York YPAL 051, YPAL 061, YPAL 050, YPAL 060 manual GAS Heat Models

	FORM 100.50-NOM6 (1207)
TABLE OF CONTENTS
INITIAL START-UP	50
Refrigerant Charge	50
Checking Superheat and Subcooling	50
Subcooling (R-410A)	50
Superheat (R-410A)	50
Leak Checking	51
GAS HEAT MODELS	53
Pre-Start Checks:	53
Post Start Checks:	53
SECTION 4 – MAINTENANCE	55
GENERAL	55
PERIODIC MAINTENANCE – MONTHLY	55
Filters	55
Linkages	55
Compressors	55
Fan Bearing Lubrication	55
Recommended Lubricant for Fan Bearings	55
Condenser Coils	56
PERIODIC MAINTENANCE – THREE TO SIX MONTHS	56
Motor Bearing Lubrication	56
Belt Tension	56
PERIODIC MAINTENANCE – YEARLY	56
Entire Unit Inspection	56
Sheave Alignment:	56
Belts	56
Belt Replacement	57
Belt Tensioning:	57
Filter Drier Replacement	58
Forward Curved Fans	58
Fan Motor	59
Fan Shaft Bearings	59
Bearing Lock Devices	60
Eccentric Type	60
Torquing of Set-screws	61
SECTION 5 – SEQUENCE OF OPERATION	63
UNIT TYPE	63
OCCUPIED / UNOCCUPIED MODE	63
CONSTANT VOLUME MODE (CV)	63
Thermostat Input	64
Occupied Cooling	64
Unoccupied Cooling	64
Occupied Heating	65
Unoccupied Heating	65

6 JOHNSON CONTROLS