The lubricant should be drained while the gear is at op- erating temperature. The gear drive should be cleaned with a ¯ushing oil. Used lubricant and ¯ushing oil should be com- pletely removed from the system to avoid contaminating new oil.

To change the oil in the external gear:

1.Make sure that the compressor is off and the disconnect for the compressor is open.

2.Disconnect the power to the oil heater, if equipped, and the oil pump.

3.Open the drain located on the shell of the cooler/®lter. Run a hose from the drain to a bucket to catch the oil.

4.Once the pressure has been removed and the oil drained, loosen the bolts that hold the cover on the ®lter body. Remove the old ®lter cartridges. Assemble the ®lter as- sembly (®lters, spacer, and stopper assembly), and make sure that the spring is centered against the ®lter assembly as shown in Fig. 44.

5.Replace the drain ®tting, using standard practices to en- sure a leak-tight joint.

6.Open the isolation valves and add new oil. Refer to Table 11 for oil speci®cations.

7.Connect power to the oil heater, if equipped, and the oil pump. Operate the oil pump for 2 minutes. Add oil, if required, to keep the level up in the sight glass.

MOTOR SLEEVE BEARING AND PUMPOUT COM- PRESSOR OIL Ð For instructions on changing the motor sleeve bearing oil, refer to the section on Motor Mainte- nance, this page.

For instructions on changing the optional pumpout com- pressor and oil separator oil, refer to the section on Pumpout System Maintenance, page 83.

Inspect Refrigerant Float System Ð Inspect the refrigerant ¯oat system once every 5 years or when the economizer/storage vessel is opened for service. Transfer the refrigerant into the cooler vessel or into a storage tank. There are two ¯oats on the 17EX, one on each side of the economizer/ storage vessel. Remove the ¯oat access covers. Clean the chambers and valve assembly thoroughly. Be sure that the valves move freely. Make sure that all openings are free of obstructions. Examine the cover gaskets and replace if nec- essary. See Fig. 45 for a view of both ¯oats.

Inspect Relief Valves and Piping Ð The relief valves on this chiller protect the system against the potentially dan- gerous effects of overpressure. To ensure against damage to the equipment and possible injury to personnel, these de- vices must be kept in peak operating condition.

As a minimum, the following maintenance is required.

1.At least once a year, disconnect the vent piping at the valve outlet and carefully inspect the valve body and mecha- nism for any evidence of internal corrosion or rust, dirt, scale, leakage, etc.

2.If corrosion or foreign material is found, do not attempt to repair or recondition. Replace the valve.

3.If the chiller is installed in a corrosive atmosphere or the relief valves are vented into a corrosive atmosphere, make valve inspections at more frequent intervals.

Coupling Maintenance Ð Proper coupling mainte- nance is important since the coupling supports the outboard end of the compressor high speed shaft. Clean and inspect both couplings for wear yearly. Misalignment causes undue noise and wear. Check alignment yearly, or more often if vibration or heating occur. Refer to Chiller Alignment sec- tion, page 71.

Never operate the drive without the coupling guards in place. Contact with a rotating shaft or coupling can cause serious injury.

Motor Maintenance Ð A carefully planned and ex- ecuted program of inspection and maintenance will do much to ensure maximum motor availability and minimum main- tenance cost. If it becomes necessary to repair, recondition, or rebuild the motor, it is recommended that the nearest West- inghouse repair facility be consulted.

In addition to a daily observation of the appearance and operation of the motor, it is recommended that a general in- spection procedure be established to periodically check the following items:

·cleanliness, both external and internal

·stator and rotor (squirrel-cage) windings

·bearings

Fig. 45 Ð Typical Float Valve Arrangement

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Carrier 17EX specifications Typical Float Valve Arrangement
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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.
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