To Shut Down Furnace; Burners; Manual Reset Overtemperature Control; Pressure Switch - Trane Oxbox 14 Seer Series Installation Instructions Manual

WARNING
The spark ignitor and ignition lead from the ignition control are
high voltage. Keep hands or tools away to prevent electrical
shock. Shut off electrical power before servicing any of the
controls. Failure to adhere to this warning can result in personal
injury or death.
The initial start-up on a new installation may require the control
system to be energized in some time until any air has bled through the
system and fuel gas is available at the burners.

6.4 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 gas valve to the"OFF"position.
5. Replace control door.
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.

6.5 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.

6.6 MANUAL RESET OVERTEMPERATURE CONTROL

A manual reset overtemperature control is located on the burner
shield. This device 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.
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 conditions of operation. Failure to do so can result in
Carbon Monoxide poisoning or death. Replace this control only
with the identical replacement part.

6.7 PRESSURE SWITCH

This furnace has a negative pressure switch for sensing a blocked
exhaust or a failed induced draft blower. It is normally closed when the
induced draft blower starts, indicating air flow through the combustion
chamber.

6.8 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 maximum outlet air
temperature. WARNING: DO NOT JUMPER THIS DEVICE! Replace
this control only with the identical replacement part.
installation & owner's manual
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7.0 SYSTEM OPERATING INFORMATION

7.1 ADVISE THE CUSTOMER

1. Keep the air filters clean. 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 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 thermostat operation.
6. Except for the mounting platform, keep all combustible articles
three feet from the unit and exhaust system.
7. IMPORTANT: Replace all blower doors and compartment after
servicing the unit. Do not operate the unit without all panels and
doors securely in place.
8. Do not allow snow or other debris to accumulate in the vicinity of the
appliance.
7.2 FURNACE SECTION MAINTENANCE
The unit's furnace should operate for many years without excessive
scale build-up in flue passageways; and it should have a qualified
installer, service agency, or gas supplier annually inspect the flue
passageways, the exhaust system and the burners for continued safe
operation, paying particular attention to deterioration from corrosion
or other sources.
If during inspection the flue passageways and exhaust system are
determined to require cleaning, the following procedures should be
followed (by a qualified installer, service agency, or gas supplier):
1. Turn off the electrical power to the unit and set the thermostat to the
lowest temperature.
2. Shut off the gas supply to the unit either at the meter or at manual
valve in the supply piping.
WARNING
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation
resulting in fire ,electrical shock, property damage, personal
injury or death.
3. Remove the furnace controls access panel and the control box
cover.
4. Disconnect the gas supply piping from the gas valve.
5. Disconnect the wiring to the induced draft blower motor, gas valve,
flame sensor, and flame roll-out control, and igniter cable. Mark all
wires disconnected for proper reconnection.
6. Remove the screws (4) connecting the burner tray to the heat
exchanger mounting panel.
7. Remove the burner tray and the manifold assembly from the unit.
8. Remove the screws (4) connecting the induced draft blower to the
collector box and screws (16) connecting the collector box to the
heat exchanger mounting panel. Remove the induced draft blower
and the collector box from the unit.
9. Remove the turbulators from inside the heat exchangers by
inserting the blade of a screwdriver under the locking tabs. Pop the
tabs out of the expanded grooves of the heat exchanger. Slide the
turbulators out of the heat exchangers.
10. Direct a water hose into the outlet of the heat exchanger top. Flush
the inside of each heat exchanger tube with water. Blow out each
tube with air to remove excessive moisture.
11. Reassemble (steps 1 through 10 in reverse order). Be careful not
to strip out the screw holes used to mount the collector box
and inducer blower. Replace inducer blower gasket and
collector box gasket with factory replacements if damaged.
WARNING
Holes in the exhaust transition or heat exchanger can cause toxic
fumes to enter the home. The exhaust transition or heat
exchanger must be replaced if they have holes or cracks in them.
Failure to do so can cause Carbon Monoxide poisoning resulting
in personal injury or death.