Carrier 48 Series User's Information Manual

User's Information Manual
NOTE TO INSTALLER
This manual should be left with the equipment owner.
FOR YOUR SAFETY
Do not store or use gasoline or other flam-
mable vapors and liquids in the vicinity of this
or any other appliance.
Improper installation, adjustment, alteration, serv-
ice or maintenance can cause injury or prop-
erty damage. Refer to this manual. For assistance
or additional information consult a qualified in-
staller, service agency, or the gas supplier.
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
any phone in your building.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the fire department.
Before performing recommended maintenance, be sure
main power switch to unit is turned off. Electrical shock
could cause personal injury.
Your combination heating/cooling unit is equipped with
an automatic intermittent pilot and induced draft power com-
bustion blower.
Pilot will light automatically. Do not attempt to light by
hand; personal injury may result.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 1 PC 111 Catalog No. 564-920
Tab 1a 1c
Gas Heating/Electric Cooling Units
Printed in U.S.A.
TO LIGHT UNIT
1. Do not turn off the electrical power to unit without
first turning off the gas supply.
2. Before attempting to start the gas heating section, fa-
miliarize yourself with all the procedures that must
be followed.
3. Never attempt to manually light the pilot on unit with
a match, lighter, or any other flame. If the electric
sparking device fails to light the pilot, refer to the
shutdown procedures, then call your dealer as soon
as possible.
If you do not follow these instructions exactly, a fire
or explosion may result, causing property damage, in-
jury, or loss of life.
See Fig. 1 for location of gas valves. Refer to Fig. 2 while
proceeding with the following steps.
Step 1 —
Set room thermostat to the lowest temperature
setting and set SYSTEM switch to HEAT.
Step 2 —
Close the external manual gas valve.
Step 3 —
Turn off the electrical supply to the unit.
Step 4 —
Remove the burner compartment access panel.
Step 5 —
Turn the control dial on the internal gas valve
clockwise to the OFF position and wait 5 minutes.
Step 6 —
Turn control dial on internal gas valve clock-
wise to ON position.
Step 7 —
Replace the burner compartment access panel.
Step 8 —
Turn on the electrical supply to unit.
Step 9 —
Open the external gas valve.
Step 10 —
Set room thermostat selector slightly above
room temperature to start unit. The induced-draft combus-
tion air fan will start. Pilot lights within 30 seconds. Main
gas valves will open and main burners should ignite within
2 minutes from the pilot light ignition. Indoor blowers will
start within a few minutes of main ignition. On 48MA units,
if burners do not light within 2 minutes, the ignition control
will lock out. Begin again at Step 1. If burners still do not
light, contact your dealer for service.
Step 11 —
Set the temperature selector on room thermo-
stat to desired setting.
Form 48-13SO Pg 1
48 Series
3-98 Replaces: 48-12SO