291891-YUM-A-0207
2
Unitary Products Group
SAFETY INFORMATION -
FOR YOUR SAFETY
•
Make sure that the furnace
area is clear and free of com-
bustible materials, gasoline
and other flammable vapors
and liquids.
•
Be sure the furnace is free and
clear of insulating material.
Examine the installation of the
furnace for addition of insula-
tion. Some insulations are
combustible.
•
For proper operation of this fur-
nace, air for combustion and
ventilation is required. Make
sure that these openings are
not obstructed.
•
For lighting or shutting down
this furnace, refer to the light-
ing instructions provided adja-
cent to the burners and also
located in this manual.
•
A blocked vent roll-out switch
is provided in the burner com-
partment. This switch is a man-
ual reset. If the furnace fails to
operate, contact a qualified
service agency.
•
Should the gas supply fail to
shut off or if overheating occurs,
shut off the gas valve to the fur-
nace before shutting off the
electrical supply. Then call a
qualified service technician.
•
Do not use this furnace if any
part has been under water. A
flood-damaged furnace is
extremely dangerous. Attempts
to use the furnace can result in
fire or explosion. A qualified
service agency should be con-
tacted to inspect the furnace
and to replace all gas controls,
control system parts, electrical
parts that have been wet or the
furnace if deemed necessary.
•
Determine the integrity of the
installation regarding the flue
gas vent, the return and supply
air duct, the equipment is well
supported and there are no
signs of deterioration. The man-
ufacturer recommends that
main burner, ignition de-vice
and controls are inspected by a
qualified furnace technician
before each heating season.
This gas/electric, heating/cooling
unit is designed for outdoor use
and can be installed anywhere
from grade level to the roof. Elec-
tric air conditioning in the summer
and gas heating in the winter - all
from a single unit.
SYSTEM OPERATION
THERMOSTATS
Set your thermostat for either heat-
ing or cooling then set it for the
desired temperature. DO NOT
MOVE THE THERMOSTAT RAP-
IDLY ON AND OFF, OR BACK
AND FORTH FROM HEAT TO
COOL. THIS COULD DAMAGE
YOUR EQUIPMENT.
Always allow at least 5 minutes
between changes. Find the tem-
perature that is most comfortable to
you, and then LEAVE YOUR
THERMOSTAT ALONE. (Excep-
tion is for night or vacation “set
back” to conserve energy)
Manually moving the thermostat up
or down will not speed up tempera-
ture changes in your rooms. This
only causes the thermostat switch
to function at your command rather
than responding to room tempera-
ture.
Heat generated by devices other
than the furnace may interfere with
thermostat performance. There-
fore, lamps, radios, television sets,
etc. should not be placed near the
thermostat.
SPARK TO PILOT IGNITION
DEVICE
This unit is equipped with a spark
to pilot ignition device. The control
is designed to automatically light
the burner each time the thermo-
stat “calls” for heat.
HEATING
When the thermostat calls for
HEAT, the thermostat terminal “W”,
“W1” or “W2” is energized, the con-
trol board checks for a open pres-
sure switch “PS” and closed limit
switches, then energizes the com-
bustion air blower.
Do not attempt to manu-
ally light the burners. Per-
sonal injury could result.
C
ongratulations . . .
On your purchase of one of our Single Package Air Conditioning Units. This energy efficient system has been precision
designed, manufactured of high quality materials and has passed many vigorous inspections and tests to ensure years of satis-
factory service.
Please read this manual thoroughly. It will help you understand your system, tell you how to operate it efficiently and how to
obtain the greatest measure of comfort at the lowest operating expense.
We appreciate your interest in our products and your decision to purchase our Single Package Unit. Enjoy your comfort.
