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

7.

INSTALLATION

This appliance is designed to heat DHW to a temperature below boiling point at atmospheric pressure.
It must be connected to a heating system and a DHW distribution network that are compatible with its
performance and power specifi cations.
The following operations must only be carried out by professional qualifi ed personnel.
Failure to follow this rule will invalidate the warranty.
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 and CH pipes.
Four adjustable legs are provided. They can be screwed into the threaded openings underneath the appliance.
7.2.

Plumbing connections and preliminary operations

The position and function of the couplings are shown in fi gs. 2 and 4 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.
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.
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
specifi ed above.
Infl ate the diaphragm chamber of the expansion vessel as instructed by the manufacturer.
Before connecting the appliance to the mains, fi ll 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 fl ow 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 specifi c 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.
The appliance can have a recirculation pipe connected to it. If this is done, the pipe must be insulated.
For recirculation it is necessary to install a pump fi tted with a timer or a minimum contact thermostat to activate cooling of
the recirculation water. If the coupling is not used, a seal cap must be provided.
The inlet and outlet pipes must be connected at the established points of the heat exchanger.
- Check that the thermal output of the heat generator is at least 15% higher than the thermal output of the water heater
coil.
- If there are any impurities in the mains water, provide a suitable fi lter and check that the circulation pumps have a
suffi cient fl ow rate and pressure head and work effi ciently.
- Make sure the thermostat and thermometer probes are positioned correctly.
- Check that the thermostat controls operate correctly.
The plumbing system must be connected as shown in fi g. 2 and 4.
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