
See unit nameplate for manufacturer
and address.
504,502M
8/2002
Supersedes 10/2001
AWARNING 150, 180,
GCS16-072, 090,
(6, 7-1/2, 10, 12-1/2, 15, 20 TON)
ROOFTOP
UNITS
READ ALL INSTRUCTIONS IN THIS MANUAL
AND RETAIN FOR FUTURE REFERENCE
FBR113270
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Installation and service must be per-
formed by a qualified installer, ser-
vice agency or the gas supplier.
GCS16-090, 120, 150 SHOWN
-&WARNING
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Extinguish any open flames.
• Do not touch any electrical switch; do not
use any phone in your building.
• Leave the building immediately.
• Immediately call your gas supplier from a
neighbor's phone. Follow the gas suppli-
er's instructions.
• If you cannot reach your gas supplier, call
the fire department.
TeChnical
blications
Lithe U.S.A.
G_)2002
08/02
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIll
504,502M
IIIllllllllllllllllllllllllllHIIIIIIIIlllll

CONDENSER FAN
(2 ON -120 & -150 UNITS)
CONDENSER
FILTERS (4)
EVAPORATOR
COIL
HEAT EXCHANGERTUBES
COMBUSTION AIR
INDUCER
COIL
CONTROLBOX_
SIDE POWER ENTRY
(-072, -090 UNITS)
COMPRESSORS
(10N-072UNITS)
CONDENSER FANS (2)
FILTERS (6)
FRONT POWER ENTRY
(-120 & -150 UNITS)
EVAPORATOR COIL
FLUE BOX
COVER
GAS VALVE
BURNERS
CONDENSATE DRAIN
BOTTOM POWER ENTRY
BLOWER MOTOR (Requires additionalfield-installed kit;
refer to "Electrical Connections" section)
HEAT EXCHANGERTUBES
COMBUSTION
AIRINDUCER
CONDENSER COIL
CONTROL
COMPRESSORS(3)
COVER
IGNITION
CONTROL
GAS VALVE
CONDENSATE DRAIN
BLOWER MOTOR
POWER ENTRY
BOTTOM POWER ENTRY
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