Computherm E280 - 6.1. Connection of the Device(s) to Be Controlled

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while putting them into operation. The device should be
installed and put into operation by a competent person!
Ifyoudonotpossessthenecessaryskillsandqualica-
tions,pleasegetintouchwithanauthorizedservice.
Caution! The modication of the device poses a risk of
electricshockorbreakdown!
6.1. Connection of the device(s) to be controlled
Forcontrollingaone-zoneheatingsystem
The devices to be controlled should be connected to the termi-
nal block located on rear side of the product. In the thermostat
there are two potential free relays whose normally-opened con-
nection points are at legends K1COM-NO(3-4) and K2(8-9)
of the terminal block. When the thermostat gives a switch signal
then it will switch both potential free relays, and closes the two
connections points of K1 COM-NO (3-4) and K2 (8-9) sepa-
rately. Device(s) to be controlled should be connected here.
For controlling gas boilers the connection points of the boiler
thermostat should be connected to K1COM-NO(3-4)orK2(8-
9) connection points of COMPUTHERM E280 (Figure3). If the
device to be controlled has no thermostat connection point, the
power supply cable of the device to be controlled should be cut