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Hi All, I am in the process of trying to get my Vaillant AroTherm Plus 7K to cool.. We have installed the cooling chip in the main ASHP and have activated cooling in the installer mode menu on the vr720f but when we try to get the unit to cool either in manual, timer or by forcing it to cool...

Hi All, I am curious to know if anyone can protect with some information related to the Vaillant AroTherm plus VWZ AI controller? Does anyone have any suggestions to improve performance here??? EG: I noticed that the DHW pump speed is set to 100% by default. Is this necessary??? Has anyone...

Hi All, I recently just completed my first installation of a Vaillant AroTherm Plus 7kw ASHP and just noticed that there is an F70 fault on the VWZ AI controller unit? This is a common issue for Vaillant boilers that need to have a Designated System Number setup. Is this also the case for the...

Hi All, I am currently installing a Vaillant AroTherm Plus 7kw Heat pump with a custom built cylinder. Can anyone tell me where I connect the immersion heater??? I have had a look at Vaillants schematics and it’s not clear to me? I am also a little unsure about the secondary circulation pump...

Hi All, A very quick question: How do I remove euro cones from the trails of underfloor heating loops? Is there a good way (tool) without destroying the pipe? I have 2 different sized cones and the older ones really restrict the flow of water due to the reduced size (6mm vs 10mm) Hope...

Hi All, I was wondering if someone can explain to me how you wire up a Vaillant AroTherm Plus with a SensoNET 921 and sensoComfort 720F/2. I just purchased an accessory for the SensoNET 921 that is used instead of a mains plug adapter. (See image below) As referred to in the SensoNet manual...

Hi All, i have a Quick question with regards to a secondary return. I am in the middle of installing an ASHP with a Heat Geek high performance unvented cylinder. I have a question with regards to where to join the secondary return. 1. Directly into the cylinder 2. Into the Hot water run close...

I have a very tight install for a new retrofit Heat Pump and was wondering if I can have a Spirotech mb3 filter between my unvented cylinder and the T of to my expansion vessel on the return for my heating circuit or is it better to put it on the flow???

Hi All, I have a question with regards to an unvented Heat Geek Newark Cylinder. I recently saw an install of the New HeatGeek cylinder on the Skill builder YouTube channel and noticed that they had removed a sensor pocket and replaced it with a PRV. Ultimate Heat Pump Installation. Rip It Out...

Hi All, I am in the middle of tiling an outdoor patio and for the outdoor steps I need to create a mitre joint along the full length of a 120cm tile to for an L shaped lip (nose). My plan is to use a coloured epoxy to glue the 2 piece together and then use an epoxy grout to finish. What do...

Hi Everyone, I have a question with regards to a specific requirement I have for an electric 3 way diverter 28mm valve on an ASHP installation? As far as I know most 3 way valves are configured so the flow comes into the bottom of the 3 way valve (Inlet: C) and then the water either flows out...

Hi All, Can someone help me identificere What size DN pipe diameter the below stainless steel flex hose is? I dont usually work with this type of flex hose and due to the corrigation i am not sure What size annular fitting I need? Is it based on the internal bore size of the external...

Hi Everyone, I was wondering if anyone knows of a way to shorten a flexible stainless steel flex hose for a Vaillant ASHP? I have previously purchased flex connection hoses from Vaillant that could be shortened using a circlip, but it would appear that they have changed their manufacturing...

Hi All, I am curious to hear if anyone knows if the Vaillant VR33 Module that can be used to convert Vaillant Boilers to support OpenTherm also works together with the Vaillant AroTherm ASHP range? As far as I can understand Vaillant uses a very old protocol (eBus) for communications between...

I am considering using a custom built heat pump cylinder with a dual coil setup to maximize the heat transfer from Heat Pump to the DHW Cylinder. Ideally you want to run a heat pump at as low a flow temperature as possible to maximize the SCOP. Therefore having a custom cylinder with 6m2 of...

Hi Everyone, Does anyone know if there is a difference between the Vaillant AroTherm Plus 7k sold in the U.K. vs the EU model? I can see that there’s a huge price difference with items such as the VRC 720 F wireless controller and that generally speaking the AroTherm Plus is sold separately to...

Hi All, I am considering installing a Vaillant Arotherm Plus 7kw heatpump in my house. Does anyone know if the Arotherm Plus 7Kw includes a controller unit (wiring center)? I previously lived in Denmark and Vaillant supplied a seperate VWZ AI Controller and this could be paired with a Vaillant...