Carrier 58B User Manual
Carrier
Upflow and Downflow Gas-Fired Furnaces
HANG ON WALL NEAR FURNACE
This 58B unit has been approved by the
American Gas Association Laboratories and carries
all required safeguards against fires and accidents.
Such occurrences will take place only if the unit is
mistreated or not properly maintained.
The operation and care of your unit is simple
and easy. By following these operating and main
tenance procedures, you can expect to receive
better, longer, and more reliable service from your
new Carrier appliance.
Here Are a Few "Do's" and "Don'ts"
• Do become familiar with wallcard instructions.
• Do use filters Check them periodically and
make sure that they are clean.
• Don't set your thermostat too low. Ideal
comfort zone is usually between 72 F and 78 F
• Don't be a “thermostat jiggler.” Frequent
changing of your thermostat can increase your
operating costs.
• Don't turn your furnace off just because you’ll
be away for a day or more. It takes quite a
while to restore comfort — but it costs rela
tively little to maintain it.
• Don't block registers with furniture. Don’t put
a lamp, TV or radio too near your thermostat.
This will cause it to give a “false” reading.
Here's How Your Heating System Works
The furnace operates automatically. It is con
trolled by a thermostat which you set at the
temperature most comfortable to you. When the
inside temperature drops below this setting your
thermostat senses this and turns on the system.
First the gas valve opens, and the burners are
lighted by your pilot. After a few moments, the
blower turns on automatically. The air it moves
over the element is warmed and goes on thru the
ducts to room registers.
When the temperature in the room reaches the
thermostat setting, the gas valve closes and the
burners are turned off. The blower continues a few
moments until the heat in the element is used up.
Then it turns off, too.
All forced air furnaces are equipped with high
temperature limit switches (one on most upflow
models, two on other types) that prevent the
furnace from overheating by turning off the
burners if the blower fails to come on. Except on
downflow furnaces, these switches should recycle
automatically, causing the burner to go on and off.
On downflow models, the second of the two
switches used requires manual reset. (Reset button
is on furnace top.)
Here's How You Get Greater Satisfaction
The following steps are very easy to perform.
So before you get ready to light your furnace pilot
make sure that you have gone thru the list.
1. Open all warm air registers and make sure that
all return air grilles are unobstructed.
2. Set room thermostat below room temperature.
3. If a humidifier is installed with your system,
open the water supply valve.
4. If a line voltage switch is provided in the
furnace circuit, make sure that it is turned to
the “Off” position.
5. Make sure that the main burner and pilot
manual gas shutoff valves are closed. “On”and
“Off ” positions are clearly marked.
6. Wait five minutes for unit to be purged of gas,
and then get ready to start the burner.
STARTING YOUR BURNER - Lighting in
structions are also shown on rating plate located on
or near burner compartment door. Should any
doubt exist in your mind concerning proper
lighting procedures, call your gas serviceman to
light unit.
1. After five minute wait for unit to be purged of
gas, turn unit electric switch to “Off.”
2. Open the pilot manual gas shutoff valve.
3. Light the pilot with a match or taper.
NOTE. If your unit is equipped for 100
percent shutoff, it will be necessary to reset
the safety valve before you can relight the
pilot
5. Open the main burner manual gas shutoff valve.
6. Turn the unit electric switch to “On.”
7. Set your thermostat to the desired room
temperature. On heating/cooling systems, set
the system switch to “Heat,” and the fan
switch to “Auto.” or “Cont.” That’s all there is
to it.
OPERATING FAN CONTINUOUSLY (FAN
SWITCH SET ON “CONT”) - Your distribution
system will perform at its best if the furnace fan is
run continuously when weather outdoors is 40 F
or less. This will eliminate cold floors and hot
ceilings and provide for a more constant
temperature.
1. On heating only models, turn the summer
switch (located on the furnace) to the “On”
position.
2. On heating/cooling models, turn the thermostat
fan switch to “Cont.”
3. If your needs are not met by Step 1 or 2, see
your dealer for specific instructions.
©Carrier Corporation 1969
Form 58B-1SO
STOPPING YOUR UNIT - Follow these simple
procedures to put your unit into “retirement” for
the summer.
