Mamiya C28, C32, C24 manual Installation, Fitting the Flue System

INSTALLATION

INSTALLATION

11 FITTING THE FLUE SYSTEM

The minimum and maximum equivalent length for

co---axial pipes ø 60---100 and ø 80---125 mm are given in Table 7 for mini HE C24 and mini HE C28 and in Table 8 for mini HE C32 .

The minimum and maximum equivalent length for ø 80

mmtwin pipe systems are given in Table 9 for mini HE

C24 and mini HE C28 and in Table 10 for mini HE C32.

Cut the flue duct at the same level of the air duct edge.

Cut this end

Groove

For roof flue systems having a flue length greater than 3m and all twin pipe systems, a condensate drain kit must be fitted at the lowest point in the system. See the list of optional extras (frame 9) for available drain kits.

Refer to the assembly instructions contained within the chosen flue kit packaging for the correct assembly and installation.

The horizontal sections of flue pipes must have a slope not less than 1.5 deg. (25 mm per metre) towards the boiler.

In the flue kit of pack B the flue pipe is angled within the air duct therefore the air duct must be horizontally installed.

If one or more extensions need to be used they must be adequately supported so that there is no sag in the flue pipe and a minimum fall of 1.5 deg. (25 mm per metre) over the whole length towards the boiler is ensured.

Table 7 mini HE C24, mini HE C28
			Minimum	Maximum
Co	---axial 60---	100	0.3 (11.8”)	2.7	(8’ 10”)
Co	---axial 80---	125	0.5 (19.7”)	8.5	(27’ 10”)
Table 8 mini HE C32
			Minimum	Maximum
Co	---axial 60---	100	0.3 (11.8”)	1.8	(5’ 11”)
Co	---axial 80---	125	0.5 (19.7”)	6.0	(19’ 8”)
Co---	axial Flue kits.

Horizontal.

For calculation of total flue length, the distance MUST be measured from the centreline of the concentric elbow to the end of the terminal.

Vertical outlet

For calculation of total flue length, the distance MUST be measured from the centreline of the outlet connector at the boiler top panel to the end of the terminal grille.

For each additional 45û and 90û flue bend used, the maximum permissible length of flue system must be reduced by 1 m or 1,5 m respectively.

Cutting lengths of flue and air ducts

Horizontal Concentric

Air duct
	Wall thickness + 125 mm
Rear Outlet
	Wall thickness + 160 mm
Rear outlet+Stand---off
	Wall thickness + Gap +62 mm
Side Outlet --- RH
	Wall thickness + Gap +208 mm
Side Outlet --- LH

Twin pipe flue kits

For calculation of total flue length, the distance MUST be measured from the centreline of the flue duct/air duct connection to the end of the flue outlet grille/air inlet duct.

For each additional 45û M&F and 90û M&F flue bend used, the maximum permissible length of flue system must be reduced by 0,9m or 1,65m respectively.

The restrictor to be used and the lengths of allowable equivalent flue outlet / air inlet ducts are indicated in Table 9 for mini HE C24, mini HE C28, in Table 10 for mini HE C32 and in the following graph.

The restrictor size is marked on its body.

N.B.: The air intake and the flue outlet must not terminate on opposite sides of the building.

Air intake adapter

Restrictor

Gasket

Table 9mini HE C24, mini HE C28

Equivalent pipe length	Restrictor
(air duct + flue duct)
Between 1 (39“) and 15 m (49’ 2”)	ø 50 mm
More than 15 m (49’ 2”) up to 30 m (98’ 5”)	ø 55 mm

Measure the wall thickness and, when using a side outlet, the	Table 10mini HE C32
gap between the inner wall and the boiler side casing.
Use the following chart to calculate the cutting length of air	Equivalent pipe length	Restrictor
duct.	(air duct + flue duct)
Mark the air duct making reference on the groove.	Between 1 (39“) and 24 m (78’ 9”)	ø 50 mm

16 mini HE --- Installation & Servicing