BS EN 12098-5-2017 pdf free download.Energy Performance of Buildings – Controls for heating systems Part 5: Start-stop schedulers for heating systems – Modules M3-5,6,7,8
This European Standard applies to scheduling equipment for heating systems. The signals can be processed by using either analogue or digital techniques, or both.
It applies to start-stop scheduling functions and sets minimum acceptable standards for functions,performance and documentation.
NOTE 1 The start-stop function can be integrated within a main control device. In this case, the controller would be expected to this standard for scheduling function.
Safety requirements on heating systems and heating control systems remain unaffected by this European Standard. The actuators and the dynamic behaviour of the valves are not covered in this European Standard. This control equipment may or may not be connected to a data network.
Table 1 shows the relative position of this standard within the set of EPB standards in the context of the modular structure as set out in EN ISO 52000-1.
NOTE 2 In CEN ISO/TR 52000-2 the same table can be found, with, for each module, the numbers of the relevant EPB standards and accompanying technical reports that are published or in preparation.
NOTE 3 The modules represent EPB standards, although one EPB standard may cover more than one module and one module may be covered by more than one EPB standard, for instance a simplified and a detailed method respectively.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN ISO 52000-1:2017, Energy performance of buildings – Overarching EPB assessment – Part 1: General framework and procedures (ISO 52000-1:2017)
EN 60038, CENELEC standard voltages (IEC 60038)
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)
EN 60730-series, Automatic electrical controls for household and similar use (IEC 60730-1)
EN ISO 7345:1995, Thermal insulation – Physical quantities and definitions (ISO 7345:1987)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 7345:1995, in EN ISO 52000-1:2017 and the following apply.
3.1 start-stop scheduler
device which switches heating modes affecting the heating control system according to a program
Note 1 to entry: See Figure 1.
3.2 start-stop timer start-stop scheduler switching heating modes for a single programmed period, started manually or by external signal Note 1 to entry: See Figure 2.
3.3 switch time point in time at which the scheduler switches from a mode to another one
3.4 mode state of a device or system defining the manner by which it performs its functions
Note 1 to entry: A heating system or a heating controller should have many heating modes (or heating operation modes), e.g. comfort, pre-comfort, eco mode, economy on, off, start, protection. It should be noted that other modes can also exist.
Note 2 to entry: Heating protection mode: in this mode, heating system is switched off and, if it applies, enable frost protection function. It’s important to make a difference between the heating protection mode and a so-called device protection mode for mains powered equipment and house hold appliances. It concerns devices itself for non-operational, lowest power consumption mode which cannot be switched off (influenced) by the user and that may persist for an indefinite time.
3.5 output signal
signal generated by the scheduler to the control system for switch heating mode
Note 1 to entry: This signal can affect the controller or the actuating equipment or modify the room temperature controller set point.
3.6 program
memorised switch times, reproducing periods or periodic cycles, daily, weekly or yearly
Note 1 to entry: Program may include periods for exception handling, start period or tariff compensation functions.
3.7 type of daily program
daily program able to be reproduced for many days of the week or the year
3.8 exception handling function
temporary override of the program
3.9 start period
operating period between switch-on heating time and the beginning of normal occupation period during which heating rises room temperature
Note 1 to entry: A start-stop optimiser controls the switch-on heating time modifying the start period in relation with measured variables (see EN 12098–1 and EN 12098–3). On a scheduler, start period set is a constant parameter, the switch-on time being fixed by start period and beginning of normal occupation period user settings.
3.10
tariff compensation
function anticipating the switch time, related to the programmed switch time and tariff rising time Note 1 to entry: This function make benefits, according to cost reflective message from electric utility (see EN 12098–3).
3.11 manual operation
mode of operation during which the mode of the scheduler is directly changed by the operator
3.12 clock retention time
duration which allows to recover the actual time after a power failure.BS EN 12098-5 pdf download.