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SPLIT SYSTEM AIR CONDITIONER
INSTALLATION INSTRUCTIONS
S4BD SERIES - 018, 024, 030, 036, 042, 048, & 060 (1.5, 2, 2.5, 3, 3.5, 4, & 5 Ton)
IMPORTANT SAFETY INFORMATION ................. 2
AIR CONDITIONER INSTALLATION .................... 3
General Information .............................................. 3
Before You Install this Unit ..................................... 3
Locating the Air conditioner................................... 3
Packaging Removal .............................................. 3
Ground Level ......................................................... 3
Roof Mount............................................................ 3
Indoor & Outdoor Unit ........................................... 4
ELECTRICAL WIRING ........................................... 4
Pre - Electrical Checklist ....................................... 4
Line Voltage ........................................................... 4
Diagnostics Module ..................... 5
24VAC Power Wiring ........................................... 5
Thermostat Demand Wiring ................................ 5
Interpreting the Diagnostic LED's ....................... 5
LED Description .................................................. 6
Grounding ............................................................. 6
Thermostat Low / Voltage Connections ................. 6
AIR CONDITIONER MAINTENANCE .................... 6
STARTUP & ADJUSTMENTS ............................... 7
Pre - Start Checklist .............................................. 7
Start-up Procedures .............................................. 7
Air Circulation - Indoor Blower .............................. 7
System Cooling ..................................................... 7
System Heating ..................................................... 7
It is your responsibility to know this product better than your customer. This includes being able to install the product
according to strict safety guidelines and instructing the customer on how to operate and maintain the equipment for
the life of the product. Safety should always be the deciding factor when installing this product and using common
sense plays an important role as well. Pay attention to all safety warnings and any other special notes highlighted
in the manual. Improper installation of the furnace or failure to follow safety warnings could result in serious injury,
death, or property damage.
These instructions are primarily intended to assist qualified individuals experienced in the proper installation of this
appliance. Some local codes require licensed installation/service personnel for this type of equipment. Please read all
instructions carefully before starting the installation. Return these instructions to the customer's package for future
reference.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
REFRIGERANT CHARGING ................................. 7
S4BD CHARGING CHARTS ................................. 8
Figure 3. Charging Chart for 1.5 Ton Units .......... 8
Figure 4. Charging Chart for 2 Ton Units ............. 9
Figure 5. Charging Chart for 2.5 Ton Units .......... 9
Figure 6. Charging Chart for 3 Ton Units ........... 10
Figure 7. Charging Chart for 3.5 Ton Units ........ 10
Figure 8. Charging Chart for 4 Ton Units ........... 11
Figure 9. Charging Chart for 5 Ton Units ........... 11
S4BD CHARGING TABLES ................................. 12
Table 3. Charging Table for 1.5 Ton Units .......... 12
Table 4. Charging Table for 2 Ton Units ............. 12
Table 5. Charging Table for 2.5 Ton Units .......... 13
Table 6. Charging Table for 3 Ton Units ............. 13
Table 7. Charging Table for 3.5 Ton Units .......... 14
Table 8. Charging Table for 4 Ton Units ............. 14
Table 9. Charging Table for 5 Ton Units ............. 15
ELECTRICAL DIAGRAMS & TABLES ................ 16
Figure 10. W.D., Single Phase (1.5 - 5 Ton) ...... 16
Table 10. Comfort Alert LED Diagnostics .......... 17
Table 11. Module Wiring Troubleshooting .......... 18
INSTALLATION CHECKLIST .............................. 20
REPLACEMENT PARTS ...................................... 20
IMPORTANT
ATTENTION INSTALLERS:
13 SEER, SINGLE PHASE MODELS
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Summary of Contents for Nortek MSA4BD-KA
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Page 1: Table Of Contents
SPLIT SYSTEM AIR CONDITIONER 13 SEER, SINGLE PHASE MODELS INSTALLATION INSTRUCTIONS S4BD SERIES - 018, 024, 030, 036, 042, 048, & 060 (1.5, 2, 2.5, 3, 3.5, 4, & 5 Ton) IMPORTANT SAFETY INFORMATION ....2 REFRIGERANT CHARGING ......... 7 Charging the Unit in AC Mode AIR CONDITIONER INSTALLATION .... -
Page 2: Important Safety Information
IMPORTANT SAFETY INFORMATION INSTALLER: Please read all instructions before servicing WARNING: this equipment. Pay attention to all safety warnings and any other special notes highlighted in the manual. Safety markings are used frequently throughout this manual to The information listed below must be followed designate a degree or level of seriousness and should during the installation, service, and operation not be ignored. -
Page 3: Air Conditioner Installation
AIR CONDITIONER INSTALLATION Packaging Removal NOTE: To prevent damage to the tubing connections, General Information carefully remove the carton and user’s manual from the The S4BD series air conditioner is designed only for equipment. Discard the shipping carton. outdoor rooftop or ground level installations. This unit has been tested for capacity and efficiency in accordance Ground Level with AHRI Standards and will provide many years of safe... -
Page 4: Connecting Refrigerant Tubing Between The Indoor & Outdoor Unit
