The scheme represents a typical system configuration for apartments in condominium contexts or in small single-family private homes. In this case, the system is powered by an instantaneous production wall boiler, centrally located with respect to the points of use, without accumulation of domestic hot water (DHW).

The production of hot water takes place instantly at the time of the request, without intermediate accumulation.
 The DHW temperature is regulated directly by the boiler, which manages the ignition and modulation of the burner according to the flow rate taken and the set temperature.

The distribution of domestic hot water (DHW) and domestic cold water (DHW) is manifold type.
 There are two main manifolds (one for each area of the house), to which the pipes that reach the individual sanitary terminals (washbasins, shower, toilet, appliances) are connected in derivation.

This scheme allows:

●      An independent adjustment of the various points of use

●      A balanced pressure distribution

●      Easier maintenance thanks to the presence of shut-off valves on the manifolds
 

There is no hot water recirculation circuit. This choice is motivated by two main factors:

●      Standard instant wall boilers are not designed to handle a recirculation

●      The contained volumes of the system make the insertion of such a system inefficient and unjustified

As a result, the waiting times for the supply of DHW to the terminals may vary depending on the distance of the points of use from the boiler.

Operating specifications

●      Absence of programmed thermal disinfection, as it is not expected in plants with instant production and domestic use

●      Frequent and regular use of the appliances, a condition that contributes to the maintenance of water quality inside the pipes

●      Supplementary accessories: devices for pressure/flow regulation and control (e.g. codes 535 and 577) installed on the input AFS circuit are represente.