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Summary of Contents for Johnson Controls YC4 Series
- Page 1 Installation Manual: R-454B Outdoor Split-System Air Conditioner YC4, XC4, RC4, YC3, XC3, RC3, YC6, XC6 and RC6 Series York International Corporation, 5005 York 6411591-UIM-B-0824 Drive, Norman, OK 73069 Supersedes: 6411591-UIM-A-0324 2024-08-15 Johnson Controls Ducted Systems...
- Page 2 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 3: Table Of Contents
General information and grounding the unit.................. 33 Completing the field power wiring connections................34 Completing the field control wiring connections................35 Control wiring............................. 36 Charging the system............................39 Measuring indoor airflow........................40 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 4 Starting up the system..........................44 Instructing the user............................45 Maintenance and repair........................45 Required procedures for A2L systems....................46 Decommissioning..........................46 Third-party trademarks notice........................47 Wiring diagrams............................. 48 Start-up sheet..............................53 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 5: About The Unit
Certification DS Solutions App Johnson Controls believes in empowering our customers with unit-specific information at all times. Download the Ducted Systems Solutions Mobile App (DS Solutions App), which is available through the App Store for iOS and Google Play for Android. Users can use the DS Solutions App to scan the QR code located on the rating plate that is unique to each unit and provides information specific to the product. -
Page 6: Safety
This product must be installed in strict compliance with the enclosed installation instructions and any applicable local, state, and national codes including but not limited to building, electrical, and mechanical codes. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 7 Tabular Data Sheet included with the outdoor unit, access the current version of the Tabular Data Sheet on the Residential Equipment & Supplies section at www.simplygettingthejobdone.com or scan the QR code provided on the outdoor unit rating plate. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 8: A2L Refrigerant Safety Considerations
Before conducting any work, survey the area around the equipment ito ensure that there are no flammable hazards or ignition risks. Display “No Smoking” signs. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 9: Room Size Requirements
Table 2: Minimum room area System charge (lb-oz) Minimum room area Minimum total Minimum system airflow (CFM) conditioned area (ft 4-12 5-12 6-12 7-12 8-12 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 10 Minimum room area refers to the smallest air conditioned room on the lowest floor of the residence. • Minimum total conditioned room area refers to the combined area of all air conditioned rooms in the residence. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 11: Mechanical Ventilation
Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 12: Electrical Devices Checks
Remove refrigerant according to the Removal and evacuations section of the outdoor unit's Installation Manual. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 13: Wiring Installation
Note: The 10-pin mitigation harness is included in the loose parts kit. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 14 When the system is in standby mode, repeat the above test for a W call for heating. When testing is complete, re-install the front cover on the control box. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 15: Installation Overview
Complete all of the stages outlined in Installation overview. You may not need to perform tasks indicated with a dashed outline, depending on the specific installation. Figure 4: Installation overview Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 16: Preparing For Installation
Allows you to elevate the unit sufficiently to prevent any blockage of the air entrances by snow in areas where snow may accumulate. Check the local weather bureau for the expected snow accumulation in your area. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 17: Inspecting The Unit
Note the extent of any damage on the carrier's receipt. b. Make a separate written request for the carrier's agent to inspect the unit. c. Contact the local distributor for more information. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 18: Understanding Installation And Operation Limitations
Install refrigerant pipes and components in locations where they are unlikely to be exposed to corrosive substances, unless the components are made from corrosion-resistant materials or adequately protected against corrosion. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 19: Installing The Outdoor Unit
Install the unit in as level a position as possible while maintaining the clearances shown in Figure 5 Figure Fasten the outdoor unit tightly to prevent noise. Figure 5: Typical installation clearances Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 20: Mounting The Outdoor Unit On A Wall
When installing this unit as a replacement for an existing R-454B unit, you must replace the outdoor unit, indoor coil, and metering device. Complete all of the steps outlined to ensure correct system operation and performance. Replace the refrigeration piping where possible. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 21 Setting the outdoor unit on the ground or on a roof Mounting the outdoor unit on a wall. Replace the refrigeration piping when replacing an R-410A unit with an R-454B unit to reduce cross-contamination of oils and refrigerants. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
- Page 22 If the pressure drop exceeds 3 psig, replace both the suction-line and liquid-line driers. After a total of 10 h runtime where the suction-line pressure drop has not exceeded 3 psig, replace the liquid-line drier, and remove the suction-line drier. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 23: Installing The Refrigerant Piping
Use clean hard-drawn copper tubing where no appreciable amount of bending around obstruction is necessary. If you must use soft copper, make sure to avoid sharp bends that may cause a restriction. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 24 Figure 8: Underground installation • Pack fiberglass insulation and a sealing material such as permagum around refrigerant lines where they penetrate a wall to reduce vibration and retain some flexibility. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 25: Installing The Liquid Line Filter-Drier
Find a suitable location on the liquid line near the indoor unit. Install the liquid-line filter drier in accordance with the installation instructions for the liquid- line filter drier. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 26: Brazing The Refrigerant Lines And Service Valves
