Immersion heater query

[Welsh_sparky_21]

Wonder if someone can explain this to me, if youve got an economy 7 controlling your immersors how is it wired if you have an off peak and a boost option but there’s only one live connection within the unit?? Question 1 lol!

Question 2 - how would you wire it if you have 2 immersors but no off peak supply

 

[Avo Mk8]

Wonder if someone can explain this to me, if youve got an economy 7 controlling your immersors how is it wired if you have an off peak and a boost option but there’s only one live connection within the unit?? Question 1 lol!

Question 2 - how would you wire it if you have 2 immersors but no off peak supply

Q1. If you have a modern off-peak supply and meter, the whole house gets switched to off-peak rate at the set times. So you only need a single feed to an immersion programmer, and it switches the lower immersion at the appropriate times. A boost button powers the upper immersion.

If you have an 'old fashioned' Economy 7 seperate meter, and separate consumer unit for off-peak, you need one cable from that to the lower immersion, and another from the normal consumer unit for the boost option (and to run a programmer if needed)

Q2. I have this attangement you are asking about. A stand alone boost timer is connected to the upper immersion (hardly ever used), and a Timeguard wifi switch is connected to the lower immersion, set for a couple of hours in the morning, and again in the early evening. I can turn the HW on/off remotely if I need (which is used more than the boost timer!). Alternatively any immersion timer could be used.

 

[Welsh_sparky_21]

Q1. If you have a modern off-peak supply and meter, the whole house gets switched to off-peak rate at the set times. So you only need a single feed to an immersion programmer, and it switches the lower immersion at the appropriate times. A boost button powers the upper immersion.

If you have an 'old fashioned' Economy 7 seperate meter, and separate consumer unit for off-peak, you need one cable from that to the lower immersion, and another from the normal consumer unit for the boost option (and to run a programmer if needed)

Q2. I have this attangement you are asking about. A stand alone boost timer is connected to the upper immersion (hardly ever used), and a Timeguard wifi switch is connected to the lower immersion, set for a couple of hours in the morning, and again in the early evening. I can turn the HW on/off remotely if I need (which is used more than the boost timer!)

That makes sense mate thanks for that

 

[Welsh_sparky_21]

Q1. If you have a modern off-peak supply and meter, the whole house gets switched to off-peak rate at the set times. So you only need a single feed to an immersion programmer, and it switches the lower immersion at the appropriate times. A boost button powers the upper immersion.

If you have an 'old fashioned' Economy 7 seperate meter, and separate consumer unit for off-peak, you need one cable from that to the lower immersion, and another from the normal consumer unit for the boost option (and to run a programmer if needed)

Q2. I have this attangement you are asking about. A stand alone boost timer is connected to the upper immersion (hardly ever used), and a Timeguard wifi switch is connected to the lower immersion, set for a couple of hours in the morning, and again in the early evening. I can turn the HW on/off remotely if I need (which is used more than the boost timer!). Alternatively any immersion timer could be used.

could you use an economy 7 quarts timer supplied from 1 16a mcb controlling both immersors? One cable on the off peak terminal going to the bottom immersor and the other on the boost terminal going to top immersor?

 

[Avo Mk8]

could you use an economy 7 quarts timer supplied from 1 16a mcb controlling both immersors? One cable on the off peak terminal going to the bottom immersor and the other on the boost terminal going to top immersor?

I think you can because I believe the timer prevents both immersions being on at the same time, but I'll check and get back to you later.
Edit: yes the timer disconnects boost when the lower immersion is on, so what you suggest is fine.

 

[Welsh_sparky_21]

I think you can because I believe the timer prevents both immersions being on at the same time, but I'll check and get back to you later.

Yeah that’s what I was thinking, thanks mate