Print key ....................................................................................................................................................... 156

System switches key .................................................................................................................................... 159

Section 9 - Maintenance......................................................................................................................................161

General requirements ................................................................................................................................... 161

Leak testing during operation ....................................................................................................................... 162

Vapor connection locations........................................................................................................................... 162

Checking the system for leaks ..................................................................................................................... 162

Leak testing .................................................................................................................................................. 162

System pressure test .................................................................................................................................... 163

Conducting the gas pressure hold test ......................................................................................................... 163

What to do next ............................................................................................................................................ 163

Conducting the soap visual gas leak test ..................................................................................................... 163

Conducting the optional trace gas leak test ................................................................................................. 164

System evacuation ....................................................................................................................................... 165

Vacuum dehydration ..................................................................................................................................... 165

Dehydration .................................................................................................................................................. 166

Conducting the dehydration process ............................................................................................................ 167

Result ........................................................................................................................................................... 168

Conducting the final evacuation ................................................................................................................... 168

Result ........................................................................................................................................................... 168

Refrigerant charging ..................................................................................................................................... 168

Removing the refrigerant charge for service ................................................................................................ 171

Checking and trimming the refrigerant charge ............................................................................................. 172

Definitions ..................................................................................................................................................... 172

Checking the refrigerant charge during unit shutdown ................................................................................. 172

Microchannel coil cleaning ........................................................................................................................... 173

Cleaning procedure required for standard and environment guard microchannel coils ............................... 173

Cleaning procedure for environment guard premium microchannel coils .................................................... 173

Steps to touch-up small sections of the finned coil surface: ......................................................................... 174

Steps to touch-up end (dead) tubes and/or condenser coil headers: ........................................................... 174

Materials required: ........................................................................................................................................ 174

Chilled liquid system maintenance ............................................................................................................... 175

Maintenance requirements for YVAA chillers ............................................................................................... 177

R-134a conversion table .............................................................................................................................. 181

R-513A conversion table ............................................................................................................................. 182

R-513A conversion table ............................................................................................................................. 183

Section 10 - Decommissioning, dismantling, and disposal ............................................................................189

Table of Contents (cont'd)

Form 201.47-ICOM1

Issue date: 17/11/2022

JOHNSON CONTROLS

Table of Contents