Wrap a wet rag around the service valve to prevent heat damage, as shown in Figure • Protect items such as painted surfaces and insulation during brazing. • After brazing, cool the joint with a wet rag. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 27: Installing The Thermostatic Expansion Valve (Txv)
TXV kit and the indoor coil. Install the TXV kit as follows: Important: Refer to the Technical Guide or Tabular Data Sheet for the unit to determine the correct TXV kit to use on this product. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 28 Hand tighten the liquid line and apply an additional quarter turn to seal. CAUTION The Schrader valve core must not be installed into the suction line TXV equalizer line fitting. Poor system performance or system failure could result. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
- Page 29 Mount the TXV temperature sensing bulb after the vapor line is brazed and sufficiently cooled. Failure to use a suction-line split grommet may result in TXV failure. Figure 11: TXV bulb and equalizer line installation Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 30: Checking For Refrigerant Leaks
Do not use the system refrigerant in the outdoor unit to purge or leak test. Pressurize the refrigerant piping and the indoor coil to 250 psig with dry nitrogen. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 31: Evacuating The Refrigerant Lines And Indoor Coil
Always recover the refrigerant charge into the correct recovery cylinders. • Ensure that cylinders are labeled for the recovered refrigerant, and they have pressure-relief valves and working shut-off valves. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 32: Releasing Refrigerant Into The System
Replace the service valve cap finger tight, then tighten an additional 1/12 turn (1/2 hex flat). Replace the cap to prevent leaks. See for checking and recording system charge. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 33: Connecting The Wiring
Wire size must be sized following NEC requirements. • The complete connection diagram and schematic wiring label is located on the inside surface of the unit service access panel. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 34: Completing The Field Power Wiring Connections
Figure 14, and Figure Install the correct size time-delay fuses or circuit breaker, and make the power supply connections. Figure 14: Outdoor unit control box (single-phase - smaller base) Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 35: Completing The Field Control Wiring Connections
Replace the control box cover removed in Step 2 of the procedures. All field wiring to be in accordance with national electrical codes (NEC) or local city codes. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 36: Control Wiring
Control wiring Figure 17: Control wiring - standard ECM air handler and standard single-stage air conditioner - conventional wiring Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 37 Figure 19: Control wiring - standard ECM air handler and standard multi-stage air conditioner - conventional wiring Figure 20: Control wiring - standard ECM gas furnace and standard multi-stage air conditioner - conventional wiring Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
- Page 38 Note: • YEL = Y1 (24V 1st stage compressor) • YEL/RED = Y2 (24V 2nd stage compressor) • BLU = 24V common Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 39: Charging The System
This can cause damage to the compressor or other components. CAUTION Refrigerant charging must only be carried out by a qualified air conditioning contractor. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 40: Measuring Indoor Airflow
On a single-piece air handler, take a second reading in the supply air duct outside of the unit. On a gas furnace, take the second reading after the heat exchanger but before the indoor coil. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 41: Determining The Total System Charge
Use this method whenever additional refrigerant is required for the system charge. If a calibrated charging cylinder or accurate weighing device is available, add refrigerant accordingly. Otherwise, model-specific charging charts are provided on the access panel of the unit. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 42: Charging The Indoor Txv In Subcooling Mode
It is unlawful to knowingly vent, release, or discharge refrigerant into the open air during repair, service, maintenance, or the final disposal of this unit. R-454B saturation properties Table 10: R-454B saturation properties Temperature Liquid pressure Vapor pressure °F psig psig Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 43: Optional Cold Weather Charging
If the temperature is out of range, adjust the windows by opening or closing them. 11. When the condition inside the charging tent is stabilized, follow the procedures to adjust charge in the unit. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 44: Starting Up The System
Check to ensure that the service base valves of the outdoor unit are fully open. Check to ensure that the electric wires are fully connected. Use the thermostat to turn on the system. Make sure that the system is operating correctly. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 45: Instructing The User
CAUTION Be aware that equipment malfunction may be due to refrigerant loss and potential leaks. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 46: Required Procedures For A2L Systems
Follow the steps below to ensure the unit is correctly and safely decommissioned: Isolate the system electrically. Connect a recovery machine to remove refrigerant from the system. Ensure that the cylinder is situated on the scales before recovery takes place. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 47: Third-Party Trademarks Notice
For appliances containing flammable refrigerants, ensure that there are labels on the equipment stating that the equipment contains a flammable refrigerant. Third-party trademarks notice Third-Party Trademarks Notice: For information about third-party trademarks, refer to the relevant company websites. Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... -
Page 48: Wiring Diagrams
Wiring diagrams Figure 21: Wiring diagram - single-phase 13.4 SEER2 and 14.3 SEER2 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 49 Figure 22: Wiring diagram - single-stage 16 SEER2 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
- Page 50 Figure 23: Wiring diagram - two-stage Copeland compressor 16 SEER2 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
- Page 51 Figure 24: Wiring diagram - two-stage LG compressor 16 SEER2 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
- Page 52 Figure 25: Wiring diagram - three-phase 13.4 SEER2 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems...
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Page 53: Start-Up Sheet
Start-up sheet Figure 26: Start-up sheet - page 1 Installation Manual: R-454B Outdoor Split-System Air Conditioner Johnson Controls Ducted Systems... - Page 54 Figure 27: Start-up sheet - page 2 Subject to change without notice. Published in U.S.A. Copyright © 2024 by Johnson Controls. All rights reserved. Johnson Controls Ducted Systems...
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