o. Check “V” baffles on top of the heat exchanger. Remove and clean if necessary.
p.Remove soot from the heat exchanger with a stiff bristle brush. Soot may also be removed from the heat exchanger by washing thoroughly with detergent and water. Remove the heat exchanger before using water for cleaning. Rinse thoroughly and dry before
q.Remove the heat exchanger (HEX) filler bracket (FIG. 38A).
r.The heat exchanger can be removed by sliding towards the front of the appliance. Once the heat exchanger is removed from the appliance, a garden hose can be used to wash the tubes to ensure that all soot is removed from the heat exchanger surfaces.
s.Ensure that all burner ports are cleaned to remove any soot. See Inspection and Cleaning Procedure, page 30.
t.Carefully
u.Reassemble all gas and water piping. Test for gas leaks.
v.Cycle the appliance and check for proper operation.
| UPPER FRONT |
| JACKET PANEL |
OUTER AIR |
|
DEFLECTOR |
|
HEX FILLER |
|
BRACKET |
|
FLAME | LOWER FRONT |
INTERLOCK SWITCH | JACKET PANEL |
FIG. 38A Outer Air Deflector and HEX Filler Bracket
5.Water Circulating Pump: Inspect pump every 6 months and oil if required. Use SAE 30
6.Keep appliance area clear and free from combustible materials, gasoline and other flammable vapors and liquids.
7.Check frequently to be sure the flow of combus- tion and ventilation air to the boiler is not obstructed.
8.Inspection of Heat Exchanger Waterways: Appliances operated in hard water areas should have periodic inspections of the tubes to be sure that no sediment or scale accumulates on the heat transfer surfaces. Inspection plugs are located at both ends of the heat exchanger. Inspection plugs should be removed and tubes inspected at the end of the first 45 days of operation and again at the end of 90 days of operation. If no scale accumulation is observed, inspections can be made at the end of each six months of operation.
9.Pilot Flame Adjustment Procedure - The pilot flame should envelop 3/8" to 1/2" (10 to 13mm) of the tip of the thermocouple (see Figure 38B).
"
FIG. 38B Pilot Flame on Thermocouple
a.Remove pilot adjustment cover screw on gas valve. See Gas Valve Illustrations in the Lighting Instructions section for location of cover screw.
b.Turn inner adjustment screw clockwise to decrease or counterclockwise to increase pilot flame.
c.If difficulty is experienced in adjusting the pilot flame, a tee may be installed in the pilot line from the gas valve to the pilot burner.
d.Replace pilot adjustment cover screw on valve. Tighten firmly after adjustment to prevent gas leakage.
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