Utica Boilers SFE IV Steam 安装指导

RIDGE

2’ (.61 M) MIN.

MORE THAN 10’ (3.1 M)

10’ (3.1 M)

HEIGHT ABOVE ANY 

ROOF SURFACE WITHIN 

10’ (3.1 M)

HORIZONTALLY

CHIMNEY 3’ (.92 M)

GAS VENT OR

TYPE  L  VENT 

2’ (.61 M) MIN.

If oil fired water heater is vented into same flue as boiler, 

provide separate hole into chimney whenever possible. 

When this isn’t possible, use “Y” connection in flue pipe, 

using separate draft regulator for each unit. 

When chimney does not provide adequate draft to handle 

input from water heater and boiler simultaneously, wire 

units so only one will operate at a time, favoring water 

heater.

• Inspect chimney to make certain it is constructed 

according to the latest revision of the NFPA 211. Local 

regulations may differ from this code and should be 

checked. Where there is a conflict, the local code will 

prevail.

• Install boiler into chimney having a masonry or metallic 

chimney liner.

• Unlined chimney will have leaks that will cause poor 

chimney performance (no draft), and could result in 

positive pressure in the combustion chamber.

• Horizontal portions of venting system should not 

exceed 10 feet in length. Horizontal lengths over 10 ft. 

will have a negative effect on  chimney performance.

• Extend chimney at least 2 ft. above any portion of 

building within 10 ft.  Producing a -.02 inch W.C. draft 

in the combustion chamber. See Figure #11.

• See Ratings Table page 3 for recommended minimum 

chimney or vent sizes. 

• Inadequate draft causes improper combustion, 

resulting in dirty flue ways and high fuel bills.

• Connect flue pipe same size as boiler outlet to chimney, 

sloping upward continuously toward the chimney 

approximately ¼" per foot. Bolt or screw joints 

together to avoid sag.

Boiler is to be vented by natural draft and shall not 

be connected into any portion of mechanical draft 

operating system under positive pressure.