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General Requirements
2.5 LIMITATIONS
The Megaflo unvented water heater should not be used in any of the following instances:
•
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).
