX may be ordered with a nitrogen holding charge of 15 psig (103 kPa). Evacu- ate the entire chiller, and charge chiller from refrigerant cylinders.

The full refrigerant charge on the 17EX will vary with chiller components and design conditions as indicated on the job data speci®cations. An approximate charge may be found in Physical Data and Wiring Schematics section, page 99. The full chiller charge is printed on the chiller identi®cation label.

Always operate the condenser and chilled water pumps during charging operations to prevent water in heat ex- changer tubes from freezing.

Use the CONTROLS TEST terminate lockout function to monitor conditions and start the pumps.

If the chiller has been shipped with a holding charge, add refrigerant through the refrigerant charging valve (Fig. 6) or to the pumpout charging connection. First evacuate the ni- trogen holding charge from the vessels. Charge the refrig- erant as a gas until the system pressure exceeds 35 psig (141 kPa). After the chiller is beyond this pressure, the re- frigerant should be charged as a liquid until all the recom- mended refrigerant charge has been added.

TRIMMING REFRIGERANT CHARGE Ð The 17EX is shipped with the correct charge for the design duty of the chiller. Trimming the charge can best be accomplished when the chiller is operating at design load. To trim, check the temperature difference between the leaving chilled water tem- perature and the cooler refrigerant temperature at full load design conditions. If necessary, add or remove refrigerant to bring the temperature difference to design conditions or a minimum differential.

INITIAL START-UP

Preparation Ð Before starting the chiller, check that the:

1.Power is on to the main starter, oil pump relay (which energizes both the compressor and gear oil pumps), tower fan starter, oil heater relay, and the chiller control center.

2.Cooling tower water is at proper level and at or below design entering temperature.

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Carrier 17EX specifications Charge Refrigerant into Chiller, Initial START-UP, Control Test Menu Functions

17EX specifications

The Carrier 17EX is recognized as an innovative air conditioning solution that combines efficiency with advanced technology. This model is designed to meet the increasing demands of residential and commercial cooling needs while maintaining environmental consciousness.

One of the standout features of the Carrier 17EX is its impressive Seasonal Energy Efficiency Ratio (SEER) rating. With a SEER rating that often exceeds 17, this unit ensures optimized energy consumption, significantly lowering operational costs for users. The incorporation of advanced compressor technology allows the system to adjust its cooling output based on the specific needs of the environment, thus providing both comfort and energy savings.

The Carrier 17EX utilizes a variable-speed inverter-driven compressor that enhances its performance and adaptability. This technology allows the air conditioning unit to operate at different speeds, intelligently adjusting to changing load conditions. As a result, the system runs more efficiently and quietly, providing a more consistent comfort level without the abrupt temperature swings associated with traditional units.

In addition to efficiency, the Carrier 17EX also prioritizes reliability and durability. The unit comes with a robust cabinet that protects the components from weather elements, ensuring longevity and consistent performance. The innovative design integrates a corrosion-resistant finish and robust insulation, which further enhances the unit's resilience in various environmental conditions.

For users concerned about indoor air quality, the Carrier 17EX includes advanced filtration systems designed to capture allergens and airborne particles. This feature is particularly beneficial for individuals with respiratory issues, ensuring that the air circulated within the space is clean and healthy.

Moreover, the Carrier 17EX is equipped with smart technology capabilities, allowing users to control their systems remotely through smartphones or other smart devices. This connectivity not only provides convenience but also empowers homeowners to optimize their energy use by adjusting settings on the fly, ensuring efficient operation even when they are away from home.

Overall, the Carrier 17EX stands out in the marketplace for its exceptional energy efficiency, advanced technology, and commitment to providing reliable and effective cooling solutions. Its combination of modern features makes it a preferred choice for those looking to enhance comfort while being mindful of energy consumption and environmental impact.