27
Grant Vortex Eco Utility Oil Boilers
4 - GENERAL BOILER INFORMATION
When in condensing mode the Grant Vortex Eco
boilers produce condensate from the water vapour in
the flue gases. This condensate is slightly acidic with a
ph value of around 3 (similar to vinegar). Provision
must be made for the safe and effective disposal of this
condensate.
Condensate can be disposed of using one of the
following methods of connection:
Internal connection (preferred option)
• into an internal domestic waste system (from
kitchen sink, washing machine, etc.)
• directly into the soil stack
External connection
• into an external soil stack
• into an external drain or gulley
• into a rainwater hopper (that is part of a combined
system where sewer carries both rainwater and foul
water)
• purpose made soakaway
All condensate disposal pipes MUST be fitted with a
trap - whether they are connected internally or
externally to a domestic waste system/soil stack or run
externally to a gully, hopper or soakaway.
General requirements
5.1
Connections into a rainwater hopper, external drain or
gulley should be terminated inside the hopper/drain/
gulley below the grid level but above the water level.
Condensate disposal pipes should not be connected
directly into rainwater downpipes or to waste/soil
systems connected to septic tanks.
Condensate should not be discharged into 'grey water'
systems that re-use water used in the home (not
including water from toilets).
It should be noted that connection of a condensate pipe
to the drain may be subject to local Building Control
requirements.
Condensate disposal pipework must be plastic (plastic
waste or overflow pipe is suitable).
IMPORTANT: Copper or steel pipe is NOT suitable
and MUST NOT be used.
Condensate disposal pipes should have a minimum
'nominal' diameter of 22 mm (¾") - e.g. use 21.5 mm
OD polypropylene overflow pipe.
Condensate disposal pipes must be fitted with a fall
(away from the boiler) of at least 2.5° (~45 mm fall
per metre run).
Connections
5.2
Pipework
5.3
5 - CONDENSATE DISPOSAL
The system should incorporate a low-pressure switch
to shut off power to the boiler if the system pressure
drops below 0.2 bar. A suitable low pressure switch kit
is available to purchase from Grant Engineering (UK)
Limited, Part No. MPCBS 62.
Underfloor systems - Plastic pipe may be used on
Underfloor systems where the plastic pipe is fitted
after the thermostatic mixing valve. Copper tube must
be used for at least the first metre of flow and return
primary pipework between the boiler and the
underfloor mixing/blending valves.
To Next Page
Loading...
