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Condensate Collector
90° Male - Male
Elbow
Flue Duct Adaptor
Air Duct Adaptor
Fig. 12
Fig. 13
10mm/metre run min fall
Air Break
Pipe from Collector
Air Gap
110mm Soil
Pipe or Drain
Fig. 14
To Boiler
30mm Min
Loop
Air Break
Strap-on Boss
10mm/metre run min fall
7.0 Site Requirements
7.9
Flue Connections
1. The flue duct adaptor, air duct adaptor, 90°
male - male elbow and condensate collector are
supplied in a separate pack (Fig. 12). Also in the
pack are two terminals and fixing screws for use
with separate termination installations (see
Section 7.13, Fig. 15).
2. The remainder of the flue system must be
purchased separately according to the
requirements of the installation and type of
termination (see Section 7.12)
7.10
Terminal Guard (Fig. 13)
1. When codes of practice dictate the use of
terminal guards, they can be obtained from most
Plumbers' and Builders' Merchants.
2. There must be a clearance of at least 50mm
between any part of the terminal and the guard.
3. When ordering a terminal guard, quote the
appliance model number.
4. The flue terminal guard should be positioned
centrally over the terminal and fixed as
illustrated.
7.11
Condensate Drain (Fig. 14)
1. It is necessary to incorporate the condensate
trap elbow in the flue duct of all installations.
2. The outlet on the condensate collector is
intended to accept a 12mm ID PVC pipe. Where
possible this should discharge into the household
drainage system, preferably terminating
internally. If this is not practical, discharge into an
outside gulley or soak away is acceptable. To
prevent blockage of the condensate pipe due to
freezing it should be routed internally as far as
possible.
3. The pipe should have a fall over its' entire
length of at least 10mm/metre run to ensure
effective disposal of condensate. It must also
include a trap in its' length to prevent leakage of
combustion products.
4. If the condensate drain is connected to the
drainage system within the dwelling a further trap
must be included downstream of the air break.
5. Further information on condensate discharge
is given in the British Gas document "Guidance
Notes For The Installation Of Domestic Gas
Condensing Boilers".
15
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