Bedienungsanleitung Remeha Flexistor (Seite 12 von 36) (Englisch)

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Limitations

• The Remeha Flexistor 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 e󰀨ective

thermostatic 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 ltration 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).

Water supply

Bear in mind that the mains water supply to the property will be supplying both the hot and cold

water requirements simultaneously. It is recommended that the maximum water demand be

assessed and the water supply checked to ensure this demand can be met. A minimum ow rate

of 100l/min is required for the Remeha Flexistor range of cylinders

NOTE: A high mains water pressure will not always guarantee high ow rates.

Wherever possible the main supply pipe should be in 2”. The minimum mains water supply

requirements should be 0.15 MPa (1.5 bar) working pressure and minimum 100 litres per minute

ow rate. At these values outlet ow rates may be poor if several outlets are used simultaneously,

the higher the available pressure and ow rate the better the system performance will be.

The water supply must be of wholesome water quality (Fluid Category 1 as dened by the Water

Supply Regulations 1999). The Remeha Flexistor is to be used for the storage of wholesome

water (max. 250mg/l chloride).

Note: In hard water areas it is recommended that service intervals are reduced to monitor

scale build up on the immersion heaters.

Water container:

Duplex stainless steel. 100% pressure tested to 2.25 MPa (22.5 bar).

IMPORTANT INSTALLATION NOTE:

WHERE THE INLET SUPPLY TO THE PRESSURE REDUCING VALVE (PRV) IS ROUTED THROUGH

A HEATED SPACE AND IS FITTED WITH A CHECK VALVE OR OTHER FITTING THAT WOULD

PREVENT BACK FLOW, HIGH PRESSURES CAN BE EXPERIENCED IN THE INLET PIPE DUE TO

WARMING THAT CAN CAUSE DAMAGE TO THE PRV OR OTHER FITTINGS ON THE INLET

SUPPLY.

IN THESE CIRCUMSTANCES, THE INSTALLATION OF A MEANS TO ACCOMMODATE

EXPANSION AND THUS LIMIT THE PRESSURE RISE IN THE INLET PIPE IS RECOMMENDED.

REFER TO THE INSTALLATION SECTION FOR FURTHER DETAILS.

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