Cancels: New OM11-18
10/15/00
NOTE TO INSTALLER
This manual should be left with the equipment owner.
Your rooftop combination heating/cooling unit is equipped
with an automatic direct spark ignition and induced draft
combustion blower.
TO LIGHT UNIT
See Fig. 1A and 1B for location of gas valve. Refer to Fig. 2
while proceeding with the following steps.
I. Step 1
Set room thermostat to the lowest temperature setting and
set SYSTEM switch to HEAT or AUTO. position.
II. Step 2
Close the manual gas valve.
III. Step 3
Turn off the electrical supply to the unit and install lockout
tag.
IV. Step 4
Remove the burner access panel.
V. Step 5
Move the control on the gas valve to the OFF position and
wait 5 minutes.
VI. Step 6
Move control on gas valve to ON position.
VII. Step 7
Replace the burner access panel.
VIII. Step 8
Turn on the electrical supply to unit.
IX. Step 9
Open the manual gas valve.
X. Step 10
Set room thermostat selector slightly above room tempera-
ture to start unit. The induced-draft combustion air fan will
start. Main gas valve will open and main burners should
ignite within 5 seconds. If the burners do not light, there is a
22-second delay before another 5-second try. If the burner
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors
and liquid in the vicinity of this or any other appliance.
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury
or property damage. Refer to this manual. For assis-
tance or additional information consult a qualified
installer, 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.
WARNING: Before performing recommended
maintenance, be sure main power switch to unit is
turned off and lockout tag is installed. Electrical shock
could cause personal injury.
WARNING: Do not attempt to ignite gas by hand;
personal injury may result.
DANGER:
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,
familiarize yourself with all the procedures that
must be followed.
3. Never attempt to manually light the main burners
on unit with a match, lighter, or any other flame. If
the electric sparking device fails to light the main
burners, refer to the following shutdown proce-
dures, then call your dealer as soon as possible.
If you do not follow these instructions exactly, a fire or
explosion may result. Property damage, injury, or loss
of life could occur.
user’s information manual
SINGLE PACKAGE ROOFTOP
GAS HEATING/ELECTRIC COOLING
UNITS
580F
Sizes 036-150
3 to 12
1
/
2
Tons
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