JOHNSON CONTROLS
8
FORM 100.50-NOM12
ISSUE DATE: 04/02/2019
TABLE OF CONTENTS (CONT'D)
Low Ambient Operation ......................................................................................................................... 79
Hot Gas Reheat (HGRH) ................................................................................................................................79
HGRH System ....................................................................................................................................... 79
HGRH Setup .........................................................................................................................................82
HGRH Status .........................................................................................................................................82
HGRH Sequence of Operation ..............................................................................................................83
HGRH Faults .........................................................................................................................................84
Condenser Fan Control ..................................................................................................................................84
Low Ambient Kit ..............................................................................................................................................85
Economizer ....................................................................................................................................................85
Economizer Setup .................................................................................................................................85
Economizer Operation ...........................................................................................................................85
Heating ...........................................................................................................................................................86
Heating Setpoints ..................................................................................................................................86
Staged Natural/Propane Gas Heat ........................................................................................................86
Modulating Natural/Propane Gas Heat .................................................................................................88
Electric Heat ..........................................................................................................................................94
Hot Water/Steam Heat ..........................................................................................................................95
Heating Sequences ...............................................................................................................................96
Supply Air Tempering ............................................................................................................................98
Ventilation ....................................................................................................................................................... 99
Ventilation Types (Damper Hardware) ..................................................................................................99
Control Options .....................................................................................................................................99
Ventilation Setup ...................................................................................................................................99
2 Position Damper ................................................................................................................................. 99
Standard Damper ..................................................................................................................................99
Tek-Air Full IAQ ...................................................................................................................................100
Continuous Ventilation .........................................................................................................................102
Comfort Ventilation ..............................................................................................................................102
Exhaust/Return Fan ....................................................................................................................................102
Exhaust Fan Assembly ........................................................................................................................103
Return Fan Assembly .......................................................................................................................... 105
FlexSys .........................................................................................................................................................106
Basic FlexSys System Design .............................................................................................................106
Factory Recommended Setpoints .......................................................................................................106
FlexSys Setup .....................................................................................................................................107
Current Operating Mode ......................................................................................................................107
Fan Operation .....................................................................................................................................108
Cooling ................................................................................................................................................108
Heating ................................................................................................................................................ 110
Underoor Temperature Control .......................................................................................................... 110
Smoke Purge ................................................................................................................................................ 112
Smoke Purge Setup ............................................................................................................................ 112
Smoke Purge Sequence of Operation ................................................................................................. 112
SECTION 6 – USER INTERFACE CONTROL CENTER ...................................................................................... 113
User Interface Control Center ...................................................................................................................... 113
Data Entry Keys .................................................................................................................................. 113
Navigation Keys .................................................................................................................................. 114
Menu Select Keys ............................................................................................................................... 114