Heatrae Sadia MEGAflo Installation Manual page 6

2.5 LIMITATIONS
The Megaflo unvented water heater should not be used in any of the following instances:
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Solid fuel boilers or any other boiler in which the energy input is not under effective ther
mostatic control unless additional and appropriate safety measures are installed.
Gravity circulation primaries.
Steam heating plant unless additional and appropriate safety devices are installed.
Ascending spray type bidets or any other Class 5 back syphonage risk requiring that a
Type AA, AB, AD or AG air gap be employed.
Water supplies that have either inadequate pressure or where the supply may be
intermittent.
Situations where it is not possible to safely pipe away any discharge from the safety
valves.
Areas where the water consistently contains a high proportion of solids, eg. suspended
matter that could block the strainer, unless adequate filtration can be ensured.
The installation must be carried out in accordance with the relevant requirements of:
The appropriate Building Regulations: either The Building Regulations (England), The
Building Regulations (Scotland) or Building Regulations (Northern Ireland).
The Water Fittings Regulations (England and Wales) or Water Byelaws (Scotland).