AAON RN Series User Manual

106
Gas Heating Maintenance
Make sure all gas supply lines have been
purged of air before turning on the electrical
power switch. Turn the gas valve to the on
position (see startup instructions). Turn the
main electrical power on and set the controls
to the heating mode of operation.
The combustion ventilation motor will
enable. The control will automatically supply
energy to the igniter and the gas valve after
the heating call is made.
The flame sensing probe detects the presence
of the flame. Should no flame be detected in
10 seconds, the ignition system will recycle.
If no flame is detected after 3 tries, ignition
system will lockout.
Remove the call for heating. The main gas
valves shall be extinguished.
The supply fans are controlled by the ignition
system. In the fan “Auto” mode the fan
comes on 45 seconds after the flame is proved
and goes off 120 seconds after the heating
call is removed.
Furnace combustion ventilation air and flue
openings shall be checked annually for debris
and obstructions. If vent extensions are used
they shall meet category III requirements.
This appliance contains a wire screen at the
vent outlet. Each heating season, prior to
placing the appliance in heat mode
maintenance check that no debris or foreign
matter has accumulated in the vent outlet. A
good practice is to check for debris each time
the air filters are changed.
In the event the vent outlet becomes blocked
do not attempt to start the appliance in heat
mode until the entire vent opening is cleared.
In the event the unit shut down because the
vent was blocked a qualified technician or
service agency shall monitor the unit prior to
re-starting.
The gas burner and heat exchanger should
never require cleaning. If cleaning is
necessary, this indicates faulty operation of
the unit. Cleaning shall only be done by a
qualified service agency and only after
consultation with an AAON service
representative.
If induced draft blower/motor assembly has
to be replaced, care must be taken to provide
an airtight seal between the blower housing
and the burner box.
Gas Heat Exchanger Removal
Once a year, before the unit is in
operation for the heating season, a
qualified service technician must
inspect all flue product carrying areas
of the furnace and main burners for
continued safe operation.
WARNING
LEAK CHECK GAS PIPE
The gas pipe in the unit shall be
checked for leaks before startup. Leak
checking is the responsibility of the
installing contractor. All connections
shall be checked for leaks annually
after installation. Failure to leak check
could result in fire, explosion, or other
hazardous situations.
DANGER
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
WARNING

AAON RN Series Specifications

General

Category	Heat Pump
HSPF	Up to 10.0
Refrigerant	R-410A
Compressor Type	Scroll
Efficiency	High
Series	RN
Voltage Options	208-230/460V
Unit Weight	Varies with model
Dimensions	Varies with model