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HB Herringbone Flue Connection

HB Herringbone Fan to Flue arrangement.

General

The Type ‘0’ and Type ‘2’ vacuum fans have bottom horizontal discharge with rectangular connections (flanged on the type 0) and must be mounted in that position by means of the fan support stool onto a suitable platform or brackets fixed to the building structure.

For details of the fan outlet flange fixing holes see drawing below.

For details of fan mounting bracket and fixing down holes see drawing below.

Legend

Fan Type

Type ‘O’

Type ‘2’

A

124

80

B

38

35

C

175

174

D

7.1

7

E

209

125

F

153

100

G

42

25

H

239

120

J

340

210

K

332

205

L

363

215

 a A conventional flue arrangement. (See figures d and e below)
 b A telescopic through the wall flue. (See figure c below)

Where a conventional flue is to be installed, Ambi-Rad supply an aluminium transformation piece to which a 150mm (6in) diameter flue should be attached.

The maximum length of flue which may be connected to the fan outlet must be calculated in accordance with the Ambi-Rad Herringbone design manual (Ref 042/93 - see attachments below) and must be adequately supported from the building structure.

Exhaust flues should be installed in accordance with the British Standard Code of Practice BS 5440: Part 1:1990 – Flues for Gas Appliances, I.E.E. Regulations, Local Ministry Authorities and Building Regulations.

Conventional Fan to Flue Arrangements.

fig.a High fan arrangement

fig.b Low fan arrangement

fig.c Stainless steel telescopic throught the wall arrangement (available for type 'O' and type '2' fans)

fig.d Conventional flue arrangement - roof exit.

fig.e Conventional flue arrangement - wall exit


Condensate trap

fig.f Collecting chamber arrangement

Ensure that a 1½ in. drain tube is fitted to the connection on the under side of the non-return valve (C).

The drain tube must be resistant against the action of flue gas condensate and suitable for operation up to a maximum temperature of 50°C.

Ensure that the drain tube is adequately supported.

Copper or copper based alloy shall not be used for condensate drains.

See BS 6896:1991. Preferably the condensate pipe should run and terminate internally to a soil and vent stack or a waste pipe. Alternatively, the condensate can be discharged into the rainwater system or a purpose-made soakway.

All connecting drainage pipework should have a fall of at least 2.5° to the horizontal or approximately 50mm per metre of pipe run.

If the drainage pipe has a run externally, it is recommended that the pipe is insulated to protect against frost.

It should be noted that the connection of a condensate pipe to a drain might be subject to local building controls.

The condensate drainage pipe should be run in a standard drain pipe material, e.g. polyvinyl chloride (PVC), unplasticized polyvinyl chloride (PVC-U), ancrylonitrile-butadiene-styrene (ABS), polypropylene polyproene (PP) or cross-linked polyviynyl chloride (PVC-C).

Any internal pipework should be of a diameter specified above.

Any external pipework should be kept to a minimum to avoid freezing and should have a diameter of not less than 22mm.

Ensure that the arrow on the non-return valves is facing down.

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Last Modified on 26/11/2007.
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