1. Close the main burner manual gas shutoff valve.
2. Close the pilot manual gas shutoff valve.
3. Turn the unit electric switch to “Off.”
4. Close humidifier water supply valve (if unit is
equipped with a humidifier).
MAINTAINING YOUR UNIT - The life of your
system depends on the care you give it. Proper care
assures good performance; lack of it can damage
the unit (and invalidate your warranty).
Here are the things you should do, or have your
dealer serviceman do for you.
NOTE: Before you start, turn off all electrical
power to unit and turn thermostat to “Off. ”
Keeping Filters Clean — As a homeowner, this is
your most important responsibility. A dirty filter
reduces efficiency of your system, causing erratic
performance of controls and resulting in damage to
the motor or heating element.
1. Inspect filters at regular intervals depending
upon dirt conditions. On new homes, check the
filter every week for four consecutive weeks to
begin with. In all cases, inspect your filters at
least every two or three weeks when the system
is in constant operation. Replace filters at the
beginning of each season — and thereafter as
needed.
2. If you have disposable-type filters and they are
moderately dirty, clean with vacuum or tap
lightly over newspaper. Replace filter with
arrows pointing in the direction of air flow.
(Turn dirtiest side toward return air stream to
prevent dirt from being blown into supply air
when the blower is started.) Replace disposable
filters with same type after one cleaning.
3. If you have permanent-type filters and they
become extremely dirty, they can be cleaned
with hose and water. Be sure to spray expand
able aluminum-type filters with a filter coat
after each washing. Your dealer has this avail
able in handy spray cans. If your filter is a
Duralast type, this coating is not necessary.
(Ensure that filters are thoroughly dry before
replacing them.) Some permanent-type filters
may be vacuum cleaned or shaken out. It’s not
necessary to wash them. Check the manu
facturer’s recommendations.
NOTE: Do not operate unit with blower door
remo ved.
Lubricating Motors — Direct drive motor and
blower assemblies are factory lubricated and sel
dom requite oiling. Frequency and amount of
oiling depends upon usage and climatic conditions.
Consult your dealer serviceman for specific in
structions. Belt drive motor and blower assemblies
should be oiled at the beginning of each season
with a good grade of non-detergent SAE No. 20
motor oil. Oil cups are at each end of the motor.
NOTE: Do not overoil motor. Three drops in
each oil cup is enough. (More will attract dirt.)
Keeping Heater Element Clean — In your general
furnace housekeeping, don’t forget the heater
element. It’s a good idea to have your dealer
serviceman check the heat exchanger at the start of
each heating season, and if necessary perform the
following procedures.
1. Make sure that all utilities are turned off.
2. Remove burners, manifold assembly, vent con
nectors, and draft diverter.
3. Remove flue baffles from upper flue outlet.
4. Clean flue ways with brush or vacuum cleaner.
5. Replace baffles, ensuring rear of baffle engages
dimple in heating element. Secure screws care
fully so that heating element will be leak tight.
6. Replace remaining parts; turn on utilities.
7. Test for leaks.
Here's A Handy Checklist
If your furnace fails to operate properly, first
check the following. It may save you the cost of a
service call.
1. Is your room thermostat set correctly? On
heating/cooling systems, the thermostat system
switch should be turned to “Heat;” the fan
switch to “Auto.” or “Cont” (continuous fan
operation).
2. Are the power and gas both on?
3. Are the filters clean?
If the answer to these questions is “Yes,” and
the furnace still doesn’t operate properly, call your
Authorized Carrier Dealer for service.
DEALER'S NAME.
ADDRESS_______
SERVICE: Day_
MODEL NO.
DATE INSTALLED.
__
.Night.
.SERIAL NO.
For replacement items, use Carrier specified parts.
Manufacturer reserves the right to change any product specifications without notice.
CARRIER AIR CONDITIONING COMPANY • SYRACUSE. NEW YORK
Tab 10 Form 58B-1SO Supersedes 58BA501815 Printed in U S A 6-69 Codes E and MS Catalog No. 535-800
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