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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480045-01 Printed in U.S.A. Form 48Z-5SO Pg 1 7-07 Replaces: 48Z-3SO
Book 1
Ta b 1 a
User’s Information Manual
NOTE TO INSTALLER:
This manual should be left with the equipment owner.
Your combination heating/cooling rooftop unit is equipped
with an automatic direct spark ignition system and induced-
draft power combustion blower.
TO LIGHT UNIT
See Fig. 1 for location of gas valve(s). Refer to Fig. 2 while
proceeding with the following steps.
1. Turn off the unit demand for cooling or heating by using
the scrolling marquee. The scrolling marquee is located in
the control box at the compressor end of the unit.
a. Push the key unit a blank display screen
is shown.
b. Push the key until the SERVICE TEST LED is
lit.
c. Push the key. The display will show
STOP.
d. Push the key again. The NO/YES display
will flash.
e. Push the or key to toggle the display to
YES and then push . The unit will be
locked off from heating, cooling or any operation.
The controls will still function and the display will
still operate.
2. Close the field-installed manual gas shutoff valve.
3. Turn off the electrical power to the unit using the optional
disconnect or the field-installed disconnect and lock off
using proper lockout and tag-out procedures.
4. Open the burner section hinged access door.
5. Move the switch on the gas valves to the OFF position
and wait 5 minutes.
NOTE: If this is the first installation of the unit, the gas
flue hoods must be installed before operating unit. These
must be installed for the unit to run properly.
6. Move the switch on the gas valves to the ON position.
7. Close the burner section hinged access door.
8. Turn on the electrical supply to the units.
9. Open the field-installed manual gas valve.
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
flammable 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 sup-
plier, call the fire department.
— Installation and service must be per-
formed by a qualified installer, service
agency or the gas supplier.
Improper installation, adjustment, alteration, service, or
maintenance can cause injury or property damage. Refer to
this manual. For assistance or additional information, con-
sult 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 personal injury.
Do not attempt to light by hand; personal injury 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.
3. Never attempt to manually light the unit with a match,
lighter, or any other flame. If the electric sparking de-
vice fails to light the burners, 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, injury, or
loss of life.
ESCAPE
ENTER
ENTER
ENTER
48ZG,ZN030-105
48ZT,ZW,Z6,Z8075-105
Gas Heating/Electric Cooling Units
with COMFORTLINK™ Controls