Rheem RKKL Series, Installation Instructions Manual, Page: 35 / 56

TO SHUT DOWN FURNACE
1. Set the thermostat to the lowest setting.
2. Turn off all electric power to the appliance if service is to be performed.
3. Remove control door.
4. Move control knob to the “OFF” position.
5. Replace control door.
BURNERS
Burners for these units have been designed so that field adjustment is not
required. Burners are tray-mounted and accessible for easy cleaning when
required.
MANUAL RESET OVERTEMPERATURE CONTROL
Two manual reset overtemperature controls are located on the burner shield. These
devices senses blockage in the heat exchanger or insufficient combustion air. This shuts
off the main burners if excessive temperatures occur in the burner compartment.
Operation of this control indicates an abnormal condition. Therefore, the unit should be
examined by a qualified installer, service agency, or the gas supplier before being placed
back into operation.
PRESSURE SWITCH
This furnace has two pressure switches for sensing a blocked exhaust or a failed induced
draft blower. They are normally open and close when the induced draft blower starts, indi-
cating air flow through the combustion chamber.
LIMIT CONTROL
The supply air high temperature limit cut-off is set at the factory and cannot be adjusted. It
is calibrated to prevent the air temperature leaving the furnace from exceeding the maxi-
mum outlet air temperature.
IMPORTANT: Replace this control only with the identical replacement part.
VI. SYSTEM OPERATING INFORMATION
ADVISE THE CUSTOMER
1. Change the air filters regularly. The heating system operates better, more efficiently
and more economically.
2. Arrange the furniture and drapes so that the supply air registers and the return air
grilles are unobstructed.
3. Close doors and windows. This reduces the heating and cooling load on the system.
4. Avoid excessive use of exhaust fans.
5. Do not permit the heat generated by television, lamps or radios to influence the ther-
mostat operation.
6. Except for the mounting platform, keep all combustible articles three feet from the
unit and exhaust system.
35
!
WARNING
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT
OFF, SHUT OFF THE MANUAL GAS VALVE TO THE APPLIANCE
BEFORE SHUTTING OFF THE ELECTRICAL SUPPLY. FAILURE TO DO
SO CAN RESULT IN AN EXPLOSION OR FIRE CAUSING PROPERTY
DAMAGE, SEVERE PERSONAL INJURY OR DEATH!
!
WARNING
DO NOT JUMPER THIS DEVICE! DO NOT RESET THE OVERTEMPERATURE
CONTROL WITHOUT TAKING CORRECTIVE ACTION TO ASSURE THAT AN
ADEQUATE SUPPLY OF COMBUSTION AIR IS MAINTAINED UNDER ALL CON-
DITIONS OF OPERATION. FAILURE TO DO SO CAN RESULT IN CARBON
MONOXIDE POISONING OR DEATH. REPLACE THIS CONTROL ONLY WITH THE
IDENTICAL REPLACEMENT PART.
!
WARNING
DO NOT JUMPER THIS DEVICE! DOING SO CAN CAUSE A FIRE OR EXPLOSION
RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.