Figure 2: Water Connection & Overflow/Vent Connection
For rear entry connection on 3-10 Litre models, we recommend that you use a
braided flexible hose with a 90 elbow for ease of connection.
An isolating valve should be installed in the system to enable water to the unit to be
turned off in the event of any fault.
OVERFLOW / VENT CONNECTION IMPORTANCE
Connect a 15 mm (½”) pipe to the overflow/vent connection (½”BSP nipple). This
pipe is to be made of a material such that continuous steam will not degrade it (eg
copper). This pipe must have a continuous fall, not exceeding 3 metres in length
and / or contain no more than 4 bends (refer to figure 2).
The drain pipe work must not exert a pressure of more than 1 metre of head on the
boiling unit (refer to figure 2).
If the site situation requires a pipe length exceeding 3 metres, or a discharge head
(vertical distance between vent outlet and inlet) greater than 1 meter, then
discharge the overflow/vent into a tundish.
During normal operation of the unit, the overflow/vent connection may discharge
small quantities of steam and condensate, so it is ESSENTIAL that the drain pipe is
attached to the overflow vent connection. This drain pipe must discharge to waste
at a point where no scald injury, nuisance nor inconvenience is caused to people in
the immediate vicinity.
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