ANDREWS COMBIfl o
29
GB
4.12.1 OPEN FLUE (TYPE B
23
)
This is an open fl ued arrangement where the air for combustion is drawn from the room and because of this the
room must be ventilated. If the Heater is installed in a compartment then it will require both high and low level
vents. The fl ue products are discharged either horizontally or vertically using any of the supplied separate duct
components.
Ventilation openings may need to be increased if the following air temperatures are exceeded with an ambient
temperature of 15
O
C :-
Where the opened fl ued appliance is installed within a boiler room, this requires permanent vents for air supply
purposes, one at high level and one at low level, direct to outside air. The minimum free vent area required will
be as follows:-
For Natural Gas installations only, where high and low level ventilation is not practicable and the volume of
space is greater than 1m
3
per 2kW net input, it is permitted to install 6cm
2
per kW of total ventilation at high level
only, provided more than one ventilator is fi tted.
A compartment containing an open-fl ued appliance shall be labelled as follows:
IMPORTANT
:
Do not block the vents. Do not use the compartment for storage
.
CAUTION
There must be suffi cient clearance around the appliance to allow proper circulation of ventilation air.
The clearances required for servicing will normally be adequate. (see section 3.1 P7).
The Eff ect of any type of extract fan in the plant room must be considered and an additional air inlet
may be needed from outside to counter the eff ect of any such fans.
4.12.2 ROOM SEALED FLUE (TYPE C
13
C
33
C
53
)
There are three approved room sealed arrangements where both the air inlet and fl ue discharge terminate out-
side the building.
Type C
13
& C
33
Flue and air ducts terminate either horizontally or vertically in the same position
Flue and air ducts are supplied to a concentric design (130/200mm). See Fig 3.5 for component choices. Flues
should slope back to the Heater by three degrees. Terminal positions must comply with the requirements de-
tailed in section 4.12.2
4.12.3 VENTILATION REQUIREMENTS (TYPE C
13,
C
33
C
53
)
Where the room sealed appliance is installed in a boiler room with an air change rate >0.5 changes per hour,
then no additional ventilation is required.
If the air change rate is less than 0.5 changes per hour the following minimum free vent area will be as follows:-
Model
Position of
vent
<50% DHW & CH
Summer use
>50% to <75% DHW & CH
Summer use
>75% DHW & CH
Summer use
COMBifl o
100
High level
188cm
2
282cm
2
376cm
2
Low level
376cm
2
470cm
2
564cm
2
COMBIfl o
150
High level
280cm
2
420cm
2
560cm
2
Low level
560cm
2
700cm
2
840cm
2
Model
Position of vent
<50% Summer use
>50% and <75 Summer usage
>75% summer usage
COMBifl o 100
High & low level
188cm
2
282cm
2
375cm
2
COMBIfl o 150
High & low level
280cm
2
420cm
2
560cm
2
High level (100mm below ceiling level)
40
O
C
Mid level (1500mm from fl oor level)
32
O
C
Low level (100mm above fl oor level)
25
O
C
Summary of Contents for COMBIflo 100/300
Page 9: ...ANDREWS COMBIflo 7 GB 3 1 GENERAL DIMENSIONS CONNECTIONS 3 0 TECHNICAL DATA ...
Page 12: ...ANDREWS COMBIflo 10 GB 3 4 APPLICATION EXAMPLES Single Heating Circuit Simple ...
Page 13: ...ANDREWS COMBIflo 11 GB Single Heating Circuit Immersion DHW Circulation pump ...
Page 16: ...ANDREWS COMBIflo 14 GB Heating Circuit External 0 10V control ...
Page 17: ...ANDREWS COMBIflo 15 GB BMS INTERNET CONNECTIONS ...
Page 18: ...ANDREWS COMBIflo 16 GB 3 5 WIRING DIAGRAMS PCB 1 ...
Page 19: ...ANDREWS COMBIflo 17 GB PCB 2 3 ...
