page no. 38 of 68
LX Range Users, Installation & Servicing Instructions Doc Ref M110 issue 1.0 Dec 2020.
Extra lengths of standard flue can now be added between
the adjustable length and final flue connection. (not shown
on sketch below). Clamp with locking bands.
Prior to connection to the final piece of flue, place a locking
band onto the end of the flue pipe.
Clamp the flue locking band. (This locking band may be
very tight!, see section 2.2.3.1 for correct installation).
Heater
Horizontal Wall Terminal
Locking Band
Adjustable Length
c/w Locking Band
250mm Flue Length
Heater
Spigot
Typical Horizontal Single Flue
type B22 - exploded view
2.2.5. Condense Drain
We recommend installing a Powrmatic inline condense
flue drain when flued vertically, due to the lower flue gas
temperatures experienced when the heater is operating
at low firing rates. Other relevant factors include
installations where significant length of the flue is used
which may cause chilling, or if heater may be exposed to
high winds and heavy rain, which may ingress the flue.
Even if the drain point is capped, should the drain be
required in the future.
The trap and associated pipe work must be protected
from freezing. If drainage under gravity is not possible a
condensate pump should be used and installed following
the manufacturers instructions.
The condensate drainage pipe should be run in one of he
following materials PVC; PVC-U; ABS; PP or PVC-C and,
where necessary, have a fall of at least 2.5° in every 50m.
Any condense pipework must be adequate to prevent
sagging. A maximum spacing of 0.5m for horizontal and
1.0m for vertical sections should be adequate. Bends
should be kept to a minimum. Copper or copper based
alloy must not be used for condensate drains. See BS
6896; BS5440 and IGEM/UP/10.
Condensate may be piped and discharged to a number
of points within a building including:- internal stack pipe,
waste pipe, external drain or rainwater hopper provided
Once all flue components are correctly in place, lock the
adjustable length locking band back at the adjustable
length section.
NOTE: Refer to the following typical
breakdown sketch to aid with the above
procedures.
it is part of a combined system (i.e. sewer carries both
rainwater & foul water). Alternatively, the condensate
can be discharged into a purpose made soakaway. A
neutralizer must be used which is subject to a routine
replacement programme, in line with the manufacturers/
suppliers guidelines.
Where a drain point cannot be reached by gravity, a
suitable condensate pump can be considered. Pump
manufacturer's instructions must always be followed.
If the termination is to be to an external stack then in
addition to the requirements for connecting to an internal
stack, extra care is necessary in order to reduce the risk
of the drain becoming blocked due to the condensate
freezing. A length of pipe external to the building of not
less than 50mm diameter should be kept as short as
possible and not more than 3m. Any trap in the drainpipe
must be fitted within the building. In exposed locations
the pipe should be protected with waterproof pipe
insulation to prevent ice forming within the condensate
pipework.
Building regulations require a trap in the pipe whether it
is terminated directly to the outside or before it connects
to another waste pipe. If the drain pipe is taken directly to
a gully or rainwater hopper, a water seal of no less than
38mm is required. When connected to another waste pipe
the water seal must be at least 75mm, to prevent foul
smells entering the building.
2.2 Installation of Flue System/Combustion Air
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