27
Grant Vortex Oil Boilers
A 22 mm push-fit plastic plumbing connector is
supplied with the boiler to connect the plastic pipe to
the stainless steel condensate outlet pipe - on the left
hand side of the boiler.
Use 22 mm plastic plumbing pipe between the boiler
and the inlet of the trap. Either 22 mm plastic
plumbing pipe or 19 mm (¾") overflow pipe can be
used from the outlet of the trap.
Note: Due to the wall thickness of plastic plumbing
pipe, it may be necessary to chamfer the internal edge
of the pipe before fitting it onto the spigot in the outlet
of the trap.
If connecting the condensate discharge internally - into
a waste system or soil stack - the bung must be fitted in
the overflow outlet of the trap.
On external discharge systems to a gully or soakaway,
the bung should be removed from the overflow outlet.
If connected to an external soil stack, the bung must be
fitted on the trap.
If there is any discharge of condensate from the
overflow outlet, this could indicate a blockage
(possibly due to freezing). Turn off the boiler and
contact your service engineer.
Care should be taken when siting the trap such that the
overflow outlet is readily visible and that any
condensate overflowing from the outlet cannot cause
either a hazard to persons or damage to surrounding
property or equipment.
Fig. 18 - Purpose made condensate soakaway
4 - GENERAL BOILER INFORMATION
IMPORTANT: The trap MUST be checked at regular
intervals (e.g. on every annual service) and cleaned as
necessary to ensure that it is clear and able to operate.
It is recommended that, if there is access to the left
hand side of the boiler, the condensate pipe be
connected to the boiler using a 'tee-piece' and cap to
form a 'rodding eye' - to allow cleaning inside the back
of the condensing heat exchanger via the boiler
condensate outlet.
In the case of the 15/26 Kitchen and Utility models
only, the condensate pipe can be routed through the
back of the boiler, to the right hand side. See Fig. 12a.
Condensate soakaway
To keep external pipework to a minimum, locate the
soakaway as close as possible to the boiler whilst
ensuring it is located clear of building foundations and
other services, e.g. gas, electricity, etc.
The soakaway should be located at least 500 mm from
any adjacent building.
Ensure that the drainage holes in the soakaway tube
face away from the building.
Only use a soakaway where the soil is porous and
drains easily. Do not use in clay soils or where the
soil is poorly drained.
Backfill the hole around the soakaway tube with 10 mm
limestone chippings.
Ground level
32 mm waste pipe external to the building
2.5 fall
O
25 mm
300 mm
400 mm
min.
Two rows of 3 x 12 mm
holes at 25 mm centres
and 50 mm from the bottom
of the tube. Holes facing
away from the property.
Cement seal
100 mm
plastic
tube
Sealed
end
Backfill with 10 mm
limestone chippings
