Technical data

14
Alpha InTec S - General Boiler Information
Fig. 9 - External soakaway
Fig. 8 - External gully
Open end of pipe
diverted into gully
below grid but above
water level
Use waterproof
pipework insulation
in very exposed
positions
Ensure pipe is
adequately
supported
Plastic pipe
Minimum gradient 2½°
Ground level (either/or)
22mm termination from boiler, increase to 32 mm if external
2½ fall
O
25mm
300mm
Two rows of 3 x 12mm
holes at 25mm centres,
50mm from the bottom
of the tube. Holes to face
away from house.
Cement mortar sealing
100mm plastic tube
Bottom of tube sealed
Soakaway depth 400mm
filled with limestone chippings
500 mm min.
If the external temperature drops below 2°C and the boiler is on, the relay PCB is operated and voltage is supplied to the
trace heating wire causing it to heat up and prevent the condensate from freezing. When the outside temperature rises to
4°C or the boiler pump stops, the trace heater is switched off. The connection of the outside weather probe supplied with this
kit also enables the weather compensation feature on the boiler.