Carrier 58UVB - Manual (Page 13)

13
UNIT AND PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in damage to
unit components.
This furnace is designed for continuous return--air
minimum temperature of 60_F db or intermittent operation
down to 55_F db, such as when used with a night setback
thermostat. Return--air temperature must not exceed 85_F
db.
CAUTION
!
If you choose to leave your furnace on during extended absences
do not set your thermostat lower than the limits shown in the
Caution box above.
To protect your property from damage from potential problems
due to unintended interruptions in utility services or other events,
it is recommended that you either winterize your plumbing
system or have someone check on your house regularly while
you are away.
Your dealer or a licensed plumber can give you additional advice
about winterizing your plumbing system.
A CHECK--UP CHECKLIST
Your furnace represents an important investment in your family’s
comfort and your home’s value. To keep it performing properly
and to prevent future problems, have a trained service specialist
give your furnace a professional check--up annually. The
following checklist can be used as a guideline to proper service:
S Inspect all flue gas passages, burners, heat exchangers,
coupling box(es), and inducer assembly.
S Inspect all combustion--air and vent piping inside
structure and vent pipe termination outside the
structure.
S Check gas pipes leading to and inside your furnace for
leaks.
S Inspect and clean the blower motor and wheel.
NOTE: The inducer and blower motors are pre--lubricated and
require no additional lubrication. These motors can be identified
by the absence of oil ports on each end of the motor.
S Inspect and change or clean air filters(s), if necessary.
S Inspect all supply-- and return--air ducts for
obstructions, air leaks, and insulation. Remedy any
problem when necessary.
S Inspect the return--air duct connections(s) at the furnace
to ensure it is physically sound, sealed to the furnace
casing, and terminates outside the space containing the
furnace.
S Inspect electrical wiring, connections, and components
for loose connections.
S Perform an operational checkout to determine whether
your furnace is working properly and if it requires
adjustments.
S Inspect all condensate drain tubes and condensate trap
assembly for leaks. The condensate removal system
should be cleaned annually by a qualified service
agency. Refer to the Service and Maintenance
Instructions for further information.
S Examine the physical support of the furnace. Support
should be sound with no cracks, sagging, gaps, etc.
around the base.
S Check furnace for any obvious signs of deterioration.
BEFORE YOU REQUEST A SERVICE
CALL
If your furnace is not operating or not performing properly, you
may save the expense of a service call by checking a few things
yourself before calling for service.
For Insufficient Airflow:
S Check for dirty air filter(s).
S Check for blocked return--air or supply--air grilles
throughout your home. Ensure they are open and
unobstructed.
If problem still exists, call your dealer for service.
If Furnace Fails to Operate:
Follow this checklist step by step, advancing to the next step only
if furnace fails to start.
S Check thermostat for proper temperature. Is thermostat
set above room temperature?
S Is thermostat set on HEAT?
S Check fuses and circuit breakers. Is electrical supply
on?
S Is manual shutoff valve in gas supply pipe in open
position? (Follow start--up procedures if you open gas
valve.)
NOTE: Turn off electrical supply before continuing with
checklist.
S Is control switch on gas valve in ON position? (Follow
startup procedures if you must reset switch to ON
position.)
S Check manual reset flame rollout switch located on the
burner box. If furnace has experienced high
temperature conditions, this switch will shut off the
furnace. Reset it by pushing the button on the switch. If
it trips again, shut down the furnace and call for
service. See “Shutting Down Your Furnace” section in
this manual.
S Check for obstructions around the vent termination
outside the structure.
If the furnace still fails to operate, call your service representative.
For your convenience, record the furnace product and serial
numbers on back page. Should you ever require service, you will
have ready access to the information needed by your service
representative.
This furnace has a light--emitting--diode (LED) status code
display to aid the installer, service technician, or homeowner
while installing or servicing the unit. The LED code can be seen
by removing the main furnace door and viewing the LED
through the view port in the blower access panel. (See Fig. 2.)