Utica Boilers UB90-200 Installationsanweisungen

Acidic nature of flue gasses condensing on aluminum boiler 

sections cause formation of aluminum oxide. This oxide 

formation is normal, is generally uniform throughout boiler 

sections, and represents negligible mass of aluminum that 

is consumed by oxidation during life of boiler. 

If left unchecked, this buildup may eventually cause 

blockage of flue gas passages in boiler sections, reducing 

efficiency, and ultimately shutting down boiler due to lack 

of combustion air flow. 

 Schedule annual service call by qualified service 

agency, which includes:

A.  Examine flue passages between boiler sections, 

burner, and condensate lines, and clean if 

necessary following annual examination and 

cleaning instructions in paragraph F (below).

B.  Visually inspect venting and air intake system for 

proper operation. If vent or air intake show any 

signs of deterioration or leakage, repair or replace 

immediately. Ensure proper re-assembly and re-

sealing of vent and air intake system.

C.  Check for and remove any obstruction to flow of 

combustion air or venting of flue gases. 

D.  Follow instructions for “Startup” on page 28.
E.  Follow “Checkout Procedure & Adjustments” on 

page 35.

F.  Visually inspect condensate drain line for proper 

operation. Check for deteriorated or plugged 

condensate drain line.

G.  Check all gasket joints for leakage, and tighten 

bolts or replace gaskets if necessary.

H.  Remove jacket front and top panels and check for 

piping leaks around relief valve and other fittings. 

Repair, if found. DO NOT use stop leak compounds.

Check boiler area is free from combustible materials, 

gasoline, and other flammable vapors and liquids.

Circulator pump and blower motor furnished with boiler 

are permanently lubricated from factory and require 

no further lubrication. Lubricate additional or non-

factory supplied pumps and/or motors according to 

manufacturer’s instruction.

Check for and remove any obstruction to flow of 

combustion air or venting of flue gases.

Check boiler area is free from combustible materials, 

gasoline, and other flammable vapors and liquids.

Remove jacket front and top panels. Check for piping 

leaks around relief valve and other fittings. If found, 

contact qualified service agency to repair. DO NOT use 

stop leak compounds.

Test relief valve. Refer to valve manufacturer’s 

instructions packaged with relief valve.

Visually inspect venting and air intake system for 

proper function. If vent or air intake show any signs 

of deterioration or leakage, contact qualified service 

agency to repair or replace immediately and ensure 

proper reassembly and resealing of vent and air intake 

system.

Visually inspect PVC condensate drain pipe for proper 

operation. If drain pipe shows any signs of blockage, 

leakage, or deterioration contact qualified service 

agency to clean, repair, or replace immediately.

Check air vent(s) for leakage.

Periodically During Heating Season
Where low water cutoffs are used, periodic inspection of 

low water cutoff is necessary, including flushing of float 

type devices. Refer to low water cut off manufacturer’s 

specific instructions.