JOHNSON CONTROLS
7
FORM 100.50-NOM12
ISSUE DATE: 04/02/2019
TABLE OF CONTENTS (CONT'D)
Periodic Maintenance – Three To Six Months ................................................................................................ 52
Motor Bearing Lubrication .....................................................................................................................52
Belt Tension ........................................................................................................................................... 52
Periodic Maintenance – Yearly .......................................................................................................................52
Entire Unit Inspection ............................................................................................................................52
Sheave Alignment .................................................................................................................................52
Belts ......................................................................................................................................................53
Belt Replacement ..................................................................................................................................53
Filter Drier Replacement .......................................................................................................................53
Forward Curved Fans ............................................................................................................................54
Fan Motor ..............................................................................................................................................54
Fan Shaft Bearings ................................................................................................................................55
Mounting Details ....................................................................................................................................55
Bearing Lock Devices ............................................................................................................................55
Eccentric Type ....................................................................................................................................... 56
Torquing of Set-screws ......................................................................................................................... 57
SECTION 5 – SEQUENCE OF OPERATION .........................................................................................................59
Unit Type ........................................................................................................................................................59
Variable Air Volume (VAV) .....................................................................................................................59
Single Zone VAV (SZVAV) ..................................................................................................................... 59
FlexSys
™ ..........................................................................................................................................................................................................................................................60
Unit Overall Status .........................................................................................................................................60
Phase Monitor .......................................................................................................................................60
Occupancy/Unoccupancy Determination .......................................................................................................61
Night Set-Back ...............................................................................................................................................61
Night Set-Back Setup ............................................................................................................................61
Night Set-Back Sequence Of Operation ................................................................................................61
Current OperatinG Mode ................................................................................................................................ 61
Single Zone VAV (SZVAV) .............................................................................................................................. 62
SZVAV Setup .........................................................................................................................................62
Supply Fan ............................................................................................................................................63
Cooling And Heating Operation .............................................................................................................64
Variable Air Volume (VAV) ..............................................................................................................................66
VAV Setup .............................................................................................................................................66
Supply Fan ............................................................................................................................................67
Cooling And Heating Operation .............................................................................................................69
Active Supply Air Temperature (SAT) Setpoint ...................................................................................... 69
Compressors: Control and Operation .............................................................................................................73
Compressor Systems ............................................................................................................................73
Compressor Control ..............................................................................................................................73
Compressor Staging ..............................................................................................................................73
Fast Compressor Start ..........................................................................................................................74
Compressor Operation ..........................................................................................................................74
Compressor Status ................................................................................................................................75
Compressor Safety Circuits ...................................................................................................................75
Resetting a Compressor System Safety Lockout ..................................................................................78
Suction Temperature Monitoring ...........................................................................................................78
High Discharge Pressure Unloading .....................................................................................................79
Low Ambient Inhibit ...............................................................................................................................79
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