andrews MAXXflo EVO Series Installation And Maintenance Manual page 30

4.7.8 ROOM SEALED FLUE (C
There are four approved room sealed arrangements where both the air inlet and fl ue discharge terminate out-
side the building.
Flue and air ducts are supplied to a concentric design and are 80/125mm fl ue size. See section 4.7.10 for
component choices. Flues should slope back to the Heater by three degrees.
Terminal positions must comply with the requirements detailed in section 4.7.13
Flue type C
Flue type C
tion products must not be installed on opposite walls of a building
Flue type C
Ensure the inner fl ue section is sealed at all joints, otherwise incomplete combustion may result. For ease of
assembly, it is recommended that a small quantity of petroleum jelly is used to lubricate each fl ue seal, before
fi tting fl ue sections together.
Any terminal must be fi tted with a guard if less than 2m above ground level or if it is in a position where it may
cause harm to persons as a result of touching a hot surface.
Care must be taken to avoid long horizontal runs of fl ue duct and continuous discharge of condensate from a
horizontal fl ue terminal - Ensure that the fl ue slopes back by 3
4.7.9 ROOM SEALED VENTILATION REQUIREMENTS
Where the heater is installed in a DEDICATED PLANT ROOM or COMPARTMENT no additional ventilation
should be required, provided the following ambient conditions are not exceeded:
Air humidity
Ambient temperature (1.5m from fl oor level)
Where the room sealed heater is installed in a boiler room with an air change rate >0.5 changes per hour, no
additional ventilation is required.
If the air change rate is less than 0.5 changes per hour, ventilation must be provided at low and high levels.
The minimum permanent free vent area is as follows:-
MAXXfl o EVO 30
MAXXfl o EVO 60
Installation
C
13, 33
& C - If separate terminal outlets are used, they shall fi t inside a square of 50cm
13 33
- Any terminal used for the separate supply of air and for the evacuation of combus-
53
- Any terminal used must comply with the requirements of BS EN 1856-1
63
Model Min free area of high & low vent
C & C ) SYSTEM
53 63
O towards the heater
93% RH @ 25
32
O
112cm
2
224cm 2
30
C
O
C
MAXXfl o EVO