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4. Operational Check:
cCAUTION: Before troubleshooting, familiarize yourself with the start up and
check out procedures
NOTICE: After reassembling the appliance, check for fuel oil leakage from the
supply piping.
a. Check proper operation of the ignition system and for proper combustion.
b. Observe the main burner flame. If the flame appears strange or abnormal in character, look for a
component or components that were not reassembled correctly. If the components have been
reassembled correctly, check for a blocked vent, malfunctioning combustion air blower or fuel pump,
and partially blocked burner nozzle.
D. ELECTRICAL SYSTEM:
cWARNING: When servicing controls, label all wires prior to disconnecting.
Correctly reconnect any wires removed during servicing. Wiring errors can cause
improper and dangerous operation. Dangerous operation can result in injury or
damage.
1. Check all wiring for loose connections and any signs of damage, or unusual wear. Replace any
damaged or frayed wiring and tighten any loose connections.
2. Use a voltmeter, or a multimeter, to check for adequate voltage at the field connections when the
appliance operating.
3. Use an ammeter, or a multimeter, to check the current draws of the blower motor and burner assembly,
to assure they are not exceeding rating label current specifications for each component. Also, refer to
Table 10 in the electrical wiring section of this manual for electrical specifications on these components.
4. Check for correct operation and proper settings (if manually adjustable) of all controls.
E. SUPPLY/RETURN AIR BLOWER:
Check in the blower compartment for dust, dirt, debris, and for the presence of insects. Remove any
foreign material. Clean the blower wheel, housing, and compartment of dust and lint with a vacuum.
The blower motor has sealed bearings that are permanently lubricated. The blower motor bearings do
not require oil or any type of additional lubrication.
F. SUPPLY/RETURN AIR FILTER:
The filter rack is located in the blower compartment of the furnace. The filters should be inspected
regularly. When the filters are dirty, they should be cleaned or replaced to assure proper heating/cooling
system operation. Follow the cleaning, removal and replacement procedure below.
Filter maintenance procedure:
Shut off the electrical power to the unit. Open the blower access door. Slide the air filters out of the filter
rack. Clean the filters by either vacuuming, rinsing with tap water, hosing, or dipping in an ordinary
detergent solution. After cleaning and drying the filters, replace the completely dry filters in the rack. If the
filter has a supporting mesh, the mesh side of the filter must be placed towards the furnace.