International comfort products R9MSB, Service And Technical Support Manual

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Printed in U.S.A.
440 04 6601 03
10/15/2018
SERVICE AND TECHNICAL SUPPORT
MANUAL
Single Stage, PSC Blower Motor
35” Tall, High Efficiency Condensing Gas Furnace
R9MSB
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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 3 . . . .
GENERAL 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRIME CONDENSATE TRAP WITH WATER 3 . . . . . . . . . .
PURGE GAS LINES 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENTS 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHECK INLET GAS PRESSURE 4 . . . . . . . . . . . . . . . . . . . .
ADJUST MANIFOLD PRESSURE 5 . . . . . . . . . . . . . . . . . . .
ADJUST TEMPERATURE RISE 6 . . . . . . . . . . . . . . . . . . . . .
ADJUST BLOWER OFF DELAY (HEAT MODE) 7 . . . . . . .
BLOWER OFF DELAY JUMPER POSITIONS 7 . . . . . . . . .
ADJUST COOLING AIRFLOW 7 . . . . . . . . . . . . . . . . . . . . . .
ADJUST THERMOSTAT HEAT ANTICIPATOR 7 . . . . . . . .
CHECK SAFETY CONTROLS 7 . . . . . . . . . . . . . . . . . . . . . .
CHECKLIST 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ALTITUDE DERATE MULTIPLIER FOR U.S.A. 8 . . . . . . . .
GAS RATE (CU FT./HR) 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ORIFICE SIZE AND MANIFOLD PRESSURE 11 . . . . . . . . .
ORIFICE SIZE AND MANIFOLD PRESSURE 12 . . . . . . . . .
SERVICE AND MAINTENANCE PROCEDURES 13 . . . . . .
PRESSURE SWITCHES 13 . . . . . . . . . . . . . . . . . . . . . . . . . . .
CLEANING HEAT EXCHANGERS 19 . . . . . . . . . . . . . . . . . . .
SEQUENCE OF OPERATION 23 . . . . . . . . . . . . . . . . . . . . . .
PARTS REPLACEMENT INFORMATION GUIDE 27 . . . . . .
MODELS
R9MSB0601716
R9MSB0801716
R9MSB1002120
R9MSB1202420
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 .