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Printed in U.S.A.
440 04 4201 01
Aug. 2011
SERVICE AND TECHNICAL
SUPPORT MANUAL
Modulating, Variable Speed Blower Motor
35” Tall, High Efficiency Condensing Gas Furnace
(F/G)9MAC
Save this manual for future reference.
Safety Labeling and Signal Words
DANGER, WARNING, CAUTION, and NOTE
The signal words
DANGER, WARNING
,
CAUTION
,
and
NOTE
are used to identify levels of
hazard seriousness. The signal word
DANGER
is
only used on product labels to signify an immediate
hazard. The signal words
WARNING
,
CAUTION
,
and
NOTE
will be used on product labels and
throughout this manual and other manual that may
apply to the product.
DANGER
−
Immediate hazards which will result in
severe personal injury or death.
WARNING
−
Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION
−
Hazards or unsafe practices which
may result in minor personal injury or product or
property damage.
NOTE
−
Used to highlight suggestions which will
result in enhanced installation, reliability, or
operation.
!
WARNING
Signal Words in Manuals
The signal word
CAUTION
is used throughout
this manual in the following manner:
!
CAUTION
Signal Words on Product Labeling
Signal words are used in combination with
colors and/or pictures or product labels.
The signal word
WARNING
is used throughout
this manual in the following manner:
Safety
−
alert symbol
When you see this symbol on the unit and in
instructions or manuals, be alert to the
potential for personal injury.
TABLE OF CONTENTS
START
−
UP, ADJUSTMENT, AND SAFETY CHECK
4
. . . . . . . . . . .
SELECT SETUP SWITCH POSITIONS
4
. . . . . . . . . . . . . . . . . . . . .
PRIME CONDENSATE TRAP WITH WATER
4
. . . . . . . . . . . . . . . . .
PURGE GAS LINES
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENTS
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUST TEMPERATURE RISE
7
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUST BLOWER OFF DELAY (HEAT MODE)
8
. . . . . . . . . . . . . .
ADJUST COOLING AIRFLOW
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUST CONTINUOUS FAN AIRFLOW
8
. . . . . . . . . . . . . . . . . . . .
ADJUST THERMOSTAT HEAT ANTICIPATOR
10
. . . . . . . . . . . . . . .
CHECK SAFETY CONTROLS
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHECKLIST
10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COOLING AND HEATING AIR DELIVERY
13
. . . . . . . . . . . . . . . . . . .
SERVICE AND MAINTENANCE PROCEDURES
15
. . . . . . . . . . . . .
ELECTRICAL CONTROLS AND WIRING
15
. . . . . . . . . . . . . . . . . . .
CLEANING AND/OR REPLACING AIR FILTER
17
. . . . . . . . . . . . . .
CLEANING BURNERS AND FLAME SENSOR
19
. . . . . . . . . . . . . . .
SERVICING HOT SURFACE IGNITER
20
. . . . . . . . . . . . . . . . . . . . . .
FLUSHING COLLECTOR BOX AND DRAINAGE SYSTEM
21
. . . .
CLEANING CONDENSATE DRAIN AND TRAP
21
. . . . . . . . . . . . . .
WINTERIZATION
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE LABEL
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING GUIDE
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SEQUENCE OF OPERATION
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTS REPLACEMENT INFORMATION GUIDE
32
. . . . . . . . . . . . .
PRODUCT NOMENCLATURE
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MODELS
(F/G)9MAC0601714A
(F/G)9MAC0801714A
(F/G)9MAC1002122A
(F/G)9MAC1202422A
Use of the AHRI Certified TM Mark indicates a
manufacturer’s participation in the program.
For verification of certification for individual
products, go to www.ahridirectory.org .