Trane 4TYK6524D1000AL - Page 26

Trane 4TYK6524D1000AL

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26 MS-SVN052E-EN

System Operation

Table of Contents

NOTICE3
Important Environmental Concerns3
Important Responsible Refrigerant Practices3
- Proper Field Wiring and Grounding Required3
- Use of Refrigerant!3
- Personal Protective Equipment (PPE) Required!4
U-Match Inverter Unit (16 SEER) - R410A Refrigerant Voltage 220/230/1/60hz5
Inspection5
Limitations6
- 1. All limitations shall be observed for the indoor unit as well as for the coil and appropriate accessories.6
- 2. The outdoor unit shall not be installed with ductwork in the passage of air current. The outdoor fan is one of propeller type and is not designed to operate against any additional external static pressure.6
- 3. Maximum and minimum operating conditions shall be observed in order to ascertain that the system offers maximum performance with minimum service.6
- 4. This unit is not designed to operate with a low ambient kit. The control system shall not be modified to operate with any type of low ambient kit.6
- 5. The maximum length of line allowed for this product is of 100 feet.6
- Location8
- Installation on Outdoor Flat Surface8
- Installation on the Roof8
- Installation of the unit8
- Mounting of the Unit9
- Factory Recommendation for Mounting the Unit9
Cautions to be Observed During Installation of Refrigerant Lines10
- 1. Install lines with the least amount of curves possible. Avoid damaging line couplings or line curves. Use clean and hard drawn copper tubing at points where it will not be necessary to apply multiple curves around obstructions. When it is necessar...10
- 2. Install lines avoiding any obstructions to the coil, to the air handling components o to the filter.10
- 3. Take special care in the application of insulation to refrigerant lines in order to minimize the transmission of sound to the structure.10
- 4. When applying insulation material to the suction line, refrigerant lines should be supported as illustrated in Figure 5. DO NOT allow any friction contact between metal piping.10
- 5. Use PVC piping as conduit in all underground installations. See Figure 6. Underground lines should be kept as short as possible in order to minimize the accumulation of liquid refrigerant in the suction line during extended system shutdown periods.10
- 6. In an effort to reduce vibrations and to retain some degree of flexibility, place a type of sealant material like permagum or similar around refrigerant lines that must be directed through walls.10
Precautionary Measures During Line Brazing12
Precautionary Measures During Service Valve Brazing12
- 1. Remove the Schraeder core taps from both service ports of liquid and suction lines’ service valves on the outdoor unit. Connect low pressure nitrogen flow to the service port of the liquid line.12
- 2. Weld the liquid line to the liquid valve on the outdoor unit. Do not forget to wrap the body of the valve with a wet cloth. Continue to allow the flow of nitrogen.12
- 3. Protect the suction valve with a wet cloth and braze the suction line connection to the outdoor unit. The flow of nitrogen should be leaving the system from the service port connection of the suction line. When this connection has cooled, remove t...12
- 4. Replace the Schraeder core once more onto the liquid and suction valves.13
- 5. Carry out leak tests on all refrigerant line connections, including tapered valves at the service port to ensure they are all leak-free. DO NOT OVERTIGHTEN (between 40 and 60 in.lbs maximum).13
- 6. Purge suction line, evaporator, and liquid line at 350 microns or less. Consult Data Sheet to learn the appropriate sizing of liquid line.13
- 7. Replace taps once more onto service ports. Do not remove tapered caps of service ports unless absolutely necessary for system service tasks.13
- 8. Release the refrigerant charge inside the system. Open both liquid and suction valves; remove the plunger/piston cap and insert a hex wrench over the stem in order to turn it counterclockwise until said valve stem reaches the angled retention wall.13
- 9. Replace the plunger/piston cap once more and tighten with your fingers; give it an additional 1-1/2 turn with your fingers. The cap should be placed in order to prevent leaking.13
Interconnecting Lines13
- Suction and Liquid Lines13
- Maximum Length for Lines13
- Vertical Rise14
  - 1. DO NOT exceed vertical rise as indicated in Table 3.14
  - 2. It is recommended to use the smallest allowable size for liquid line in order to minimize system charge. This will maximize compressor reliability.14
Installation of TXV Valve15
Evacuation16
Line Sizing16
General Information and Grounding17
Power Wiring of Field Connections17
- 1. Install properly sized and weather proof disconnect switch outdoors and close to the unit.17
- 2. Remove retaining screws on the side of the corner panel. Slide corner panel downwards to remove it. See Figure 12.17
- 3. Run power wiring from the disconnect switch to the unit17
- 4. Direct cables from the disconnect point through the opening provided for power wiring and towards the interior of the unit’s main control box.17
- 5. Install properly sized time delay fuses or circuit breaker, and conduct power supply connections.17
- 6. To save time, energize the crankcase heater (if equipped) through the reheating of compressor oil while the remaining the remaining installation steps continue to proceed.17
Control Logic Description19
Sensor19
Sensor Description19
Defrost Description (Heat Pump Only)20
- 1. When temperature differential (Delta T) between outdoor temperature (T4) and coil temperature (T3) reaches a duration of 5 minutes, that is:20
- 2. When minimum time of operation (MRT) based on outdoor temperature is for example:20
- 3. When saturation temperature descends below 82ºF during a period of 20 minutes.20
- 1. When outdoor coil temperature (T3) reaches 64ºF during a period of 1 minute or when defrost period exceeds 8 minutes.20
- 2. The adjustment of SW5 switch offers various defrost cycle options depending upon geographical conditions and/or outdoor area conditions.20
- Manual Defrost (Heat Pump Only)21
Compressor Crankcase Heater Description21
- 1. When the application of line tension for the first time and compressor discharge temperature is T5˂104ºF.21
- 2. During the defrost process.21
- 3. When compressor stops operating during a period of 4 hours and outdoor temperature is T4˂50ºF or T5˂104ºF.21
- 1. When compressor discharge temperature is T5 ≥ 113ºF.21
- 2. During heating mode and stops working during cooling mode.21
Protection Functions22
Refrigerant Charge Review23
- Weigh-in Method (use of electronic scale)23
Final Leak Test27
Manintenance27
- 1. Prevent the accumulation of dirt in the indoor unit or in the outdoor coils and in any other parts of the air-conditioning system circuit. Cleaning methods should be exercised frequently to maintain the unit under a clean state. Use appropriate br...27
- 2. Outdoor fan motor is permanently lubricated and does not require periodic oiling.27
- 3. Refer to heater and air handler instructions for filter and fan motor maintenance.27
- 4. Carry out regular inspections of the indoor coil and drain pan to ensure appropriate operation.27
Operational and Verification Procedures32
- For model 24/36k33

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