Horizontal Flue/Chimney Systems - Baxi MainEco Heat 15 Installation And Service Manual

5 Before Installation
Fig. 14
32 MainEco Heat
5.3.8
1. The standard telescopic flue is suitable only for horizontal
termination applications. It allows for lengths between 315mm
and 500mm from elbow to terminal without the need for cutting
(ii)
(Fig. 14). Extensions of 250mm, 500mm & 1m are available.
(i)
2. All fittings should be fully engaged. The approximate
engagement is 40mm. Apply the lubricant supplied to the seal on
each fitting to aid assembly.
3. Maximum permissible Horizontal Concentric equivalent flue
lengths are:-
4. Any additional "in line" bends in the flue system must be taken
into consideration. Their equivalent lengths are:-
5. The elbow supplied with the standard horizontal telescopic
flue kit is not included in any equivalent length calculations.
Horizontal
Flues
Accessories & Fitting Guide supplied with the boiler. That
document includes details of vertical flue/chimney systems and
Plume Displacement Kits.
Flue Trims

Horizontal Flue/Chimney Systems

(60/100) (80/125)
6 metres 12 metres
135° bend
93° bend
Flue length is measured from point (i) to (ii) as shown
below.
Read this section in conjunction with the Flue
This bend is
equivalent to 1 metre
A
B
(i)
Total equivalent length =
A+B+C+2 x 90° Bends
NOTE: Horizontal flue extensions should
always be installed with a fall of at least
3° from the terminal to allow condensate
to run back to the boiler.
0.5 metres
1.0 metres
C
(ii)
This bend is equivalent
to 1 metre
7215845 - 01 (08/14)