Installation Manual

19
Electrical
WARNING:
Thisunit mayhavemore than oneelectrical
supply.Toavoidriskofelectricalshock,personal
injury,ordeath,disconnectallelectricalpower
totheunitbeforeperforminganymaintenance
or service.
CAUTION:
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Inspect the electrical connections for tightness at the
beginning of each heating and cooling season. Service
as necessary.
Motor / Bearing Lubrication
WARNING:
Lubrication of the motors in this unit is not
required. Do not lubricate any motor in this
product.
• Theblowerassemblyinthisunitisequippedwithtwo
support bearings. The support bearings are sealed
cartridge units and require no further lubrication.
• Theindoorblowermotorispre-lubricatedatthefactory
and does not require additional lubrication.
• Thecombustionairblowermotorandoutdoorfanmotors
are equipped with pre-lubricated sealed ball bearings.
Nofurtheroilingisrequiredforthelifeofthisproduct
Heat Exchanger & Burner Maintenance
WARNING:
Holesintheheatexchangercancauseproducts
ofcombustiontoenterthestructure.Replace
theheatexchangerifleaksarefound.Failure
topreventproductsofcombustionfrombeing
circulatedintotheoccupiedspacecancreate
potentially hazardous conditions including
carbonmonoxidepoisoningthatcouldresult
inpersonalinjuryordeath.
The unit should operate for many years without excessive
scale buildup in the heat exchanger, however, the heat
exchanger, the vent system, and the burners should be
inspected and cleaned (if required) by a qualified technician
annually to ensure continued safe operation. Particular
attention must be given to identify deterioration from
corrosion or other sources.
Vent Cover Assembly
Inspect and clean the screen of the vent cover assembly
at the beginning of each heating and cooling seasons.
Cleaning of Burners
It is recommended that the burners be inspected and
cleaned periodically (if required) by a qualified technician
annually to ensure continued safe operation. Particular
attention must be given to identify deterioration from
corrosion or other sources. If the burners must be cleaned,
follow the steps below.
1. Shut off the gas supply to the unit either at the meter
or at a manual valve in the supply piping.
2. Turn off all power to the unit and set the thermostat to
the lowest temperature setting.
3. Remove the louvered access panel from the unit.
4. Turn the gas control knob to the “OFF” position.
CAUTION:
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
5. Disconnect the wires from the gas valve, ignitor, and
flame sensor.
6. Using two wrenches, separate the ground-joint union
in the gas supply piping at the unit.
7. Remove the piping between the gas valve and the
ground-joint union (if necessary).
8. Remove four screws securing the burner assembly to
the unit.
9. Carefully remove the burner assembly from the unit.
DO NOT DAMAGE THE IGNITOR WHILE REMOVING
THE BURNER ASSEMBLY.
10. Inspect the burners for accumulated dust or debris.
If necessary, carefully clean them with a soft wire
brush and/or the nozzle of a vacuum cleaner. DO
NOT DAMAGE THE IGNITOR OR FLAME SENSOR
WHILE CLEANING THE BURNER.
11. Replace all the parts in reverse order from which they
were removed.
12. Follow the lighting instructions found on the right
side door to return the unit to operation. Verify proper
operation after servicing.
CleaningofHeatExchanger
If the heat exchanger must be cleaned due to soot or
scale build up, follow the steps below.
1. Shut off the gas supply to the unit either at the meter
or at the manual valve in the gas supply piping.
2. Turn off all power to the unit and set the thermostat to
the lowest temperature setting.