Technical data

WATER SUPPLY
Bear in mind that the water supply to the property will be supplying both the hot and cold water requirements
simultaneously. It is recommended that the maximum water demand is assessed and the water supply checked to
ensure this demand can be satisfactorily met.
NOTE: A high water pressure will not always guarantee high ow rates.
Wherever possible the PremierPlus supply pipe should be 22mm. We suggest the minimum supply requirements
should be 1.5 bar pressure and 20 litres per minute ow-rate. However, 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.
The PremierPlus cylinder has an operating pressure of 3.5 bar which is controlled by the cold water combination valve
assembly. The cold water combination valve assembly can be connected to a maximum pressure of 16 bar.
The PremierPlus cylinder is to be used for the storage of wholesum water (max 250mg/l Chloride ).
OUTLET/TERMINAL FITTINGS (TAPS, ETC.)
The PremierPlus cylinder can be used with most types of terminal ttings. It is advantageous in many mixer showers
to have balanced hot and cold water supplies. In these instances a balanced cold water connection should be placed
between the Cold Water Combination Valve and the PremierPlus water heater (see Fig.6, page 11). Outlets situated
higher than the PremierPlus cylinder will give outlet pressures lower than that at the heater, a 10m height difference
will result in a 1 bar pressure reduction at the outlet. All ttings, pipe-work and connections must have a rated pressure
of at least 6 bar at 80°C.
LIMITATIONS
The PremierPlus cylinder should not be used in association with any of the following:
Solid fuel boilers or any other boiler in which the energy input is not under effective thermostatic control, unless •
additional and appropriate safety measures are installed.
Ascending spray type bidets or any other class 1 back syphonage risk require that a type A air gap be employed.•
Steam heating plants unless additional and appropriate safety devices are installed.•
Situations where maintenance is likely to be neglected or safety devices tampered with.•
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.•
In areas where the water consistently contains a high proportion of solids, e.g. suspended matter that could block •
the strainer unless adequate ltration can be ensured.
OPERATIONAL SUMMARY (Indirect models in conformance with BS EN 12897:2006)
Maximum mains water supply pressure (to 3 bar pressure reducing valve) 1.6MPa (16 bar)
Operating pressure (pressure reducing valve set pressure - non adjustable) 0.35MPa (3.5 bar)
Expansion vessel pressure 0.35MPa (3.5 bar)
Expansion relief valve setting 0.6MPa (6 bar)
T&P relief valve setting 1.0MPa/90 °C (10 bar)
Primary coil operating pressure (max) 1.0MPa (10 bar)
Immersion heater rating (a.c. supply only) 3kW @ 240V 50Hz
2.8kW @ 230V 50Hz
Primary Coil ratings See Table 2, page 7
(Based on a primary ow rate of 15L/min
and a ow temperature of 80 °C)
Pressure drop across coils 0.02MPa (0.2bar)
Storage capacity See Table 1, Page 3
Weight when full See Table 1, Page 3
Note: Although the primary coil pressure rating is 1.0Mpa (10 bar) the 2 port zone valve supplied with the
cylinder is only rated 0.86MPa (8.6 bar). If the cylinder is to be plumbed into a system delivering 1.0MPa (10
bar) a suitable 2 port zone valve will have to be sourced.
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