4.1.1 Defining The Auxiliary System - Junkers 7 736 503 876 Mode D'emploi

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Table Des Matières

Table des Matières

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Programming

The solar heat output available is directly linked to the

temperature difference between the internal indirect coil and

the water in the cylinder. The higher the temperature of the

internal indirect coil in relation to the water in the cylinder, the

more solar thermal heating output there is available. On the

other hand, the greater the heat output available, the shorter

the heating time.

In this way, the "delt" parameter allows us to define the

minimum available performance range, below which the user

considers that the heating times are no longer acceptable and

therefore the heat pump refrigeration cycle has to be used in

conjunction with the solar auxiliary system.

Higher "delt" values mean that the heat pump will be activated

more regularly in order to guarantee a better available

performance and, as a result, faster water heating. Lower "delt"

values mean that the heat pump will only start working when

there is almost no available solar energy, and thereby

guarantee better economy, however this could cause longer

heating times.

If the temperature of the internal indirect coil is lower than the

temperature of the water in the cylinder, this means that there

is no available solar energy.

The "Tmin" parameter allows us to define the temperature of

the water in the cylinder below which the appliance will start

working (refrigeration cycle or auxiliary electric heater,

depending on the conditions and the parameter setting)

independently of the available solar thermal heating output

(defined via the "Tmin" parameter). In other words, the "Tmin"

parameter defines the temperature of the water below which

the user will choose to prioritise comfort and reduced heating

time over the economy obtained by using the solar auxiliary

system. When there is solar thermal heating output available,

the water will be heated by the solar thermal system in

conjunction with the refrigeration cycle or the auxiliary electric

heater.

Auxiliary system: boiler "Boil"

When the boiler is activated as the "boil" auxiliary system,

whenever it is necessary to use the auxiliary electric heater the

system activates the boiler, provided there is available heat

output.

Similarly to the solar auxiliary system, the "delt" parameter

allows us to define the minimum available performance range

below which the user considers that the heating times are no

longer acceptable and therefore the auxiliary electric heater

must be used in conjunction with the boiler.

Higher "delt" values mean that the auxiliary electric heater will

be activated more regularly in order to guarantee a better

available performance and, as a result, faster water heating.

Lower "delt" values mean that the auxiliary electric heater will

only start working when the boiler has almost no available heat

output, which could cause longer heating times.

Also similarly to the solar auxiliary system, when the boiler is

the chosen auxiliary system, the "Tmin" parameter defines the

temperature of the water in the cylinder below which the

appliance will start working (refrigeration cycle or auxiliary

electric heater, depending on the conditions and the

parameter setting) independently of the available boiler heat

output (defined via the "Tmin" parameter"). Once the boiler

has replaced the auxiliary electric heater, the Tmin will only

have a practical effect when there are conditions for electric

heater operation (for example: "Elec" mode, water

temperature above 60°C, etc.). In these situations, when the

water temperature goes below the "Tmin", and provided there

is available heat output from the boiler, the electric heater

works in conjunction with the boiler.