8
Modulating central heating control
TheWiZeclockthermostatmeasurestheroomtemperature
and uses it to determine the area’s heat demand. Depending
on room temperature the thermostat determines the water
temperature required by the boiler. As a result the boiler also
determines the capacity required resulting in optimum heat
input to the house combined with the lowest energy consump-
tion possible.
Weather dependent control
TheWiZeclockthermostatcanalsobeusedasaweatherde-
pendent control. The major difference as opposed to ordinary
room temperature control is that when the weather dependent
control is switched on the boiler input temperature is being
controlled instead of the temperature of the room where the
thermostat is located. The control is called ‘weather dependent’
because it uses an optional outside temperature sensor. In
combination with thermostatic radiator valves throughout the
house, room temperatures for each room can be controlled
individually. Depending on measured outside temperatures
and the heating curve set on the thermostat, the boiler’s water
temperaturewillincreaseordecrease.Effectively:Thecolder
it gets outside, the hotter the boiler’s water will get and vice
versa.
Refer to chapter 5.8 for additional information.
Timer function
Using the timer function you can select either a set time or a
xedtemperature.Duringalongerabsence,forinstance,ital-
lows you to temporarily select a lower temperature or a higher
temperature for a party or when you are doing overtime.
Refer to chapter 5.3 for additional information.
