MISCELLANEOUS
BURNERS
Visually inspect the burner flames periodically during the heat- ing season. Turn on the furnace at the thermostat and allow several minutes for flames to stabilize, since any dislodged dust will alter the flames normal appearance. Flames should be stable, quiet, soft, and blue (dust may cause orange tips but they must not be yellow). They should extend directly outward from the burners without curling, floating, or lifting off. Flames must not impinge on the sides of the heat exchanger firing tubes.
INDUCED DRAFT AND CIRCULATOR BLOWERS
The bearings in the induced draft blower and circulator blower motors are permanently lubricated by the manufacturer. No fur- ther lubrication is required. Check motor windings for accumu- lation of dust which may cause overheating. Clean as neces- sary.
FLAME SENSOR (QUALIFIED SERVICER ONLY)
Under some conditions, the fuel or air supply can create a nearly invisible coating on the flame sensor. This coating acts as an insulator causing a drop in the flame sense signal. If the flame sense signal drops too low the furnace will not sense flame and will lock out. The flame sensor should be carefully cleaned by a qualified servicer using emery cloth or steel wool. Following cleaning, the flame sense signal should be as indi- cated in the Specifications Sheet.
FLUE PASSAGES (QUALIFIED SERVICER ONLY)
The heat exchanger flue passageways should be inspected at the beginning of each heating season. If necessary, clean the passageways as outlined below.
1.Turn OFF the electrical power and gas supply to the furnace.
2.Disconnect the gas line and remove the burner/ manifold assembly by removing the screws securing the assembly to the partition panel.
3.Disconnect the flue pipe system from the induced draft blower.
4.Remove the induced draft blower and collector box cover.
5.Clean the primary heat exchanger tubes using a wire brush attached to a length of high grade stainless steel cable, such as drain cleanout cable. Attach a variable speed reversible drill to the other end of the cable. Slowly rotate the cable with the drill and insert it into one of the heat exchanger tubes. While reversing the drill, work the cable in and out several times to obtain sufficient cleaning. Repeat for each tube.
6.Clean residue from furnace using a vacuum cleaner.
7.Replace the parts removed in the previous steps in reverse order.
8.Turn on electrical power and gas to furnace. Check for leaks and proper unit operation.
9.Severe heat exchanger fouling is an indication of an operational problem. Perform the checks listed in Startup Procedure and Adjustments to reduce the chances of repeated fouling.
BEFORE LEAVING AN INSTALLATION
•Cycle the furnace with the thermostat at least three times. Verify cooling and fan only operation.
•Review the Owner’s Manual with the homeowner and discuss proper furnace operation and maintenance.
•Leave literature packet near furnace.
REPAIR AND REPLACEMENT PARTS
•When ordering any of the listed functional parts, be sure to provide the furnace model, manufacturing, and serial numbers with the order.
•Although only functional parts are shown in the parts list, all sheet metal parts, doors, etc. may be ordered by description.
•Parts are available from your distributor.
Functional Parts List- |
|
Gas Valve | Blower Motor |
Gas Manifold | Blower Wheel |
Natural Gas Orifice | Blower Mounting Bracket |
Propane Gas Orifice | Blower Cutoff |
Igniter | Blower Housing |
Flame Sensor | Inductor |
Rollout Limit Switch | Heat Exchanger |
Primary Limit Switch | Auxiliary Limit Switch |
Pressure Switch | Integrated Control Module |
Induced Draft Blower | Transformer |
Door Switch |
|
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