Utica Boilers CuB Series 安装指导

•  Install piping in accordance with authority having jurisdiction.

Use two (2) wrenches when tightening and fi tting 

pipe to boiler's threaded fi ttings. Boiler's internal 

piping can be damaged if subjected to excessive 

torque.

• Support system piping and safety relief valve discharge  

piping. Boiler's internal piping and wall mount bracket 

can be damaged if subjected to excessive weight.

• Size central heating pump (and domestic hot water 

pump, if used) for system requirements only.  Internal 

heat exchanger pump compensates for pressure drop 

through boiler internal piping and heat exchanger.

•  Thoroughly clean and fl ush system before connecting to boiler.

•  If oil is present in system water, use approved detergent to 

wash system.

•  Flush system to remove any solid objects such as metal chips, 

fi bers, or Tefl on tape, etc.

• Water in the heating system must have protection of 

metallic materials against corrosion.

• Filling water and subsequent replenishing, must be 

clear, with hardness under 150 ppm CaCO3, 
A.  treated with approved conditioning chemicals 

to ensure prevention of corrosion and attack on 

metals and plastics, that gases do not form, 

B.  and bacterial or microbial masses do not proliferate 

in low temperature systems.

• Hardness exceeding 150 ppm CaCO3, appropriate water 

softening treatment and/or use of suitable anti-fouling 

agents must be provided.

Water contained in the system must be checked at least 

yearly and have: 

A.  pH above 7 and under 8.5 (under 8 with presence 

of components in aluminum or light alloys), 

B.  iron content (Fe) less than 0.5 mg/l, 

C.  copper content (Cu) less than 0.1 mg/l, 

D.  total content of chlorides, nitrates and sulfates less 

than 50mg/l, 

E.  must contain conditioning chemicals in 

concentration suffi cient to protect system for a 

year.

There must be no microbial or bacterial loads in low 

temperature systems.

Conditioners, additives, inhibitors and anti-freeze fl uids can 

be used only if manufacturer guarantees they are suitable 

for use in heating systems and they do not cause damage 

to heat exchanger or other components and/or materials of 

boiler and system.

Use of generic chemicals not specifi cally suitable for use in 

heating systems and/or incompatible with boiler materials 

and system is forbidden.

Conditioning chemicals must ensure complete deoxygenation 

of water and contain specifi c protective agents for yellow 

metals (copper and its alloys), anti-fouling agents for 

limescale at least up to 150 ppm CaCO3, pH neutral 

stabilizers and, in low temperature systems, specifi c biocides 

for use in heating systems.
In systems with continuous intake of oxygen (e.g. fl oor 

systems without anti-diffusion pipes, open expansion 

vessels), or intermittent (e.g. in case of frequent 

replenishing), a separator must be provided. Regarding 

domestic hot water (DHW), no type of treatment which 

could prevent its possible food use can be provided for.

• Poison hazard.  Ethylene glycol is toxic.  Do not 

use ethylene glycol.

• Never use automotive or standard glycol antifreeze, 

even ethylene glycol made for hydronic systems.

• Ethylene glycol can attack gaskets and seals used 

in hydronic systems.

• Use only inhibited propylene glycol solutions  

certifi ed by fl uid manufacturer as acceptable for 

use with closed water heating system.

• Thoroughly clean and fl ush any system that used 

glycol before installing new Boiler.

• Provide user with Material Safety Data Sheet 

(MSDS) on fl uid used.

Do not expose boiler to freezing temperatures. 

• System piping exposed to freezing conditions: Use 

inhibited propylene glycol solutions certifi ed by fl uid 

manufacturer for use with closed water heating system.  

Do not use automotive or ethylene glycol.

• Boiler installed above radiation level (or as required by 

authority having jurisdiction) shall have low water cutoff 

protection. 

• Boiler used in connection with refrigeration system.  

Install piping in parallel with boiler, with appropriate 

valves to prevent chilled medium from entering boiler.

• System piping connected to heating coils located in air 

handling unit exposed to refrigerated air circulation.  Install 

fl ow control valves or other automatic means to prevent 

gravity circulation of boiler water during cooling cycle.