Part 4 - General venting
Concentric installation
These instructions must be followed together with the instructions in the manual that is supplied with the roof or
wall terminal. That manual gives special instructions for applications, pressure drops, maintenance and mounting of
the complete vent system. Before installing the Concentric Vent & Air System, read and follow the instructions of
the manual that is supplied with the terminal
Caution
Do not use grease or other lubricant on the vent seals. Only water may be used for this purpose.
Grease or other lubricant can make the seal brittle or it can result in tears in the surface of the seal, this will result
in flue gas leakage.
Installation:
1.
Start at the appliance flue connector, install the system with the female ends (with the integral seal) pointing
away from the appliance. Fasten the flue gas system as soon as possible to the wall so that a tight connection of
the flue gas system to the boiler is guaranteed and that it will be impossible to get clearances between the flue gas
system and the boiler due to any unexpected cause.
2.
Check that the seal is retained correctly in the groove section as described in 6b.
3.
Take precautions with horizontal installation, the slope must be at least 5 cm/mtr (0.60 inch/feet) towards
the boiler.
4.
Shortening this type of concentric is not allowed, use when necessary a telescopic or special Cut-able
Concentric Vent & air section, these sections are telescopic over a length of 330 till 400 mm (13 till 17.3 inch).
5.
First, mount the brackets on a fixed part of the building. (i.e. wall).
6.
Brackets must be fixed as follows, see figure 4.2:
6a.
Straight vent sections that are installed vertical must be supported with brackets every 6 feet (2 m) or less,
see
figure 4.2, dimension B.
6b.
Straight vent sections installed with a slope must be supported with at least one bracket per section, this
brackets must be installed at a maximum distance of 15 cm (6 inch) from the female end, see figure 4.2,
dimension A.
6c.
Bends and T pieces are sufficiently supported when a bracket is fixed at the female end of the
connected
straight.
Figure 4.2 Bracket supporting
7.
Mount the vent elements in the brackets.
8.
It is recommended to rotate the joints slightly when assembling them. Only use water for easier assembling.
9.
Take care that the load of the flue system is not supported on the appliance.
10.
The outer vents must be secured with the 2 provided self-tapping screws. See figure 4.3. Use a low
torque setting to drill the screws into the vent system.
11.
Fix the clamp around the flue.
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