ST-408N – user's manual
IV.b) TECH regulator
This option allows the user to switch on/off the function of TECH room
regulator (e.g. ST-280 or ST-298). In order for the regulator to cooperate with the
right valve, the user should activate this type of room regulator and choose an
appropriate operation mode in the valve menu.
TECH regulator supports RS communication and it is connected to the
controller with a four-core cable (RJ12 telephone-type plugs).
If TECH room regulator is switched on, apart from room temperature
regulation, the user may adjust the set temperature of the active valves and the
water boiler directly from the room regulator, without having to go to the boiler
room. Another asset of the device is that it enables the user to view the history of
temperatures in the form of clear graphs. Moreover, all controller alarms are
signalled. The user may also check the outdoor temperature (in cooperation with
ST-61 valve module) and set the weekly program.
IV.c)
Additional contact 1, 2 and 3
This option allows the user to activate-deactivate an additional contact.
Contact 1 is connected to the 230V output whereas contacts 2 and 3 are connected
to dry outputs.
IV.c.1) CH
This option should be selected if e.g. the CH pump is connected to the controller
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Activation threshold – this option is used to set the temperature of device
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