Gray top up tank

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Gray top up tank

Post  lb2tre on Sun Feb 05, 2012 10:45 am

HI,

I have a puslacoli 2000, but the gray top up tank needs topping up every month.

Is this usual? If not why does it need topping up so often?

Thanks

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Re: Gray top up tank

Post  mike on Mon Feb 06, 2012 2:21 am

You have a leak on the unit somewhere.
Could be good or bad.
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Re: Gray top up tank

Post  lb2tre on Mon Feb 06, 2012 2:52 am

Thanks Mike.

Not sure how a leak could be good???

I have had a look at the unit and cant see any water leaking out of it.

Where are the most likey places for the unit to leak?

Thanks

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Re: Gray top up tank

Post  mike on Mon Feb 06, 2012 3:09 am

The grey tank fills the unit.
You may have a leak on a pump, pipe or one of the heaters etc.
The above would be "good"
If the unit is leaking then that would be bad.
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Re: Gray top up tank

Post  Midland Boilercare on Tue Feb 07, 2012 11:19 am

Generally, if the top grey tank needs filling with that frequency, the unit itself has an internal structure leak.
The reason you can't see any water leaking from it at the moment is because the uniut is surrounded by polyurethane foam and this is absorbing the water like a sponge. It will get to saturation point at some time, and then you will see the evidence.

The bad news is that if it has leaked internally, then it will require replacing.
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Re: Gray top up tank

Post  linzandsim on Tue Apr 24, 2012 3:26 pm

I have had various problems with my pulsacoil, have been without hot water for two weeks. Having read through the posts it seems the problem may be concerning the grey tank on top. Having suffered quite a serious leak, we drained the boiler completely. An engineer came to replace the pump and we woke to the sound of high pitched whistling. we checked the top box and found it was empty. Having filled the tank a number of times, I was hoping you could advise if the fact that it keeps emptying is for the fact that it is re filling the boiler unit or that there is a leak. I am concerned as the tank empties within a matter of hours of being full. Please advise. Kind regards.

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Re: Gray top up tank

Post  mike on Tue Apr 24, 2012 4:35 pm

Right if you empty the unit it will take a lot of water to fill it.
If your unit say it is 140 litres for example then that is the amount of water required.
It does does include any water i the system if you have rads and boiler.
But let say you have a Pulsacoil 2000 or an A class. Then the 140 litres would be the amount.
So you must keep filling the unit unit full.
Then switch it on for a few seconds to allow the pump to run.
Keep doing that to help get rid of air.
And of course vent the pump to. Until water runs out of it.
If when full you lose water then it would be very apparent that you had a leak.
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Re: Gray top up tank

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