Vaillant 0020135785, Руководство по установке, Страница: 10 / 20

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SAFETy
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0020140122_03 - 12/19 - Vaillant
3.2.5 Multizone operation mode
The Multizone operation mode is compatible with:
– VRT 350 (using rotary switch position 0) or
– VRT 380 and VR 92 (using rotary switch position 2)
– system, combi and open vent boiler
The information about the heating or hot water demand is sent
by the room thermostat via the control centre to the boiler. The
VR 66/2 then decides if the hot water demand needs to be ful-
filled and drives the valves.
In this way, the boiler can store different target temperatures for
heating and hot water modes.
i
The multizone mode is only compatible with VRT 350
or VRT 380 combined with VR 92. No other room ther-
mostats are compatible.
The multizone mode will NOT support weather com-
pensation and cannot be used on Y plan systems with
three port motorised valves.
The standard installation for multizone mode is characterised by:
– 2 port valves for zoning,
– 2 VRT 350 programmable wired room thermostats or
– 1 VRT 380 room thermosthat combined with 1 VR 92,
– heating zones and DHW cylinder cannot operate in parallel.
Priorities are defined as follows:
Priority levels Function
1 Domestic hot water
2 Central heating