Nortek FS4BD-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
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
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 SERIES - 018, 024, 030, 036, 042, 048, & 060 (1.5, 2, 2.5, 3, 3.5, 4, & 5 Ton)
13 SEER, SINGLE PHASE MODELS
Refrigerant Charging ............................................. 7
Charging the Unit in AC Mode with
Outdoor Temperatures Above 55° F ...................... 8
Application Notes for Using Charging Charts ....... 8
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
INSTALL. / PERFORMANCE CHECKLIST ......... 20
REPLACEMENT PARTS ...................................... 20

Nortek FS4BD-KA Specifications

General

Brand	Nortek
Model	FS4BD-KA
Category	Air Conditioner
Language	English

Summary

Important Safety Information

General Safety Warnings and Precautions

Essential safety guidelines, warnings, and cautions for installation and service.

Air Conditioner Installation

General Information

Overview of the unit's design, intended use, and maintenance recommendations.

Pre-Installation Steps

Key checks before installing, including load calculation and electrical supply verification.

Outdoor Unit Location Criteria

Guidelines for selecting an optimal location for the outdoor unit, considering airflow and obstructions.

Packaging Removal and Inspection

Instructions for safely removing packaging and inspecting the unit for shipping damage.

Ground Level Mounting

Requirements for installing the unit on a ground-level pad, including height and drainage.

Roof Mount Installation

Guidelines for structurally sound roof mounting, ensuring load support and noise reduction.

Electrical Wiring

Refrigerant Tubing Installation

Proper routing, connection, and support of refrigerant lines between units.

Pre-Wiring Electrical Checks

Checklist for verifying voltage, frequency, and supply adequacy before electrical connections.

Line Voltage and Supply

Instructions for connecting line voltage, including disconnects and dedicated circuits.

Grounding Requirements

Proper grounding procedures to ensure safety and prevent electrical hazards.

Comfort Alert Diagnostics Module

Module Function and Wiring

Overview of the module, 24VAC power supply, and thermostat demand signal wiring.

Interpreting Diagnostic LED Indicators

Understanding the meaning of LED flash codes for system troubleshooting.

Thermostat Connection Guidelines

Proper low-voltage wiring and thermostat mounting recommendations.

Air Conditioner Maintenance

Routine Maintenance Tasks

Guidance on routine maintenance tasks for optimal performance and longevity.

Startup and Adjustments

Pre-Start Checklist

Final checks before energizing the system to ensure correct installation.

System Startup Procedures

Steps for starting up the blower, cooling, and heating modes, including initial checks.

Refrigerant Charging

AC Mode Charging Procedure

Step-by-step process for charging the unit in AC mode based on pressure and temperature.

Using Refrigerant Charging Charts

Guidelines and notes for accurately using charging charts for system optimization.

Refrigerant Charging Tables

Charging Data for 1.5 to 5 Ton Units

Tables providing pressure and temperature data for various unit sizes and outdoor temperatures.

Electrical Diagrams and Tables

Outdoor Unit Wiring Diagram

Visual representation of the electrical connections for the outdoor unit.

Comfort Alert Troubleshooting

LED Diagnostic Codes

Table detailing LED status and corresponding troubleshooting information for system faults.

Module Wiring Troubleshooting

Guidance for resolving issues related to module wiring and misconfigurations.

Installation and Performance Check List

Replacement Parts Information

Information on how to order replacement parts for the unit.