Utica Boilers UB90-200 Installationsanweisungen

Packaged boiler is furnished with iron piping in front 

boiler section for supply and return connections.

Install all of radiation units (panels, radiators, 

baseboard, or tubing) and supply and return mains 

first, when installation of boiler is for new heating 

system. 

After installation of all heating system piping and 

components; make final connection of system piping to 

boiler.

Hot water boiler installed above radiation level or 

as required by authority having jurisdiction must be 

equipped with low water cut off device (included with 

boiler). 

Periodic inspection is necessary, as is flushing of float 

type devices, per low water cut off manufacturers 

specific instructions.

Proper water flow through any boiler is essential to 

proper operation and long life. Simple single or two 

zone systems with adequate flow do not require 

primary secondary piping. Systems with more zones or 

low flow require primary secondary piping.

Two (2) 1-1/4” X 1-1/4” female to female dielectric 

isolation unions are supplied. Install dielectric isolation 

unions at boiler supply line and return line. Install 

isolation fittings nearest boiler prior to system piping 

connections. 

Water contaminants that cause low or high pH makes 

corrosion more likely.

Do not install copper supply and return piping directly 

into aluminum boiler section castings due to galvanic 

corrosion between dissimilar metals.  

Use iron, steel bushings or pipe connectors between 

copper system piping and boiler to make final 

connection to boiler. 

Use of dielectric unions is required, supplied with boiler, 

the purpose is to electrically insulate aluminum boiler 

from remainder of the system.