Mains gas boilers
@derek-m i was just wondering what your thoughts are about using weather compensation to modulate the water flow temperature of a mains gas boiler.
Turns out i can use a Tado controller to modulate the water flow of my Worcester Bosch boiler. I thought the boiler would be too old.
Am just checking with Worcester Bosch if they still sell a controller themselves that does something similar. I just have a standard basic wired danfloss controller at the moment.
I seem to remember reading you were modulating the temperature of your gas boiler but may be mistaken.
Posted by: @jeff@derek-m i was just wondering what your thoughts are about using weather compensation to modulate the water flow temperature of a mains gas boiler.
Turns out i can use a Tado controller to modulate the water flow of my Worcester Bosch boiler. I thought the boiler would be too old.
Am just checking with Worcester Bosch if they still sell a controller themselves that does something similar. I just have a standard basic wired danfloss controller at the moment.
I seem to remember reading you were modulating the temperature of your gas boiler but may be mistaken.
Hi Jeff,
We actually have an old Baxi Bermuda back boiler, which is very much 'handamatic' without any fancy controls, and is normally set at the minimum output temperature. The way I control our heating system is by monitoring the temperature of one of the radiators, which is compared against a calculated required temperature. When the radiator temperature falls, the boiler and water pump are switched on and warm water is pumped around the system. When the temperature of the radiator increases above the calculated value the boiler and pump are switched off.
I understand that more modern boilers are capable of temperature modulation but have not delved into their capabilities.
Please post what you find out from Bosch as I feel certain others will be interested.
Ours is a condensing system boiler so we have a hot water tank.
worcester bosch greenstar 30cdi classic
Installed in 2016 so reasonably new but not intelligent setup. More recent installations have more intelligent controls from the start i hear.
Just a basic wired Danfloss controller and fixed Danfloss thermostat currently in the downstairs hall.
If you want to check compatibility with Tado then email them technical-advice@uk.bosch.com. I supplied them with model and serial numbers to be certain.
Tado confirmed our boiler is compatible with tado in a modulate way via a Junkers HT BUS interface in our boiler. Tado also have smart TRVs that integrate as well.
Am just waiting to hear exactly what Tado kit they recommend to replace our Danfloss controller and how it should be connected as it should be self install in theory. Will post when i hear.
Will post when i hear back from my query to Worcester Bosch via their website so i have something to compare against. I would hope one lf their smart controllers would be compatible.
@jeff this will work if you have the appropriate wiring centre from Bosch, or the boiler has priority hit water.
Bosch though are something of a technoluddite company unfortunately though
Professional installer
So Worcester Bosch replied and for my specific boiler i would need to get someone to install their optional internal diverter valve kit if i want to then use worcester bosch smart controls. Probably not something i am interested in doing if it turns out the tado control can be installed for less and do something similar albeit not the same.
Indeed I suspected that would be the answer.
it would be worth doing if it is straightforward ie cylinder next to boiler or both pipes serving cylinder back to boiler.
by not doing that the Tado will work on the one-off relay but you are not optimising the boiler to be as efficient as it could be, birthed saving using the bus connection would only be in the order of 10-20% depending on how you use it
Professional installer
Posted by: @alec-morrowIndeed I suspected that would be the answer.
it would be worth doing if it is straightforward ie cylinder next to boiler or both pipes serving cylinder back to boiler.
by not doing that the Tado will work on the one-off relay but you are not optimising the boiler to be as efficient as it could be, birthed saving using the bus connection would only be in the order of 10-20% depending on how you use it
Not impossible as you say.
The boiler, cold water header tank and the two Danfloss 2-Port values (one for water, one for heating) are in the loft, with the boiler in the airing cupboard below on the first floor. All the water pipes run down the side of the airing cupboard.
Will go back to Tado again as they were sure they could modulate the water flow temperature although given what worcester are saying about their own controller i wonder if they are mistaken. I know they have had some success with some boilers where even the manufacturers have struggled.
- 24 Forums
- 1,413 Topics
- 29.7 K Posts
- 37 Online
- 1,198 Members
Join Us!
Latest Posts
-
RE: ASHP Advice: High Temperature vs. Low Temperature Heat Pump For Microbore
I don't think that ot is necessarily the case that you ...
By JamesPa , 13 seconds ago
-
All heat pumps will hit the point where their minimum o...
By HarriUp , 35 mins ago
-
-
RE: Viessmann Vitocal 250-A in the UK
For reference, I have a 10 kWh Viessmann 151-A installe...
By GC61 , 2 hours ago
-
RE: Vaillant Arotherm Settings for New Installation
@drew-pa Ah thanks. Good to know I dont have a misconce...
By bontwoody , 2 hours ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
On the whole marketing claims vs reality on performance...
By GunboatDiplomat , 2 hours ago
-
RE: Gas Combi to ASHP - Making sense of survey results and proposal.
@harriup If the radiators need to be twice the size t...
By IRMartini , 3 hours ago
-
RE: Installing your own ASHP - DIY
The work continues! I've finally finished doing my s...
By tomasmcguinness , 6 hours ago
-
RE: Microbore Central Heating Plumbing, will it be a barrier / pain?
@mattc All the existing (designed for T50) radiators ar...
By IanMK13 , 17 hours ago
-
The temporary fix has reconnected about 60% of users, a...
By Abernyte , 19 hours ago
-
RE: What is Wrong with our Heat Pump Installation?
Having to run the heat pump during the summer for DHW s...
By Toodles , 21 hours ago
-
Issues with Vaillant connectivity via the MyCONNECT gateway
I'm sensing a variety of issues with Vaillant connectiv...
By dr_dongle , 23 hours ago
-
Interesting heat pumps installations
Thought it would be cool to share photos of interesting...
By Mars , 23 hours ago
-
RE: Say hello and introduce yourself
@Toodles That's very interesting to hear, thanks. I ha...
By dr_dongle , 23 hours ago
-
RE: Massive Electricity Cost for Running My Air Source Heat Pump
@allyfish In fairness installer has replied stra...
By Holts , 1 day ago
-
-
RE: Are Solar Diverters Necessary for Homes with ASHPs and Solar PV?
@zzxap19 that's a fair point. With the eddi, is it poss...
By Mars , 2 days ago
-
RE: Delivering a smart and secure electricity system: government consultation
"I don't think I'll need to refer to past iterations of...
By eggnchips , 2 days ago
-
RE: Error on Immersun – Error 8 Load Short Circuit
@julesmp8 fingers crossed. I have to say our Immersu...
By Mars , 3 days ago
-
Latest Topics
-
Issues with Vaillant connectivity via the MyCONNECT gateway
By dr_dongle 23 hours ago
-
Interesting heat pumps installations
By Mars 23 hours ago
-
What is Wrong with our Heat Pump Installation?
By Mars 2 days ago
-
Fossil Fuel Fired Heating v Heat Pump?
By Toodles 2 days ago
-
Viessmann Vitocal 250-A in the UK
By treehugger 4 days ago
-
By HUBB84 6 days ago
-
By jswhite 6 days ago