FULTON FB-A 10, Instruction, Operation And Maintenance Manual

Page: 47 / 102

40-G 1/01
Conventional Venting
a)
The stack should rise continuously
to the connection with the chimney,
and should contain no more than two
bends at 45 angles or less. If required
as the result of space limitations, one
90 elbow can be fitted at the back of
the boiler. There should be two feet of
straight, horizontal flue before any
bends or turns. Any alternative stack
arrangement must supply a negative
.02 to.04” W.C. pressure (0.508 to
1.016 mm) with the burner off.
b ) The run in the total distance of
stack ducting, as measured in a
straight line from the outlet of the
boiler to the outlet of the stack,
should not exceed 25% of the rise.
With the exception of a duct run
described in Item a, horizontal sec-
tions of ducting must be avoided,
and should not exceed four feet of
total run.
c) The stack and chimney material
shall comply with all local codes.
d) Adequate provision must be
made for the support of the weight of
the chimney and stack to avoid hav-
ing too great a load imparted to the
flue outlet connection of the boiler.
e ) The proper flue size and draft
control is most important for proper
burner operation. The flue must be as
large or larger than the outlet on the
boiler. Avoid flue piping and elbows
by placing the boiler as close as pos-
sible to the chimney.
f) A mechanical draft regulator
should be installed in the flue
outlet. Do not install the draft regu-
lator prior to the first turn of the flue.
BHP Boiler Flue Size
Inches Millimeters
6 6 152
9.5 6 152
10 6 152
15 8 203
20 10 254
30 12 305
40 12 305
50 12 305
60 12 305
g) The installer should check the
draft with a meter at negative .02 to
.04” W.C. pressure (0.508 to 1.016
mm) with the burner off.
Roof
Minimum
6' Above
Any Structure
Within 30'
Support As
Necessary
Install
Appropriate
Weather
Cap
Horizontal
Run 2'
Draft Regulator
(If Necessary) Draft Regulator
(If Necessary)
Expansion Joints
As Required
Horizontal
Run 2'
Cleanout
Door
60°
(45° Min.)
Cleanout
Door
Cleanout
Door
This Distance
Must Not
Exceed 25%
Of Total Rise
Baffle
3'
3'
30°
Max
Stagger
Entrances
A A
A-A
Total
Rise
Description/Instructions
4
6
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