Baxi Potterton 47-393-40, 47-393-39, 47-393-41, 47-393-42 manual Flue

	Terminal Position with Minimum Distance (Fig. 18)	(mm)
A1	Directly below an opening, air brick, opening
B1	windows, etc.	300
	Above an opening, air brick, opening window etc.	300
C1	Horizontally to an opening, air brick, opening window etc.	300
D2	Below gutters, soil pipes or drain pipes.	25 (75)
E2	Below eaves.	25 (200)
F2	Below balconies or car port roof.	25 (200)
G2	From a vertical drain pipe or soil pipe.	25 (150)
H2	From an internal or external corner.	25 (300)
I	Above ground, roof or balcony level.	300
J	From a surface or boundary line facing a terminal.	600
K	From a terminal facing a terminal (Horizontal flue).	1200
	From a terminal facing a terminal (Vertical flue).	600
L	From an opening in carport (e.g. door, window)
	into the dwelling.	1200
M	Vertically from a terminal on the same wall.	1500
N	Horizontally from a terminal on the same wall.	300
R	From adjacent wall to flue (vertical only).	300
S	From an adjacent opening window (vertical only).	1000
T	Adjacent to windows or openings on pitched and flat roofs	600
U	Below windows or openings on pitched roofs	2000

1In addition, the terminal should be no nearer than 150 mm to an opening in the building fabric formed for the purpose of accommodating a built-in element such as a window frame.

2Only ONE 25mm clearance is allowed per installation. If one of the dimensions D, E, F, G or H is 25mm then the remainder MUST be as shown in brackets, in accordance with B.S.5440-1.

NOTE: The distance from a fanned draught appliance terminal installed parallel to a boundary may not be less than 300mm in accordance with the diagram below

7.0Site Requirements

7.8Flue

NOTE: Due to the nature of the boiler a plume of water vapour will be discharged from the flue. This should be taken into account when siting the flue terminal.

1.The following guidelines indicate the general requirements for siting balanced flue terminals. For GB recommendations are given in BS 5440 Pt 1. For IE recommendations are given in the current edition of I.S. 813 “Domestic Gas Installations”.

2.If the terminal discharges onto a pathway or passageway, check that combustion products will not cause a nuisance and that the terminal will not obstruct the passageway.

3.If a terminal is less than 2 metres above a balcony, above ground or above a flat roof to which people have access, then a suitable terminal guard must be provided.

4.* Reduction to the boundary is possible down to 25mm but the flue deflector kit (part no. 5111068) must be fitted.

IMPORTANT:

• Under car ports we recommend the use of the plume

displacement kit.

• The terminal position must ensure the safe and

nuisance - free dispersal of combustion products.

Terminal	300 min
Assembly

Top View Rear Flue

Fig. 17

*

Plume

Displacement Kit

IMPORTANT: If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150mm from any opening windows or doors (see Section 9.0).

Property Boundary Line

T

J,K

R N

M

I I

F B

L

A

G

I

Likely flue positions requiring a flue terminal guard

Air Inlet

U

150mm

MIN.

D		A
C E
I	S	I
	F	J,K
	A

H H

Fig. 18

Opening Window or Door

Fig. 18a

20© Baxi Heating UK Ltd 2012