York YPAL 060, YPAL 061, YPAL 050, YPAL 051 manual Sequence of Operation

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
Configuration (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

JOHNSON CONTROLS 7