Choosing A Location; Plumbing Connection And Preliminary Operations - Fondital WHPS BA SS Serie Manual De Instalación, Uso Y Mantenimiento

7.1.

Choosing a location

The place of installation must be protected from frost.
The water heater must be as close as possible to the heat generator. This is to avoid heat loss. If this is not possible, it is important to insulate the
connection pipes.
It must be positioned so as to allow laying of the DHW, the CH and solar collectors pipes.
7.2.

Plumbing connection and preliminary operations

The position and function of the couplings are shown in figs. 3, 4 and 7 and on the label attached to the back.
It is advisable to install the appliance as close as possible to the point where most water is used, in order to avoid heat loss along the pipes. It
should also be close to a drain for convenience when emptying it.
A safety valve must be installed in the cold water pipe upstream of the heat exchanger, calibrated at a maximum pressure of 6 or 10 bar depending
on the maximum working pressure of the water heater.
It must not be possible to shut off the pipe connecting the heat exchanger and the safety valve as this would damage the heat exchanger due to
overpressure.
Take care when installing the safety valve. Do not force or tamper with it. The safety valve has a rated setting of 8 bar. Slight dripping from the
safety valve is normal during heating, so it is advisable to connect it to a trapped drain.
If the mains pressure is close to the valve setting, install a suitable pressure reducer as far away from the water heater as possible (fig. 10).
fig. 10
If the system has a pressure reducer and/or a non-return valve, it is mandatory to install an expansion vessel the capacity of
which is not less than 5% of the rated capacity of each heating element.
Non-return valves must NOT be installed between the safety valve and the expansion vessel.
In general, in order to protect the appliance and the system, it is always advisable to install an expansion vessel as specified above.
Inflate the diaphragm chamber of the expansion vessel as instructed by the manufacturer.
Install a thermostat for the controlling of the water temperature with a maximum calibration of 80°C and regulate it at a temperature of about 60°C
in order to reduce the formation of scaling.
Before connecting the appliance to the mains, fill it with water as follows:
- turn on the cold water tap;
- turn on a hot water tap (e.g. bath, sink, etc.), bleed air from the system and wait for a constant flow of water from all the water taps;
- check all the plumbing connections for leaks.
When the local water is hard (>20 °F), it is advisable to install specific devices to prevent excessive scale build-up. Please note that some of them are
similar to non-return valves, which means that a suitable expansion vessel must be provided.
20
HOT WATER OUTLET
USCITA ACQUA CALDA
MANDATA CALDAIA
BOILER FLOW
RECIRCULATION
RICIRCOLO
VASO DI ESPANSIONE SANITARIO DHW EXPANSION VESSEL
THERMOSTAT
TERMOSTATO
SAFETY VALVE
VALVOLA DI SICUREZZA
BOILER
RITORNO
RETURN
CALDAIA
ENTRATA
COLD
ACQUA
WATER
INLET FREDDA
SCARICO RUBINETTO
DISCHARGE
PRESSURE REDUCER RIDUTTORE DI PRESSIONE
RETE ALIMENTAZIONE
COLD WATER SUPPLY
ACQUA FREDDA
RUBINETTO
TAP
TAP