Originally posted by top brake
View Post
Evohome replace existing dial thermostat
Collapse
X
-
Originally posted by top brake View Postusing the R8810A1018 will allow the boiler to modulate rather than being switch 0 or 100% using TPI on a cycle/minimum run time basis
the benefits of modulating the boiler include lower gas use, more efficient operation and closer more stable control
R8810A1018 is powered from the OpenTherm terminals on the boiler so no mains supply needed
regarding purchasing all the parts are available separately so if you don't need a BDR91 to control boiler you can buy the (spare) controller, R8810A1018 and either desk or wall mount
parts list on back of brochure
http://www.honeywelluk.com/Documents...20approved.pdf
Can you please direct me to instructions on how to connect the R8810A1018 to the Evohome system and to the combination boiler?
Comment
-
-
Originally posted by jonboy View PostThank you for your reply.
Can you please direct me to instructions on how to connect the R8810A1018 to the Evohome system and to the combination boiler?
the OpenTherm Bridge is a 2 wire connection direct to the boiler, no power supply
The binding is done at the boiler relay level either in guided config or under system devices
hope this helpsI work for Resideo, posts are personal and my own views.
Comment
-
-
Thanks top brake.
Is the OpenTherm setup for an appropriate combination boiler with c.h. control only, and no motorised valves, really as simple as a 2 wire connection from the R8810A1018 to the boiler and a powered ATP921R3100 linked by wifi to the R8810A1018?
Is the existing digital timer/controller simply removed and the unused wiring sealed off in block terminals, and the Danfoss hall thermostat removed and only the power cable used to power the ATP921R3100? I suggest this latter approach just in case the Honeywell Evohome system is ever removed and the original control system reinstated reinstated.
If so is there any other fine tuning of the combi boiler or whatever?
Comment
-
-
Indeed it is that simple. Note that the wireless link between the evohome controller and the OpenTherm Bridge is actually 868 MHz.
Depends on the appliance. What do you have?
Originally posted by jonboy View PostThanks top brake.
Is the OpenTherm setup for an appropriate combination boiler with c.h. control only, and no motorised valves, really as simple as a 2 wire connection from the R8810A1018 to the boiler and a powered ATP921R3100 linked by wifi to the R8810A1018?
Is the existing digital timer/controller simply removed and the unused wiring sealed off in block terminals, and the Danfoss hall thermostat removed and only the power cable used to power the ATP921R3100? I suggest this latter approach just in case the Honeywell Evohome system is ever removed and the original control system reinstated reinstated.
If so is there any other fine tuning of the combi boiler or whatever?I work for Resideo, posts are personal and my own views.
Comment
-
-
Originally posted by top brake View PostIndeed it is that simple. Note that the wireless link between the evohome controller and the OpenTherm Bridge is actually 868 MHz.
Depends on the appliance. What do you have?
The combination boiler is a relatively new Viessmann Vitodens 100W. It was installed in this new property just over one year ago.
Can you please explain further? ......... "that the wireless link between the evohome controller and the OpenTherm Bridge is actually 868 MHz". Does this require anything special from a more conventional BDR91 set up?
Would weather compensation for this boiler be irrelevant with OpenTherm Bridge?
Comment
-
-
Originally posted by jonboy View PostThanks again top brake, that inspires me with more confidence to go ahead with this system.
The combination boiler is a relatively new Viessmann Vitodens 100W. It was installed in this new property just over one year ago.
Can you please explain further? ......... "that the wireless link between the evohome controller and the OpenTherm Bridge is actually 868 MHz". Does this require anything special from a more conventional BDR91 set up?
Would weather compensation for this boiler be irrelevant with OpenTherm Bridge?
It can work in place of the existing weather compensator or in harmony with it. Depends how the boiler is configured.I work for Resideo, posts are personal and my own views.
Comment
-
Comment