13
8.4
MULTIPLE FLUE INSTALLATION
•
Common flues may be used on multiple installations only if all the heaters are of the same burner
system and fuel type and should be sized to ensure complete evacuation of the flue products from the
installation.
•
Where one appliance is to be used more regularly or for longer periods than the others in the group, it
should be connected at the point nearest the main flue. Please refer to BS6644 for further information
and recommendations.
•
A split collar should be fitted above the draught diverter so that the flue is secure but can be
disconnected for servicing. The weight of the flue must be adequately supported by securing clips and
not by the heater.
•
If a 600mm vertical rise before connection to the common header is not possible, the common header
should be sized to ensure adequate evacuation of all products of combustion.
8.5
FAN DILUTION SYSTEMS
An alternative to a natural draught flue system is a Flue dilution system, which is suitable for connection to the Mini
Copper-Fin’s but must be properly designed by a specialist flue company.
8.6
BALANCED COMPARTMENTS
The equipment is suitable for siting within a balanced compartment. This compartment must be designed by a
specialist company.
9.0
AIR SUPPLY
The following information is based on single appliance installations only. If more than one appliance is being
used, BS5440-2 or BS6644 (as appropriate) should be consulted to calculate the necessary requirements.
This is a Type B
11
appliance and must be installed outside or in a room separated from inhabited rooms
with suitable ventilation directly to the outside.
9.1
NATURAL VENTILATION
The combustion air requirements are as follows:
Model
Gross
Input
(kW)
Net
Input
(kW)
Ventilation
(Room)
(cm
2
)
Compartment
Compartment
(Direct to Outside)
(To Internal Space)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
MC91CE
23.8
26.4
106
132
264
264
528
MC136CE
35.6
39.6
160
199
396
396
792
MC181CE
47.0
52.8
212
264
528
528
1056
MC226CE
59.4
65.9
264
330
659
659
1318
TABLE 9.1
COMBUSTION VENTILATION REQUIREMENTS MC91CE – MC226CE
