19
DALIS
Digital electric unvented heat pump
Figure 11 - tundish and discharge pipe
8.11. Discharge pipe arrangement (D2)
WARNING
Discharge will consist of scalding water and steam. Asphalt, roofing felt and
non-metallic rainwater goods may be damaged by such discharges.
Please see figure 11 for diagram of discharge (D2) pipe arrangement. The discharge pipe from the
tundish should:
•
Terminate in a safe place, where there is no risk to persons in the vicinity of the discharge.
•
Be manufactured of metal or other material that is clearly demonstrated to be capable of safely
withstanding temperatures of the water discharged.
•
Be clearly and permanently labelled to identify the product and its performance standard.
•
Be at least one size larger than the normal outlet size of the safety device, unless its total
hydraulic resistance exceeds that of a straight pipe 9m long, i.e. discharge pipes between 9m
and 18m equivalent resistance length should be at least two sizes larger than the normal outlet
size of the safety device, between 18m and 27m and at least three sizes larger and so on.
•
Have a vertical section of pipe at least 300mm long below the tundish, before any elbows or
bends in the pipework and installed in a continuous fall.
•
Have discharges visible at both the tundish and the final point of discharge. Where this is not
possible or practical, here are some examples of acceptable discharge arrangements:
- Ideally below a fixed grating and above the water seal in a trapped gully.
Summary of Contents for Dalis 200DHW4
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