Ariston 3700712 Handbuch für Montage und Betrieb - Seite 36

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In the case of walls made of bricks or perforated blocks, partition walls featuring limited static, or ma-

sonry different in some way from those stated, you first need to carry out a preliminary static check of

the supporting system. The wall-mounting fastening hooks must be designed to support a weight that is

three times higher than the weight of the water heater filled with water.

Fastening hooks with a diameter of at least 12 mm are recommended (Fig. 3)

We recommend installing the appliance (Fig. 1, Rif.A) as close as possible to the delivery points to

minimise heat loss along the pipes. Local regulations may provide for restrictions on installation in bath-

rooms; observe any regulatory minimum distances. To facilitate maintenance, make sure there is a clear-

ance of at least 50 cm inside the enclosure for access to the electrical equipment.

Multi-position installation

The product may be installed either vertically or horizontally (Fig. 2). To install it horizontally, rotate it

clockwise so that the water pipes are at the left (cold water pipe at the bottom). Any other installation

than that shown in (Fig. 2) is improper and prohibited.

HYDRAULIC CONNECTION

Connect the water heater's inlet and outlet with pipes or fittings that are able to withstand temperature in

excees of 90°C at a pressure exceeding that of the working pressure. Therefore, we advise against the

use of any materials which cannot resist such high temperatures.

The appliance must not be supplied with water of hardness less than 12°F, or 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.

Screw a "T" piece union to the water inlet pipe with the blue collar. On one side of the "T" piece union,

screw a tap for draining the appliance that can only be opened with the use of a tool (Fig. 2, Rif.B).

On the other side of the "T" piece union screw the safety valve supplied (Fig. 2, Rif.A).

Safety group complies with the European standard EN 1487

Some countries may require the use of hydraulic special safety devices; the installer must check the

suitability of the safety device he tends to use.

Do not install any shut-off device (valve, cock, etc.) between the safety unit and the heater itself.

The appliance's drain outlet must be connected to a drain pipe of diameter at least equal to the of the

outlet itself, with a funnel to permit an air gap of at least 20 mm for visual inspection. Use a hose to con-

nect the safety group to the mains cold water supply; fit a cock if necessary (Fig.2, Rif.D).

In addition, a water discharge tube on the outlet (Fig.2, Rif.C) is necessary if the emptying tap is opened.

When installing the safety device, do not tighten it fully down, and do not tamper with its settings.

It is necessary to connect the drain, which must always be left exposed to the atmosphere, with a drain-

age pipe that is installed sloping downwards in a place with no ice. If the network pressure is closed

to the calibrated valve pressure, it will be necessary to apply a pressure reducer far away from the

appliance. To avoid any possible damage to the mixer units (taps or shower) it is necessary to drain any

impurities from the pipes

36 / EN