ELECTRICAL WIRING Connecting Refrigerant Tubing Between the Indoor & Outdoor Unit WARNING: CAUTION: To avoid risk of electrical shock, personal When servicing, cover or seal openings to injury, or death, disconnect all electrical power minimize the exposure of the refrigerant system to the unit before performing any maintenance to air to prevent accumulation of moisture and or service. -
Page 5: Comfort Alert Tm Diagnostics Module
• Provide power supply for the unit in accordance with the Comfort Alert Diagnostics Module unit wiring diagram, and the unit rating plate. Connect (Select Models Only) the line-voltage leads to the terminals on the contactor The Comfort Alert Diagnostics Module (Figure 2) is a inside the control compartment. -
Page 6: Interpreting The Diagnostic Led's
NOTES: Recommended T-Stat Wire • Factory installed modules have different thermostat Unit to T-Stat (Length in FT) Thermostat demand signal wiring. Always follow manufacturer Wire Gauge wiring instructions when replacing the module. 2-Wire 5-Wire (Heating) (Heating/Cooling) • After the thermostat demand signal is connected, verify that 24 VAC across Y &... -
Page 7: Startup & Adjustments
REFRIGERANT CHARGING START UP & ADJUSTMENTS Pre-Start Check List WARNING: √ Verify the indoor unit is level and allows proper condensate drainage. √ Verify the outdoor coil and top of the unit are free from S4BD Split System Air Conditioners are shipped obstructions and debris, and all equipment access/ charged with R410A refrigerant and ready control panels are in place. -
Page 8: Charging The Unit In Ac Mode
Charging the Unit in AC Mode refrigeration system with one capable of acid removal. (With outdoor temperatures above 65° F) After completing the repairs, evacuate the system to 1. With the system operating at steady-state, measure the 350 - 500 microns and weigh in the refrigerant to the liquid refrigerant pressure (in psig) at the outdoor unit amount specified on the unit rating label. - Page 9 Remove refrigerant when above the curve Add refrigerant when below the curve Liquid Temperature (F) Figure 4. Charging Chart for S4BD-024 Series (2 Ton Units) - TXV Matches NOTE: Do not add or remove refrigerant if pressure reading is between the curves. Remove refrigerant when above the curve Add refrigerant when below the curve Liquid Temperature (F)
- Page 10 Remove refrigerant when above the curve Add refrigerant when below the curve Liquid Temperature (F) Figure 6. Charging Chart for S4BD-036 Series (3 Ton Units) - TXV Matches NOTE: Do not add or remove refrigerant if pressure reading is between the curves. Remove refrigerant when above the curve Add refrigerant when below the curve Liquid Temperature (F)
- Page 11 Remove refrigerant when above the curve Add refrigerant when below the curve Liquid Temperature (F) Figure 8. Charging Chart for S4BD-048 Series (4 Ton Units) - TXV Matches NOTE: Do not add or remove refrigerant if pressure reading is between the curves. Remove refrigerant when above the curve Add refrigerant when below the curve Liquid Temperature (F)
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Page 12: S4Bd Charging Tables
S4BD REFRIGERANT CHARGING TABLES - COOLING ONLY LEGEND Shaded boxes indicate flooded conditions. Rated design values. The suction pressure will be lower than design value if outdoor air flow, entering dry bulb, or entering wet bulb temperatures are lower than design. NOTES: 1. - Page 13 LEGEND Shaded boxes indicate flooded conditions. Rated design values. The suction pressure will be lower than design value if outdoor air flow, entering dry bulb, or entering wet bulb temperatures are lower than design. NOTES: 1. All pressures are listed psig and all temperatures in °F 2.
- Page 14 LEGEND Shaded boxes indicate flooded conditions. Rated design values. The suction pressure will be lower than design value if outdoor air flow, entering dry bulb, or entering wet bulb temperatures are lower than design. NOTES: 1. All pressures are listed psig and all temperatures in °F 2.
- Page 15 LEGEND Shaded boxes indicate flooded conditions. Rated design values. The suction pressure will be lower than design value if outdoor air flow, entering dry bulb, or entering wet bulb temperatures are lower than design. NOTES: 1. All pressures are listed psig and all temperatures in °F 2.
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Page 16: Electrical Diagrams & Tables
ELECTRICAL DIAGRAMS & TABLES WIRING DIAGRAM Split System Air Conditioner (Outdoor Section) Single Phase NOTES: 1. Disconnect all power before servicing. 1. Couper le courant avant de faire letretien. 2. For supply connections use copper conductors only. 2. Employez uniquement des conducteurs en cuivre. 3. - Page 17 COMFORT ALERT TROUBLESHOOTING Status LED Status LED Description Status LED Troubleshooting Information POWER Module has power Supply voltage is present at module terminals (Green LED) • Compressor protector is open • Check for high head pressure • Check compressor supply voltage Thermostat demand signal Y TRIP •...
- Page 18 COMFORT ALERT TROUBLESHOOTING - CONTINUED Status LED Status LED Description Status LED Troubleshooting Information • Run capacitor has failed ALERT • Open circuit in compressor start wiring or connections Open Start Circuit Flash Code 6 — Check wiring and connectors between supply and the compressor S terminal Current only in run circuit (Yellow LED) •...
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Page 20: Installation Checklist
Blower Motor Fan Motor Components: Blower Assembly Fan Grille Cabinet Panels Filter/Driers Expansion Valves Specifications & illustrations subject to change without notice or incurring obligations (05/18). 709292D (Replaces 709292C) O’Fallon, MO, © Nortek Global HVAC LLC 2018. All Rights Reserved.
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