Ariston PRO1 ECO 80V Manual - Halaman 8

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Do not fit any stop cocks or isolating valves within the distance required for expansion. If a pressure reducing valve is

needed, due to a mains pressure of over 3.5 bar, an expansion control kit must be fitted regardless of expansion pipe-

work installed. The expansion distances quoted are for 15mm pipes and can be approximately halved for 22mm pipes.

The appliance must not be supplied with water of hardness less than 12°F, not with especially hard water (greater than

25°F); we recommend installing a water softener, properly calibrated and controlled - do not allow the residual hardness

to fall below 15°F.

The appliance is covered under the Building Regulations and therefore it is not possible to accommodate the expansion

water within the system pipe work and consequently a set of expansion controls must be installed.

Note: The discharge from relief valves must be made in a safe and conspicuous manner.

Please note that in all cases the dielectric junctions must be connected to the heater before any other connec-

tion is made (these prevent an electrolytic reaction).

If the supplied Dieletric Junctions are not fitted this could void the warranty.

Only the use of copper pipe is recommended for connection to the heater. If any other material is used it must be

able to withstand 90°C at 7 bar pressure for long periods.

No valve must be fitted between the expansion/pressure relief valve and the water heater.

All other required safety components to install the appliance are supplied as a kit with the appliance:

15mm pressure reducing valve set at 3.5bar. Expansion vessel (charge pressure set at 3.5bar)"

DISCHARGE PIPE WORK NOTE:

The following guidelines refer to Building Regulation G3. It is good practice to follow these guidlines for all relief

valve discharge pipe work.

1) The tundish must be vertical and fitted within 600 mm of the temperature & pressure relief valve and must be lo-