Hi, I have a Vaillant Ecotec Plus 618 in a 3-floor 7 bedroom house with 2x 200L unvented cylinders and 3 central heating zones.
The central heating has 3 wireless roomstats which I'm upgrading now to ones with wifi, but the hot water has no timer/controller at all and both cylinders operate equally (none has priority).
Queries:
Is it worth adding a hot water timer/controller, or chaning the set up so one cylinder has priority?
If so any recommendations and advice what hot water controller to add, I'd like one that has wifi for easy programming via a app?
More info:
The 3 central heating zones are controlled via 3 rather basic wireless thermostats (battery-operated remotes - big mistake!) from Tower/TFC which I'm upgrading now to their latest "Optimum Vibe" (link) model because the wiring is identical for the wireless stat receivers but it has wifi and smart home / app support - and even opentherm if it's ever needed. (I may even get the Vaillant VR33 adaptor to get OpenTherm modulating for this boiler with the new roomstats.)
The hot water has never had a controller so it just relies on the cylinder stat to switch the zone valves for each of the 2 cylinders on and off. The cylinders operate equally, neither has priority, top outlets (to the hot taps) are linked and form one common outlet. In theory if their heat-cool cycle are totally out of sync then that's maybe inefficient.
Also there's a secondary flow and return with its pump on a 7d timer, set to kick in during expected peak times.
thanks,
Ash
The central heating has 3 wireless roomstats which I'm upgrading now to ones with wifi, but the hot water has no timer/controller at all and both cylinders operate equally (none has priority).
Queries:
Is it worth adding a hot water timer/controller, or chaning the set up so one cylinder has priority?
If so any recommendations and advice what hot water controller to add, I'd like one that has wifi for easy programming via a app?
More info:
The 3 central heating zones are controlled via 3 rather basic wireless thermostats (battery-operated remotes - big mistake!) from Tower/TFC which I'm upgrading now to their latest "Optimum Vibe" (link) model because the wiring is identical for the wireless stat receivers but it has wifi and smart home / app support - and even opentherm if it's ever needed. (I may even get the Vaillant VR33 adaptor to get OpenTherm modulating for this boiler with the new roomstats.)
The hot water has never had a controller so it just relies on the cylinder stat to switch the zone valves for each of the 2 cylinders on and off. The cylinders operate equally, neither has priority, top outlets (to the hot taps) are linked and form one common outlet. In theory if their heat-cool cycle are totally out of sync then that's maybe inefficient.
Also there's a secondary flow and return with its pump on a 7d timer, set to kick in during expected peak times.
thanks,
Ash