International comfort products R9MSB, Service And Technical Support Manual

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440 04 6601 03 15 Specifications subject to change without notice.
Caution must be taken when manually closing this switch for
service purposes.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury, or death.
Blower door switch opens 115
− v power to furnace
control. No component operation can occur unless
switch is closed. Exercise caution to avoid electrical
shock from exposed electrical components when
manually closing this switch for service purposes.
!
WARNING
4. For approximately 2 sec, short (jumper) the COM-24v
terminal on control to the TEST/TWIN 3/16—in. (5
mm) quick-connect terminal on control until the LED
goes off. Remove jumper from terminals. (See
Figure 2.)
NOTE : If TEST/TWIN and COM-24v terminals are
jumpered longer than 2 sec, LED will flash rapidly and
ignore component test request.
Component test sequence is as follows:
a. LED will display previous status code 4 times.
b. Inducer motor starts and continues to run until Step
f of component test sequence.
c. After 7 sec the hot surface igniter is energized for
15 sec., then off.
d. Blower motor operates on HEAT speed for 10 sec.
e. Blower motor operates on COOL speed for 10 sec.
f. Inducer motor stops.
5. Reconnect R lead to furnace control, remove tape
from blower door switch, and re-install blower door.
6. Verify furnace shut down by lowering thermostat
setting below room temperature.
7. Verify that furnace restarts by raising thermostat
setting above room temperature.
Checklist
1. Put away tools and instruments. Clean up debris.
2. Verify that the jumper is removed from the TEST/
TWIN terminal. Verify that there is nothing plugged
into the PLT connector. (Note: If there is a jumper
connector plugged into PLT, remove it and discard.)
(See Figure 2.)
3. Verify that the Blower/Heat Off Delay jumpers are set
as desired. (See Figure 2.)
4. Verify that the blower and control (“Main”) doors are
properly installed.
5. Verify that there are no unsealed openings in the
blower shelf or casing.
6. Verify that the Status LED glows. If not, check that the
power supply is energized and that the blower door is
secure. (See Figure 5.)
7. Cycle test furnace with room thermostat to be sure
that it operates properly with the room thermostat.
Check all modes including Heat, Cool and Fan.
8. Check operation of accessories per manufacturer’s
instructions.
9. Review Owner’s Manual with owner.
10. Attach entire literature packet to furnace.
Care and Maintenance
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never store flammable or combustible materials on,
near, or in contact with the furnace, such as:
1. Spray or aerosol cans, rags, brooms, dust
mops, vacuum cleaners, or other cleaning
tools.
2. Soap powders, bleaches, waxes or other
cleaning compounds, plastic or plastic
containers, gasoline, kerosene, cigarette lighter
fluid, dry cleaning fluids, or other volatile fluids.
3. Paint thinners and other painting compounds,
paper bags, or other paper products. Exposure
to these materials could lead to corrosion of the
heat exchangers.
!
WARNING
For continuing high performance and to minimize possible
furnace failure, periodic maintenance must be performed on
this furnace. Consult your local dealer about proper
frequency of maintenance and the availability of a
maintenance contract.
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Turn off the gas and electrical supplies to the furnace
and install lockout tag before performing any
maintenance or service. Follow the operating
instructions on the label attached to the furnace.
!
WARNING
CARBON MONOXIDE POISONING AND FIRE
HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never operate furnace without a filter or filtration
device installed. Never operate a furnace with filter or
filtration device access doors removed.
!
WARNING
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs.
Use care and wear appropriate protective clothing,
safety glasses and gloves when handling parts, and
servicing furnaces.
CAUTION
!
The minimum maintenance on this furnace is as follows:
1. Check and clean air filter each month or more
frequently if required. Replace if torn.
2. Check blower motor and wheel for cleanliness each
heating and cooling season. Clean as necessary.