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Central heating comes on, even if the control panel is just set to "hot water"

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Powada

Both my central heating and hot water come on, even when the control panel is just set to hot water. I will put up pictures of both.
IMG_2854.jpgIMG_2855.jpgIMG_2851.jpg
The first picture shows the control valve for the hot water tank (it is the same make as the control panel - Danfoss)
The second picture shows the boiler controls (Volkera Mynute 14se)
The third picture shows the control panel (the same make as the hot water valve - Danfoss)

Why do both come on even when I just want hot water?
 
You have a system boiler with a flow and return, they are conected to your radiators, a pipe then comes off your flow through that valve in pic 1 to your hot water cylinder, that valve controls how hot the cylinder gets.The hot water cylinder "shares" the same heating circuit as the radiators. You have no 3 way valve to physicaly turn off the flow to the rads or to the cylinder so everything is on at once. Welcome to 1982.
 
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Blackcatgas said:
You have a system boiler with a flow and return, they are conected to your radiators, a pipe then comes off your flow through that valve in pic 1 to your hot water cylinder, that valve controls how hot the cylinder gets.The hot water cylinder "shares" the same heating circuit as the radiators. You have no 3 way valve to physicaly turn off the flow to the rads or to the cylinder so everything is on at once. Welcome to 1982.
Click to expand...

Aaaah! That has shed some light. Thankyou very much!
 
Blackcatgas said:
You have a system boiler with a flow and return, they are conected to your radiators, a pipe then comes off your flow through that valve in pic 1 to your hot water cylinder, that valve controls how hot the cylinder gets.The hot water cylinder "shares" the same heating circuit as the radiators. You have no 3 way valve to physicaly turn off the flow to the rads or to the cylinder so everything is on at once. Welcome to 1982.
Click to expand...

Just two more questions:

Why does the box give me the "option" of just having the hot water on in the first place if the system wasn't designed for it? Is it less than scrupulous plumbing?
Could I add a 3-way valve with all the existing control panels, boiler etc...
 
yes you could have a three way valve fitted. best to get a plumber in because wiring needs to be adapted as well as the pipes.
 
steveb said:
yes you could have a three way valve fitted. best to get a plumber in because wiring needs to be adapted as well as the pipes.
Click to expand...

Unfortunately not! Your travel expenses would cripple me! Haha! I live in Aberdeen!
 
Powada said:
Just two more questions:

Why does the box give me the "option" of just having the hot water on in the first place if the system wasn't designed for it? Is it less than scrupulous plumbing?
Could I add a 3-way valve with all the existing control panels, boiler etc...
Click to expand...

The control is for a gravity system, this has 4 pipes from the boiler 2 flows 2 returns,(two circuits) one circuit runs from the boiler round all the radiators and back to the boiler, the other circuit runs up to the cylinder and back to the boiler. with a gravity sytem it can be turned on to hot water only, this fires up the boiler and sends the heat up to the cylinder by radiation ie ther is not pump to shunt the water around the circuit it just relys on the hot water rising, when in hot water and heating mode it simply turns on a pump in the other circiut (the radiator circuit).
really they should have used a 1 channel programer but he probably had this one availiable at the time.
 
If you're brave ... and competent ... Danfoss have typical system wiring diagrams for that programmer here:SET2E
 
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