York ECO2 YPAL 050 - Manual (Page 7)

7 JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
TABLE OF CONTENTS
Space Sensor – Hard Wired or Communicated .................................................................65
Cooling Operation – Occupied or Unoccupied .............................................................65
Heating Operation – Occupied or Unoccupied .............................................................66
Stand Alone ...........................................................................................................................66
Cooling Operation – Occupied or Unoccupied .............................................................67
Heating Operation – Occupied or Unoccupied .............................................................67
VARIABLE AIR VOLUME (VAV) .................................................................................................................68
Cooling - Occupied with Thermostat ..................................................................................68
Cooling – Unoccupied with Thermostat .............................................................................69
Occupied or Unoccupied Heating with a Thermostat .......................................................69
Occupied Cooling with Hard Wired or Communicated Space Sensor ............................69
Cooling – Unoccupied with a Hard Wired or Communicated Space Sensor .................70
Heating – Occupied with a Hard Wired or Communicated Space Sensor ......................70
Heating – Unoccupied with a Hard Wired or Communicated Space Sensor ..................70
Occupied Cooling – Stand Alone ........................................................................................71
Cooling – Unoccupied Stand Alone ...................................................................................72
Heating – Occupied Stand Alone ........................................................................................72
Heating – Unoccupied Stand Alone ....................................................................................72
CONDENSER FAN OPERATION ...............................................................................................................72
COOLING COMPRESSOR LOCKOUT .....................................................................................................72
Sequence of Operation .......................................................................................................72
LOW AMBIENT OPERATION ....................................................................................................................73
Operation and Pressure Control Range .............................................................................73
Confi guration (Jumpers and Potentiometers) ...................................................................73
SUPPLY FAN OPERATION .........................................................................................................................74
Constant Volume (CV) ..........................................................................................................74
Variable Air Volume (VAV) ....................................................................................................75
VAV Supply Fan Speed Control ...........................................................................................76
ECONOMIZER .............................................................................................................................................76
Dry Bulb .................................................................................................................................76
Single Enthalpy .....................................................................................................................77
Dual Enthalpy ........................................................................................................................77
BAS ECONOMIZER OPERATION .............................................................................................................77
Sequence of Operation .......................................................................................................78
Constant Volume Economizer Set Point ............................................................................78
Variable Air Volume Economizer Set Point ........................................................................78
Economizer / Compressor Operation .................................................................................79
Economizer PI Loop (Proportional and Integral) ...............................................................79
ECONOMIZER LOADING ...........................................................................................................................79
Constant Volume ..................................................................................................................80
Variable Air Volume ..............................................................................................................80