Nortek JS4BD-KA User Manual

SPLIT SYSTEM AIR CONDITIONER
INSTALLATION INSTRUCTIONS
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
Connecting Refrigerant Tubing between the
Indoor & Outdoor Unit ........................................... 4
ELECTRICAL WIRING ...........................................4
Pre - Electrical Checklist ....................................... 4
Line Voltage ...........................................................4
Comfort Alert
TM
Diagnostics Module .....................5
24VAC Power Wiring ...........................................5
Thermostat Demand Wiring ................................5
Interpreting the Diagnostic LED’s .......................5
LED Description .................................................. 6
Grounding .............................................................6
Reverse Rotation Verification ................................ 6
Unbalanced 3-Phase Supply Voltage ....................6
Thermostat Low / Voltage Connections ................. 7
STARTUP & ADJUSTMENTS ...............................7
Pre - Start Checklist .............................................. 7
Start-up Procedures ..............................................7
Air Circulation - Indoor Blower ..............................7
System Cooling .....................................................7
System Heating .....................................................7
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
IMPORTANT
ATTENTION INSTALLERS:
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.
S4BD - 018, 024, 030, 036, 042, 048, & 060 (1.5, 2, 2.5, 3, 3.5, 4, & 5 Ton) Series
13 SEER, SINGLE & 3-PHASE MODELS
Refrigerant Charging .............................................7
Charging the Unit in AC Mode with
Outdoor Temperatures Above 55° F ......................8
AIR CONDITIONER MAINTENANCE ....................8
COMPONENT FUNCTIONS .................................. 8
CHARGING TABLES & CHARTS ..........................9
Table 3. Charging Table for 1.5 Ton Units .......... 10
Table 4. Charging Table for 2 Ton Units ............. 10
Table 5. Charging Table for 2.5 Ton Units .......... 10
Table 6. Charging Table for 3 Ton Units ............. 11
Table 7. Charging Table for 3.5 Ton Units .......... 11
Table 8. Charging Table for 4 Ton Units ............. 11
Table 9. Charging Table for 5 Ton Units ............. 12
Figure 3. Charging Chart for 1.5 Ton Units ........ 12
Figure 4. Charging Chart for 2 Ton Units ........... 13
Figure 5. Charging Chart for 2.5 Ton Units ........ 13
Figure 6. Charging Chart for 3 Ton Units ........... 14
Figure 7. Charging Chart for 3.5 Ton Units ........ 14
Figure 8. Charging Chart for 4 Ton Units ........... 15
Figure 9. Charging Chart for 5 Ton Units ........... 15
ELECTRICAL DIAGRAMS & TABLES ................ 16
Figure 10. W.D., Single Phase (1.5 - 5 Ton) ...... 16
Figure 11. W.D., 3-Phase, (3, 4, & 5 Ton) .......... 17
Table 10. Comfort Alert LED Diagnostics .......... 18
Table 11. Module Wiring Troubleshooting .......... 19
INSTALL. / PERFORMANCE CHECKLIST ......... 20
REPLACEMENT PARTS ...................................... 20

Nortek JS4BD-KA Specifications

General

Brand	Nortek
Model	JS4BD-KA
Category	Air Conditioner
Language	English

Summary

Important Safety Information

General Safety Warnings and Precautions

Covers essential safety warnings, cautions, and electrical safety standards for installation and servicing.

Refrigerant Handling and System Safety

Specific safety guidelines for handling R410A refrigerant and system operation to prevent injury or damage.

Air Conditioner Installation Procedures

General Information and Pre-Installation Checks

Covers unit purpose, maintenance, general information, and pre-installation verification steps.

Unit Location and Mounting Requirements

Specifies ground level and roof mount installation criteria, clearances, and pad requirements.

Refrigerant Tubing and Electrical Wiring

Connecting Refrigerant Tubing Between Units

Details on brazing, routing, supporting refrigerant lines, and maximum lengths for system integrity.

Electrical Wiring Compliance and Pre-Checks

Covers electrical codes, supply verification, pre-wiring checklist, and line voltage considerations.

Line Voltage and Connections

Specifies line voltage requirements, connections, and the need for a visible disconnect switch.

Electrical System Details and Diagnostics

24 VAC Power and Thermostat Wiring for Module

Instructions for wiring the Comfort Alert module power and thermostat demand signal.

Comfort Alert Diagnostics Module Overview

Explanation of the Comfort Alert module's function, installation, and capabilities for troubleshooting.

Interpreting Diagnostic LED Codes

Guide to understanding LED flash codes for diagnosing system failures.

Grounding and Compressor Rotation Verification

Procedures for proper unit grounding and checking compressor rotation direction.

Unbalanced 3-Phase Supply Voltage Analysis

Method for determining voltage imbalance and its impact on motor performance.

Startup, Adjustments, and Refrigerant Charging

Thermostat Connections and Startup Checklist

Covers thermostat wiring, mounting, and essential pre-start system checks before operation.

System Startup Procedures for Cooling and Heating

Steps for verifying indoor blower, system cooling, and optional heating operation.

Refrigerant Charging Procedures and Warnings

Essential steps and safety warnings for system refrigerant charging.

Air Conditioner Maintenance

Routine Maintenance Tasks

Guidelines for regular maintenance like filter replacement, coil cleaning, and electrical checks.

Component Functions

Comfort Alert Diagnostics Module Functionality

Detailed overview of the Comfort Alert module's role in troubleshooting system failures.

Pressure Switch Functions

Explains the operation and purpose of High and Low-Pressure Switches.

Refrigerant Charging Tables and Charts

Application Notes for Charging Charts

Guidance on using charging charts, understanding legended data, and system operation notes.

Orifice Match Refrigerant Charging Tables

Tables providing liquid pressure and temperature for various tonnage units with orifice matches.

TXV Match Refrigerant Charging Charts

Graphical charts illustrating liquid pressure vs. temperature for TXV systems by tonnage.

Electrical Diagrams and Tables

Single Phase Wiring Diagram

Detailed wiring schematic for single-phase S4BD models.

Three Phase Wiring Diagram

Detailed wiring schematic for three-phase S4BD models.

Comfort Alert Troubleshooting

LED Diagnostics Table

Table correlating LED status codes to potential system issues and troubleshooting steps.

Module Wiring Troubleshooting

Information on identifying miswired modules and resolving incorrect diagnostic code displays.

Installation and Performance Checklist

Replacement Parts Information

Guidance on how to obtain replacement parts using unit model and serial numbers.