Removed text

AskAsk

Removed text

nofoollikeold

Assuming a vented hot water cylinder, the job should be:
1. Turn off cold feed to base of cylinder. Turn off power to both heaters.
2. Slacken both immersion heaters and nip back up
3. Drain cylinder.
4. Remove and replace bottom immersion.
5. Start filling cylinder.  Keep an eye on level. Stop and restart if necessary.
6. Remove and replace top immersion.
7. Rewire both immersions, order irrelevant.
8. Turn on top immersion.  Check starting to heat.  Ask customer and turn off if asked.
9. Turn on bottom immersion.  If on Economy 7, nothing is going to happen until power comes on.  
No need for waits.  Courtesy call to customer following day to make sure overnight worked if Economy 7.

fenwick458

AskAsk said:

Anyone can think of a reason why he said to leave the tank turned off for an hour before turning it on?  Is it because it took time to fill?  Should he not have made sure it was working before he left??

I'd say to give the engineer enough time to clock off and go home for the weekend!
should have checked it was working before leaving in my opinion, if the cylinder was empty he'd still be able to do IR and continuity checks on the element, and to test the circuit upto the local isolator without powering it up.

DiddyDavies

AskAsk said:

Anyone can think of a reason why he said to leave the tank turned off for an hour before turning it on?  Is it because it took time to fill?  Should he not have made sure it was working before he left??

If I was being a cynic, I would say that the reason for being told to wait an hour is because the Dynorod fitter had already tested it once and it failed and rather than have to spend time faultfinding and possibly having to replace the heaters again, he asked you to wait an hour before turning it on so that he would be long gone and possibly off shift by then.

What was the reason for needing to get both of the immersion heathers replaced?

fenwick458

seems odd that they would replace both when only one was faulty. maybe they sent a plumber to do the job?

nofoollikeold

What sort of hot water cylinder is it?  If unvented, then only manufacturer approved immersion heaters should have been fitted, and the fitter should have been G3 registered - unlikely for an electrician.