Utica Boilers CuB Series 安装指导

Chimney must be clean, right size, properly constructed

and in GOOD CONDITION.

Installation must conform to requirements of the 

authority having jurisdiction or, in absence of such 

requirements, to the National Fuel Gas Code, ANSI 

Z223.1/NFPA 54 and/or Natural Gas and Propane 

Installation Code, CAN/CSA B149.1.

Increaser fi tting is required on this boiler for Category I 

venting, and 4” is minimum permissible vent diameter. 

This does not imply vent connector is intended to be 4” 

diameter pipe. Vent connector shall be sized according 

to appropriate venting tables in the National Fuel 

Gas Code and may be required to be larger than 4” 

diameter. 

Boiler installation for chimney venting is not

complete unless increaser fi tting is located and

secured.

These are Category I and Category III high effi ciency 

boilers with lower stack or exhaust temperature.

Venting into masonry chimney without liner, line 

chimney from top to bottom with either:
A.  Listed Type B vent pipe
B. Listed fl exible vent liner
C.  Poured ceramic liner.

Outside chimneys should not be used unless they are 

(choose one of the following):
A.  Enclosed in a chase
B.  Lined with Type B vent pipe
C. Use listed fl exible vent liner
D. Use certifi ed chimney lining system

Vent connector from boiler to chimney should run as 

directly as possible with as few elbows as possible.

Common venting shall not be allowed. Boiler and 

other certifi ed appliances. appliances can share same 

chimney vent. Consult appropriate Vent Sizing Tables 

in National Fuel Gas Code for specifi c requirements of 

multiple appliance venting.

Boiler is only appliance connected to vent, Type B vent 

pipe is recommended for vent connector.

Slope pipe up from boiler to chimney not less than 1/4” 

per foot (21mm/m).

End of vent pipe must be fl ush with inside face of 

chimney fl ue. Use sealed-in thimble for chimney 

connection.

Fasten sections of vent pipe with sheet metal screws to 

make piping rigid. Use stovepipe wires to support pipe 

from above.

Do not connect to fi replace fl ue.

Do not install damper on this boiler.

Boiler and venting installations shall be performed 

by a qualifi ed service agent and in accordance with 

the appropriate manual. Installing or venting boiler 

or other gas appliance with improper methods or 

materials may result in serious injury or death due 

to fi re or to asphyxiation from poisonous gases such 

as carbon monoxide with is odorless and invisible.

     

Do not connect boiler to any portion of mechanical 

draft system operating under positive pressure.

     

3”

3”

Horizontal Venting requires fi eld supplied appliance adapter 

for the boiler fl ue outlet.  

Boiler is provided with a 3” vent connection, 3” x 4” 

increaser must be fi eld sourced for chimney application. 

This does not mean that the connection to the chimney will 

always be 4”.