Ariston M 3323U-PV1 User Manual

Fig. 1

DESCRIPTION OF THE UNIT

BRAVO M_U-PV1

1 Water Inlet 2 Water Outlet 3 Power Indicator Light for Heating Element(s)

For the technical specifications, refer to the rating plate.

Power kW

Voltage V

Current A

Delivery Pressure Minimum kPa

Frequency Hz

Operating Range Minimum l/min

Weight (kg) kg

Dimensions: height x depth x width mm

1 bar = 10 N/cm

TECHNICAL SPECIFICATIONS

Maximum l/min

= 100 kPa = 14.5 psi

4 Filter 5 External Valve

3 / 3.3 / 3.6

220 / 230 / 240

13.7 / 14.4 / 15

10 kPa / 1.45 psi / 0.1 bar

50 - 60

3.1

340 x 101 x 225

4.1 / 4.5 / 4.9

220 / 230 / 240

18.7 / 20 / 20.4

National standards and codes may include restrictions on installing appliances in bathrooms. Installation

is the responsibility of the purchaser. The Merloni TermoSanitari S.p.a. company will not be held liable

for damages caused by incorrect installation and/or the failure to comply with the instructions contained in

this manual. In particular:

• The electrical connection must comply with the specifications set forth in the relative paragraph.

• The unit must be installed by a qualified technician.

The installation of the unit must comply with national codes, standards, and regulations currently in effect.

• Remove the cover, which is fastened at the bottom with screw.

• When remounting the knobs, pay attention to the position of the knobs. The applicance must be

installed on the wall, using the screws (A) and the wall anchors (B) provided with the unit.

GENERAL NOTICES

INSTALLATION

Fig. 2

Rating Plate

Water Connection

• Connect the inlet pipe for the appliance (C - blue) to cold water pipe from the mains, using a flexible

1/2" hose.

• If the static pressure in the mains is greater than 500 kPa (5 bar), mount a pressure reduction valve.

• The appliance drains freely and, therefore, the outlet pipe (D) must always remain open. Clogging

could seriously damage the water heater.

• The appliance is built to operate exclusively with the hand shower provided.

• When making the connection, do not tighten the connectors excessively. Use rubber gasket provided,

do not use seal tape on the thread.

Manual Bravo M 3323 U-PV1.xls

Fig. 3

Pressure Relief Valv

• The part labeled J shown in Fig. 4 is equipped with a pressure relief device.

• When the water pressure is excessively high, the pressure relief device will operate and the water

will drain out.

• The water heater is an open-outlet appliance. The activation of pressure relief device implies that there

are possible existence of clogging inside the water heater or installation mistakes that needs

maintenance immediately.

Electrical Connection

Make sure that the data on the rating plate complies with values for the electrical mains.

Install a bipolar switch between the appliances and the electrical mains. This switch should have a minimum contact break of 3 mm and meet the specifications provided in the following table.

Water Heater Model Switch Specifications

3 / 3.3 / 3.6kW - 220 / 230 / 240V

4.1 / 4.5 / 4.9kW - 220 / 230 / 240V

• Insert the power supply cable through the wire feed through (E) and cable clamp (F) following

through cable way (H).

• Make the electrical connection to the terminal block (G), as follows:

- Active voltage to terminal L;

- Neutral to terminal N;

- Earth (yellow-green) to terminal marked with symbol .

• Caution! Tighten the terminals for the connections well!

• Models up to 3.3kW

Use flexible wires with a cross section of 1.5mm2 with PVC sheathing (type H05 VV-F)

• Models over to 3.3kW

Use flexible wires with a cross section of 4mm2 with Polychloroprene sheathing (type H07 RN-F) maximum external diameter 16mm.

• Once the connections have been made, tighten the cable clamp (F), making sure that it is in position shown in detail in Fig. 4.

Notice: The appliance must be earthed.

The connection between the water heater and the switch must be made without any break, other

intervening contacts and with a cable that is resistant to humidity. The internal electrical connection must

correspond exactly to the wiring diagram located on the back part of the cover. Inverting the positions of

the wires may seriously damage the unit.

15A - 220 / 230 / 240V

21A - 220 / 230 / 240V

• Before doing any maintenance, disconnect the unit from the electrical mains by means of the bipolar

switch installed between the unit and te mains themselves.

• The hand shower must be cleaned on a periodic basis in order to prevent scale buildup (Fig. 5)

• Periodically clean the filter inside the valve shown in Fig. 1 (no. 4) for the water supply inlet

to prevent scale buildup; especially when you see the water flowrate decreased.

MAINTENANCE

Fig. 5

1 SPRAY HAND SHOWER

Wiring Diagram

Fig. 4

Over 3.3kW

Pressure

Relief Valve

Up to 3.3kW

Water

NB: Before connecting the appliance to the electrical mains, make sure that there are no leaks

in the water lines.

• Before providing power to the unit, wash the pipes and fill the unit.

• Replace the cover and turn the general power switch ON.

The water heater is now ready for use.

The temperature can be adjusted by varying the water flow. To do so, use the valves labeled 5.

WARNING! The water heater must never be turned on if the possibility exists that the water

contained within it is frozen.

NB: Water pressure variations in the mains that cause changes to the flow may cause variations in

the temperature of the hot water delivered.

STARTING THE UNIT FOR THE 1ST TIME

USE