Bosch Appliances 24I RSF manual Internal Fitting of the Duct Assembly, Flue Bends

11.5 INTERNAL FITTING OF THE DUCT ASSEMBLY	Fig. 20. Duct and terminal assembly for
The rubber sealing gasket and the clamping ring are available from
Worcester Heat Systems.	internal fitting of the flue.
Measure and cut the ducts as previously described for external
fitting (Section 11.4). Fix the ducts to the terminal and fit the rubber
sealing gasket and clamp to the terminal. Centralise the gasket and
tighten the clamping ring. See Fig. 19. Slide the flue centering ring	Flue centring ring	Flue terminal
onto the air duct and tighten the screw. See Fig. 20. Fix the ducts
and terminal assembly to the flue turret as described in Section 11.4
preceding.

Fig. 19. Terminal assembly for internal fitting of the flue.

			Rubber sealing
			gasket		Flue duct
				Air duct	Rubber
	Flue terminal				sealing
				provided into the two ducts. (See Fig. 21).	gasket
		Clamping ring
				The length Y is the distance between bends the ducts must be
				cut to Y Ð 162mm. The swaged ends must be removed from the
				extension tube and only the air duct needs fixing. See Fig. 21.
				Z is the final flue length from the last elbow to the outside face of
				the external wall. The first duct sections fitted to the elbow must
				have unswaged ends. The length of the air ducts should be Z Ð
Apply the plastic tape provided to the last section of flue where it				196mm. The inner flue duct must be 30mm longer than the air
				duct. If Z Ð 196mm is less than 160mm then the terminal section
will be sealed to the external brickwork.
				will need to be shortened to the same length as the extension flue
Push the assembly through the wall so that the gasket flange is
				section fitted to the elbow (length Z Ð 100). If	flue extensions are
against the outside face of the wall. See Fig. 20.
				needed to attain the required length care must be taken to ensure
Align the flue turret with the socket on the appliance, push the
				that the last section of flue is longer than 260mm.
turret down to fully engage it and clamp in place with the turret
				Each extension must be connected to the previous section of flue
clamping ring. See Fig. 18.
				or bend by firstly fitting the inner flue ducts together and pilot
Refit the fan and replace the inner casing cover.
				drilling and fixing as above (See Fig. 21). Then the outer air ducts
Seal the gap around the duct with the flexible seal provided and
				can be similarly fixed using the pair of screws provided. The flue
make good. See Fig. 20.
				terminal section can then be telescopically adjusted and fixed as
11.6 FLUE BENDS
				before (See Fig. 21), ensuring the correct length of Z Ð 41.
See Figs 21 and 22.
				The silicon sealant supplied should be applied to the flue ducts
Measure distances X, Y and Z as appropriate.
				which engage into elbows. See Fig. 21.
Side flue duct length = X + 63mm. See Fig. 21.
				From inside, push the assembly through the wall
Rear flue duct length = X + 60mm. See Fig. 21.
				Align the flue turret with the socket on the appliance, push the
Cut the flue and air ducts which are to make up the first section
				turret down to fully engage it and clamp in place with the turret
X such that both the assemblies are of equal length (either X +
				clamping ring. See Fig. 18.
63mm or X + 60mm). Extensions will be necessary to allow X to
				Make good the internal and external brickwork or rendering.
be larger than 250mm.
				Refit the fan. Do not use any sealant on the joint. Replace the
Any extension ducts are fixed by drilling a pilot hole through the
				inner casing cover.
hole in the duct or elbow and screwing the self tapping screw

Fig. 21. Flue bends.		Z
	56mm	Z Ð 41mm

Y Ð 162mm

X

Side flue X + 63mm Rear flue X + 60mm

Y

56mm

14