ST-281 for STALMARK boilers

The use of the ST-281 room regulator ensures convenient control and monitoring of room temperature, boiler, hot water tank and mixing valves directly from the apartment without the need to go down to the boiler room. The controller is adapted to work with various types of main controllers equipped with RS communication: standard controllers, pellet controllers (equipped with an igniter) and installation controllers.

Operating principle

The room regulator sends a signal to the main controller about overheating or underheating of the room. Depending on the detailed settings, the signal about overheating of the room can, for example: turn off the C.O. pump, lower the boiler set temperature by the specified amount (settings in the main controller). The room regulator also allows you to change some settings of the main controller, such as: changing the boiler set temperature, pump operating modes, etc.

* Available in white or black version

Room regulator with RS communication

Functions implemented by the controller:

• room temperature control
• heating boiler temperature control
• hot water temperature control
• mixing valve temperature control (available when working with valve module)
• outdoor temperature display (available when working with valve module)
• weekly heating program
• alarm clock
• parental lock
• display of current boiler and room temperature trends
• screen saver – slideshow
• software update via USB

Controller equipment:

• large, clear, colorful, touch display
• 2mm glass front panel
• built-in room sensor
• RS communication cable to boiler controller
• module for wireless RS communication (additional option)

 

Connection to the controller can be done in two ways. The first is a 4-core cable connection on one end terminated with an RJ12 plug. The second way is wireless connection using the ST-260 communication kit. Both methods are shown in the diagrams below.

Connection diagram – wired connection

The 4-core cable is connected to the regulator connector in accordance with the wire color chart. The cable is terminated with an RJ12 plug, which we insert into the regulator power supply – the insertion point is marked in the diagram with number 2 (additional description is on the power supply itself). The regulator power supply is connected to the boiler controller with a 4-core cable also terminated on both ends with RJ12 plugs – the connectors in the diagram are marked with numbers 1.

Connection diagram – wireless connection

The 4-core cable is connected to the regulator connector in accordance with the wire color chart. This cable is terminated with an RJ12 plug which we insert into the v2 module – the insertion point is marked in the diagram with number 2 (additional description is on the module itself). The boiler controller is connected to the v1 module with a 4-core cable also terminated with an RJ12 plug - the connectors in the diagram are marked with numbers 1. *Optionally, a 6-pin connector may appear.