Crown Boiler TWZ175 - Manual (Page 28)

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f) Thoroughly brush boiler flueways from the top and diagonally between casting pin rows. Be careful when brushing the
rear passage not to damage the rear target wall insulation.
g) Vacuum soot and debris from combustion chamber.
h) Check condition of rear target wall insulation, combustion chamber liner, and burner door insulation; replace if required.
i) Check burner head for signs of deterioration. Clean the head of any deposits.
j) Close burner door, reinstall 5/16” bolts, reconnect fuel oil and electrical lines.
k) Installation of boiler canopy, jacket top panel barometric draft regulator and breeching piping is done in reverse order
of removal. Make sure canopy is sealed tight to the casting; replace ceramic fiber sealing strips as needed. All vent piping
joints must be flue gas leak free and secured with sheet metal screws.
3) Inspect the vent system:
a) Make sure that the vent system is free of obstructions and soot.
b) Make sure that all vent system supports are intact.
c) Inspect joints for signs of condensate or flue gas leakage.
d) Inspect venting components for corrosion or other deterioration. Replace any defective vent system components.
4) Service the oil burner:
a) Replace oil nozzle with identical make and model (see Table 3).
b) Inspect the electrodes. Replace if they are deteriorated. Make sure that the electrode position is set according to the
burner manufacturer’s instructions.
c) Remove and clean fuel pump strainer.
d) Remove any accumulations of dust, hair, etc. from the air shutter, blower wheel, and other air handling parts of the
burner.
5) Replace the fuel oil line filter element and gaskets.
6) Inspect all oil piping and fittings for kinks and leaks. Repair any found.
7) Inspect the hydronic piping, tankless coil gasket, and boiler plugs for water leaks. Repair any leaks found immediately.
8) Verify operation of relief valve by manually lifting lever; replace relief valve immediately if valve fails to relieve pressure.
9) Open fuel line shut-off valve(s) and restore electrical power to the boiler.
10) Fire the boiler and check it out using the procedure outlined in “Start-up and Checkout” . This must include checking the
burner adjustments using instruments. Check for proper operation of all controls.
IMPOrtant
• CLEAN THE BOILER EVEN IF THERE ARE NO SIGNIFICANT SOOT DEPOSITS. FAILURE TO
REMOVE ALL SULFUR AND ASH DEPOSITS ANNUALLY CAN CAUSE SEVERE CORROSION
DAMAGE.
• WHEN CLEANING THE REAR FLUE PASSAGE, BE CAREFUL NOT TO PUSH THE BRUSH TOO FAR
BEYOND THE BOTTOM OF THE PINS. DOING SO MAY DAMAGE THE TARGET WALL.
WARNING
WATER LEAKS CAN CAUSE SEVERE CORROSION DAMAGE TO THE BOILER OR
OTHER SYSTEM COMPONENTS. REPAIR ANY LEAKS FOUND IMMEDIATELY.