Trane TC*150-301, Установка, эксплуатация и обслуживание

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RT-SVX25C-EN 45
Maintenance
• With the unit running, check and record the: ambient temperature; compressor suction and
discharge pressures (each circuit); superheat (each circuit); Record this data on an “operator’s
maintenance log” like the one shown in
Table 9, p. 43 . If the operating pressures indicate a
refrigerant shortage, measure the system superheat. For guidelines, refer to the “Compressor
Start-Up” section.
Note: Do Not release refrigerant to the atmosphere! If adding or removing refrigerant is required,
the service technician must comply with all federal, state and local laws.
Heating Season
• Inspect the unit’s air filters. If necessary, clean or replace them.
• Check supply fan motor bearings; repair or replace the motor as necessary.
• Inspect both the main unit control panel and heat section control box for loose electrical
components and terminal connections, as well as damaged wire insulation. Make any
necessary repairs.
• Verify that the electric heat system operates properly.
Coil Cleaning
Regular coil maintenance, including annual cleaning, enhances the unit’s operating efficiency by
minimizing: compressor head pressure and amperage draw; evaporator water carryover; fan brake
horsepower, due to increase static pressure losses; airflow reduction.
At least once each year, or more often if the unit is located in a “dirty” environment, clean the
evaporator and condenser coils using the instructions outlined below. Be sure to follow these
instructions as closely as possible to avoid damaging the coils.
To clean refrigerant coils, use a soft brush and a sprayer (either a garden pump-up type or a high-
pressure sprayer). A high-quality detergent is also required; suggested brands include “SPREX
A.C.”, “OAKITE 161”, “OAKITE 166” and “COILOX”. If the detergent selected is strongly alkaline (ph
value exceeds 8.5), add an inhibitor.
1. Remove enough panels from the unit to gain access to the coil. Remove the access panel from
the roof located next to the rear condenser fan.
2. Protect all electrical devices such as motors and controllers from any over spray.
3. Straighten any bent coil fins with a fin comb.
4. Mix the detergent with water according to the manufacturer’s instructions. If desired, heat the
solution to 150°F maximum to improve its cleansing capability.
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WARNING
Hazardous Pressures!
Coils contain refrigerant under pressure. When cleaning coils, maintain coil cleaning solution
temperature under 150°F to avoid excessive pressure in the coil. Failure to follow these safety
precautions could result in coil bursting, which could result in death or serious injury.
Do not heat the detergent-and-water solution above 150° F. Hot liquids sprayed on the exterior of
the coil will raise the coil’s internal pressure and may cause it to burst. Failure to follow proper
procedures can result in personal illness or injury or severe equipment damage.
5. Pour the cleaning solution into the sprayer. If a high-pressure sprayer is used:
a. do not allow sprayer pressure to exceed 600 psi.
b. the minimum nozzle spray angle is 15 degrees.
c. maintain a minimum clearance of 6" between the sprayer nozzle and the coil.
d. spray the solution perpendicular (at 90 degrees) to the coil face.