Lochinvar 000 - 500 - Manual (Page 31)

o. Check “V” baffles on top of the heat
ex chang er. Remove and clean if necessary.
p. Remove soot from the heat exchanger with a stiff
bristle brush. Soot may also be re moved 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 re-installing. Use a vacuum to
remove loose soot from surfaces and in
ner
chamber.
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 ap pli ance,
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 re-install the heat exchanger, “V”
baffles, jacket panels, and wires.
u. Reassemble all gas and water piping. Test for
gas leaks.
v. Cycle the appliance and check for prop er
operation.
FIG. 38A Outer Air Deflector and HEX Filler Bracket
5. Water Circulating Pump: Inspect pump ev ery 6
months and oil if required. Use SAE 30
non-detergent oil or lubricant specified by pump
man u fac tur er.
6. Keep appliance area clear and free from
com bus ti ble materials, gasoline and other
flammable vapors and liquids.
7. Check frequently to be sure the flow of com bus -
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 sur fac es. Inspection plugs are located at
both ends of the heat exchanger. In spec tion 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 ob served, inspections can be made
at the end of each six months of op er a tion.
9. Pilot Flame Adjustment Procedure - The pi lot
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 lo
ca tion of
cover screw.
b. Turn inner adjustment screw clock wise to
decrease or counterclockwise to increase pilot
flame.
c. If difficulty is experienced in ad just ing the
pilot flame, a tee may be installed in the pilot
line from the gas valve to the pilot burn er.
d. Replace pilot adjustment cover screw on valve.
Tighten firmly after adjustment to prevent gas
leakage.
31
"
FLAME ROLL-OUT SWITCH /
INTERLOCK SWITCH
LOWER FRONT
JACKET PANEL
UPPER FRONT
JACKET PANEL
OUTER AIR
DEFLECTOR
HEX FILLER
BRACKET