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3
XIV. Startup Procedure & Adjustment............................................................................................................................. 28
HEAT ANTICIPATOR SETTING ................................................................................................................................28
D
RAIN TRAP PRIMING ....................................................................................................................................... 28
F
URNACE OPERATION ......................................................................................................................................... 28
G
AS SUPPLY PRESSURE MEASUREMENT .............................................................................................................. 28
G
AS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT .................................................................................. 29
G
AS INPUT RATE MEASUREMENT (NATURAL GAS ONLY) ......................................................................................... 29
T
EMPERATURE RISE ......................................................................................................................................... 30
C
IRCULATOR BLOWER SPEEDS ........................................................................................................................... 30
B
LOWER HEAT OFF DELAY TIMINGS ................................................................................................................... 32
XV. Normal Sequence of Operation ................................................................................................................................ 32
POWER UP ..................................................................................................................................................... 32
H
EATING MODE ............................................................................................................................................... 32
C
OOLING MODE .............................................................................................................................................. 32
F
AN ONLY MODE ............................................................................................................................................. 33
XVI. Operational Checks .................................................................................................................................................. 33
BURNER FLAME ............................................................................................................................................... 33
XVII. Safety Circuit Description ....................................................................................................................................... 33
GENERAL ....................................................................................................................................................... 33
I
NTEGRATED CONTROL MODULE .......................................................................................................................... 33
P
RIMARY LIMIT ................................................................................................................................................ 33
A
UXILIARY LIMIT ............................................................................................................................................... 33
R
OLLOUT LIMIT ................................................................................................................................................ 33
P
RESSURE SWITCHES........................................................................................................................................ 33
F
LAME SENSOR ............................................................................................................................................... 33
XVIII. Troubleshooting...................................................................................................................................................... 33
ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS ................................................................................................. 33
D
IAGNOSTIC CHART .......................................................................................................................................... 34
R
ESETTING FROM LOCKOUT ............................................................................................................................... 34
XIX. Maintenance ............................................................................................................................................................. 34
ANNUAL INSPECTION .......................................................................................................................................... 34
F
ILTERS .......................................................................................................................................................... 34
B
URNERS ....................................................................................................................................................... 34
I
NDUCED DRAFT AND CIRCULATOR BLOWERS ......................................................................................................... 34
C
ONDENSATE TRAP AND DRAIN SYSTEM (QUALIFIED SERVICER ONLY)...................................................................... 35
F
LAME SENSOR (QUALIFIED SERVICER ONLY) ...................................................................................................... 35
F
LUE PASSAGES (QUALIFIED SERVICER ONLY) ..................................................................................................... 35
XX. Internal Filter Removal ............................................................................................................................................. 35
XXI. Before Leaving an Installation ................................................................................................................................ 35
XXII. Repair & Replacement Parts .................................................................................................................................. 35
Table of Contents
APPENDIX
Troubleshooting Chart ...................................................................................................................................................... 37
Wiring Diagram ................................................................................................................................................................ 39