Baxi Potterton Promax Combi HE Plus A Range Service Manual download pdf (Page 19)

7.0 Site Requirements

J,K

Likely flue positions requiring

a flue terminal guard

J,K

7.7 Flue

NOTE: Due to the high efficiency 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. Take into consideration the effect the plume of vapour may

have on neighbours when siting the flue.

4. Adjacent surfaces close to the flue terminal may need

protection from the effects of condensation. Alternatively a flue

deflector kit (part no. 248167) is available.

5. For installation of the flue into an internal corner at the

25mm dimension the flue deflector kit (part no. 248167) must

be fitted.

6. * Reduction to the boundary is possible down to 25mm but

the flue deflector kit (part no. 248167) must be fitted.

7. If required a suitable terminal guard is available from Baxi for

use with the flue deflector.

8. For fitting under low soffits and eaves it is acceptable for the

flue to project upto 500mm from the face of the wall to the

inside of the air intake. This can be painted if required using a

suitable external paint.

9. If a terminal is less than 2 metres (78

in) above a balcony,

above ground or above a flat roof to which people have access,

then a suitable terminal guard must be provided.

IMPORTANT:

• Only ONE 25mm clearance is allowed per installation.

• 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.

Fig. 17

Fig. 16a

300 min

Terminal

Assembly

Top View Rear Flue

Property Boundary Line

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

Table. 2

Terminal Position with Minimum Distance (Fig. 17) (mm)

Directly below an opening, air brick, opening

windows, etc. 300

Above an opening, air brick, opening window etc. 300

Horizontally to an opening, air brick, opening window etc. 300

D Below gutters, soil pipes or drain pipes. 25

E Below eaves. 25

F Below balconies or car port roof. 25

G From a vertical drain pipe or soil pipe. 25

H From an internal

(i)

or external

(ii)

corner.

(i)

(ii)

115

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

In 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. See BS 5440 Pt. 1.

Opening Window

or Door

100mm

MIN.

Fig. 17c

Plume

Displacement Kit

Air Inlet

IMPORTANT: If fitting a Plume

Displacement Flue Kit, the air inlet

must be a minimum of 100mm from

any opening windows or doors (see

Section 9.0).

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Baxi Potterton Promax Combi HE Plus A Range Service Manual Page 19

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