4.3.4. Heaters selection data<br>

### 4.3.4. Heaters selection data

In position „Heaters selection data” the User can switch on the option of heaters selection in heated compartments clicking the field „Switch on the heaters selection”. You can find here also the button “Catalogue service” , which enables selection of required heaters catalogues. After clicking a selected button, the User can select them from a tab “Heaters”.

Heaters selection is of preliminary character, that means cooling of water in pipe-runs are taking into consideration approximately by increasing of heater size by an addition depending on number of storeys in a building and on current storey. For this reason heaters selected by means of Instal-heat&energy program can vary from heaters which have been selected by means of Instal-therm program. For that it is recommended to perform exact calculations of heating system in Instal-therm program.

Other factors which influence the thermal power of heaters such as: heater location in compartment, heater shielding, application of thermostatic valve and method of its connection to the installation are also taken into account by means of adequate multipliers. These multipliers are defined automatically on the basis of declared features of heaters determined by means of appropriate buttons – „Heater data” and „Limitation of heater dimensions”.

In successive fields the User will select a default type of heater and can make the correction of pre-defined data such as: supply temperature of heater, cooling down of heating agent in heater and addition for thermostat and number of storey, on which the heat source is located.

Clicking the window „Insulated pipes” the User declares insulation application on central heating system pipes. In such case the reduction of addition value taking into consideration cooling down of water in pipe-runs by the half in comparison with non-insulated pipes will take place.

! The User can declare in „Heaters selection data” parameters of a heater, which can be then used as a “default” type in heated compartments.

Window edition fields „Heaters selection data”:

Switch on the heaters selection

Selecting this field enables selection of heaters in heated compartments.

Default type of heater

Selection field of default type of heater, which can be used in project. Selected from declared catalogues of heaters.

Insulated pipes

Selecting this field will cause declaring of insulation on central heating system pipes, so that an addition taking into account influence of cooling down of water in pipe-runs is 50% smaller.

Available only on store

Because individual heaters sizes can have various availability status saved in catalogue – available in store or on request, it is necessary to select in selection options the availability status to be taken into account. Selecting of this field will cause declaring of heater selection among heaters which are available in basic range – on store.

qs –temperature on heaters supply [0C]

A field completed by the program with an default value. The User can declare other heaters supply temperature.

Dt/Δq –cooling down on heater[K]

Program will automatically complete this field with an default value 20 K. Value of cooling down on heater is a difference between temperature on supply and return of heating agent. The User can also declare its other value

bt – Addition to the heater’s size

This field takes into consideration increased heat losses resulting from divergences between data entered to the project and reality. Program will assign default value of multiplier equal to 15%. If divergences will not be taken into account, a value equal to 0 should be entered.

Noshs – Number of storey with source

This field takes into consideration special location of heat source in heating system in building. Selection of storey on which the source is located enables evaluation of cooling down in system.

! Field “Number of storey with source” declares presence of heat source on adequate storey in a building. It is important, that the number of storeys means its real number counted from the number 0. First inserted storey regardless of its type and entered name has always number 0. It is recommended to use the button when selecting the location of source in the building. It enables selecting of correct number of storey.

Additionally, using the key “Heater data” information concerning location of heaters, method of their connection to heating system and heaters shield data can be entered here.

The User can select in a pop-up window „Connection method” a configuration of connection of system to a heater, which will be suitable for a project. Red colour means supply of heater with heating agent, blue colour means return to the system.

Similarly, in field „Housing type” it is possible to select from a pop-up list a geometrical parameters of a housing and on the right side of list the User declares characteristic dimensions of selected housing.

Selecting the field „Location not under a window” the User determines location of heater as:

- at internal wall, away from external walls, balcony door and windows, or

- under the compartment ceiling.

Requirements concerning heaters dimensions such as height, length and depth should be determined by means of button “Limitation of heater dimensions”. The window gives possibility of heaters dimensions edition, determining simultaneously method of its selection.

- Heaters dimensions can be determined by means of option “Enforced”, which enables selection of heater according to enforced given dimension.

- Selection option “Smallest from range” enables the selection of heater, dimension of which will be selected as the smallest from determined range, specified by minimal “Min [mm]” and maximal “Max [mm]” dimension. If to all three dimensions this selection option will be declared, heaters will be selected according to following dimension priority: depth, height and length. It means, that the heater with smallest depth from the range will be selected, then the height will be considered and the length of heater at the end.

- Option “(Fit) to recess” enables fitting of heater to its recess by entering the heater recess and dimension for assembly, (resulting from difference between recess and heater dimensions). This option enables the selection of heater, dimensions of which are selected as best fit to recess dimension and is available for dimensions “Height” and “Length”. If both dimensions will be selected, priority has always the height and then the length. Depth can be declared as the smallest from the range or can be enforced

For defining of heater height following fields are available:

Enforced – selecting this field the User can define enforced height of heater in displayed field „Dimension (mm)”,

Smallest from range – enables declaring of minimal height dimension in field „Min. (mm)” and maximal in field „Max. (mm)” Pre-defined range of selection is enforced as default; this range can be edited.

To recess (fit) – enables defining of recess dimensions in field ”Fit to recess” and dimension for assembly in field „Min. for assembly”. The dimension for assembly is a difference between recess and heater height. This field is completed on the basis of value determined in storey edition window (see chapter 4.5.1).

For defining of heater length following fields are available:

Enforced – selecting this field the User can define enforced length of heater in displayed field „Dimension (mm)”,

Smallest from range – enables declaring of minimal length dimension in field „Min. (mm)” and maximal in field „Max. (mm)”. Pre-defined range of selection is enforced as default; this range can be edited.

To recess (fit) – enables defining of recess dimensions in field ”Fit to recess” and dimension for assembly in field „Min. for assembly”. The dimension for assembly is a difference between recess and heater height. This field is completed on the basis of value determined in storey edition window (see chapter 4.5.1).

For defining of heater depth following fields are available:

Enforced – selecting this field the User can enforce depth of heater in displayed field „Dimension (mm)”,

Smallest from range – enables selection on of smallest depth dimension in field „Min. (mm)” and maximal in field „Max. (mm)” Pre-defined range of selection is enforced as default; this range can be edited.