2 zone CH and hotwater

Dangi

I was initially advised by the Tado bot that it was possible to install two V3+ wireless starter kits in my home. Following that advice, I installed:

• 1 bridge
• 2 wireless receivers
• 2 wireless thermostats
• 8 smart TRVs

While everything seemed to work fine at first, I’ve noticed that the receiver controlling the hot water and one heating zone occasionally crashes. Upon contacting support, I was informed that only one wireless receiver is supported!

My original system was a Camray 3 oil boiler with a timer-controlled hot water pump connected to a hot water cylinder, and two central heating pumps (one for the original house and one for an extension). There were no thermostats—only standard TRVs—operating through time controllers.

Is there a way to manage this setup effectively with two zones? Would it be possible to replace one of the wireless receivers with a wired thermostat installed near the boiler (since there’s no existing thermostat wiring in the house) and configure the smart TRVs in the original part of the house to work with the wired thermostat system instead?

Has anyone dealt with a similar configuration or found a workaround? Any advice would be greatly appreciated!

Thank you

policywonk

The Camray 3 is an ancient creature with, IIRC two returns at the bottom, two outputs at the top, one heading to CH, one heading to HW. It isnt a combie, it is a system boiler with one very high powered heat exchanger and two heating loops threading through it. I Had to decommission one in 2022 and replace it with two smaller more efficient boilers. IIRC the original flow pipes were 35mm!

Questions:

1. Do you still have a record of that wierd Tado recommendation? This is important as you may have reasonable grounds for complaint at some future point.
2. Our Camray 3 had two pumps, one on the HW flow side, and one on the CH flow side. Both wired were with a 2 min startup delay and a 10 min shutdown delay. There were no zone valves- just two relay driven pumps. Is this familiar, or does yours have zone valves- and if so, are they placed after the pumps or before them?
3. You have an extension, presumably fed by the second pump. Was it added inline, after the first CH pump, to boost the flow to the extension? Is there a zone valve in between the first pump and the second, to isolate the extension?

Really dont get why you were given that configuration. Would you fill out the rest of the set up, identifying the original controller, whether there are wired thermostats, and whether this is logically an S Plan Plus environment? Hope this makes sense.

policywonk

@Emcee Worried about the Ops information source.