Flue Outlet - FULTON RB Series Installation, Operation And Maintenance Manual

Fulton Ltd
2.5

FLUE OUTLET

The height and type of flue will be subject to local planning regulations and approvals, and to the
requirements of the Clean Air Act or similar local regulations.
Note: Before erecting a flue, Public Health Authority and Planning permission must be obtained.
The following information is intended to provide assistance where the installation of a simple flue
is required. Where multi-boiler flues are necessary, or difficulties could be experienced, specialist
advice must be obtained.
Boilers are fitted with a flanged flue outlet. The flue manufacturer/installer must be consulted at an
early stage to ensure a correct mating component for flue connection (see Figure. 3).
The flue diameter must be the same or larger than the boiler flue outlet. A reduction in flue
diameter will cause additional resistance which could have an adverse effect on combustion.
Note: Avoid fitting 90° short radius elbows, 90° tees and long horizontal runs wherever possible.
Note: All horizontal flue runs should have a rising pitch of 15° minimum to prevent condensate build-up and
subsequent corrosion.
Note: Oil-fired boiler installations are generally more critical because of the sulphur content in the fuel and the
higher dew-point temperature.
Note: Specialist advice should be obtained on flue material and insulation.
RB Flange
Model A
400
1600
450
2600
550
3400
600
4800
650
5500
RB-RBC-IOMM-2015-1
A
B
C
Holes 15mm dia. equi-spaced
Material mild steel
Figure. 3 - Boiler Flue Flange
B C (PCD) Holes
300 360 6
350 410 6
450 510 6
500 560 8
550 610 8
12 mm
RBC Flue Connection
RBC Flange
Model A
350
600
400
750
400
1000
450
1250
500
1500
550
1850
550
2100
600
2500
650
3000
INSTALLATION - 2
B C (PCD) Holes
250 310 6
300 360 6
300 360 6
350 410 6
400 460 6
450 510 6
450 510 6
500 560 8
550 610 8
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