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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111 Catalog No. 534-80017 Printed in U.S.A. Form 48HJ-2SO Pg 1 11-00 Replaces: 48GJ,HJ-1SO
Book 1 4
Ta b 1 a 6 a
User’s Information Manual
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 com-
bustion blower.
TO LIGHT UNIT
See Fig. 1A and 1B for location of gas valve. 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 or AUTO. position.
Step 2 —
Close the manual gas valve.
Step 3 —
Turn off the electrical supply to the unit, tag
disconnect.
Step 4 —
Remove the compressor access panel.
Step 5 —
Move the gas valve switch to the OFF position
and wait 5 minutes.
Step 6 —
Move the gas valve switch to the ON position.
Step 7 —
Replace the compressor access panel.
Step 8 —
Turn on the electrical supply to unit.
Step 9 —
Open the manual gas valve.
Step 10 —
Set room thermostat selector slightly above
room temperature 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
still does not light, the time delay is repeated. If the burner does
not light within 15 minutes, there is a lockout. To reset the con-
trol, break the 24-v power to W1. Repeat Steps 1-10. If burners
still do not light, call for service.
Step 11 —
Set the temperature selector on room thermostat
to desired setting.
WARNING: If the information in this manual is
not followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.
— Do not store or use gasoline or other flam-
mable vapors and liquids in the vicinity of
this or any other appliance.
— 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.
— Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause property damage,
serious injury or death. Refer to this manual. For
assistance or additional information consult a
qualified installer, service agency, or the gas
supplier.
Before performing recommended maintenance, be sure
main power switch to unit is turned off. Electrical shock
could cause serious injury or death.
Do not attempt to light by hand; serious injury or death
may result.
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.
If you do not follow these instructions exactly, a fire or
explosion may result. Property damage, injury, or loss of
life could occur.
If the main burners fail to light, or the blower fails to come
on, shut down gas heating section and call your dealer for
service. Failure to follow these requirements could result in
serious injury or death.
48HJ004-014
Single-Package Rooftop
Heating/Cooling Units