BSI DD CEN/TS 12977-5:2010

This Technical Specification specifies performance test methods for control equipment. Furthermore this document contains requirements on accuracy, durability and reliability of control equipment.

The tests described in this document are limited to components delivered with or for the system by the final supplier. For the purposes of this document controller and control equipment for solar heating systems and auxiliary heaters, if part of the system, are restricted to:

1. controllers as:

   1. system clocks, timers and counters;

   2. differential thermostats;

   3. multi-function controllers;

2. sensors as:

   1. temperature sensors;

   2. irradiance sensors (for short wave radiation);

   3. pressure sensors;

   4. level sensors;

   5. flow meters; or

   6. heat meters;

3. actuators as:

   1. pumps;

   2. solenoid and motor valves; or

   3. relays.

   Furthermore combinations of controllers, sensors and actuators listed above.

   An additional objective of the procedures described in this document is to verify control algorithms and, together with the accuracy of sensors, to determine control parameters. In addition to verifying the functioning of a controller, its equipment and actuators, the determined parameters may be used for numerical system simulations.

   Typically electrical anodes are not part of the control equipment and are not controlled by the control equipment. However, because they are electrical appliances, electrical anodes are included in this document.

   This document is valid for control equipment of solar heating systems for the purpose of hot water preparation and/or space heating. If the solar system is connected to or part of a conventional heating system, the validity is extended to the entire system. In combination with the standards EN 12976-1, EN 12976-2 as well as CEN/TS 12977-1, CEN/TS 12977-2, EN 12977-3 and CEN/TS 12977-4 this document is valid for:

4. factory made solar heating systems;

5. small custom built solar heating systems;

6. large custom built solar heating systems; and

7. auxiliary heater equipment used in connection with d), e) and f).

NOTE Factory Made and Custom Built solar heating systems.

EN 12976-1, EN 12976-2 as well as CEN/TS 12977-1, CEN/TS 12977-2, EN 12977-3, and CEN/TS 12977-4 distinguish two categories of solar heating systems:

• Factory Made solar heating systems; and

• Custom Built solar heating systems.

As defined in CEN/TS 12977-1, the classification of a system as factory made or custom built is a choice of the final supplier.

Custom Built solar heating systems are subdivided into two categories:

• Small Custom Built systems offered by a company are described in a so-called assortment file, in which all components and possible system configurations, marketed by the company, are specified;

• Large Custom Built systems are uniquely designed for a specific situation.