Utica Boilers UB95M-200 Installationsanweisungen

General Guidelines When Using Antifreeze
•  Use only antifreeze products recommended 

•  Continuous addition of make-up water will dilute 

power of antifreeze and change buffers ability to 

maintain pH.

•  Flush old antifreeze from system. Flush boiler and 

system separately.

•  Do not use antifreeze unless required.
•  Antifreeze, if needed, must be of type listed on 

next page due to their operational characteristics 

of : type 356 T6 aluminum at operating 

temperatures between 20°F (-6.7°C) and 250°F 

(121°C). (See Table 1 for allowable products.)

•  Always clean system prior to using antifreeze as 

stated in this supplement.

•  Be sure to follow antifreeze manufacturer’s 

instructions for use, safe handling and storage of 

their products. Refer to MSDS (Material Safety 

Data Sheets) provided by antifreeze manufacturer 

for potential hazards and first aid procedures for 

exposure or ingestion.

•  Antifreeze will raise pH of hydronic solution in 

heating system above recommended level due to 

corrosion inhibitors. Solution must be treated to 

maintain a pH within recommended level. Follow 

antifreeze manufacturer’s instructions to adjust 

pH. 

•  If system has leaked, water and antifreeze 

chemistry will need to be adjusted. To avoid 

damage to boiler, check pH and chemistry of boiler 

solution and consult the antifreeze manufacturer 

for recommendations. 

•  It is recommended that pH reading be taken 

annually, and adjusted as necessary. Follow 

antifreeze/inhibitor manufacturer’s instructions for 

details on how to adjust pH. 

•  Antifreeze solutions can break down over time. 

Failure to check antifreeze chemistry on annual 

basis  may result in accelerated corrosion of 

boiler and other system components. Consult with 

antifreeze manufacturer for recommendations.

•  Use of antifreeze in any boiler will reduce 

heating capacity as much as 10-20%. Take 

into consideration when sizing heating system, 

pumps and expansion tank. Consult antifreeze 

manufacturer’s literature for specific information 

on reduced capacity. 

•  Using antifreeze manufacturer’s instructions, 

determine freezing temperature needed and use 

correct amount of antifreeze. Never exceed 50% 

antifreeze by volume. 

•  Boiler operating pressure must remain below 15 

psi for antifreeze solutions that specify a maximum 

of 250°F (121°C). Otherwise, increase system 

operating/tank pressure to 20 psig.  Note: Refer