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Table of Contents
- 1 Table of Contents
- 2 Inspect New Unit
- 3 Safety Considerations
- 4 Location
- 5 Unit Support
- 6 Refrigeration System
- 7 Electrical Wiring
- 8 Start−Up Procedure
- 9 Refrigerant Charge
- 10 Sequence of Operation
- 11 Troubleshooting
- 12 Maintenance
- 13 Comfort Alertt Diagnostics Codes
- 14 R−410A Quick Reference Guide
- Download this manual
INSTALLATION INSTRUCTIONS
R−410A Split System Air Conditioner
These instructions must be read and understood completely before attempting installation.
DANGER, WARNING, CAUTION, and
NOTE
The
signal
words
CAUTION, and NOTE are used to identify levels of
hazard seriousness. The signal word DANGER is
only used on product labels to signify an immediate
hazard. The signal words WARNING, CAUTION,
and NOTE will be used on product labels and
throughout this manual and other manuals that may
apply to the product.
DANGER − Immediate hazards which will result in
severe personal injury or death.
WARNING − Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION − Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE − Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.
TABLE OF CONTENTS
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Clearances
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N4A3, C4A3, H4A3, T4A3,
NXA6, CXA6, HXA6, TXA6
Safety Labeling and Signal Words
DANGER,
WARNING,
2
2
2
2 − 3
4
5 − 9
10 − 11
12
12 − 15
16
16
16
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17
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18
Signal Words in Manuals
The signal word WARNING is used throughout this
manual in the following manner:
WARNING
WARNING
!
The signal word CAUTION is used throughout this
manual in the following manner:
CAUTION
!
Signal Words on Product Labeling
Signal words are used in combination with colors
and/or pictures on product labels.
WARNING
!
DEATH, PERSONAL INJURY, AND/OR PROPERTY
DAMAGE HAZARD
Failure to carefully read and follow this warning
could result in equipment malfunction, property
damage, personal injury and/or death.
Installation or repairs made by unqualified per-
sons could result in equipment malfunction,
property damage, personal injury and/or death.
The information contained in this manual is in-
tended for use by a qualified service technician fa-
miliar with safety procedures and equipped with
the proper tools and test instruments.
Installation must conform with local building
codes and with the National Electrical Code
NFPA70 current edition or Canadian Electrical
Code Part 1 CSA C.22.1.
421 01 5103 00
May 2010
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Table of Contents
Related Manuals for Tempstar NXA6
Summarization of Contents
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
Explains hazard levels and their meaning.
Signal Words in Manuals
Defines usage of signal words within the installation manual.
Signal Words on Product Labeling
Describes signal word usage on product labels with colors/pictures.
General Safety Warnings
Hazard Warning: Unqualified Personnel & Codes
Warns against installation by unqualified persons and stresses code compliance.
Inspect New Unit
Initial Inspection and Damage Notification
Check for hidden damage and notify the carrier if found.
Safety Considerations
Qualified Installer and Authorized Kits
Emphasizes using qualified personnel and factory authorized accessories.
Safe Handling and PPE
Proper lifting, handling sharp edges, and wearing safety gear.
Electrical Shock Hazard
Warning to turn off power before servicing and use lockout/tagout.
R-410A System Pressure Caution
Caution about R-410A higher pressures and using rated equipment.
Location Requirements
Site Selection Criteria
Positioning unit away from vents, bedrooms, and heat sources.
Air Recirculation and Roof Mounting
Avoiding confined areas and notes on roof installations.
Clearance Requirements
Minimum Airflow Clearances
Specifies minimum distances for discharge and intake air.
Object and Side Clearances
Guidelines for clearances around walls, fences, and posts.
Unit Support and Installation
Ground Level Installation
Ensuring the unit is level and properly supported on a pad or platform.
Roof Top Installation Guidance
Recommendations for roof mounting, stability, and noise.
Securing the Unit
Methods for fastening the unit down as per local codes or requirements.
Support Hazard: Vibration and Stress
Caution that inadequate support can cause damage and failure.
Refrigeration System Components
Component Compatibility Check
Verifying correct outdoor/indoor coils and metering devices.
TXV Installation Procedure
Step-by-step guide for installing a TXV.
Indoor Piston Installation Procedure
Steps for installing an indoor piston metering device.
TXV Hazard: Compressor Start Components
Caution regarding start capacitors/relays for TXV systems.
Refrigerant Line Set Requirements
Line Set Sizing and Length Limits
Proper sizing for efficiency and oil return, max length 200 ft.
Vertical Separation and Tubing Type
Max vertical separation and use of copper tubing.
Routing and Suspending Lines
Guidelines for running lines to avoid contact and noise transmission.
Unit Hazard: Moisture Contamination
Caution on system exposure to atmosphere and moisture.
Refrigerant Line Set Installation Details
Buried Line Set Vertical Rise
Requirement for a vertical rise if any line set section is buried.
Outdoor Unit Height and Oil Return
Maintaining oil return with suction gas velocity at height differences.
Liquid Line Filter-Drier Installation
Optimal placement and arrow direction for the filter-drier.
Service Valve Operations
How to open and close service valves, and their function.
Brazing Procedure and Fire Hazard
Steps for brazing, removing refrigerant, and fire prevention.
Brazing Alloy and TXV Protection
Using correct alloys and protecting the TXV during brazing.
System Evacuation
Evacuation Importance and Methods
Stressing evacuation and warning against using the compressor.
Deep Vacuum Evacuation Method
Procedure for pulling vacuum to 500 microns.
Triple Evacuation Method Procedure
Alternative method for evacuation using nitrogen.
Opening Service Valves and Gauge Ports
Opening Service Valves Sequence
Correct order (suction first) and method for opening valves.
Gauge Port Leak Check
Checking gauge ports for leaks and tightening caps.
Electrical Wiring and Connections
Electrical Shock Hazard Warning
Emphasizes turning off power before any electrical work.
Supply Voltage and Wire Type Requirements
Voltage, frequency, and conductor material specifications.
Grounding Procedure
Requirements for proper permanent unit grounding.
Wiring Connections and Routing
How to route and connect power and thermostat wiring.
Start-Up Procedure
Initial Setup and Energizing
Setting thermostat, turning on disconnects, energizing heater.
Cooling Operation and Charge Check
Running unit for 15 minutes before checking charge.
Refrigerant Charge Adjustment
Charge Amount and Methods
Factory charge, subcooling for TXV, superheat for piston.
Favorable Charging Conditions
Recommended ambient and indoor temperatures for accurate charging.
Charge Adjustment Process
How to add or remove refrigerant based on readings.
Refrigerant Charging Methods
TXV Unit Charging (Subcooling)
Detailed steps for charging TXV units using subcooling.
Piston Unit Charging (Superheat)
Detailed steps for charging piston units using superheat.
Sequence of Operation
Cooling Mode Operation Flow
How the system components activate during cooling.
Troubleshooting with Comfort Alert
Comfort Alert Diagnostics Overview
Introduction to the Comfort Alert device and its monitoring function.
Maintenance Procedures
Condensate Drain Cleaning
Monthly checks for free flow and cleaning.
Coil and Unit Cleanliness Tips
Maintaining airflow and preventing debris buildup.
R-410A Quick Reference Guide
R-410A Properties and Compatibility
Higher pressures, cylinder color, POE oil compatibility.
Service Equipment and Practices
Manifold sets, hoses, leak detectors, brazing cloth.
System Handling and Safety Precautions
Vacuum, venting, avoiding atmosphere, and general warnings.
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