Atag BC100124, Appliance Technical Manual

Page: 26 / 36

ATAG 3-port external diverter valve
and ONE controller kit - CT500111 or CT500112
(iS system boiler only)
Vented hot water cylinders
The 3-port diverted kit can only be fitted to a system boiler.
The 3-port kit is fitted external to the iS system boiler
and is controlled by the ONE controller to give priority to
hot water. Once the cylinder stat senses the required hot
water temperature and there is a call for heat the diverter
valve will move to provide central heating.
The installation will use the cylinder sensor supplied
within the 3-port diverter valve kit to control the hot water
temperature. Therefore no other cylinder thermostat is
required.
The ONE controller will control the heating and hot water
time and temperature requirements.
The weather compensation for heating will be controlled
by the boiler and ONE controller via the internet
connection and postal code weather data. An optional
outside sensor (ARZ0055U) can be added to the 3-port
diverter valve kit to sense the outside temperature
specifically for the individual property.
When put into heating mode there the diverter is powered.
Brown & Blue 230V, Black & Blue 0V.
When put in hot water mode there is a switch of power.
Brown & Blue 230V, Black & Blue 230V.
So, hot water power put on Black & Blue, heating power
taken off Black & Blue.
26