Separate Ducts; C43P Exhaust Type; Single Splitting Kit (Alternative Accessory) - DeDietrich MPX 28/33 BIC Instruction Manual

10.1.1 C43P EXHAUST TYPE

Collective positive pressure flue pipe for sealed chamber boilers
This type of installation is only possible with natural gas
boilers (G20)
In order to connect the boiler to a C43P collective flue pipe, the non-
return valve is required.
The sizing of the flue pipe is defined by the conduit supplier in
accordance with EN 13384-2.
1 90° elbow Ø 80/125 mm
2
Conduit Ø 80/125 mm
3
Non-return valve Ø 80 mm
4 Adaptor Ø 60/100 -> 80/125 mm
For this type of installation, it is necessary to modify the P71 and P72
parameters in the electronic card as shown in the table (also see the
SERVICE instructions).
After changing the parameters, the boiler must be calibrated as
described in the SERVICE manual.
Model
Qmin - Pressure at the chimney 25 Pa
MPX 24 - MPX 20/24 MI
MPX 24/28 MI
MPX 28/33 MI

10.2 SEPARATE DUCTS

This type of installation makes it possible to discharge exhaust
fumes both outside the building and into single flue ducts.
Comburent air can be drawn in at a different location from that
of the flue terminal. The accessory splitting kit comprises a flue
duct adaptor (80) (B) and an air duct adaptor (A). For the air
duct adaptor, fit the screws and seals previously removed from
the cap.
The 90° bend is used to connect the boiler to the inlet and
outlet ducts, adapting them to various requirements. It can also
be used as a supplementary curve combined with a duct or a
45° bend.
• A 90° bend reduces the total duct length by 0.5 metres.
• A 45° bend reduces the total duct length by 0.25 metres.
• The first 90° bend is not included when calculating the maximum available length.

SINGLE SPLITTING KIT (ALTERNATIVE ACCESSORY)

For special installations of the fumes inlet/outlet ducts, the
single splitting kit (C), supplied as an accessory, can be used.
This accessory, in fact, can be used to move the inlet and outlet
in any direction. This type of installation makes it possible to
discharge exhaust fumes both outside the building and into
single flue ducts. Comburent air can be drawn in at a different
location from that of the flue terminal. The splitting kit is fixed
to the boiler turret (100/60 mm) and allows the comburent air
and outlet fumes to enter/leave the two separate ducts (80
mm). For further information, read the assembly instructions
supplied with the accessory.
SOME OUTLET DUCT INSTALLATION EXAMPLES AND THEIR RELATIVE MAXIMUM LENGTHS ARE SHOWN IN ANNEX
"SECTION" D AT THE END OF THIS MANUAL.
7679775.01 (1-04/17)
P72
Qmax - Pressure at the chimney 86 Pa
85
85
85
10
P71
130
185
180
A B