Johnson Controls YC4 Series - Table of Contents

Contents
Contents
About the unit...................................................................................................................................................5
Certification.......................................................................................................................................................5
DS Solutions App.............................................................................................................................................. 5
Safety................................................................................................................................................................. 6
Understanding safety symbols and instructions...............................................................................6
Safety requirements..............................................................................................................................6
A2L refrigerant safety considerations.................................................................................................8
General.......................................................................................................................................................... 8
Room size requirements............................................................................................................................. 9
Mechanical ventilation...............................................................................................................................11
Refrigerant equipment checks................................................................................................................. 11
Electrical devices checks............................................................................................................................12
Detection of refrigerant............................................................................................................................ 12
Wiring installation...................................................................................................................................... 13
Installation overview......................................................................................................................................15
Preparing for installation.............................................................................................................................. 16
Selecting a location for installation................................................................................................... 16
Inspecting the unit.............................................................................................................................. 17
Understanding installation and operation limitations....................................................................18
......................................................................................................................................................................18
Meeting requirements for A2L equipment.......................................................................................18
Installing the outdoor unit............................................................................................................................19
Setting the outdoor unit on the ground or on a roof..................................................................... 19
Mounting the outdoor unit on a wall................................................................................................20
Installing the outdoor unit as a replacement unit...........................................................................20
Installing the refrigerant piping...................................................................................................................23
Installing the vapor and liquid lines..................................................................................................23
Installing the liquid line filter-drier....................................................................................................25
Brazing the refrigerant lines and service valves..............................................................................26
Installing the thermostatic expansion valve (TXV).......................................................................... 27
Checking for refrigerant leaks........................................................................................................... 30
Evacuating the refrigerant lines and indoor coil............................................................................. 31
Releasing refrigerant into the system...............................................................................................32
Connecting the wiring................................................................................................................................... 33
General information and grounding the unit.................................................................................. 33
Completing the field power wiring connections..............................................................................34
Completing the field control wiring connections............................................................................ 35
Control wiring.............................................................................................................................................36
Charging the system......................................................................................................................................39
Measuring indoor airflow................................................................................................................... 40
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