Resol HKM3 Manuel page 15

HKM3 heating circuit module
The HKM3 heating circuit extension module enables the control of an additional
heating circuit. A simple VBus connection is enough to add a complete weather-
®
compensated heating circuit to the controller.
The HKM3 is equipped with 6 sensor inputs, one of which can be used for the
optional RTA remote control. Four semiconductor relays are available for control-
ling the mixing valve and the heating circuit pump. Additionally, a potential-free relay
takes care of afterheating demand.
In combination with the controller connected, the HKM3 not only controls the
basic functions of the heating circuit and the DHW priority, it also has an antifreeze
function and a blocking protection for the heating circuit pump.
Contents
1 Overview ............................................................................................ 16
2 Installation ......................................................................................... 17
2.1 Mounting ..................................................................................................................... 17
2.2 Electrical connection ................................................................................................ 18
2.3 Sensor and relay allocation of the HKM3 ............................................................ 19
2.4 Application example ................................................................................................. 19
3 Commissioning, operation and adjustment .................................... 19
3.1 Flashing codes of the control lamp ....................................................................... 19
3.2 Manual mode .............................................................................................................. 20
4 Channel overview .............................................................................. 20
5 Troubleshooting ................................................................................. 22
6 Accessories ........................................................................................ 23
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