Contents
Important
Safety Information ............................................. 3
General Information ........................................4-7
Checking Product Received ........................................4
Application ...................................................................4
Electrical and Physical Data ..................................... 5-6
Specifications ...............................................................7
Proper Installation ........................................................7
Installation .................................................... 8-19
Choosing a Location ......................................8-10
Operational Issues........................................................8
Corrosive Environment .................................................8
For Units With
Space Limitations .........................................................9
Customer Satisfaction Issues ......................................9
Unit Mounting ...............................................................9
Factory-Preferred
Tie-Down Method.........................................................9
Snow Depth Table ......................................................10
Tools and Refrigerant .......................................11
Tools Required for Installing and
Servicing R-410A Models ..........................................11
Specifications of R-410A ...........................................11
Quick-Reference
Guide for R-410A .......................................................11
Replacement Units ...........................................12
Indoor Coil ........................................................12
Location ......................................................................12
Interconnecting Tubing ................................ 12-26
Refrigerant Level Adjustment .....................................12
Maximum Length of Lines ..........................................12
Outdoor Unit Installed
Above or Below Indoor Coil ................................. 13-26
Tubing Installation ......................................................24
Tubing Connections ...................................................25
Leak Testing ...............................................................26
Wiring .........................................................27-28
Control Wiring ............................................................27
Conventional 24 VAC
Thermostat Control Wiring .........................................27
Typical Thermostat Wiring Diagrams .........................27
Power Wiring ..............................................................28
Grounding ...................................................................28
Start-Up ......................................................29-33
Start-Up ...................................................................... 29
Checking Airflow ........................................................29
Evacuation Procedure ............................................... 30
Final Leak Testing .......................................................30
Checking
Refrigerant Charge ...................................... 31-33
Charging Units
With R-410A Refrigerant ............................................31
Confirm ID Airflow
and Coils Are Clean ...................................................31
Measurement Device Setup .......................................31
Charging by Weight ....................................................31
Gross Charging by Pressures ....................................32
Final Charge by Subcooling .......................................32
Finishing Up Installation .............................................33
Components and Controls ............................... 34
Compressor
Crankcase Heat (CCH) ......................................34
Hard-Start Components ....................................34
High- and Low-Pressure
Controls (HPC and LPC) ....................................34
Demand Defrost ................................................... 35-36
Accessories ..................................................... 37
Remote Outdoor
Temperature Model ....................................................37
Low Ambient Control (LAC) ...................................... 37
Diagnostics ................................................ 38-40
Cooling Mechanical
Checks Flowchart ..................................................... 38
Heating Mechanical
Checks Flowchart ..................................................... 39
Defrost Mechanical
Checks Flowchart ..................................................... 40
General Troubleshooting Chart ...... ...........................41
Service Analyzer Charts ....................................... 42-46
Cooling/Heating Tips .............................................................47
Wiring Diagrams ........................................ 48-50
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CONTENTS