heatmiser

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    Heatmiser UH4 - Wiring Zone Valve / Manifold Pump

    Hi everyone, hope you are well. I am looking at installing the UH4 for our 2 zone wet UFH system. According to the diagrams, there is only one input labeled "MANIFOLD PUMP OR VALVE" with Live, N and earth connections. I am still in two minds whether we need a 2 port zone valve or not as the...
  2. S

    Replacing existing Honeywell wired thermostat and hot water (Y plan) with Heatmiser smart control and possible wireless thermostat

    Hi, I have a Honeywell timer and room thermostat with one zone for CH and one for HW under Y plan mid position valve. I am looking to replace it with Heatmiser control so that I can control the heating and hot water remotely and use the geo location feature that turns off CH if no one is...
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    Grundfos pump flashing green LED

    I have a Grundfos UPM3 Flex AS pump for my UFH system. The lights on it are as follows: LED 1: Flashing green maybe every second LED 2: off LED 3: Solid yellow LED 4: Solid yellow LED 5: off I understand the yellow LED's indicate the speed/performance setting it is set to and I can change this...
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    Replace Horstmann H17XL programmer/complex underfloor heating

    Good afternoon, I was hoping someone could help me/give me advice here regarding improving our heating system at home: We've moved into a house that we bought earlier this year and the boiler and heating controls were outdated so we upgraded the boiler to a Worcester Bosch Greenstar 8000 Life...
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    Make heatmiser underfloor and radiator system smarter

    House is a 1930s semi-detached house that was gutted out and done up ~5 years ago. It's reasonably well insulated. It has a Valiant system boiler (gas) paired with a Joule unvented cylinder. The hot water is controlled by a honeywell timer, the heating side of it is left on permanently and...
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    Nest E to Heatmiser UH4

    Hello, I am new to this great forum so first of all apologies if this has already been covered somewhere else. Here goes: I have a WB Greenstar 8000 Life boiler for all my radiators in the house. This is controlled by a battery operated, 2-wire Nest-E which was installed by the plumber at the...
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    UH8-RF wiring for UFH and Rads

    Hi I purchased a UH8-RF with 3 Neoair stats to control a combi system with rads upstairs and 2 UFH zones downstairs in an S Plan format with 2 x 2 port valves. Just looking at the wiring diagram on the UH8-RF and wonder why it shows using the boiler output along with the valve switch (grey and...
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    Advice on new Smart Central Heating and UFH system

    Hi All, I am getting a new Central heating system installed and looking for advice on the best design. The heating system will consist of the following components: System Boiler. Megaflo. 2 Zone Underfloor heating. 15 Radiators. I have narrowed it to the Heatmiser Neo stat system or...
  9. D

    Wiring Heatmiser Receiver

    Hi, Am trying to replace the currently installed Honeywell BDR91 receiver with Heatmiser Slimline RF switch. But am confused with the wiring. In the BDR91 there are only 3 other points apart from the mains (A, B, C) but the Heatmiser has 8 (COM1 & 2, NC 1 & 2, NO1 & 2, LS, LR). Am not really...
  10. D

    Updating my heating system with smarth thermostats

    Hoping somebody can help as I'm not too clued up in these things. I moved in last year to a house that has a Vaillant boiler with radiators upstairs. The rads upstairs are controlled by a Timeguard room stat and a Horstmann Centaurplus C27 programmer. The C27 is programed for set times of the...
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    Upgrading wet UFH REHAU analogue thermostats with Heatmiser neoStat V2

    Hi DIYNOT I've searched this forum but not found anything matching my current issue, so please kindly help me. I have a property with wet underfloor heating, a REHAU system with 4 zones each with their own REHAU Star 20 thermostat. These are basic analogue dial thermostats. My intention is to...
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    Underfloor system - Electricity Bill

    Hi all, I am hoping you can help me with something that I am battling with… We have an extension with underfloor heating system, controlled by a Heatmiser Neo – neoHub with 2 x neoStat V2 Programmable Thermostat. (one for wet room and one for living area) This has worked well for about a year...
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    Heatmiser Smart Heating Installation Experience

    Part 1 I have been looking for some time at various smart heating set-ups and weighing up the different options. I have a 8 Rad + towel rail system on a 32 CDI and I specifically wanted controlled valves on each radiator to allow multiple room temperatures to be configured I was an early...
  14. J

    Replacement Wireless Thermostat Wiring

    I am replacing my old RF thermostat (Tower RF-205) with a Heatmiser RF-Switch but just wanted confirmation on the wiring. The old thermostat has 4 terminals. Live and Neutral I'm happy with but for some reason they have labelled the other two Out 1 and Out 2. The new receiver has a ton of...
  15. S

    What Heating Controls do I need for a 3 zone system (UFH plus Radiators)?

    As part of a renovation, our plumber installed UFH in the main ground floor areas, as we were having new floors laid. Rads were installed in the rest of the house. The UFH is in two separate zones (separate flow monitors for each). Therefore, a 3 zone system in total. The plumber left us with...
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    Conflict between wiring centre diagram and wireless receiver diagram

    Hi all, I'm yet another poor sole trying to get their heads around central heating wiring. I've currently got a Salus IT500 configured to run just central heating. Boiler is a Worcester 34CDI. Now i've added UFH to downstairs I want to be able to control 2 zones, upstairs rads and downstairs...
  17. S

    Replacing Heatmiser PRT with Hive Stat

    Hi I have replaced my Potterton Ep2000 with the Hive module and everything is up and running except my existing Heatmiser room stat is overriding the Hive stat. Does anybody know what steps I need to take to change the wiring in the Heatmiser stat so the Hive can control the CH. Heatmiser...
  18. J

    Changing heatmiser wireless receiver

    Hi, I am trying to replace a broken and now discontinued heatmiser rc1-w with a newer heatmiser from switch. I had to get a plumber out to diagnose, but he didn’t have the spare parts, so I said I’d wire in the replacement as it was just a case of putting the same wires back in the same...
  19. S

    Vaillant/Heatmiser wiring problem

    I have a Vaillant ecoTEC plus 630 system boiler supplying 4 central heating zones (3 radiator and one wet underfloor) and one unvented hot water cylinder. The system is controlled by a Heatmiser wiring centre linked wirelessly to 4 room thermostats/timers. When the heating is on and the hot...
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