York International P2HMX12F08001, Installation Manual

1 

OIL-FIRED WARM AIR 

FURNACE 

P2HMX12F08001   P3HMX14F10001 

P3HMX20F12001 

(Upflow or Horizontal Models) 

P3LBX12F08001   P3LBX14F12001 

(Lowboy Models)

INTRODUCTION ...............................................................2

HEAT LOSS ......................................................................2

LOCATION OF UNIT ........................................................2

AIR CONDITIONING .........................................................4

COMBUSTION AIR ...........................................................4

CHIMNEY VENTING .........................................................4

OIL TANK..........................................................................6

PIPING INSTALLATION ...................................................6

ELECTRICAL CONNECTIONS ........................................6

CIRCULATING AIR BLOWER..........................................7

OIL BURNER ....................................................................8

FURNACE INSTALLATION SET-UP................................9

MAINTENANCE AND SERVICE.....................................10

OPERATING INSTRUCTIONS .......................................10

TABLE A-1: BECKETT OIL BURNER SET-UP .............11

TABLE A-2: DIRECT DRIVE BLOWER SET-UP ...........11

TABLE A-3: DIRECT DRIVE BLOWER 
CHARACTERISTICS ......................................................12

GENERAL DIMENSIONS – P*HMX MODELS ...............14

GENERAL DIMENSIONS – P3LBX MODELS................15

APPENDIX B: WIRING DIAGRAM .................................16

WIRING NOTES..............................................................17

R7184 DETAILED SEQUENCE OF OPERATION..........18

TABLE C-1: ST9103 DETAILED SEQUENCE OF 
OPERATION ...................................................................20

TABLE C-2:  CAD CELL RESISTANCE ........................21

TABLE C-3:  R7184 TROUBLESHOOTING...................21

TABLE C-4:  SYSTEM AND GENERAL 
TROUBLESHOOTING ....................................................24

AIR FILTER LOCATIONS...............................................27

REPAIR PART LIST – P3HMX14F10001 & 
P3HMX20F12001 ............................................................28

REPAIR PART LIST – P3LBX12F08001A & 
P3LBX14F12001A ..........................................................29

REPAIR PART LIST – P2HMX12F08001 .......................30

REPLACEMENT PART CONTACT INFORMATION ......31

INSTALLATION

MANUAL 

CONTENTS 

Read this manual completely before beginning
installation. 
Important: These instructions must be kept with
the furnace for future reference.