User's Manual

All installations and services must be performed by qualified service personnel.

INDEX

SECTION BEGINNING PAGE

I. SAFETY INFORMATION i

II. FURNACE SPECIFICATIONS 1

III. GENERAL INSTALLATION 6

A. CODES AND CLEARANCES 6

B. FURNACE LOCATION 7

B1.CDX3 HORIZONTAL APPLICATION 7

C. REPLACING EXISTING FURNACE FROM A COMMON VENT 9

D. GENERAL REQUIREMENTS FOR VENTING CHX3/CDX3 9

E. SIDEWALL VENTING

E1. SINGLE PIPE (SIDEWALL) VENTING OPTION 15

F. INSTALLATION OF OUTSIDE VENT/AIR INTAKE TERMS. 15

G. CONNECTING FURNACE TO ROOF VENT/AIR TERMS. 17

H. CONNECTING FURNACE TO VENT/AIR INTAKE TERMS. 18

I. CONDENSATE DRAIN LINE & TRAP ASSY. 23

J. GENERAL GAS PIPING 26

J1. REQUIREMENTS AND SIZING OF DUCTWORK 27

K. FILTERS 30

L. WIRING 32

IV. STARTING THE UNIT 36

A. SEQUENCE OF OPERATIONS 36

B. INITIAL START-UP 39

C. MEASURING AND ADJUSTING HEAT INPUT RATE 70

D. FURNACE CHECKOUT PROCEDURE 47

V. INSTALLER’S INSTRUCTIONS TO USER 47

VI. TROUBLESHOOTING 48

APPENDIX – A REPLACEMENT PARTS LIST 55

APPENDIX – B WIRING DIAGRAMS 59

WARRANTY 61